Controlled clinical split-mouth study on the survival and success of cast gold partial crowns compared to CAD/CAM ceramic partial crowns: Results after 20 years
- Conditions
- K02.9Dental caries, unspecified
- Registration Number
- DRKS00033522
- Lead Sponsor
- Poliklinik für Zahnerhaltung und Parodontologie, Universitätsklinikum Regensburg
- Brief Summary
Out of initially 29 patients, 18 patients and 33 restorations could be included in the survival analysis revealing a cumulative survival of 73.3% for CGPC and of 55.6% for PCC, without statistically significant differences. Regarding FDI- and USPHS-criteria, 19 restorations (11 patients) were examined after a median (25-75%) observation period of 238 (236-242) months (19.9 years). Within these 11 patients, 10 CGPC and 9 PCCs were still in service. All available restorations showed ratings within the acceptable range exclusively (USPHS: Alpha and Bravo except for secondary caries, FDI-ratings 1-3). For USPHS-criteria surface luster (p=0.002) and marginal discoloration (p=0.02), both CGPCs and PCCs, revealed significant deterioration over time. Additionally, marginal adaptation of PCCs deteriorated over time (p<0.001) and was found significantly worse than of CGPCs at 20-years (p=0.003). In FDI-criteria, CGPCs performed significantly better regarding surface staining (A2a; p=0.047) and marginal adaptation (B6; p=0.01) compared to PCCs.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Complete
- Sex
- All
- Target Recruitment
- 11
Patients that were included in the initial study (Please also see https://pubmed.ncbi.nlm.nih.gov/16614863/). Patients had to present two large defects of the dental hard tissues suitable for restoration with CGPCs or PCCs and exhibit a moderate to good level of oral hygiene as represented by a papillary bleeding index (PBI) = 35% (Saxer and Mühlemann 1975). Furthermore, the teeth to be restored had to be free of any symptoms of pain, show tooth mobility less or equal grade I (i.e., mobility discernible, but not visible), and the application of rubber dam isolation had to be possible for insertion of PCCs.
Patients not meeting at least one of the inclusion criteria.
Study & Design
- Study Type
- observational
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method The Kaplan-Meier survival of partial crowns made of CAD/CAM ceramic or gold after 20 years was investigated on the basis of clinical examinations or, if otherwise not possible, on the basis of patient telephone calls.
- Secondary Outcome Measures
Name Time Method The clinical success of partial crowns made of CAD/CAM ceramics or gold was clinically examined 20 years after placement using FDI and USPHS criteria