Clinical performance and risk factors of all-ceramic screw-retained implant crowns in the posterior region based on a retrospective investigation.

Publisher: John Wiley and Sons, Inc Country of Publication: Denmark NLM ID: 9105713 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1600-0501 (Electronic) Linking ISSN: 09057161 NLM ISO Abbreviation: Clin Oral Implants Res Subsets: MEDLINE

Publication: 2009- : Copenhagen : John Wiley and Sons, Inc.
Original Publication: Copenhagen : Munksgaard, c1990-

Crowns* ; Dental Restoration Failure* ; Ceramics*; Humans ; Retrospective Studies ; Risk Factors ; Male ; Female ; Middle Aged ; Adult ; Dental Prosthesis, Implant-Supported ; Aged ; Zirconium ; Dental Porcelain ; Dental Prosthesis Design

Objectives: Clinical data on all-ceramic screw-retained implant crowns (SICs) luted on titanium base abutments (TBAs) over more than 3 years are sparse. This study aimed to evaluate the clinical performance and potential risk factors for these restorations.
Materials and Methods: Analysis took place based on the medical patient-records of three dental offices. Implant survival and prosthetic complications over time were evaluated. The study included SICs in premolar and molar regions made from monolithic lithium disilicate ceramic (M_LiDi) or veneered zirconia (V_ZiO) luted on a TBA documented over an observation time of at least 3 years. Survival and complication rates were calculated and compared by a log-rank test. Cox-Regressions were used to check potential predictors for the survival (p < .05).
Results: Six hundred and one crowns out of 371 patients met the inclusion criteria and follow-up period was between 3.0 and 12.9 (mean: 6.4 (SD: 2.1)) years. Over time, six implants had to be removed and 16 restorations had to be refabricated. The estimated survival rates over 10 years were 93.5% for M_LiDi and 95.9% for V_ZiO and did not differ significantly among each other (p = .80). However, V_ZiO showed significantly higher complication rates (p = .003). Material selection, sex, age, and implant diameter did not affect the survival of investigated SICs but crown height influences significantly the survival rate (hazard ratio, HR = 1.26 (95%CI: 1.08, 1.49); p = .043).
Conclusions: Screw-retained SICs luted on TBAs that were fabricated from monolithic lithium disilicate ceramic or veneered zirconia showed reliable and similar survival rates. Increasing crown heights reduced survival over the years.
(© 2024 The Authors. Clinical Oral Implants Research published by John Wiley & Sons Ltd.)

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Keywords: complication rate; monolithic lithium disilicate ceramic; single implants; titanium base abutments; veneered zirconia

S38N85C5G0 (zirconium oxide)
C6V6S92N3C (Zirconium)
12001-21-7 (Dental Porcelain)

Date Created: 20240410 Date Completed: 20240710 Latest Revision: 20240710

20240710

10.1111/clr.14264

38594815