Abstract
Aim/Purpose: The primary aim of this study was to examine the clinical performance of posterior monolithic single crowns in terms of failure or complications and the secondary aim was to assess the quality of these restorations according to the United States Public Health Service (USPHS) criteria. Methods: Ιn a private dental clinic, 65 patients with need of posterior crowns were restored with monolithic zirconia crowns. All the restorations were evaluated 6 and 12 months after their cementation. The modified United States Public Health Service (USPHS) criteria and periodontal parameters were applied for the clinical evaluation of the crowns. Restorations with Alpha or Bravo rating were considered a success. Results: Descriptive statistics and nonparametric tests were used for statistical analysis. Sixty-five patients (mean age: 49.52) were restored with 65 monolithic zirconia crowns. No fracture of the restorations was recorded. The overall success rate was 98.5%. The clinical quality of all crowns was acceptable except for the marginal discoloration of one crown at the 6- and 12-month follow-up examination. Conclusions: In this study, no fracture of single-tooth monolithic crowns occurred and the success rate was high. Monolithic zirconia restorations fabricated is a viable option for the restoration of single posterior teeth.
Highlights
The CAD/CAM technology allows the fabrication of esthetic restorations with high efficiency in daily practice [1]
Studies have shown that the survival rates of zirconia-based single crowns are high and they are comparable to metal-ceramic
Sixty-five patients with a mean age of 49.52 years were restored with 65 monolithic zirconia crowns
Summary
The CAD/CAM technology allows the fabrication of esthetic restorations with high efficiency in daily practice [1]. Studies have shown that the survival rates of zirconia-based single crowns are high and they are comparable to metal-ceramic. The success of metal- or zirconia-ceramic restorations is diminished through the frequent occurrence of chippings [7,8]. This technical complication affects the aesthetic outcome, function, and longevity of the restoration. The use of monolithic zirconia FDPs for the restoration of missing teeth requires only minimal tooth reduction since there is no need of space clearance for the veneering material. The clinician takes advantage of the precision of the CAD/CAM technology, which allows the milling of the SCs in
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