加齢,咬合支持,飼育飼料形態および栄養がラット下顎頭の粗鬆化に及ぼす影響 Effect of Occlusal Support, Dietary and Nutrition on Osteoporotic Changes of Old Rat's Condyle

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著者

    • 青木 聡 AOKI Satoru
    • 北海道医療大学歯学部歯科補綴学第1講座 Department of Removable Prosthodontics, School of Dentistry, Health Sciences University of Hokkaido

抄録

Ninety male Wistar rats were divided when 45 weeks old, into ten groups, the solid diet group, the soft diet group (fed powder diet containing the same components as solid one), the molarless group (all molars were removed when 45 weeks old and then fed powder diet), the low calcium solid diet group (fed solid diet low in calcium-deficient in vitamin D), the molarless with low calcium diet group (all molars were removed when 45 weeks old and then fed powder diet low in calcium-deficient in vitamin D). When 50 and 75 weeks old, measurements of bone mineral density (BMD) was performed by the image analyzing system in addition to observation by light microscopy of the condyles.<BR>The results were as follows:<BR>1. The molarless with low calcium diet group when 75 weeks old had a significantly lower BMD value of the condyle than all other groups (p<0.01).<BR>2. As for the solid diet group, age-related disorder of cell arrangement and decrease in the number of cells at cartilaginous layer, and thinning of the hypertrophic layer of the condyle were observed. As for the molarless group, it was found that the stratified structure was disordered at the cartilaginous layer and the trabeculars decreased in the number and thickness were observed. As for the low calcium solid diet group and the molarless with low calcium diet group, inhibition of calcification was observed at the subcartilaginous layer was observed.

収録刊行物

  • 日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society

    日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society 42(3), 374-382, 1998-06-10

    Japan Prosthodontic Society

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各種コード

  • NII論文ID(NAID)
    10008169527
  • NII書誌ID(NCID)
    AN00197911
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03895386
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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