ラミネートマウスガード材に関する研究  吸水性,荷重時の変形と成形前後の厚さ

  • 岡林 昌彦
    日本歯科大学新潟歯学部歯科補綴学教室第3講座
  • 清水 公夫
    日本歯科大学新潟歯学部歯科補綴学教室第3講座
  • 森田 修己
    日本歯科大学新潟歯学部歯科補綴学教室第3講座

書誌事項

タイトル別名
  • Study on Laminate Mouth Guard Materials. Water Absorption, Deformation under Loading, Thickness before and after Forming.
  • Water Absorption, Deformation under Loading, Thickness before and after Forming
  • 吸水性, 荷重時の変形と成形前後の厚さ

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抄録

Purpose: The purpose of this study was to propose criteria for designing a custom-made laminated mouth guard.<BR>Methods: In this paper, nine kinds of sheet materials were used for the experiment. The sheet materials were evaluated as to thickness and water absorption. Furthermore, deformation due to static loading and sheet thickness in various regions before and after forming, were determined.<BR>Results: 1. For all of the sheet materials tested, thickness was almost the same, and these materials were uniform in thickness. 2. The water absorption rate was the maximum for D 20 (Erkodur 2.00mm), and the minimum for F 4 (Erkoflex 4.00mm), and the rates of Es (Essix) and Pr (Pro-form) were similar. 3. The rate of deformation due to static loading was increased in the immersion for Erkodur and decreased for Erkoflex, whereas the rates were not changed for Es and Pr. 4. The rate of reduction in thickness due to forming was 10-20% in the occlusal surface for Erkodur, Erkoflex, and Erkoflex in combination with Erkodur or Erkoflex; however, the rate was 30-46% in other regions. In comparison, for Es and Pr, the rate of reduction was 2-4% in the median palatal tooth surface, and 26-54% in other regions. Conclusions: In this study, water-absorbing capacity of a mouth guard material, and effects of dipping on the hardness of the mouth guard, were investigated, and the thickness of each part of the mouth guard after forming, was determined. The present results provided useful information for design and<BR>construction of custom-made laminated mouth guards.

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