1ピースの内歯冠の骨折耐性に対する物質損失と修復材料の影響:インビトロ研究
Abdulaziz Samran1, Mohamed Elbeshri2, Ahmed Wagdy Hashem3
1Visiting Associate Professor, Department of Prosthodontics, Propaedeutics and Dental Materials, Dental School, Christian-Albrechts University, Kiel, Germany; Associate Professor, Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia; and Associate Professor, Department of Prosthodontics, College of Dentistry, Ibb University, Ibb, Yemen.
The Journal of prosthetic dentistry
|August 31, 2025
まとめ
残った歯壁の数は,単体のCAD-CAM冠で修復された内歯治療を受けた前歯の骨折耐性を著しく改善します. 修復材料のタイプは,この耐性には影響しませんでした.
科学分野:
- 歯科
- バイオマテリアル科学
- 機械工学
背景:
- 片段のコンピュータ・アイド・デザインとコンピュータ・アイド・マニュファクチャリング (CAD-CAM) で修復された歯前歯の骨折耐性は,修復材料と残った歯の構造に影響されます.
- 最適な修復戦略は,内歯治療を受けた歯の長寿に不可欠です.
研究 の 目的:
- 異なるCAD-CAM修復材料と残留歯の構造が,単体のCAD-CAM冠で修復された,内歯治療を受けた上頭前歯の骨折耐性をどのように影響するか評価する.
主な方法:
- 64人の上頭前歯は,ジルコニア,樹脂改変セラミック,またはリチウム脱シリケート製の単体CAD-CAM冠で修復されました.
- 試料は,残留冠状壁の1つまたは2つをもとにサブグループに分けられました.
- 歯はダイナミックな負荷を受け 噛む力をシミュレートし 準静的負荷を受け 断裂抵抗を決定しました
主要な成果:
- 疲労試験中に解き放たれや骨折は発生しなかった.
- 骨折抵抗は,残った冠状の壁の数が増加するにつれて著しく増加した (P<.001).
- 使用されたCAD- CAM修復材料のタイプは,骨折耐性 (P<. 05) に有意な影響を及ぼさなかった.
結論:
- 残留冠状壁の数を増やすことは,単体のCAD-CAM冠で復元された内歯治療を受けた上頭前歯の骨折耐性を高める重要な要因です.
- 修復材料の選択 (ジルコニア,樹脂改変セラミック,リチウム脱シリケート) は,試験条件下での断裂抵抗に影響を与えなかった.
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