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Some companies mainly make use of basic technologies developed by others to improve their products and introduce new ones, while other companies conduct fundamental research and basic technology development inhouse. Is this difference relevant for someone who uses the resulting products in the dental practice or laboratory on a daily basis? It is – as companies developing everything from scratch usually have a deeper understanding of the products and their production procedures, which makes it easier for them to modify specific features, solve existing problems and respond to market needs. This article describes the impact of two basic technologies developed by Kuraray Noritake Dental Inc. on the production of zirconia-based indirect restorations.

All-ceramic evolution

A milled monolithic or only minimally reduced core made of high-strength ceramics plus a micro-layer of porcelain: this is today’s success formula for the production highly aesthetic indirect restorations. The approach is by far less complex and time-consuming than traditional production and layering procedures, while its outcomes can be quite impressive. Concerning aesthetics and function, however, it is essential that the right types of material are selected and combined.

The core: Multi-Layered Zirconia Technology

When the first opaque zirconia framework materials conquered the dental market, leading manufacturers never grew tired of stressing that not all zirconia is alike. Instead, huge quality differences do exist depending on the raw materials selected as well as the processing techniques and equipment used for blank production. With an increasing aesthetic potential of the core materials and a decreasing thickness of the veneering porcelain on top, this fact becomes more relevant than ever.

When Kuraray Noritake Dental Inc. identified the need for more aesthetic zirconia core materials with a higher translucency and a tooth-like colour structure, it decided to develop a completely new type of dental zirconia. It started establishing a sophisticated raw material production, blank pressing and pre-sintering process inhouse. This was the basis for the development of the dental industry’s first polychromatic blank with a seamless colour structure and precise shade match with tabs of the VITA™ classical shade guide. In order to identify the best ingredients and procedures, the R&D team experimented with different raw materials, formulations and grain sizes, developed ways to optimize the purity of the ingredients and focused on perfectioning the homogeneity and density of the blanks and – of course – the integrity of the different layers. Currently, three different products based on this original Multi-Layered Zirconia Technology are available for dental laboratories: KATANA™ Zirconia UTML, KATANA™ Zirconia STML and KATANA™ Zirconia HTML PLUS. They offer different levels of translucency and flexural strength.

KATANA™ Zirconia Multi-Layered disc with four-layer colour structure.

Three different products with four-layer colour structure, differing in terms of translucency and flexural strength.

In June of 2021, Kuraray Noritake Dental Inc. introduced a new, next level Multi-Layered Zirconia disc – KATANA™ Zirconia YML. This time, the company responded to the marked need for a universal zirconia with a high aesthetic potential. The blanks offer colour, translucency and flexural strength gradation – with the highest translucency in the enamel and the highest flexural strength in the lowest body layer.

KATANA™ Zirconia YML: Multi-Layered Zirconia disc with colour, translucency and flexural strength gradation.

All Multi-Layered Zirconia discs and technology incorporated in them support the production of lifelike restorations with reduced hand work. No matter whether the user prefers to work with materials offering a uniform strength and selects them depending on the indication or with the universal solution: the finishing effort is reduced considerably due to the optimized translucency and natural colour gradation of the core materials. At the same time, the quality of the produced restorations is high thanks to regular margins, smooth surfaces and a precise fit (as a result of the homogeneous, high-density structure with low porosity and a high level of purity).

Extremely regular margins of a KATANA™ Zirconia crown after milling, which is also a result of the favourable material structure.

The micro-layer: Synthetic Feldspathic Porcelain Technology

Differences are not only found in zirconia, but also in the performance of veneering porcelains. They typically consist of feldspathic porcelain, and most of them are based on natural feldspar. Depending on where this feldspar is mined, it may have slightly different properties. That is why manufacturers of this natural feldspar-based veneering porcelains need to adjust their formulations from time to time, and handling and aesthetic properties might be somewhat different with every new system purchased. In the 1980s, these variations in the composition of natural feldspar led to unpredictable material properties causing difficulties in reproducing the natural tooth colour and even porcelain fractures and cracks appearing after firing of porcelain-fused-to-metal (PFM) restorations. A limited colour stability was also an issue.

For Noritake, one of the parent companies of Kuraray Noritake Dental Inc., these issues were reason enough to start developing a different kind of porcelain. After analysing the issues and weighing the possibilities, a completely new Synthetic Feldspathic Porcelain Technology was developed. It provides for stable coefficients of thermal expansion, particle distribution and colour, as it is no longer dependent on natural sources of feldspar.

Originally, this technology was used in Super Porcelain AAA (EX-3) introduced in 1987, a veneering porcelain for metal frameworks. However, the technology also formed the basis for the development of CERABIEN™ ZR Porcelain and CERABIEN™ ZR FC Paste Stain for porcelain layering on zirconia. This line-up of internal stains and porcelains was specifically developed for micro-layering on zirconia.

All products have one thing in common: as they are based on synthetic feldspathic porcelain, they offer consistent mechanical and handling properties and predictable shade effects. The material structure and particle distribution resemble those of natural teeth, supporting lifelike outcomes. A reduced effort is achieved with the liquid ceramic system CERABIEN™ ZR FC Paste Stain used on a monolithic restoration or one with a minimal cut-back (0.1 mm).

Different micro-layering approaches with CERABIEN™ ZR FC Paste Stain…

…and CERABIEN™ ZR Internal Stain plus Luster Porcelain leading to highly aesthetic outcomes.

Connecting elements: Touch-Cure and Monomer Technology

When needing to cement the finished prosthetic restorations on implant abutments or frameworks, it is essential to select a cementation system that is able to fulfil high aesthetic and functional demands. The PANAVIA™ family of resin cements from Kuraray Noritake Dental Inc. contains many different technologies that provide for a high bond strength to various substrates and a tight marginal seal. The key technology incorporated in any cement is the Original MDP Monomer invented by Kuraray in 1981. It is capable of establishing a particularly strong and long-lasting bond to enamel, dentin, metal and zirconia. The self-adhesive resin cement PANAVIA™ SA Cement Universal also contains the LCSi Monomer, a Long Carbon-chain Silane coupling agent. This monomer forms a strong chemical bond with resin composite, porcelain and silica-type ceramics (like lithium disilicate), so that the need for a separate silane component (a primer or adhesive) is eliminated when bonding these types of prosthetic restorations. PANAVIA™ V5, the strongest cement in PANAVIA™ line, is equipped with Touch-Cure Technology. It seals the interface between the tooth and the restoration to prevent micro-leakage, provides for a high polymerisation ratio even when dark-curing and hence delivers a strong bond in virtually every situation.

Conclusion

KATANA™ and CERABIEN™ are excellent partners that allow for a simplified approach to lifelike restorations. The high level of quality and reliable performance offered by the solutions are due to proprietary technologies and streamlined inhouse production procedures that really make a difference. And whenever needing to cement prosthetic restorations on implant abutments or frameworks, PANAVIA™ resin cement systems based on proprietary monomer and curing technology are a perfect choice.

- A commemoration of the company’s 10th anniversary –

We asked Mr. Sadaaki Matsuyama, who was then the president of Kuraray Medical, and Ms. Kiyoko Ban, who was then the company advisor of Noritake Dental Supply, about episodes that occurred during the business integration between their two companies.

What were your impressions of each other at that time?

Ms. Ban: I had known Mr. Matsuyama for about 10 years before the integration. When I first met him, I got the idea he was "scary," but as we talked I discovered we had a nice rapport. I finally came to the firm conclusion that he is a very pleasant person!

Mr. Matsuyama: We made some small talk when we met at exhibitions, and because we used the same distributors in Japan, we had many opportunities to talk to each other at New Year's parties and other distributors’ gatherings. She said that I looked "scary", but at first I felt that Ms. Ban looked quite tough (laughs). Later, I came to have the impression that she was someone with whom I could talk frankly.

What were your impressions of each other's companies before the integration?

Ms. Ban: Kuraray had entered the dental industry before Noritake did and they were well known in the field of dental adhesives. I respected them. We had something in common, in that we were both companies that had not specialized in dentistry, but were now doing business in this new-to-us field.

Mr. Matsuyama: Noritake occupies a high share in Japanese dental ceramics market and Kuraray occupies a high share in Japanese dental adhesives market, so neither company had a big lineup of dental products. Neither of us was a great big company doing extensive business in the dental industry. Still, it seemed to me that we both had outstanding, worldwide-recognized technological capabilities.

How did the two companies turn up with the idea of integration?

Ms. Ban: Actually, even before we began to consider the possibility of integrating, the topic of integration came up several times during casual chats among Kuraray staff. Later, when Mr. Matsuyama, who had been working in China, returned to Japan, I began to think that we would be able to draw up a more concrete global strategy if we worked together. Finally, when Mr. Matsuyama was appointed president of Kuraray Medical, I remember that a specific discussion of integration came up between the two companies.

Mr. Matsuyama: At that time, just as Ms. Ban said, Kuraray Medical was also seriously considering a global strategy. We were thinking, "We ought to get serious about expanding our business in the global market." From a global perspective, it was clear we needed to show our face on the world market. I also had the feeling that, to succeed at that, we had to add "something" to the company as it was, in order to achieve this global expansion. It was while I was still mulling this over that the topic of business integration came up, and I saw right away that we had no choice but to move forward with this. If we intended to expand our business further and advance more aggressively into overseas markets, I thought that the integration of Noritake Dental Supply, the number one company in "inorganic" materials and Kuraray Medical, the first in "organic" materials would have a global impact and that it would be very beneficial to both companies.

Ms. Ban: Before the integration, dental materials divisions of Kuraray and Noritake had worked together in the development of dental restoration system called CLAPEARL*. Kuraray made the cement and Noritake made the porcelains suitable for use with the cement. Kuraray and Noritake have had a pretty darned good relationship since that time.

*Limited to Japan, dental restoration system consisting of several components used for porcelain laminate veneer restorative treatments. Only its dual-cure cement was exported to some areas under the name of CLEARFIL™ DC Cement.

I think the two companies integrated with each other to enhance their respective strengths further and overcome their weaknesses. What did you expect specifically?

Mr. Matsuyama: What I expected from this integration was that our people, who had been engaged only with adhesive materials, would be able to get into the world of porcelain materials. Also, I thought they would be able to widen their perspective on their own dental materials business, including how they conducted that business, by being on the inside of another company in a related field. I thought this would hold true of the employees at both companies.

Ms. Ban: That's right. We used to only look at ceramics-related areas, but after the integration, we began to pay attention to new cement products, and so on. During the early days after integration, at the IDS (International Dental Show: one of the world's largest exhibitions in the dental industry), our ceramics products and our adhesive products were displayed separately in our booth. I remember even back then I thought this was bad. Now, at exhibitions, our products are displayed in one booth, with ceramics and cement products arranged together, so visitors can take a look at both types of products at the same time. I think things have improved a lot compared with how they were at the beginning.

At the time, there was a lot of talk about "synergistic effects" arising from the integration. What kinds of synergistic effects did you first see and experience? Was it what you expected?

Ms. Ban: At the first IDS held after the birth of Kuraray Noritake Dental, I really felt the synergy arising from the integration. When I got to our booth, without even fully realizing what I was saying, I exclaimed: "This splendid booth shows what we can achieve by getting together!" I felt as if a great new company had been born. Besides, another thing that I feel great about this integration is the issue of intellectual properties. We were able to learn a lot about intellectual property rights after integrating with Kuraray Medical, and I am very thankful for that.

Mr. Matsuyama: I think the first one of the synergistic effects we obtained from the integration was that we were able to market our products from a wider perspective. For example, now that we sell CAD/CAM materials or ceramic materials, we are able to suggest suitable cements for them, as well. Previously, we could only say, "This is what we do with ceramics, and (separately) this is what we do with cements." But now, we can suggest products to customers that make up a total dental restoration system. This makes it easier for customers to get the whole picture of what we have available for them to buy. I thought that this was where the synergies from the integration first showed up.

Ms. Ban: People who know Kuraray Medical or Noritake Dental Supply well, such as those who are in the dental industry, including dentists, all said it was a wonderful integration. They all congratulated us on our integration. Kuraray Medical had long been recognized as a reliable dental adhesives manufacturer, while Noritake Dental Supply also had been accepted by many people in the dental industry as an excellent manufacturer of dental ceramic materials. I think that because both companies had good images, their integration was perceived even more favorably.

REALITY NOW rates brand-new PAVANIA™ Veneer LC

Just launched and already tested: REALITY RATINGS & REVIEWS has published a FirstLook evaluation of the brand-new PANAVIA™ Veneer LC, a purely light-cured resin cement for the permanent cementation of veneers and thin inlays and onlays. Based on laboratory testing, they conclude that “PANAVIA Veneer LC appears to be a worthy addition to the PANAVIA dynasty of cements.” The PANAVIA™ Veneer LC kit available in Europe consists of PANAVIA™ Veneer LC Paste, PANAVIA™ V5 Tooth Primer and CLEARFIL™ CERAMIC PRIMER PLUS.

During testing, the product features that are verifiable in a laboratory setting delivered no surprise: PANAVIA™ Veneer LC Paste is very well polishable with the polishing systems used, and the working time turned out to be exactly as long as specified by Kuraray Noritake Dental Inc. According to the evaluators, this working time is more than sufficient. While other possibly beneficial features – wear resistance and colour stability – were not put to a test, the evaluators were enthusiastic about the product’s handling properties. Their opinion: “The material itself has very nice handling properties, allowing easy seating of veneers with virtually no rebound. It is also not runny (flow is 5), but at the same time, it is not overly thick that you risk fracturing an ultrathin veneer. In addition, its consistency facilitates loading a veneer and cleaning the excess with minimal to no stickiness.”

Equipped with these favourable features, PANAVIA Veneer LC clearly has the potential to make your life easier during veneer cementation. Try-in pastes are available, the shade offering (four shades) is more than adequate and its close relatedness with PANAVIA™ V5 (which share technologies and system components) lets you use the product with confidence right from the start.

To view the full evaluation visit www.realityratings.com

In the early 1990s, Kuraray introduced CLEARFIL™ LINER BOND 2, the first self-etching adhesive, to the world. Among the products that this system has led to is the award-winning CLEARFIL™ SE Protect, which was introduced in 2004 and remains highly valued by dental professionals across the world. By combining Kuraray Noritake Dental’s famed original MDP monomer with the antibacterial 12-methacryloyloxydodecylpyridinium bromide (MDPB) monomer, this self-etching adhesive is able to kill bacteria on contact. How is this possible? Let’s find out.

Pyridinium holds the key

The crucial element that provides CLEARFIL™ SE Protect with its antibacterial cavity cleansing ability is contained in the MDPB monomer. The pyridinium group in this monomer is positively charged, whereas the cell structures of bacteria are, generally speaking, negatively charged. This means that they are automatically attracted to the positively charged contact points of the MDPB monomer, causing these bacteria cell membranes to lose their electrical balance and be destroyed. This process—bacteriolysis—kills the bacteria.

The bactericidal mechanism of MDPB is presumed to be similar to that of the well-known antibacterial agent cetylpyridinium chloride, which is in many toothpastes and mouthwashes.

Certified biocompatibility

The MDPB monomer is immobilised during the polymerisation of the bonding and remains latently active without affecting the dental patient’s own cells. Unlike the situation when other cavity hygiene products are used, this process—patented by Kuraray Noritake Dental—does not have a negative impact on the bond strength and even ensures that there are no long-term cytotoxic effects on the patient’s own body cells such as odontoblasts. These results have been confirmed by the official biological evaluation for medical devices known as the ISO 10993 series.

Award-winning results with CLEARFIL™ SE Protect

With its antibacterial effect, high bond strength to enamel and dentine and long-term fluoride release, CLEARFIL™ SE Protect is reliable, versatile and future-proofed. This tried-and-tested two-step self-etching bonding system is fast and easy to use for direct restorations. For bonding indirect restorations and core build-ups, simply mix it with Kuraray Noritake Dental’s CLEARFIL™ DC Activator according to the instructions for use.

Thanks to its combination of MDP and MDPB monomers, CLEARFIL™ SE Protect leads to predictable, durable restorations—and it has received plenty of accolades from dental experts as a result. In 2022, this adhesive again received a Top Product Award in the Direct Restoratives, Bonding Agent: Self-Etch category from DENTAL ADVISOR. This was the fourth year in a row that it earned such recognition, and in addition, the 13 DENTAL ADVISOR consultants and editors gave CLEARFIL™ SE Protect a stunning 98% overall clinical rating.

Naujoviška „PANAVIA Veneer LC“ technologija

Šioje apžvalgoje aptariame technologijas ir tai, kaip jos prisideda prie daugelio naujojo „PANAVIA Veneer LC“ privalumų.

Testimonial article by Dr. Troy Schmedding, USA

From PANAVIA™ EX to PANAVIA™ V5, Kuraray Noritake Dental Inc.‘s flagship product line of cements continues to evolve to offer reliable adhesion, enhanced ease of use, and superior esthetics.

Dentistry has certainly evolved in the years since Kuraray Noritake Dental Inc. developed the phosphate monomer MDP. But over the past 4 decades, it has rooted itself in restorative dentistry as the tried-and-true ingredient that clinicians rely on for strong adhesion to tooth structure as well as metals and zirconia. MDP is a key ingredient in the manufacturer’s flagship PANAVIA™ line of cements, which continues to evolve in line with a growing variety of indirect restorative materials from which to choose.

One example of this evolution is PANAVIA™ SA Cement Universal, one of the first true universal self-adhesive resin cements to hit the market. In addition to the original MDP monomer, it incorporates the LCSi monomer, a silane-based carbon chain in a dual-barrel system that forms a chemical bond with glass and ceramic materials.

“PANAVIA™ SA Cement Universal allows you to achieve a strong bond no matter which substrate is being used.”

- Troy Schmedding, DDS –

A STRONG BOND THAT’S SIMPLE TO CREATE

But all chemistry aside, what’s in it for the clinician? As dental educator and author Dr. Troy Schmedding points out, the key benefit of PANAVIA™ SA Cement Universal is eliminating the confusion over how to treat different substrates. This is because the material adheres to virtually every material without the need for a separate primer. “The plus side for the practitioner is that the confusion of ‚how do I condition zirconia‘ or ‚how do I condition glass ceramics‘ is no longer an issue because the paste formulation allows you to achieve a strong bond no matter which substrate is being used - whether it is the MDP monomer allowing strong adhesion to zirconia or the LCSi monomer forming a chemical bond with glass ceramics,” he shared.

DIALING UP THE AESTHETICS

Kuraray Noritake Dental Inc. considers PANAVIA™ V5 the most esthetic cement it has ever created. Available in 5 shades - White, Brown, Universal, Clear, and Opaque – it took researchers over 10 years to develop and features an anime-free catalyst that allows for superior colour stability and improved bond strength to dentin. And like its predecessors, PANAVIA™ V5 offers a simple cementation procedure that is compatible with all indications, from crown-and-bridge and implant abutments to ceramic inlays and laminate veneers.

“Kuraray Noritake Dental Inc. has an incredibly strong reputation in adhesive dentistry, so it should offer clinicians a lot of comfort and flexibility to partner with not only a reputable company, but one that continues to research and evolve their key products,” concluded Dr. Schmedding.

Dentist:

DR. TROY SCHMEDDING, DDS
USA

Article from Dental product shopper, vol. 14 No. 5

Minimally invasive procedures using highly aesthetic restorations is what patients expect when they seek restorative treatment. With the various types of restorations available today, it is possible to meet these expectations – provided that the right materials are used.

For the placement of veneers, a resin cement must be selected that supports long-lasting aesthetics, is easily applied, offers a working time sufficient for simultaneous cementation of multiple restorations and provides excellent bond strength. The new “PANAVIA™ Veneer LC” is precisely what you need.

What is the workflow you ask? Check out the video to see the full workflow using PANAVIA V5 Primer and CLEARFIL Ceramic Primer Plus.

One of the key features when talking about cements is the ease of removal of excess cement. Our newest cement - PANAVIA™ Veneer LC - offers the ideal paste consistency, a low film thickness and long working time.

But how about excess removal? Do you wonder how do we compare to other similar products?

Check out this video demonstrating an excess removal comparison between PANAVIA Veneer LC and other brands.

PRESENTATION OF A STUDY WITH ILLUSTRATIVE CASES

by Dr. Yohei Sato, DMD, PhD and Dr. Keisuke Ihara, CDT.

INTRODUCTION

In recent years, the application and advancement of digital technology in dentistry has made it possible to accomplish the fabrication of highly accurate prosthetic zirconia appliances that were difficult to mill using the previously available technology. In addition, thanks to advances in adhesive dentistry and the advent of cements that bond strongly to a diverse range of materials, cements have come into wide clinical use that can cope with the many types of materials used for the fabrication of prosthetic appliances.

At our hospital, we select the treatment method most suitable for each case by appropriately specifying various types of prosthetic appliance according to the status of each case. For example, we may specify zirconia prosthetic restorations fabricated by the CAD/CAM system, or silica-based ceramic prostheses, or those made of lithium disilicate glass, as the case dictates.

PANAVIA™ V5 is a resin cement system that bonds strongly to various types of prosthetic appliance, as well as to tooth structure. PANAVIA™ Veneer LC, a new resin cement system developed by Kuraray Noritake Dental Inc., has suitable characteristics for bonding laminate veneers, using two types of primer that can be used in common with PANAVIA™ V5. Here are some clinical examples of its advantages as a resin cement system used for laminate veneers restorations.

NAUJI UŽPILDAI
„PANAVIA™ Veneer LC“ naudojimą palengvina naujai sukurti sferiniai silicio dioksido ir nanoklasterių užpildai (užpildo kiekis: 66 proc. pagal svorį, 47 proc. pagal tūrį). Dėl tiksotropinių savybių cementas nenuslenka ir nenubėga. Naudojant „Panavia Veneer LC“ cementą galima kontroliuoti aplikavimą. Cementas lieka toje vietoje, kurioje buvo įleistas, bet gerai pasiskirsto tekėdamas paviršiumi uždėjus laminatę (-es). Dėl savo konsistencijos ir plono išstūmimo sluoksnio (≈ 8 μm) „PANAVIA™ Veneer LC“ sukuria ploną, tolygų cemento sluoksnį. Tai lemia lengvą uždėjimą be jokių trikdžių. Be to, tik mažų sferinių užpildų naudojimas (dalelių dydis 0,05–8 μm) leidžia sukurti labai estetiškus ir lygius kraštus ir palengvina poliravimą, taip pat padeda ilgą laiką išlaikyti blizgesį

SILICIO DIOKSIDO UŽPILDAS
Dėl naujai sukurtų sferinių silicio dioksido užpildų cementas išlieka ten, kur naudojamas, bet gerai teka, kai dedama laminatė. Dėl to laminatę lengva uždėti, ji nepasislenka ir nenusmunka. Aplikuojant ant viso lipdomojo paviršiaus, dervinis cementas nelimpa prie aplikavimo antgalio – ši savybė pasiekta į sudėtį įtraukus sferinių nanoklasterių užpildų.

Šie naujo tipo užpildai užtikrina
puikų glotnumą, blizgesio
išlaikymą ir lengvą valdymą.

KLAMPUMAS IR TIKSOTROPIŠKUMAS
Cemento klampumas turi būti pakankamai mažas, kad apsaugotų protezą nuo lūžio uždedant. Kita vertus, jis turi būti ne per skystas, kad nenubėgtų aplikuojant ir dedant protezą. Kadangi užpildo ir dervos santykis „PANAVIA™ Veneer LC“ sudėtyje yra optimalus, jo klampumas kinta spaudžiant. Šis reiškinys vadinamas tiksotropija. Spaudžiant pasta laminatės uždėjimo ir pozicionavimo metu tampa skystesnė. Nustojus spausti, klampumas vėl padidėja. Dėl „PANAVIA™ Veneer™ LC“ tiksotropinių savybių pastą lengva dozuoti, protezui pozicionuoti reikia nedidelio spaudimo, o perteklių lengva pašalinti. Trumpai tariant, užtikrinama maksimali kontrolė..

Vienodo klampumo medžiagos nebūtinai bus vienodo tiksotropiškumo. Įtakos turi temperatūra ir spaudimas. Nuo medžiagos tiksotropiškumo priklauso, iki kokio lygio ir kokiu greičiu grįžta pradinis medžiagos klampumas sumažinus spaudimą.

NAUJOVIŠKA KIETĖJIMO TECHNOLOGIJA
„PANAVIA™ Veneer LC“ yra šviesoje kietėjantis cementas, kuriame derinamos kelios technologijos, užtikrinančios didžiausią įmanomą sukibimo stiprumą.

SUJUNGIMO PAVIRŠIAUS SANDARINIMAS
Pritaikyta lietimo sukietinimo („touch-cure“) technologija naudojama siekiant ilgesnio darbo laiko, bet kartu išlaikant didelį sukibimo stiprumą, kuriuo pasižymi „PANAVIA™“. „PANAVIA™ Veneer LC“ cementas, derinamas su „PANAVIA V5 Tooth Primer“ gruntu, suteikia šviesoje kietėjančiam cementui svarbų cheminį elementą. „PANAVIA™ V5 Tooth Primer“, kaip savaiminio ėsdinimo gruntas, skirtas danties struktūroms (dentinui ir emaliui), stipriai sukabina besijungiančius paviršius, kai tik su juo susiliečia „PANAVIA™ Veneer LC“ pasta. Ši švelni lietimo sukietinimo („touch-cure“) technologija inicijuoja
polimerizaciją surišamų paviršių sandūroje ir sukuria tvirtą sukibimą su emaliu ir dentinu, tačiau neturi įtakos cemento kietėjimui, taigi ir darbo laikui.

DARBO LAIKAS
Cementuojant įtakos darbo laikui turi daugybė išorinių veiksnių. Kuriant „PANAVIA™ Veneer LC“ technologiją į šiuos veiksnius atsižvelgta. Technologija „Touch-cure“ besijungiantį danties paviršių susandarina akimirksniu. Tai didelio sukibimo stiprumo pagrindas. Kietėjimo šviesoje technologija leidžia 200 sekundžių dirbti aplinkos šviesoje*, kol PVLC ima prarasti idealaus formavimo plastiškumą Per šias 200 sekundžių galite patogiai uždėti ir užfiksuoti kelias laminates. Galutinė polimerizacija įvyksta švitinant dentaliniu švitintuvu – tuomet cementas tinkamai sukietėja.

*Aplinkos šviesa: maždaug 8000 liuksų