RESEARCH ARTICLE
Influence of Different Post-Core Systems on Impact Stress: a Pilot Study
Yoshihiro Kondoh1, Tomotaka Takeda2, *, Takamitsu Ozawa2, Keishiro Narimatsu2, Michiyo Konno2, Toshiki Fujii2, Chieko Sekiguchi2, Kazunori Nakajima2, Keiichi Ishigami 2, Masahito Shomura3, 4
Article Information
Identifiers and Pagination:
Year: 2013Volume: 7
First Page: 162
Last Page: 168
Publisher ID: TODENTJ-7-162
DOI: 10.2174/1874210601307010162
Article History:
Received Date: 20/8/2013Revision Received Date: 21/10/2013
Acceptance Date: 23/10/2013
Electronic publication date: 29 /11/2013
Collection year: 2013
open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
Abstract
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.
