義歯Qualityが総義歯装着者の咀噛筋断面積の減少に及ぼす因子  [in Japanese] The Effects of Denture Quality on Reduction of Masticatory Muscle Cross-Sections in Complete Denture Wearers  [in Japanese]

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Author(s)

    • 田邊 忠輝 TANABE Tadaki
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 虫本 栄子 MUSHIMOTO Eiko
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 田中 久敏 TANAKA Hisatoshi
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 井上 大一 INOUE Daiichi
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 遠藤 義樹 ENDO Yoshiki
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 長谷 剛史 HASE Takeshi
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 山田 芳夫 YAMADA Yoshio
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University

Abstract

The objective of this study was to determine whether denture quality might have an effect on masticatory muscle cross-section in the complete denture wearer.<BR>Seventy complete denture wearers were equally divided into a higher denture quality group (G 1) and a lower denture quality group (G 2) by using denture quality scale, described as 16 categories, which related to denture form, mandibular position, clinical findings, etc. The denture quality score for G 1 were significantly higher than G 2. MRI was used to analyze the masticatory muscle cross-section area. Masticatory muscle activity, during voluntary maximum clenching, was measured electromyography. Facial morphology was measured using cephalometric radiography. There was a significant reduction of the masticatory muscle cross-sections (masseter, temporalis posterior and medial pterygoid) as well as masticatory muscle activity (masseter, temporalis posterior) in G 2 (p > 0.05, ANOVA). G 1 showed a significant positive correlation between cross-section and masticatory muscle activity (r=0.393, p > 0.05), however, G 2 showed no correlation. In conclusion, denture quality was a significant factor in reduced masticatory muscle cross-sections and decreased muscle activity. In elderly edentulous patients, a complete denture with higher quality could help maintain masticatory muscle cross-section and activity.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(2), 312-320, 1999-04-10

    Japan Prosthodontic Society

References:  38

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008172886
  • 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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