DENTAL ADVISOR 2026 AWARDS RECOGNISING KURARAY NORITAKE PRODUCTS FOR EXCELLENCE AND RELIABILITY

As clinical demands continue to rise and chairside time becomes increasingly precious, dental professionals are nowadays looking for materials and devices that truly deliver in daily practice – while demanding less of themselves. In this context, efficiency, ease of use and long-term performance have become decisive factors in product selection.

In a market characterized by frequent product introductions and bold claims, however, identifying the most suitable solutions can be challenging. A useful guide to well-founded decisions: Independent evaluations that combine rigorous laboratory testing with real-practice clinical assessments. One of the most trusted institutions offering this kind of evaluations in the Dental Advisor. Once per year, this respected authority in dental product testing publishes its Top & Preferred Product and Research Awards – highlighting those products that stand out not only for innovation, but for proven, consistent performance.

In 2026, several solutions from Kuraray Noritake Dental Inc. were recognized – ranging from a new universal flowable composite to long-established materials that continue to define modern restorative and adhesive dentistry.

A PROMISING BLEND OF CHARACTERISTICS: RESEARCH AWARD WINNERS

According to Dental Advisor, “Companies that receive Research Awards demonstrate a commitment to advancing dental technology and enhancing patient care.” Product properties are tested in the Dental Advisor Biomaterials Research Center to evaluate the scientific performance and identify those materials with the most promising blend of characteristics.

1. CLEARFIL™ Universal Bond Quick 2 (Research Award and Preferred Product)

Launched in 2025, CLEARFIL™ Universal Bond Quick 2 is an enhanced version of the popular multi-mode adhesive CLEARFIL™ Universal Bond Quick. Both stand out due to their minimal application time. Research conducted at the Dental Advisor Biomaterials Research Center demonstrated excellent bond strength to enamel and dentin, even after artificial aging and saliva contamination. The latter indicates a consistent performance even in wet environments like the oral cavity. The in-vitro tests also confirmed a thin film thickness (3-5μm), supporting accurate seating of indirect restorations.

2. CLEARFIL MAJESTY™ ES Flow Universal (Research and Top Product Award)

CLEARFIL MAJESTY™ ES Flow Universal is a highly filled flowable composite launched in 2025. It features submicron fillers (78% by weight) and a simplified universal shade system enabled by light diffusion technology. Independent testing in the Biomaterials Research Center of the Dental Advisor confirmed that it delivers some of the highest strength values in its class, along with excellent radiopacity and great shade matching compared with other universal-shade composites. Designed for efficient placement, its syringes and application tips help minimize voids, a benefit confirmed by radiographic analysis of filled syringes and attached tips after dispensing of material. Viscosity testing reveals that the material offers a low-flow, no-slump consistency that allows precise cusp build-up and detailed anatomical sculpting. While the material is available in two flowabilities (Low and Super Low) in Europe, Super Low  is the variant offered in the United States and tested in the Dental Advisor Biomaterials Research Center.

3. KATANA™ Cleaner

KATANA™ Cleaner became a 2026 Research Award winner without prior clinical evaluation. The universal cleaning agent contains MDP salt, designed to effectively remove contaminants from both restorative materials and tooth structure. Laboratory testing by the Dental Advisor demonstrated that it restores bond strength on saliva-contaminated zirconia and lithium disilicate to optimal levels, with SEM analysis confirming nearly complete surface cleanliness. In its summary of research highlights, the Dental Advisor team stressed that KATANA™ Cleaner is one of the few commercially available cleaners approved for intraoral use.

4. PANAVIA™ Veneer LC (Research Award and Preferred Product)

PANAVIA™ Veneer LC is widely recognised for delivering strong, durable bonding and highly aesthetic outcomes in veneer procedures. Laboratory testing revealed that, when used with the US-recommended components – PANAVIA Veneer LC Paste, CLEARFIL™ Universal Bond Quick and CLEARFIL™ Ceramic Primer Plus – the system maintains a high bond strength even after artificial aging. This performance was consistent across multiple substrates, including enamel, dentin, silica-based ceramics (lithium disilicate) and zirconia. Furthermore, the system outperformed two other leading veneer cements in gloss retention and wear resistance.

TOP PRODUCT AWARD WINNERS

Top Products are “exceptional products [that] have consistently demonstrated their excellence and reliability, earning a lasting place in our publication“. The winners are selected based on laboratory testing and clinical evaluations conducted under real-life conditions: “Our dedicated volunteer evaluators provide unbiased insights from their real-world experiences, ensuring that only the very best receive this prestigious accolade”, as stated on www.dentaladvisor.com.

1. CLEARFIL MAJESTY™ ES Flow

A proven favourite, CLEARFIL MAJESTY™ ES Flow earned a Top Award for the 10^th time(!), reaffirming its position as a leading product in the direct restoratives category (Composite: Highly Filled Flowable). Recognized for its excellent handling, ease of use, and true-to-life aesthetics, it remains a trusted choice for clinicians seeking versatility and consistently high-quality results. Aesthetic properties were highlighted by one of the evaluators as follows: "The material blended so well with the tooth structure that you had to look hard to find the interface." 

2. CLEARFIL MAJESTY™ ES Flow Universal (Research and Top Product Award)

This product not only excels in the laboratory setting, but also in the practice environment. Among the top features highlighted clinically are its ideal, non-slumping consistency, optimised translucency and great blend-in ability supported by light-diffusion technology. The blend-in ability, along with the benefits resulting form the delivery system, are reflected in a comment: “Excellent shade matching and no air bubbles.”

3. CLEARFIL™ SE Protect

CLEARFIL™ SE Protect continues to set the standard among self-etch adhesives, combining antibacterial properties with fluoride release. Backed by a strong history of clinical success, it received a Top Award this year for its outstanding bonding performance and long-term reliability, making it a key component in modern restorative dentistry. An evaluator commented: "The gold standard in bonding to reduce post operative sensitivity."

4. PANAVIA™ SA Cement Universal

Designed for straightforward and dependable self-adhesive cementation, PANAVIA™ SA Cement Universal earned a Top Award for its high-quality bonding to a wide variety of substrates – without the need for additional primers. Its user-friendly handling and predictable outcomes make it a popular choice for clinicians who value both efficiency and performance. Evaluators highlighted its moisture tolerance as well as its "Amazing viscosity, tack cure-ability and very easy cleanup."

5. TEETHMATE™ DESENSITIZER

Awarded a Top Award for the nineth consecutive year, TEETHMATE™ DESENSITIZER continues to stand out for its exceptional effectiveness in managing hypersensitivity. This non-invasive solution remains highly regarded for delivering durable, long-lasting relief from sensitivity. Its long-lasting effect was confirmed in a comment: “At six months, the majority of patients continue to experience marked improvement from their pre-operative sensitivity or no sensitivity at all."

PREFERRED PRODUCT AWARD WINNERS

According to www.dentaladvisor.com, “The Preferred Product Awards highlight those items that not only excel in performance but also resonate with the needs of dental practitioners.“ Products are selected for this award based on clinical evaluations and in-vitro test results, and a preferred feature is always highlighted.

1. CLEARFIL™ Universal Bond Quick 2 (Research Award and Preferred Product)

Apart from winning a Research Award, CLEARFIL™ Universal Bond Quick 2 became a Preferred Product mainly for its rapid working time, enabled by a formulation with a unique blend of proven and new monomers. It allows clinicians to apply the adhesive and begin working instantly – a feature that is very well received by the consultants: "Extremely quick application time that allowed me to get right to work. Every time saving ability is ideal." Film thickness is low and application extraordinarily easy.

2. CLEARFIL™ CERAMIC PRIMER PLUS

The fact that it is a versatile, one-step solution made CLEARFIL™ CERAMIC PRIMER PLUS become a Preferred Product in the category Indirect Restoratives – Universal Primer once again. An evaluator was particularly happy that it is “Easy to use on a variety of materials”.  While highly versatile in application, the product also stands out for delivering exceptional bond strength – especially when applied to silica-based ceramics, zirconia, and composites. Its proven performance has made it a trusted choice among clinicians around the world.

3. PANAVIA™ Veneer LC (Research Award and Preferred Product)

PANAVIA™ Veneer LC’s preferred feature is its excellent handling, as stated by the evaluators. They liked to apply and model it, as it offered the desired combination of flowability, stability, viscosity and non-stickiness. While matching try-in pastes were well-received, one evaluator particularly highlighted the opacity of the white shade: ""

A SHARED FOCUS ON IMPROVING PATIENT CARE

At Kuraray Noritake Dental Inc., innovation is guided by a clear understanding of clinical realities. The awards received in 2026 reflect an ongoing commitment to developing materials that balance scientific excellence with practical usability – supporting predictable outcomes, efficient workflows and improved patient care. As dentistry continues to evolve, the recognition from the Dental Advisor underscores the importance of solutions that stand the test of time. By listening closely to clinicians and investing continuously in research and development, Kuraray Noritake Dental Inc. remains focused on advancing dental science in ways that matter most – supporting dental professionals in their striving for success and for enhancing their patients’ quality of life, every day.

Dentistry is evolving fast, and so are the expectations of patients and dentists. Nowadays, most dental practitioners know that different zirconia variants are available and that there are certain quality standards the selected material should meet to provide for aesthetic, functional and durable outcomes. Consequently, they often demand the use of a specific zirconia variant for their planned restorations.

Due to the widespread use of Tosoh zirconia in the market, however, many of these dentists are only familiar with the Tosoh 3Y / 4Y / 5Y zirconia terminology. This means that when prescribing a specific type of zirconia, they mention the desired yttria concentration. Unfortunately, this can create confusion in communication between dentists and dental laboratories: Not every zirconia brand and variant on the market fits into this Tosoh classification system.

KATANA™ Zirconia discs of Kuraray Noritake Dental Inc. are made of proprietary powders and advanced multi-layered technology developed in-house. The unique performance these blanks deliver cannot be simply described with the aid of the Tosoh system. Instead, we rely on the internationally recognized ISO 6872 classification — a standard that reflects clinical indications and material performance with precision.

WHY THE ISO 6872 CLASSIFICATION MATTERS

Unlike brand-specific powder classifications, ISO 6872 provides a clear, scientific, and globally accepted framework. It ensures that when a dentist prescribes a solution, or a technician selects a material, everyone speaks the same language – based on strength, translucency, and indication range. 

CONCLUSION

KATANA Zirconia is an advanced dental zirconia family that does not fit into standard boxes like 3Y, 4Y, or 5Y. It redefines what zirconia can do – blending beauty and strength with a scientifically validated ISO classification system. By embracing globally defined and accepted ISO 6872, we can contribute to peace of mind and eliminate confusion in the market.

Always follow Information for Use provided with the product and any other relevant local regulations.

A SMARTER GUIDE TO SELECTIVE DENTIN EXCAVATION

The modern approach to restorative dentistry emphasizes tissue preservation and clinical precision. Instead of extensive removal, today’s clinicians aim to conserve as much sound and remineralizable dentin as possible.

Caries Detector provides a simple yet effective way to achieve this precision by visually differentiating infected from affected dentin during caries excavation.

UNDERSTANDING THE DENTIN LAYERS

Dentin carious lesion is not homogeneous. It can be divided into two distinct zones:

• Infected dentin — irreversibly demineralized and heavily contaminated with bacteria; must be completely removed.
• Affected dentin — partially demineralized but capable of remineralization; should be preserved to maintain tooth vitality and strength.

The difficulty lies in identifying the exact transition between these two layers. Caries Detector facilitates this decision by providing a visual endpoint for excavation.

MECHANISM OF ACTION

Caries Detector selectively stains the infected outer dentin a vivid scarlet red while leaving the affected and sound dentin unstained.

This clear chromatic differentiation allows clinicians to identify residual infected tissue and avoid unnecessary removal of reparative dentin.

Depending on the clinical situation, the material can be used:

• In shallow cavities, prior to cavity opening for assessment.
• In deep lesions, following initial excavation to guide further selective removal while preventing pulpal exposure.

CLINICAL PROTOCOL

1. Preparation – After rubber dam placement, wash and dry the carious tooth.
2. Application – Place one drop of Caries Detector on a disposable brush and apply to the cavity.
3. Reaction time – Allow ten seconds for staining to occur.
4. Rinsing – Rinse thoroughly with water to remove excess dye and reveal the stained areas.
5. Selective removal – Excavate the red-stained infected dentin with a low-speed rotary instrument, avoiding the unstained tissue.
6. Verification – Repeat application if necessary to ensure complete removal of infected dentin.

The procedure yields a clean, sound dentin surface ready for adhesive bonding and restoration.

INTEGRATING WITH MINIMALLY INVASIVE RESTORATIVE WORKFLOWS

Caries Detector represents the first step in a conservative restorative protocol, aligning with the philosophy of minimum intervention dentistry (MID).

When combined with Kuraray Noritake Dental’s range of adhesive and restorative materials, clinicians can achieve:

• Controlled removal of infected dentin 
• Enhanced bonding to sound, remineralizable dentin
• Optimized aesthetic and long-term restorative outcomes

CONCLUSION

By translating histological principles into a practical chairside tool, Caries Detector allows clinicians to perform caries excavation with greater accuracy and confidence.

It supports minimally invasive principles, preserves tooth vitality, and lays the groundwork for durable, esthetic restorations.

Caries Detector — precision you can see.

Restorative dentistry continues to evolve — driven by smarter materials, refined techniques and a growing demand for streamlined solutions that do not compromise the outcomes.

In BOND 12 Magazine, we explore how modern ceramics, composites and adhesive technologies are shaping more efficient, predictable and aesthetic restorative workflows.

This latest issue brings together clinical expertise and material science, featuring inspiring case reports, expert insights and innovative techniques for both dental practitioners and dental technicians. Highlights include a tribute to Kiyoko Ban, a pioneer in dental technology, in-depth perspectives on the evolution of zirconia, and practical approaches to anterior and posterior restorations — from simplified composite layering to flowable injection and hybrid techniques.

Check out BOND Magazine Vol. 12 to discover the stories, techniques, clinical cases and ideas shaping contemporary restorative dentistry.

Start Reading: BOND | VOLUME 12 | 12/2025

Previous versions:

BOND | SPECIAL LAB SIDE EDITION | 07/2025

BOND | VOLUME 11 | 07/2024

BOND | VOLUME 10 | 10/2023

BOND | VOLUME 9 | 08/2022

BOND | VOLUME 8 | 12/2021

HOW TO OPTIMIZE ALL-CERAMIC RESTORATION BOTH AESTHETIC AND MECHANICAL?

A homogeneous porcelain structure, a strong bond between framework and veneering layer and a natural play of colours: All those characteristics of a high-quality all-ceramic restoration are not only strongly dependent on manual skills of the dental technician, but also on ideal firing conditions.

Only with a well maintained and properly functioning furnace and the right protocols, it is possible to obtain consistently great results in terms of aesthetics and function.

This is true for all kinds of all-ceramic restorations consisting of a framework and a veneering layer: It applies to full layering with a classical anatomical framework design and a relatively thick layer of porcelain, as well as to various cut-back designs finished using the modern micro-layering technique. A material that belongs to the latter category of porcelains and is becoming increasingly popular among dental technicians worldwide is CERABIEN™ MiLai (Kuraray Noritake Dental Inc.). The set of low-fusing porcelains and internal stains has been specifically developed for micro-layering, and works well with different variants of lithium disilicate and zirconia.

While the firing parameters provided by manufacturers like Kuraray Noritake Dental serve as reliable and thoroughly tested guidelines, experienced technicians often explore beyond these standards to achieve the highest possible aesthetic and functional outcomes.

This is precisely what MDT Nondas Vlachopoulos has done with CERABIEN MiLai.

Would you like to continue reading as a PDF? Please leave your email address below.

High-quality treatment is probably the most important element on the road to patient satisfaction. During every single appointment, the patient wants to feel well cared for by a skilled professional, while chair time and the number of appointments should be reduced to the necessary minimum. This implies that, in the context of prosthodontic treatment, a restoration needs to fit perfectly straight away and be stable over time to avoid remakes and extra appointments.

As explained in the first part of this series of articles, the quality of the selected prosthetic material – e.g. zirconia – has a decisive impact on the design, overall quality and long-term performance of definitive restoration. That is why you as a dental practitioner should

• order restorations that are produced domestically or in a region with the same standards as your own,
• know about the source of the zirconia your laboratory partner uses, and
• avoid deals that are too good to be true.

WHY ASK YOUR LABORATORY TO USE KATANA™ Zirconia

When quality matters, and you want to be sure that the zirconia restorations from your dental laboratory partner offer the desired mechanical and optical properties, requesting KATANA™ Zirconia can be a wise choice. This family of high-quality dental materials provides laboratories with everything they need to deliver restorations that you and your patients will appreciate, regardless of indication and no matter how unique the requirement. This is largely thanks to two factors: sophisticated multi-layered technology and a meticulous blank production process.

THE KEYS TO BRILLIANT AESTHETICS

Early zirconia materials often had a whitish, opaque appearance and were used mainly as framework materials. On the other hand, the dental zirconia used by dental laboratories today is typically pre-shaded and available in various levels of translucency. Some blanks even offer multi-layered technology: Recognising the importance of varying chroma and translucency in different areas of a natural tooth, Kuraray Noritake Dental Inc. has pioneered this trend. In 2013, the company became the first to introduce a blank with a polychromatic structure (KATANA™ Zirconia ML), featuring a natural gradient in chroma and a seamless transition between layers for a tooth-like appearance.

Initially developed for monolithic restorations, which are just polished or characterized with external stains and glazed, this new type of zirconia also inspired the micro-layering technique. Here, restorations are designed in full contour with only a slight cutback in the vestibular area, allowing for subtle porcelain effects that replicate the optical properties of enamel.

Continuous improvements of this first multi-layered zirconia generation ultimately resulted in the current zirconia portfolio offered by Kuraray Noritake Dental Inc. It consists of a multi-layered block for chairside milling machines, a classical framework material, and the KATANA™ Zirconia Multi-Layered discs series – even including a blank with flexural strength gradation:

Fig. 1. Four-layer colour structure of the KATANA™ Zirconia Multi-Layered series

KATANA™ Zirconia Block – Multi-layered block for chairside milling (available for CEREC and other chairside milling machines), with an 18-minute speed-sintering option* for natural tooth-coloured single restorations and short-span bridges.

^{*Speed-sintering option available only with compatible furnaces.}

KATANA™ Zirconia HT – High-strength zirconia for single-unit copings and long-span bridge frameworks, available in five different disc thicknesses.

KATANA™ Zirconia UTML – Ultra-translucent zirconia with a multilayered colour structure, ideal for monolithic anterior restorations including veneers.

KATANA™ Zirconia STML – Balanced translucency and strength for beautiful monolithic restorations, with natural colour gradation. This variant is ideal for crowns and up to three-unit bridges.

KATANA™ Zirconia HTML PLUS – High-translucency option with the strength needed for long-span bridges, offering vivid, natural colour.

KATANA™ Zirconia YML – Advanced zirconia with colour, translucency and strength gradation, featuring a strong body and highly translucent enamel layer for a virtually unlimited indication range.

THE KEYS TO HIGH-QUALITY RESTORATIONS

Zirconia quality depends on factors such as raw material purity, chemical composition, grain size and particle distribution. Every stage of production – from powder preparation to pressing and pre-sintering – affects the final mechanical and optical properties. Kuraray Noritake Dental Inc. optimises each of these steps to achieve consistently high quality.

1. RAW MATERIALS

Unlike most manufacturers who purchase pre-fabricated powders (from partners like Tosoh Corporation), Kuraray Noritake Dental Inc. produces all components in-house, including zirconium oxide, yttrium oxide, aluminium oxide, and those elements forming the company’s proprietary multilayer technology. This innovative technology is used to form a polychromatic blank structure and – in the case of KATANA™ Zirconia YML – additional translucency and flexural strength gradation.

Fig. 2. Powder for KATANA™ Zirconia

BENEFITS

• Natural translucency
• Shades matching VITA classical A1-D4™ shade guide concept
• Well-balanced flexural strength
• Precise millability for outstanding fit
• High ageing resistance
• Predictable sintering performance

2. PRESSING

A uniform density distribution throughout the blank and homogeneous material structure are essential for predictable processing outcomes and accurate fit. Kuraray Noritake Dental Inc. uses a unique pressing process that is designed to create even pressure distribution, minimise airborne particle contamination and reduce gravitation forces. This results in the desired purity and density of the zirconia blanks.

BENEFITS

• Uniform mechanical and optical properties
• Outstanding edge stability
• High surface quality
• Controlled sintering deformation

3. PRE-SINTERING

Pre-sintering gives pressed blanks the stability needed for milling. The selected temperature profile and duration of the pre-sintering cycle determine the material’s strength and hardness and processing properties, and have an impact on the final sintering process. The procedure used by Kuraray Noritake Dental Inc. results in blanks that are stable yet easily machinable with standard diamond-coated tools, without increased breakage risk or excessive tool wear.

Fig. 3. Restoration margins have been milled to a very thin profile, and yet they still show smooth margins without any chipping

BENEFITS

• High surface quality after milling
• Shorter sintering times possible (54 minutes for single tooth restorations and bridges with up to three units made of KATANA™ Zirconia UTML, STML, HTML PLUS or YML; 18 minutes in the case of KATANA™ Zirconia Block)

EVERYTHING YOUR LABORATORY PARTNERS NEED

Whether your partners in the laboratory prefer to work with different zirconia variants tailored to specific needs or a single material for all indications, whether they prefer full porcelain layering or simplified finishing techniques: KATANA™ Zirconia delivers the versatility needed – with a consistently high quality aimed at exceeding expectations.

Knowing this – and knowing how to distinguish high from poor quality zirconia materials – allows you to contribute significantly to the high quality of the prosthetic work produced in the dental laboratory. If you then also establish a well-structured, standardized and bidirectional flow of information maintaining records between practice and laboratory (e.g. by using checklists or a digital platform), all members of the restorative team are able to perform at their best for predictable treatment outcomes and long-term success.

COMPLEMENTARY PRODUCTS FOR THE DENTAL PRACTICE

Regarding the remaining clinical steps like the successful cementation of the delivered zirconia restorations, Kuraray Noritake Dental Inc. is a trustworthy partner, too: As well as offering complementary products for polishing, staining, glazing and veneering of zirconia restorations, the company is also a leading provider of clinical products such as resin cements, adhesives and cleaning agents. KATANA™ Cleaner, for example, can be applied both intra-orally and extra-orally, removing contamination from the bonding surfaces (tooth and restoration) after try-in. Applied to the pre-treated surface directly after cleaning, high-performance resin cement systems like PANAVIA™ V5 establish a strong bond to tooth structure and zirconia (as well as other restorative materials), so that high success rates are achieved even with partial restorations that offer minimal macro-mechanical retention1,2. Finally, if modifications are needed, TWIST™ DIA for Zirconia is a great option. It is suitable for polishing intra-orally and delivers a natural surface gloss. The products are well aligned and designed to complement each other for smooth workflows and outstanding results.

Literature

1. Blatz MB, Alvarez M, Sawyer K, Brindis M. How to Bond Zirconia: The APC Concept. Compend Contin Educ Dent. 2016 Oct;37(9):611-617; quiz 618. PMID: 27700128.
2. Alqutaibi AY, Alghauli MA, Almuzaini SA, Alharbi AF, Alsani AA, Mubarak AM, Alhajj MN. Failure and complication rates of different materials, designs, and bonding techniques of ceramic cantilever resin-bonded fixed dental prostheses for restoring missing anterior teeth: A systematic review and meta-analysis. J Esthet Restor Dent. 2024 Oct;36(10):1396-1411.

Article by doctors Tom Boujenah and Olivier Boujenah.

KEEP IT SIMPLE WHILE MEETING THE PATIENT’S INDIVIDUAL DEMANDS

Every day in our practices, we are faced with a choice between different treatment options. Experience, scientific literature, and patient preferences all help guide us toward one direction or another.

The case presented below could have been managed using a different approach, but the chosen solution aligned with our philosophy: keep it simple while meeting the patient’s individual demands.

A PATIENT WITH HIGH AESTHETIC DEMANDS

A young patient, in his early twenties, presented for consultation with a purely aesthetic concern. He had been wearing a double-retainer resin-bonded fixed dental prosthesis (Maryland bridge) (Figure 1) for several years, placed due to the congenital absence of the mandibular central incisors. Although the bridge had served him well functionally, the patient now wished to replace it with a more aesthetic solution, better matching the current shade of his natural teeth. After clinical and radiographic assessment, several treatment options were considered, taking into account the patient’s age, bone volume, and aesthetic expectations.

The final decision was to fabricate a new resin-bonded bridge, optimized in terms of both design and shade, using a multilayered zirconia to achieve a natural-looking result.

Fig. 1. Initial situation

Fig. 2. iTero 5D+ optical scan

PRELIMINARY STEPS IN THE DENTAL OFFICE

A pre-treatment impression of the bridge was taken before removal, using the iTero 5D+ scanner (Align Technology; Figure 2). These pre-treatment scans, which are performed almost systematically for our prosthetic reconstructions, allow the laboratory to capture the volume of the existing prosthesis, replicate the previous shape (if suitable), and often visualize wear facets. This helps minimize or even eliminate the need for subsequent adjustments. Then, the existing resin-bonded bridge was removed, and the abutment teeth were prepared as minimally invasive as possible. Once again, the intraoral scanner was used to take an impression of the situation (Figure 3).

Fig. 3. Impression after bridge removal and minimal preparation of the lingual surfaces

PRODUCTION OF THE RESIN-BONDED BRIDGE

The scan was sent directly from the intraoral scanner to the Design4me platform (a 3D design platform) to carry out the digital design of the planned bridge (Figures 4 and 5). A repositioning key was also designed by the dental technicians to provide for accurate seating of the bridge during cementation (Figure 6). The material of choice was KATANA™ Zirconia YML, a multi-layered zirconia from Kuraray Noritake Dental Inc., shade B1. It seemed most appropriate due to its outstanding physical and aesthetic properties—specifically its gradient in shade translucency and flexural strength (Figure 7).

Fig. 4. Design of the new bridge using exocad software (Design4me platform)

Fig. 5. View of the soft tissue underneath the bridge showing slight gingival compression

Fig. 6. Repositioning key designed using exocad software (Design4me platform)

Fig. 7. KATANA™ Zirconia YML disc (shade shown not representative of the case presented)

The production centre, DIGISMILE, subsequently received the STL files of the bridge and the positioning key, modeled by the dental technicians on the Design4me platform, ready for milling and printing. We also provided the laboratory with intraoral photos to replicate the surface texture, possible characterizations, and shades. The laboratory performed the milling of the bridge using a DWX-52D milling machine (Roland DG). Polishing, surface finishing, and staining were carried out using Komet burs and Miyo liquid porcelain (Jensen). The repositioning key, meanwhile, was 3D printed with a NextDent 5100 3D Printer (3D Systems) using surgical guide resin (Figure 8).

Fig. 8. Milled bridge and 3D-printed key after polishing and staining

DEFINITIVE PLACEMENT IN THE DENTAL OFFICE

The adhesive cementation procedure is one of the most critical steps of the whole workflow. Once the bridge had arrived in the dental office and try-in was successfully completed, the focus was on moisture control and the establishment of ideal bonding conditions. In this context, strict working field isolation with saliva ejectors, cotton rolls, and ideally a rubber dam is essential, followed by the pre-treatment of the abutment teeth and the retainer wings of the zirconia bridge.

PRE-TREATMENT OF THE TOOTH STRUCTURE

Since the tooth preparations are strictly limited to enamel, the following conservative bonding protocol was adopted:

• Etching with phosphoric acid for 30 seconds on the enamel surfaces.
• Thorough rinsing with water, followed by gentle drying without desiccating the enamel.
• Application of PANAVIA™ V5 Tooth Primer (Kuraray Noritake Dental Inc.), followed by thorough drying with mild air after a 20-second waiting time. This primer contains MDP, which is essential for reliable enamel/zirconia adhesion.

PRE-TREATMENT OF THE ZIRCONIA WINGS OF THE BRIDGE

Even though the intaglio surface was sandblasted in the laboratory, it is crucial to repeat this step in the clinic:

• Cleaning with KATANA™ Cleaner (Kuraray Noritake Dental Inc.) for 10 seconds or ultrasonic cleaning for 5 minutes, followed by rinsing with water.
• Sandblasting with 50 μm aluminum oxide (Al2O3) at 2 bar.
• Application of CLEARFIL™ Ceramic Primer Plus (Kuraray Noritake Dental Inc.) to the intaglio surface without rinsing, followed by gentle drying. This primer also contains MDP, providing for a proper chemical bond to zirconia.

ADHESIVE CEMENTATION

With all surfaces pre-treated appropriately, adhesive cementation proceeded as follows:

• Application of PANAVIA™ V5 Paste (universal shade A2) to the intaglio of the bridge.
• Insertion of the bridge using the repositioning key.
• Light curing (“tack” cure) for 3 to 5 seconds to stabilize the restoration.
• Removal of excess resin cement with a dental explorer. Alternatively, excess may be removed immediately with a soft brush before applying to light cure for the margins.
• Final complete light curing according to the manufacturer’s instructions (Figures 9 and 10).

Fig. 9. Clinical situation captured immediately after cementation

Fig. 10. Lateral view of the restoration immediately after cementation

TREATMENT OUTCOME

Thanks to the pre-treatment scan and the overlay of the old bridge with the new one, no adjustments were necessary, although occlusion control remained essential. At a recall after 18 months, gingival integration was satisfactory: The patient was able to use interdental brushes and maintain the prosthesis properly (Figures 11 and 12).

Fig. 11. Clinical situation 18 months after definitive placement

Fig. 12. Lateral view at 18 months

CONCLUSION

In this clinical case, the choice to produce a double retainer resin-bonded bridge, almost identical in design to the previous one, may seem conservative. However, this decision is supported by several factors: The patient’s good tolerance of the previous prosthesis, the tissue integrity of the abutment teeth, and, most importantly, the opportunity to significantly improve aesthetics thanks to advances in materials and bonding techniques, which allowed us to keep preparations minimal and minimally invasive.

This new bridge, designed with highly aesthetic multilayer zirconia and bonded using a strict protocol, achieved a perfectly integrated and natural result without resorting to more invasive options (therapeutic gradient). Furthermore, this approach invites the restorative team to consider emerging trends in resin-bonded bridge design, notably the option of two single-retainer cantilever bridges, which might be considered in similar cases in the future.

This case highlights the importance of individualized treatment planning, which does not rely solely on innovation, but on precise clinical assessment, attentive listening to patient needs and expectations, careful implementation of available tools, and the use of high-quality materials and protocols.

Dentists:

OLIVIER BOUJENAH

Dr. Olivier Boujenah earned his Doctorate in Dental Surgery from Paris V in 1994 and a University Diploma in Maxillofacial Surgical Rehabilitation from Paris VII in 2008. A pioneer in digital dentistry, he founded DIGISMILE, a training center and fully digital laboratory, and DIGISMILE LAB, dedicated to prostheses and surgical guides. He teaches in the Master’s program in Digital Dentistry at the University of Geneva and has pursued advanced training at Harvard University in digital workflows and guided surgery.

TOM BOUJENAH

Dr. Tom Boujenah graduated from the European University of Madrid in 2023 and completed a University Diploma in Oral Implant Rehabilitation at the Pitié-Salpêtrière Hospital in Paris. Based in private practice in the 16th district of Paris, he focuses on aesthetic and functional oral rehabilitation with a particular interest in implant dentistry and digital workflows. Passionate about innovation, he integrates the latest advances in implantology, prosthodontics, and digital dentistry to deliver personalized and long-lasting treatments.

ACHIEVE CONSISTENT, NATURAL-LOOKING RESTORATIONS WITH CONFIDENCE

Shade selection is one of the most critical steps in restorative dentistry — and one of the most challenging. The KATANA™ Zirconia Shade Selection Guide provides practical, evidence-based recommendations to help clinicians and technicians achieve predictable, lifelike results every time.

Inside, you’ll find clear guidance on how abutment color, restoration thickness, milling and sintering conditions, and finishing methods influence the final shade outcome. Backed by Kuraray Noritake Dental’s expertise, this guide is designed to simplify your decision-making, minimize remakes, and support optimal aesthetics across different workflows.

Download now and equip your practice or lab with proven strategies for shade selection success.

High-quality dental zirconia is crucial in prosthodontic treatments to ensure patient satisfaction and long-term success. The use of high-quality zirconia helps in achieving perfectly fitting restorations that are both aesthetically pleasing and durable, minimizing the need for remakes and extra appointments. Low-quality zirconia, however, can lead to various issues such as poor optical properties, improper fit, and inferior biocompatibility, which may go undetected until they cause clinical problems like gingival recession or early restoration failure. Therefore, selecting high-quality zirconia with the right composition, followed by correct processing, is essential for optimal outcomes in dental restorations.

THE DEVELOPMENT OF DENTAL ZIRCONIA

In the late 1990s, the first CAD/CAM-fabricated Zirconia coping was launched as an alternative to the non-aesthetic metal substructure, providing a strong and more aesthetic framework for porcelain-fused restorations. More recent developments in zirconium oxide have led to a shift from full-baked to monolithic use. This has largely overcome mechanical complications such as chipping and delamination and at the same time avoiding the need for the preparation of much of the tooth structure. Leading to prosthetic restorations that retain as much of the structure as possible.

Dental zirconia has traditionally been manufactured mainly from the tetragonal zirconia crystals with a minor proportion of approximately 3 mol% yttria stabilizer (3Y-TZP); this type is extremely strong but has low translucency.¹ By increasing the amount of yttria added to zirconia to around 5 mol%, the translucency is significantly improved because of the presence of a higher amount of zirconia crystals in the cubic form. This zirconia material is often referred at as 5Y-partially stabilized zirconia (5Y-PSZ). However, this increase in translucency comes at the cost of a decrease in mechanical strength.² The introduction of multi-layered zirconia by Kuraray Noritake Dental Inc. marked a significant advancement in zirconia technology, paving the way for highly aesthetic monolithic restorations. The development of a more aesthetic zirconia resulted in a steep decline of metal-ceramic usage in favour of ceramic prostheses. Nevertheless, there are still concerns about the quality of zirconium oxide prostheses. Not only about adhesiveness, but also about fit and processing. Several clinical reports show outcomes with high success rates up to 97% over more than 15 years.² However, there are also reports showing catastrophic failures of zirconia dental restorations. Let’s look at a very important root cause of these failures; the processing procedure.

ALTHOUGH ALL ZIRCONIA BLANKS MAY LOOK SIMILAR, QUALITY AND PROPERTIES CAN DIFFER WIDELY AS THEY ARE AFFECTED BY:

✓ The quality of the raw materials

✓ Raw material processing

✓ Blank pressing

✓ Pre-sintering

OVERVIEW OF POTENTIAL PROBLEMS AND CLINICAL CONSEQUENCES FOR PATIENTS

ROOT CAUSES OF ZIRCONIA FAILURES

Failures in zirconia restorations can often be traced back to the processing procedures used before the materials reach dental clinics. Most dental manufacturers source their zirconia powder from third-party suppliers, giving them limited control over the quality of the material they receive. Zirconia milling blank manufacturers typically press the raw powders, into disks around 100 mm in diameter, which are then pre-sintered to add mechanical stability. The exact formulations of these blanks are often proprietary and not disclosed. Variations during the disc pressing process can introduce air voids and impurities, negatively impacting the quality of the final restorations.² Dental laboratories further process these blanks by milling them into final shapes based on the 3D profiles provided and then sinter them at temperatures above 1,400°C to achieve the desired final phase. Each blank is designed with an enlargement factor to account for shrinkage during sintering. However, detailed processing procedures, such as milling and finishing, are often typically unavailable. As a result, the exact chemical composition, microstructure, and processing of zirconia materials for dental applications varies significantly depending on the manufacturer and laboratory involved. These variations make the production of zirconia restorations a complex and often unpredictable process.

Kuraray Noritake Dental Inc. is one of the few manufacturers handling the entire dental zirconia production process, including raw material processing, in-house. This end-to-end control allows us to ensure exceptional product quality across all materials. A core principle of Kuraray Noritake is the of a higher amount of zirconia crystals in the cubic form. This zirconia material is often referred at as 5Y-partially stabilized zirconia (5Y-PSZ). However, this increase in translucency comes at the cost of a decrease in mechanical strength.² The introduction of multi-layered zirconia by Kuraray Noritake Dental Inc. marked a significant advancement in zirconia technology, paving the way for highly aesthetic monolithic restorations. The development of a more aesthetic zirconia resulted in a steep decline of metal-ceramic usage in favour of ceramic prostheses. Nevertheless, there are still concerns about the quality of zirconium oxide prostheses. Not only about adhesiveness, but also about fit and processing. Several clinical reports show outcomes with high success rates up to 97% over more than 15 years.² However, there are also reports showing catastrophic failures of zirconia dental restorations. Let’s look at a very important root cause of these failures; the processing procedure. seamless integration of quality performance and ease of use, backed by a strong commitment to providing the right materials and support. As the producer of KATANA™ Zirconia, Kuraray Noritake’s meticulous oversight at every stage of production guarantees consistent quality, enabling us to confidently stand behind the excellence of our products.

KATANA™ PRODUCTION

All our zirconia offerings begin their journey to the dental lab in our Japanese facility where raw zirconia ore is processed to a high quality raw powder. Several delicate treatments are done as next steps, including the addition of several fine-tuned essential components like stabilisers and binders. Kuraray Noritake Dental Inc. benefits from in-house production of the raw materials required for dental zirconia. This provides the perfect base on which to use our multi-layering technology and add any other elements needed to create superior quality and purity of the formulation as well as a precise alignment of the desired properties.

From powder to blank pressing, Kuraray Noritake Dental Inc. uses a unique and highly meticulous pressing process that provides for absolute uniform pressing distributions. Every detail is carefully calculated, managed, and controlled. This phase of the process takes several days, underscoring our goal to achieve the most aesthetic product. The results are uniform mechanical and optical properties, outstanding margin stability, high surface quality and a very controlled sintering deformation. By removing the variables for the dental lab, KATANA™ Zirconia provides a reliable material that will give you the same result, every single time.

In the final stage of production, as our KATANA™ Zirconia blanks are prepared for packaging, each disc undergoes a meticulous manual quality check. This last, hands-on inspection ensures that every KATANA™ Zirconia disc meets the highest standards of excellence that we promise. By giving each disc this personal  attention, we guarantee that the quality and performance of our products consistently exceed expectations, reflecting our unwavering commitment to perfection in every detail.

Kuraray Noritake Dental Inc’s state-of-the-art production facilities enable us to create highly stable pre-sintered blanks with precisely the right rigidity to withstand all kinds of milling. This stability makes KATANA™ Zirconia a product that can be fully used without braking in situations where a large part of the disc already has been milled. Something that frequently occurs with lower quality products that are less strong in green-state. This highly stable quality also makes it possible to shorten the sinter time on KATANA™ Zirconia discs up to 54 minutes for single tooth restorations and bridges with up to three units.

NATURAL COLOUR GRADIENT

Kuraray Noritake is well aware of the importance of varying levels of chroma and translucency in various parts of a natural tooth. Our aim has been to mimic this effect even without the use of porcelain layering. In areas where the dentin core is revealed, a tooth is highly chromatic and rather opaque. In contrast, those parts of a tooth mainly composed of enamel – such as the incisal edge - are highly translucent and have a low chroma. Our patented KATANA™ Zirconia multi-layered technology has been developed to precisely imitate this gradient in chroma and translucency and shows a virtually seamless transition between layers, resulting in a tooth-like appearance without the need for porcelain layering. The four types of multi-layered KATANA™ Zirconia (UTML, STML, YML* and HTML PLUS) have a four-layer colour grading structure. The optical outcome is revealed immediately after sintering.

THE LATEST DEVELOPMENT IN ZIRCONIA

Our commitment to quality performance and ease of use is at the heart of everything we do. In line with these core values, we have pushed the boundaries of dental zirconia technology with our latest innovation: KATANA™ Zirconia YML for flawless aesthetics combined with high strength. In this revolutionary design we developed a multi-layered zirconia with additional flexural-strength and smooth translucency gradation; KATANA™ Zirconia YML.

Furthermore, all KATANA™ Zirconia YML discs are designed using ratios rather than fixed measurements of different layers in the multi-layered structure, this means that regardless of the disc’s thickness, there is always a consistent ratio of 35% of raw material that constitutes the translucent enamel zone. Hence, discs with an increased height, which are typically used to produce larger restorations, will always offer sufficient space in the enamel zone, while smaller discs are optimized for smaller restorations.

THE DESIGN CHOICES MADE ON KATANA™ ZIRCONIA YML GREATLY ENHANCES THE ADVANTAGES FOR THE LAB TECHNICIAN

✓ The ratio design offers design flexibility due to strategic layering.

✓ The accurate reflection of colour and translucency reduce the need for extensive finishing.

✓ Stable CTE throughout the disc allowing to produce high precision full arch restorations.

✓ Uniform, void free and high green-state stability for higher nesting flexibility thus higher output.

✓ Relatively high hardness in the green state, for easy green-state modification and fine tuning without the risk of fracturing or chipping.

✓ The hardness also allows for milling thinner restorations including sharp margins, thereby improving marginal fit.

✓ The part of a prosthesis from the body layer of KATANA™ Zirconia YML can be adjusted thinner than that of other high translucency zirconia, resulting in higher translucency in the body part.

MARGINAL STABILITY AND ENHANCED FITTING ACCURACY

KATANA™ Zirconia YML shows sharp margins and less chipping , thereby leading to better marginal fit. Thinner restorations show that this good result in sharp margin supports the use of KATANA™ Zirconia YML.

Even if the restoration margins have been milled to a very thin profile, they still show smooth margins without any chipping.

EVERYTHING THE LAB NEEDS

Kuraray Noritake offers four different types of multi-layered dental zirconia to cover every indication as well as a single-layer HT option to produce frameworks and long-span bridges. In the below chart you can view the range of recommended applications for all KATANA™ Zirconia Multi-layer discs.

CONCLUSION

The choice of dental zirconia significantly impacts the success of dental restorations, translating directly into daily practice for the lab technician. High-quality zirconia, such as that produced by Kuraray Noritake Dental Inc., ensures less cracking and chipping during the manufacturing process, reducing the likelihood of costly redoes due to fit or colour deviations. Superior quality of the zirconia powder, like those in KATANA™ Zirconia, allows for speed sintering, accelerating production without compromising the integrity of the restorations. Additionally, the advanced multi-layered zirconia designs, like Kuraray Noritake’s, reduce the need for extensive porcelain layering to achieve aesthetic results, streamlining the process, and enhancing efficiency.

Kuraray Noritake’s stringent quality control, with its end-to-end in-house production, guarantees consistent and reliable zirconia products. The all-rounder KATANA™ Zirconia YML, designed using precise ratios rather than fixed measurements, offers greater flexibility in design and nesting, ensuring consistent quality across varying restoration sizes. By selecting high-quality zirconia with meticulous quality control, dental labs can achieve optimal outcomes in both performance and aesthetics, ultimately benefiting both technicians, dentists, and patients.

REFERENCES

1. Yarahmadi M., Roa J.J., Zhang J., Cabezas L., Ortiz-Membrado L., Llanes L., Fargas G.; Micromechanical properties of Yttria-doped zirconia ceramics. Journal of the European Ceramic Society, Volume 43, Issue 7, July 2023, Pages 2884-2893.
2. Liao, Y., PhDa, Gruber, M. BSEa ; Lukic H., BSEa; McLees J., CDTb ; Chen S., PhDc ; Boghosian A., DDSd ; Megremis S., MS, PhDa; Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratories. Journal Reprint Line (2023) 2, 100018

TEETHMATE™ DESENSITIZER RECOGNIZED AS TOP PRODUCT YET AGAIN

Dental Advisor has recognized TEETHMATE™ DESENSITIZER as a Top Product in the category of Hygiene – Desensitizer yet again. This year’s recognition – the eleventh in a row (2015 – 2025) – was announced in the January/February 2025 issue of the publication. TEETHMATE™ DESENSITIZER allows an effective non-invasive approach to the treatment of hypersensitivity – a painful condition that generally occurs when dentinal tubules are exposed – when used as directed by dental professionals.

HOW IT WORKS

TEETHMATE™ DESENSITIZER is designed to crystalize hydroxyapatite (HAp), a mineral that is naturally found in enamel and dentin, and is the human body’s strongest material. When applied to exposed, mechanically treated, or freshly prepared dentin, the calcium phosphate-based mixture blocks the exposed tubules and provides immediate pain relief. During setting, HAp is formed, providing for long-term prevention of hypersensitivity. Further, when used in the context of restorative treatment, TEETHMATE™ DESENSITIZER does not have a negative effect on the bond strength of subsequently utilized dental adhesives or cements.

BENEFITS IN A NUTSHELL

TEETHMATE™ DESENSITIZER is a versatile solution providing hypersensitivity relief independent of the cause. It is perfectly suited for

• Treatment of dentin exposed by toothbrush abrasion, gingival recession, periodontal disease and/or acid erosion.
• Treatment of dentin after mechanical tooth cleaning, scaling and/or root planing.
• Treatment of the tooth surface before and after bleaching.
• Treatment of prepared dentin for fillings and/or prosthetic restorations.

The use of the product is also beneficial as it is

• Easy to mix and apply.
• Proven to be effective.
• Tissue-friendly and highly biocompatible.

OUTSTANDING CLINICAL PERFORMANCE RATING: 96 PERCENT

In a clinical evaluation, the Dental Advisor consultants found TEETHMATE™ DESENSITIZER effective in providing hypersensitivity relief immediately following and for up to six months after application. The study evaluated 27 patients diagnosed with gingival recession-related hypersensitivity, which was diagnosed using thermal testing with cold air. For the initial assessment, patients were asked to evaluate their level and frequency of hypersensitivity per tooth on a five-point scale. They were questioned about their level of sensitivity immediately after TEETHMATE™ DESENSITIZER was applied, according to the instructions for use, and again six months later. At baseline, 91 percent of the patients stated that they had no or only mild, sporadic sensitivity, which was still the case for 85 percent after six months.

Among the consultants’ comments were

• “TEETHMATE DESENSITIZER is easy to apply and seems to provide consistent relief.”
• "At six months, the majority of patients continue to experience marked improvement from their preoperative sensitivity or no sensitivity at all."

As a result, the product received a clinical performance rating of 96 percent.

ABOUT DENTAL ADVISOR

The Top Product and Preferred Product Awards from Dental Advisor, a US-based organization, were initiated to help busy practitioners navigate the variety of new dental solutions available, particularly for less invasive techniques and standardized procedures. These awards aim to identify products that improve outcomes consistently. Dental Advisor conducts clinical evaluations and product performance tests shortly after a product’s launch and publishes annual results online to help practitioners identify high-quality dental materials suited to their specific needs.

For more information, visit Dental Advisor at: www.dentaladvisor.com