Dumitru Leahu is the Head of Laboratory at Opal Atelier in Paris, France. A graduate of the Apollonia University (Romania), with a degree in Dental Technology (2021), Dumitru specializes in ceramic dental restorations and veneers on refractory, following the biomimetic concept while working with a variety of high-quality dental materials.

Dedicated to continuous skill development and research, he explores the full potential of modern dental products to create restorations that closely mimic nature. Passionate about sharing knowledge, Dumitru actively conducts international courses, fostering professional exchange and contributing to the global dental community.

With a strong commitment to advancing the field, Dumitru Leahu has authored two articles for Quintessence France Magazine on aesthetic ceramic restorations, as well as one article for DTG Magazine. Grateful for the support of colleagues and mentors, he remains focused on building a lasting legacy in dental aesthetics.

Dr. Manousos Pissadakis is a graduate of the National Kapodistrian University Dental School, Athens, Greece. He completed the Master of Science curriculum in Prosthodontics at the School of Dentistry of the Aristotle University of Thessaloniki, Greece. He also holds the ITI Certificate in Implant Dentistry – Foundation and Intermediate Level (ITI Curriculum, ITI section Greece and Cyprus). He has presented at numerous prestigious international conferences, focusing on subjects such as aesthetics, implant dentistry and prosthodontics.

Dr. Julien Molia graduated in 2008 with a thesis on computer-assisted implantology. He established a general dental practice in Saint-Jean-de-Luz, where he has since focused on implant surgery and jawbone reconstruction. In 2017, he completed a second university degree in implantology to update and deepen his expertise. He has also pursued advanced training in digital dentistry, orthodontic miniscrews, and mucogingival surgery. Committed to tissue preservation, he trained privately with Drs. Gil Tirlet and Jean-Pierre Attal in Paris. Dr. Molia is a founding member of the French Southwest BioTeam, a collaborative group dedicated to clinical research and innovation.

Ladislav Gregor is a prosthodontist at Sorriso Dental Clinic in Brno, Czech Republic. A Masaryk University graduate (2005), he later served at the University of Geneva and earned both a Dr. Med. Dent. (Geneva) and a Ph.D. (ACTA Amsterdam). He has published extensively in adhesive and reconstructive dentistry, lectures internationally, is a certified CADE member, and serves on the Scientific Council of the Czech Dental Chamber.

Tomas Forejtek is a dental technician in Brno specializing in aesthetic ceramic restorations. After graduating top of his class in 2001, he advanced to head of a leading dental laboratory and trained internationally with renowned mentors. In 2010, he opened his own lab, and since 2016 he has focused on single maxillary central incisor work with the eLAB protocol, becoming an official eLAB instructor in 2018.

After earning his Dental Technician Certificate from the Medical College in Minsk, Belarus, in 2014, Kostia began his career as a dental technician, focusing on aesthetic clinical cases that integrate the latest digital and manual technologies. Moving to Riga, Latvia, in 2015 greatly expanded his professional opportunities.

With over a decade of experience, Kanstantsin Vyshamirski now conducts courses, lectures, and seminars worldwide. He is a member of the DTG (Dental Technician Guild), a professional group of dental technicians based in the USA, and an invited guest of the AAED (American Academy of Esthetic Dentistry), an exclusive, invitation-only organization.

Operating his own lab in Riga, Latvia, Kanstantsin specializes in aesthetic prosthetic porcelain work and is an experienced, passionate user of KATANA™ Zirconia and Noritake porcelains.

Michał Jaczewski graduated from Wroclaw Medical University in 2006 and today runs his private practice in the city of Legnica, Poland. He specializes in minimally invasive dentistry and digital dentistry and is the founder of the Biofunctional School of Occlusion. Here he lectures and runs workshops with focus on full comprehensive patient treatments.

Leonidas Dimitriou was born in Athens, in 1968.

After graduating from dental technicians’ school in 1986, he continued his studies at the department of Dental Technology at the Technological Educational Institution of Athens. He graduated in 1990.

He has attended many top dental seminars and courses in Greece and abroad and he was influenced particularly by the contact with Gerald Ubassy in 1997.
Owner of the dental laboratory DENTECH since 1993, specializing in aesthetic and implant-supported restorations, and continues with the same passion to be trained in Greece and abroad following all the developments in dental field.

Since 2015 he collaborates with the Technological Educational Institute of Athens – department of dental technology- as a laboratory co-operator.
In 2015 his laboratory was chosen to be the cooperating laboratory for the practical training of the students to metal ceramics for the first semester of the Master of Science Degree in Dental Materials of Dental Technology (an operating program by the Departments of Dental Technology of the Technological Institution of Athens in conjunction with the Dental School of the National and Kapodistrian University of Athens). Since November of 2015, when the Noritake Greek Study Club was established, he is an active member and speaker.

Since January of 2017, after training in Japan by H. Aoshima, K. Yamada and N. Yuasa he is an official Noritake instructor.
In 2018 he starts to collaborate with the University of West Attica - School of Biomedical Sciences - Department of Dental Technology teaching ceramics and fixed prosthodontics as a laboratory co-operator.

For the last years he organizes advanced courses demonstrating Noritake ceramic materials in cooperation with Aesthetic Team and he is also lecturing in conferences and seminars.

In September of 2019 he is scheduling to attend a complete circle of advanced seminars in teeth morphology and ceramics in Osaka Ceramic Training Center.

Today Leonidas Dimitriou is doing what he loves and loving what he is doing, he tries to mimic nature and learn from it having in mind that pleasure is a product that returns to you to the extent that you produce it.

Vasilis Vasiliou was born in Nicosia, Cyprus, and graduated from the Technical School for Dental Technicians in Athens in 2004. He has furthered his education by attending several advanced seminars led by mentors and experts in the field, such as Ilias Psarris and Nondas Vlachopoulos.

Throughout his career, Vasilis has made significant contributions to the dental community, including presenting at various conferences in Greece and publishing articles in Greek dental magazines. Since 2020, he has been a key opinion leader for MPF Brush Company and, since 2022, a HASS Ambassador. Vasilis has been an active member of the International Team for Implantology (ITI) since 2019.

Together with his father, Vasilis runs a successful dental laboratory in Nicosia, specializing in all-ceramic and implant restorations. His extensive experience and commitment to excellence have established him as a respected professional in his field.

Dr Mediha Isikver is a graduate of the Ege University Faculty of Dentistry and the co-founder of Klinik M in Istanbul, Turkey. She focuses her professional practice on aesthetic and restorative dentistry, with particular expertise in composite laminate layering, porcelain laminates, and smile design. Believing that every smile tells its own story, she aims to create personalized aesthetic transformations that blend natural harmony with artistic detail.