徳島大学 教育・研究者情報データベース(EDB)

1. 徳島大学.大学院ヘルスバイオサイエンス研究部.再生修復医歯学部門.顎口腔再建医学講座.口腔顎顔面矯正学(2004年4月1日〜2015年3月31日)
2. 広島大学
3. 徳島大学.病院.診療科.矯正歯科(2003年10月1日〜)

1. (英) Nishio C

   役割	任意
   貢献度	任意
   学籍番号	推奨

2. (英) Tanimoto K

   役割	任意
   貢献度	任意
   学籍番号	推奨

3. (英) Hirose M

   役割	任意
   貢献度	任意
   学籍番号	推奨

4. 堀内 信也([徳島大学.病院.診療科.矯正歯科])

   役割	任意
   貢献度	任意
   学籍番号	推奨

5. 黒田 晋吾

   役割	任意
   貢献度	任意
   学籍番号	推奨

6. 丹根 一夫([広島大学])

   役割	任意
   貢献度	任意
   学籍番号	推奨

7. 田中 栄二([徳島大学.大学院医歯薬学研究部.歯学域.口腔科学部門.臨床歯学系.口腔顎顔面矯正学])

   役割	任意
   貢献度	任意
   学籍番号	推奨

(英) Stress analysis in the mandibular condyle during prolonged clenching: a theoretical approach with the finite element method.

(英) Parafunctional habits, such as bruxism and prolonged clenching, have been associated with functional overloading in the temporomandibular joint (TMJ), which may result in internal derangement and osteoarthrosis of the TMJ. In this study, the distributions of stress on the mandibular condylar surface during prolonged clenching were examined with TMJ mathematical models. Finite element models were developed on the basis of magnetic resonance images from two subjects with or without anterior disc displacement of the TMJ. Masticatory muscle forces were used as a loading condition for stress analysis during a 10 min clenching. In the asymptomatic model, the stress values in the anterior area (0.100 MPa) and lateral area (0.074 MPa) were relatively high among the five areas at 10 min. In the middle and posterior areas, stress relaxation occurred during the first 2 min. In contrast, the stress value in the lateral area was markedly lower (0.020 MPa) than in other areas in the symptomatic model at 10 min. The largest stress (0.050 MPa) was located in the posterior area. All except the anterior area revealed an increase in stress during the first 2 min. The present result indicates that the displacement of the disc could affect the stress distribution on the condylar articular surface during prolonged clenching, especially in the posterior area, probably leading to the cartilage breakdown on the condylar articular surface.

1. (英) Bite Force
2. (英) Bruxism
3. (英) Computer Simulation
4. (英) Dental Stress Analysis
5. (英) Elastic Modulus
6. (英) Finite Element Analysis
7. (英) Humans
8. (英) Mandibular Condyle
9. (英) Models, Biological
10. (英) Stress, Mechanical

1. (英) Article.Affiliation: Department of Orthodontics and Craniofacial Development Biology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan.

2. (英) Article.PublicationTypeList.PublicationType: Journal Article

3. (英) Article.PublicationTypeList.PublicationType: Research Support, Non-U.S. Gov't