IPS-Empress^<【encircled R】>の圧縮強度に関する検討 : 歯頸側辺縁ショルダー角度の影響 The Effect with Shoulder Angle to the Compressive Strength in IPS-Empress^<【encircled R】>

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著者

    • 鈴木 和彦 SUZUKI Kazuhiko
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of Dentistry, Iwate Medical University
    • 照井 崇之 TERUI Takayuki
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of Dentistry, Iwate Medical University
    • 永井 成美 NAGAI Shigemi
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of Dentistry, Iwate Medical University
    • 塩山 司 SHIOYAMA Tsukasa
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of Dentistry, Iwate Medical University
    • 石橋 寛二 ISHIBASHI Kanji
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of Dentistry, Iwate Medical University

抄録

For the usage of IPS-Empress crowns, a shoulder preparation must be done. This study evaluated the compressive strength of IPS-Empress crown with different shoulder angles. Three types of abutment having 90, 105 and 120 degree shoulder angle were used, and two types of crowns with shapes of flat (Sample F) and tapered (Sample T) occlusal surface were tested. Crowns were fabricated according to the manufacture's instructions and cemented to metal abutment with zinc-phosphate luting cement. Compressive strength was tested using an Auto-Graph DDS-5000 with a constant strain rate of 0.05mm/min. The mean compressive strength for sample F was 165.1±11.9 kgf for shoulder angle 90 degrees, 166.8±9.9 kgf for 105 degrees and 173.0±4.3kgf for 120 degrees. Statistical analysis (ANOVA and Newman-Keuls test) revealed that there is no differentiation among the compressive strength of three types of shoulder angle in sample F. On the other hand, the strength was 125.6±16.0kgf for shoulder angle 90 degrees, 134.5±5.7kgf for 105 degrees and 158.3±12.2kgf for 120 degrees for sample T, and the crowns with 120-degree shoulder angle showed a significantly higher strength than the other angles. It was concluded that, in crowns with tapered occlusal surface simulating a more clinical occlusal stress, 120-degree shoulder angle has the advantage of prevention of compressive stress.

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 43(4), 750-754, 1999-08-10

    Japan Prosthodontic Society

参考文献:  25件中 1-25件 を表示

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各種コード

  • NII論文ID(NAID)
    10008174253
  • 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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