Analysis of reasons for failure of chair-side CAD/CAM ceramic restorations
10.12016/j.issn.2096-1456.2017.11.009
- Author:
MA Junchi
1
,
2
;
LI Jin
1
,
2
;
ZENG Xiaoyan
1
,
3
;
HU Jian
1
,
3
Author Information
1. Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University
2. Department of V.I.P., Affiliated Hospital of Stomatology, Nanjing Medical University
3. Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University
- Publication Type:Journal Article
- Keywords:
Chair-side CAD / CAM;
Risk of failure;
All-ceramic restoration;
Ceramic fracture;
Onlay
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2017;25(11):723-728
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the failure reasons of all-ceramic restorations fabricated with chair-side CAD-CAM technology (CEREC®) and to improve the clinical survival of all-ceramic restorations.
Methods :All-ceramic single-tooth restorations of CEREC® in stomatology hospital of Jiangsu province between 2013 and 2016 were summarized. By clinical examination and CEREC Biogeneric surveying, the failure reasons and related restoration types were evaluated. These results were analyzed with Chi-square test and Spearman correlation analysis.
Results:A total of 61 cases with restoration types of 11 inlays, 38 onlays, 2 endocrowns, and 11 all-crowns, resulted in a failure rate of 5.4% in all-ceramic single-tooth restorations in 1-4 years follow-up. The reasons for failure included ceramic fracture (n=33), debonding (n=13), tooth fracture (n=15), which attributed to thin ceramic thickness (n=27), acute line angle (n=6), insufficient enamel bulk (n=3), insufficient retention type (n=10), insufficient resistance type (n=15).
Conclusion : The most common reason for failure in CEREC® restorations was insufficient preparation space in occlusal surface.
- Full text:椅旁CAD-CAM系统修复失败的原因分析.pdf
