Schmitt J, Wichmann M, Karl M, Gölner M, Lohbauer U, Holst S (2011)
Publication Type: Journal article
Publication year: 2011
Book Volume: 77
Article Number: 31
Aim: The aim of this prospective clinical trial was to evaluate the performance of zirconiabased all-ceramic posterior fi xed partial dentures (FPDs) after 4 years of clinical use. Materials and Methods: Fifteen patients who needed 3- or 4-unit posterior FPDs were enrolled in the study. One manufacturer fabricated all restorations, following established clinical protocols and using computer-aided design/computer-aided manufacturing technology and one veneering material. Survival and success were evaluated clinically. Impressions were taken immediately after defi nitive cementation and after 48 months. Gold-coated epoxy replicas of the restorations were analyzed with scanning electron microscopy (SEM). Surface alterations were also evaluated clinically. Results: After 48 months, the survival rate for the FPDs was 100%. Three restorations exhibited minor chipping, for a fracture rate of 20% after 4 years. Thirty (59%) of the 51 individual restoration units revealed clinically rough occlusal surfaces, a fi nding that was confi rmed by SEM. Conclusion: The placement of 3- and 4-unit zirconia-based posterior FPDs can be considered a reliable treatment modality for medium-term clinical use. However, surface alterations of the veneering ceramics were observed after 4 years and are of notable clinical concern.
APA:
Schmitt, J., Wichmann, M., Karl, M., Gölner, M., Lohbauer, U., & Holst, S. (2011). Surface characteristics of zirconia-based posterior restorations: Clinical and scanning electron microscopic analysis. Journal (Canadian Dental Association), 77.
MLA:
Schmitt, Johannes, et al. "Surface characteristics of zirconia-based posterior restorations: Clinical and scanning electron microscopic analysis." Journal (Canadian Dental Association) 77 (2011).
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