Christensen Gordon J
Clinical Research Associates, Provo, Utah 84604, USA.
J Am Dent Assoc. 2003 Jul;134(7):993-5. doi: 10.14219/jada.archive.2003.0293.
Crowns and fixed prostheses are well-proven, accepted and routinely used restorations. However, they occasionally come loose from tooth preparations. Many things can cause these failures. In this article, I have discussed the following reasons for lack of adequate retention of crowns and fixed prostheses: inadequate tooth preparation; too much trust in dentin bonding agents and lack of adequate tooth buildup; tooth preparations that lack irregularities; improper selection of cements; and lack of postoperative occlusal adjustment.
全冠和固定修复体是经过充分验证、被广泛接受且常规使用的修复体。然而，它们偶尔会从牙体预备上松动。许多因素都可能导致这些失败情况。在本文中，我讨论了全冠和固定修复体固位不足的以下原因：牙体预备不足；对牙本质粘结剂过度依赖且牙体预备量不足；牙体预备缺乏不规则形态；粘结剂选择不当；以及术后未进行适当的咬合调整。
