TODENTJ-25-03-2019_TODENTJ-7-162 1553505492 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 11 29 2013 7 1 Yoshihiro Kondoh Tomotaka Takeda Takamitsu Ozawa Keishiro Narimatsu Michiyo Konno Toshiki Fujii Chieko Sekiguchi Kazunori Nakajima Keiichi Ishigami Masahito Shomura This pilot study compared impact strain at the core and root surfaces between two different post-core systems. Materials and Methods: The form of a bovine mandibular front tooth was modified to resemble that of a human maxillary incisor as a test specimen. A cast post and core (Metal PC) and composite resin and glass fiber-reinforced epoxy resin post (Fiber-Resin PC) system were tested. Four gauges were affixed to the buccal and lingual surfaces of the core and root. The specimens were then embedded in a metal mold using dental stone. A pendulum-type device with a pyramid-shaped metal impact object with a titanium alloy head was used to provide 2 different shock forces. Maximum distortion was measured and analyzed. Results: Distortion at the core at each measurement point and total amount of distortion with Fiber-Resin PC was significantly greater (p<0.05) than that with Metal PC against both impact forces. On the other hand, distortion at the root at the buccal measurement point with Fiber-Resin PC was significantly less than that with Metal PC against both impact forces. Total distortion was significantly less with Fiber-Resin PC than that with Metal PC against the greater impact shock. Acceleration with Fiber-Resin PC was significantly less than that with Metal PC against both impact forces. Conclusion: Fiber-Resin PC has the potential to protect remaining root against traumatic force. This suggests that a Fiber-Resin PC is more suitable for non-vital teeth against not only occlusal but also traumatic impact force. 11 29 2013 162 168 TODENTJ-7-162 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2013-8-20 2013-10-21 2013-10-23 2013-11-29 http://creativecommons.org/licenses/by-nc/3.0/ 10.2174/1874210601307010162 1553505492 https://opendentistryjournal.com/VOLUME/7/PAGE/162/ https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-162/TODENTJ-7-162.xml J Endod Dean JP 24 807 1998 Dean JP, Jeansonne BG, Sarkar N. 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