オーバーデンチャー支台歯上の補強法に関する研究

• 長田 知子

  鶴見大学歯学部歯科補綴学第一講座

書誌事項

タイトル別名

• Reinforcement for Overdentures on Abutment Teeth

抄録

Purpose: This study investigated the effect of the position of reinforcement wires, differences in artificial teeth, and framework designs on the breaking strength of overdentures.<BR>Methods: The basal surfaces of composite resin teeth and acrylic resin teeth were removed using a carbide bur. A reinforcement wire or a wrought palatal bar was embedded near the occlusal surface or basal surface. Four types of framework structures were designed: conventional skeleton (skeleton), housing with skeleton (housing), housing plus short metal backing (metal backing), and housing plus long metal backing (double structure). After the wires, bars, and frameworks were sand-blasted with 50μm Al₂0₃ powder, they were primed with a metal primer and embedded in a heat-polymerized denture base resin. The breaking strengths (N) and maximum stiffness (N/mm) of two-week aged (37deg;C) specimens were measured using a bending test (n=8). All data obtained at a crosshead speed of 2.0mm/min were analyzed by ANOVA/Tukey's test (α=0.01).<BR>Results: There were no statistical differences between the two kinds of artificial teeth (p>0.01). The wrought palatal bar had significantly higher strength than the reinforcement wire (p<0.01). Greater strengths were found for specimens with frameworks than those without frameworks (p<0.01). The breaking strength of the wrought palatal bar embedded near the occlusal surface was higher than that on the basal surface (p>0.01). The breaking strength and maximum stiffness of the double structure framework were significantly greater (p<0.01) than those of the conventional frameworks.<BR>Conclusion: The breaking strengths of overdentures were influenced by the size and position of the reinforcement wires. Double structure frameworks are recommended for overdentures to promote a longterm prognosis without denture breakage.

収録刊行物

• 日本補綴歯科学会雑誌

  日本補綴歯科学会雑誌 50 (2), 191-199, 2006

  社団法人 日本補綴歯科学会

キーワード

• オーバーデンチャー
• 破折強度
• 補強
• フレームワーク
• コーピング

詳細情報

• CRID: 1390282679388370560
• NII論文ID: 10017492474
• NII書誌ID: AN00197911
• DOI: 10.2186/jjps.50.191
• ISSN: 1883177X
• ISSN: 03895386
• PubMed: 16790958
• Web Site: http://www.jstage.jst.go.jp/article/jjps1957/50/2/50_2_191/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2006162091
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可