ガム咀嚼における咬合接触状態の運動学的解析  [in Japanese] A Kinetic Analysis of Occlusal Contacts during Masticating Chewing-gum  [in Japanese]

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Author(s)

    • 安陪 晋 ABE Susumu
    • 徳島大学大学院歯学研究科歯科補綴学第二講座 Department of Fixed Prosthodontics, Graduate School of Dentistry, The Universlty of Tokushima

Abstract

The purpose of this study was to clarify roles of occlusal facets in mastication. Ten adult male volunteers (mean age: 25.7±9.7years) participated in this study. Jaw movement during masticating chew. ing-gum was measured with the 6-degree-of-freedom jaw-tracking device (MM-JI). The relationship between occlusal facet and chewing movement was analyzed by combining the kinetic data and 3-dimensionally measured morphologic data of each subject. The results were as follows:<BR>1. During the grinding phase of mastication, the A and C occlusal facets of the upper and lower jaw molars became close to each other and formed the so-called squeezing room first. Then, the B occlusal facets of both jaws became close to each other as the volume of squeezing room was reduced (The A, B, and C occlusal facets correspond to the A, B, and C contacts of tripodization proposed by Thomas PK).<BR>2. Vector analysis revealed that jaw movement in the grinding phase of mastication was guided by the A or C occlusal facets and that the angle of jaw movement vector to the B occlusal facet of the opposite jaw was approximately 30°.<BR>The results suggested that the newly-developed analyzing method was effective for evaluating the occlusal condition during function.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 44(2), 274-283, 2000-04-10

    Japan Prosthodontic Society

References:  41

Cited by:  16

Codes

  • NII Article ID (NAID)
    10008155305
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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