151. Fabricated CAD/CAM Post-Core Using Glass Fiber-Reinforced Resin Shows Innovative Potential in Restoring Pulpless Teeth
- Author
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Satoshi Imazato, Mikako Hayashi, Eriko Nambu, Ryousuke Tanaka, Naoko Suzaki, and Satoshi Yamaguchi
- Subjects
Technology ,Glass fiber ,Dentistry ,CAD ,Article ,CAD/CAM ,stomatognathic system ,fiber-reinforced resin composites ,Medicine ,Effective treatment ,General Materials Science ,A fibers ,Resistance test ,Universal testing machine ,Microscopy ,QC120-168.85 ,business.industry ,Fracture load ,QH201-278.5 ,Engineering (General). Civil engineering (General) ,TK1-9971 ,Core (optical fiber) ,Descriptive and experimental mechanics ,Electrical engineering. Electronics. Nuclear engineering ,indirect post-core ,TA1-2040 ,business - Abstract
The prevention of root fractures of pulpless teeth is an important clinical issue to maintain healthy teeth through lifetime. The aim of this study was to examine a clinically effective treatment method for strengthening vulnerable pulpless teeth using CAD/CAM (computer-aided design/computer-aided manufacturing) fiber-reinforced post-core by conducting a fracture resistance test. A post-core made with a fiber-reinforced resin disk TRINIA (TR, SHOFU, Kyoto, Japan) was fabricated using a CAD/CAM system. The fiber-layer orientation of the CAD/CAM post-core was parallel to the axis of the restored tooth. A post-core using a conventional composite and a fiber post (CF) was also prepared. A fracture resistance test of teeth restored with the post-cores and zirconia crowns was conducted using a universal testing machine, and fracture patterns were identified by micro-CT observation. The fracture load of the roots restored with TR was 1555.9 ± 231.8 N, whereas that of CF was 1082.1 ± 226.7 N. The fracture load of TR was 43.8% that was significantly higher than that of CF (Student’s t-test, p <, 0.05). The restored teeth with CAD/CAM resin post-core were found to be repairable even after fracture. These results suggest that the CAD/CAM indirect fiber post-core has the potential to strengthen the vulnerable pulpless teeth.
- Published
- 2021