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Survival of Partial Coverage Restorations on Posterior Teeth-A Scoping Review
L S Prott1,2, P Klein1, F A Spitznagel1
1Department of Prosthodontics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany.
Summary
This study reviewed evidence on posterior partial coverage restorations (PCRs) made from various ceramics. While data exists for systematic reviews, definitions of success and failure vary, impacting comparisons.
Area of Science:
- Dental Materials Science
- Clinical Dentistry
- Evidence-Based Dentistry
Background:
- Systematic literature search (inception-February 2024) identified clinical studies on posterior partial coverage restorations (PCRs).
- Included 31 studies (13 RCTs, 18 NRS) with minimum 1-year follow-up.
- Identified heterogeneity in study design, outcome definitions, and statistical models.
Purpose of the Study:
- To investigate the nature and availability of evidence on the clinical performance of posterior PCRs.
- To assess ceramic material performance, outcome definitions, measurement methods, and follow-up data.
- To identify suitable studies for systematic reviews and meta-analyses.
Main Methods:
- Systematic literature search across multiple databases (MEDLINE, Scopus, CENTRAL, etc.).
- Inclusion criteria: posterior PCRs (onlays, occlusal veneers, partial crowns) with ≥1-year follow-up.
- Analysis of study designs, outcome definitions, and reasons for restoration failure.
Main Results:
- Common failure reasons included ceramic fractures and retention loss.
- Six RCTs comparing different ceramic materials were identified as potentially suitable for meta-analysis.
- Significant heterogeneity observed in survival definitions, evaluation methods, and statistical approaches.
Conclusions:
- Evidence on PCR clinical performance is varied due to differing definitions of survival, failure, and complications.
- Randomized controlled trials (RCTs) comparing ceramic materials for PCRs are available.
- Further systematic reviews and meta-analyses are feasible with existing RCT data.
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