徳島大学 教育・研究者情報データベース(EDB)

1. 大久保 由紀子(->個人[郡 由紀子])

   役割	任意
   貢献度	任意
   学籍番号	推奨

2. 坂東 永一

   役割	任意
   貢献度	任意
   学籍番号	推奨

(英) Occlusal Contact and Clearance in Functional Mandibular Movement

(日) 機能運動時の咬合接触およびクリアランス

(英) We previously reported the three-dimensional analyzing system of occlusal toothcontacts. Using this system, we studied the functional tooth contacts and clearance of five subjectsparticularly during masticatory movements. 1. Tooth contacts and interocclusal clearance less than l mm can be analyzed during functio-nal mandibular movements by using the six-degree-freedom jaw movement data and the three-dimensional morphology measurement of tooth surfaces. 2 . Dominant tooth contacts were observed on the non-chewing side than on the chewing sideduring masticatory movements. The tooth contact sites on the non-chewing side corresponded tothe region of contacts or tiny clearance which occurs during mediotrusive movement. 3. Tooth contacts and clearance at the beginning and the end of chewing cycle (jaw opening and jaw closing) were compared with those during lateral excttrsive movement. Tooth contactsand clearance during masticatory movement toward opening more corresponded to those duringlateral excursive movement. In summary, the non-chewing side tooth contacts may play an important role in the support andguidance of mandible throughout the functional masticatory movements. That means there is a need for more precise evaluation regarding non-working side occlusal tooth contacts in functional movements.

(日) 機能的に望ましい咬合面形態および咬合関係の探求は,補綴学における最も重要な研究課題の1つである.われわれは顎運動と咬合面形態の関係を明らかにするための一助として,咬合接触の3次元解析システムを開発し報告した.このシステムを用いれば,これまでは観察が困難であった咀咽運動中の咬合状態を観察することが可能である.本論文では咀咽運動をはじめとした各種機能運動時の咬合接触およびクリアランスについて解析を行った.本研究の結果は,望ましい咬合面形態を決定する要件を導くであろう.

1. (英) tooth contact
2. (英) occlusal clearance
3. (英) lateral excursive movement
4. (英) masticatory movement