Hakobyan Gagik1*, Tunyan Gegham2, Levon Khachtryan3, Nvard Vanyan4 and Davit Matevosyan1
1Department of Oral and Maxillofacial Surgery, Yerevan State Medical University, Armenia 2Yerevan State Medical University, Armenia 3Medical Center MIM (Medical Center of Maxillofacial and Plastic Surgery), Yerevan, Armenia 4Department of Prosthodontics, Yerevan State Medical University, ArmeniaFulltext PDF
Purpose: To evaluate the survival of implants, the success of prosthetics of implant-supported reconstructions based on monolithic zirconium dioxide, functioning up to 5 years. Patients and Methods: In this study 42 patients were participated referred in need of full arch implant-supported reconstructions in maxilla, mandible or both. All patients underwent a thorough clinical examination according to a generally accepted scheme. After the diagnostic workup was completed, a treatment plan was developed by using a cone beam computed tomography and software system. Using surgical guides 21 patients' dental implants were installed. Postoperative clinical and radiological monitoring was regularly conducted, and criteria for the success of implantation and success of prosthetics of implant-supported reconstructions were evaluated. 376 implants (6 to 8 dental implants in the edentulous arches) were installed for monolithic zirconia full arch reconstructions. Prosthodontic treatment was performed 3 to 6 months after implants healing time. Digital technologies were included in the work flow with the laboratory scanning of the master casts and CAD/CAM manufacturing software. The monolithic zirconia block were milled using CAD/CAM software according to the manufacturer’s specifications and then a monolithic zirconia restorations sintering. Outcome measures were: Implant success; prosthesis success; complications and marginal bone levels. Results: No intra-operative or immediate post-operative complications were noted. During a 3-year observation fracture of the monolithic zirconia or any other mechanical complications of prostheses, no registered, screws fractured in 3 prosthesis was observed over the 3-year study period. Conclusion: Our studies have shown good aesthetic, functional and mechanical properties of monolithic zirconia restorations and fewer complications.
Monolithic zirconium dioxide; Computer assisted manufacturing (CAD/CAM) technology; Implant-supported full-arch restorations
Gagik H, Gegham T, Khachtryan L, Vanyan N, Matevosyan D. Full Zirconia Fixed Implant-Retained Restorations Manufactured (CAD/CAM) From Monolithic Zirconium Dioxide: 5-Year Prospective Clinical Study. World J Oral Maxillofac Surg. 2022; 5(1): 1044..