el-Mowafy O M
Faculty of Dentistry, University of Toronto, ON.
J Can Dent Assoc. 1996 Nov;62(11):862-5.
This article reviews the recent literature on clinical trial studies of acid-etch bridges. Due to long-term retention problems, acid-etch bridges are not as yet considered among the permanent types of bridge prosthesis. When failure of acid-etch bridges occurs, the weak link seems to be the enamel-resin junction rather than the metal-resin junction. A modified posterior acid-etch bridge design is described in detail. This design, which incorporates a major retention-promoting component, is meant to improve long-term retention of posterior acid-etch bridges. Cast projections are added to the bridge design. These fit loosely into slot cavities made in the abutment teeth. Following bridge cementation, the slot cavities are restored with posterior composite. As a result, the cast metal projections are locked into the abutment teeth. This added retention device will maximize the long-term retention of posterior acid-etch bridges.
本文综述了近期有关酸蚀粘结桥临床试验研究的文献。由于存在长期固位问题，酸蚀粘结桥尚未被视为永久性桥修复体类型。当酸蚀粘结桥出现失败时，薄弱环节似乎是釉质 - 树脂结合处而非金属 - 树脂结合处。详细描述了一种改良的后牙酸蚀粘结桥设计。这种设计包含一个主要的固位增强部件，旨在改善后牙酸蚀粘结桥的长期固位。在桥体设计中增加了铸造突。这些铸造突松散地适配于基牙上制备的槽形窝洞。桥体粘结后，用后牙复合树脂修复槽形窝洞。结果，铸造金属突被锁定在基牙中。这种增加的固位装置将使后牙酸蚀粘结桥的长期固位最大化。
