Implant-Supported CAD/CAM Full-Arch Zirconia Bridges for Maxillary Edentulous Patients: A Case Series at Six Years of Function 

(Pages: 39-42)

Dilek Pinar Senyilmaz

Department of Prosthodontics, ADA Dental Clinic, Kusadasi, Aydın, Turkey




Abstract: Background: Complete-arch implant‐supported fixed dental prosthesis is a widely accepted treatment modality for edentulous patients with high long‐term implant survival rates. Today, advances in dental materials technology have led to the introduction of zirconium-oxide frameworks fabricated with Computer Aided Design/ Computer Aided Manufacturing (CAD/ CAM). However, only limited data are available on the clinical outcomes of maxillary edentulous arches treated with zirconia cross-arch fixed implant-supported prostheses.
Methods: This article describes rehabilitation of four maxillary edentulous patients with implant-supported full-arch fixed prostheses using all-ceramic frameworks fabricated from zirconium-oxide. Patients were then followed-up for 5 to 7 years (mean= 5.8 years).
Results: All restorations were in function and no complete fractures were noted during the follow-ups, accounting an implant and prosthetic cumulative survival rate of 100%. Five of 50 unit zirconia crowns experienced cohesive veneering ceramic material fractures during the first 2 years follow-up period with a clinical prosthetic success rate of 90 % at unit base, however, could easily be polished. During the 6 year period, one zirconia prosthesis had a technical complication of debonding which was resolved successfully by rebonding.
Conclusions: According to the findings of this clinical study from private practice, zirconia-based, implant-supported, cross-arch restorations can be considered as a reliable alternative to conventional porcelain-fused-to-metal restorations for rehabilitating the maxillary complete edentulous arches.

Keywords: Implant prosthesis, dental implants
, computer-aided design, computer-aided manufacturing (CAD/CAM), zirconia, maxillary complete arch prosthesis.