2010 Fiscal Year Final Research Report

Comparison between stress analysis and clinical study for root fractured teeth treated with metal post.

Research Project

Project/Area Number	20791449
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Prosthetic dentistry
Research Institution	Matsumoto Dental University
Principal Investigator	NIIMURA Hiroko Matsumoto Dental University, 歯学部, 助教 (70329473)
Project Period (FY)	2008 – 2010
Keywords	歯台築造 / 有限要素 / 歯根破折
Research Abstract	A cause of alveolar bone absorption of mandibular premolar was investigated using three dimensional finite element models with and without alveolar bone absorption. For model weighted from lingual side without alveolar bone absorption, zone of stress concentration was found in central part of neck and corner of mesial or distal direction of the tooth. However, for model weighted from lingual side with alveolar bone absorption, stress concentration was not found. Also, for models weighted from buccal side and mesial or distal directions, stress concentration was not found. Therefore, alveolar bone absorption is caused by compressing stress from lingual side load.