Study to analysis of teeth and periodontal tissue vibration character and application to the diagnosis of periodontal disease

Research Project

Project/Area Number	06454725
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Research Field	Biomedical engineering/Biological material science
Research Institution	NIHON UNIVERSITY
Principal Investigator	KOIKE Kazuyoshi (1995-1996) Nihon University School of Dentistry, Assistant Professor, 歯学部, 講師 (70096808) 西連寺永康 (1994) 日本大学, 歯学部, 教授 (40058839)
Co-Investigator(Kenkyū-buntansha)	SAIRENJI Eiko Nihon University School of Dentistry, Professor, 歯学部, 教授 (40058839) GOTOH Minoru Nihon University School of Dentistry, Assosiate Professor, 歯学部, 助教授 (10102617) ITOH Kouiti Nihon University School of Dentistry, Assosiate Professor, 歯学部, 助教授 (90102607) 小池一喜日本大学, 歯学部, 講師 (70096808) 木村一之日本大学, 歯学部, 講師 (30147631)
Project Period (FY)	1994 – 1996
Project Status	Completed (Fiscal Year 1996)
Budget Amount *help	¥6,900,000 (Direct Cost: ¥6,900,000) Fiscal Year 1996: ¥1,200,000 (Direct Cost: ¥1,200,000) Fiscal Year 1995: ¥1,800,000 (Direct Cost: ¥1,800,000) Fiscal Year 1994: ¥3,900,000 (Direct Cost: ¥3,900,000)
Keywords	teeth and periodontal tissue / vibration character / frequecy analysis
Research Abstract	We evaluated the state of periodontal tissue by free vibration using an impulse hammer and obtained the folloeing results. 1. In an extracted teeth implantation model that showed viscous resistance similar to that of the periodontal membrane, both single-rooted teeth and multi-rooted teeth showed a certain vibration pattarn even when the vibration force was not accurately constant. 2. In model of periodontal disease produced using exracted teeth, vibration responses were decreased. 3. In the human healthy complete teeth, each tooth showed nearly the same responses irrespective of the strength of vibration. In the teeth partially of the strength of vibration respnses were decreased. These results suggest the applicabillity of this method to the diagnosis of periodontal disease.