Fracture resistance of endodontically treated anterior teeth restored with four post-and-core systems.
OBJECTIVE
The purpose of this study was to evaluate the fracture resistance and the mode of failure of endodontically treated teeth restored with four post-and-core systems.


METHODS
Forty intact human incisors were randomly divided into four groups. Teeth from each group received endodontic therapy and one of four post-and-core systems: serrated, parallel-sided, cast post and core; serrated, parallel-sided, prefabricated post and resin-composite core; carbon-fiber-reinforced (CFC) post and resin-composite core; and ceramic post and resin-composite core. A full-coverage metal crown was fabricated and cemented onto each tooth. Each specimen was subjected to a compressive load at a 45-degree angle to its axis until failure. The failure load was recorded and compared statistically. The mode of failure of the specimens was analyzed.


RESULTS
There was no significant difference in the failure loads among groups. More catastrophic root fracture was detected in the group restored with ceramic posts and resin-composite cores.


CONCLUSIONS
The fracture resistance of endodontically treated teeth restored with these four post-and-core systems could be accepted clinically. Unfavorable tooth fracture was shown in all groups.
Hu
Yun-Hsin
YH
Dental Department, Taichung Veterans General Hospital, Taichung, Taiwan, Republic of China.
Pang
Lok-Chao
LC
Hsu
Chii-Chih
CC
Lau
Yau-Hang
YH
D000704:Analysis of Variance; D002244:Carbon; D000077482:Carbon Fiber; D002516:Ceramics; D003188:Composite Resins; D019245:Compressive Strength; D019232:Dental Restoration Failure; D006801:Humans; D007180:Incisor; D008437:Maxilla; D011176:Post and Core Technique; D018709:Statistics, Nonparametric; D014082:Tooth Fractures / Q000150:complications*; D019553:Tooth, Nonvital / Q000150:complications*
D000077482:Carbon Fiber; D003188:Composite Resins; D002244:Carbon