改良牙体预备的热压铸全瓷粘接桥2年临床观察研究

目的　观察临床中下颌前牙缺失2颗以内的患者，采用改良粘接桥牙体预备后，热压铸造全瓷粘接桥临床修复效果。方法　32位患者共制作32件双翼下前牙热压铸造全瓷粘接桥，修复后3个月、6个月、1年和2年观察修复体的完整性，基牙的继发龋，边缘着色。 结果　3个月和6个月内32例患者中未出现脱落和折断病例，1年内出现1例脱落患者，2年内出现2例脱落患者，但均通过处理后再次完成粘接继续使用，所有病例在2年的观察期内均未发生继发龋和边缘着色，其颜色与邻牙相协调。整体修复成功率为90.6%。 结论　下前牙2颗以内缺失患者，采用改良粘接桥牙体预备后，热压铸造全瓷粘接桥修复，可以取得较好的临床修复效果。

All-ceramic resin-bonded bridge made of hot-pressed casting porcelain with improved tooth preparation:a two-year clinical observation

Objective To observe the clinical effect of all-ceramic resin-bonded bridge made of hot-pressed casting porcelain with improved tooth preparation in patients losing one or two mandibular anterior teeth. Methods 32 patients received the treatment. 32 two-retainers all-ceramic resin-bonded bridges were made. The integrity of the restorations, secondary caries of the abutments and the shade in the margin of the retainers were observed at 3 months, 6 months, 1 year and 2 years after the treatment. Result No loose and break of the bonded bridges were found after 3 months and 6 months. One prosthesis lost bond after 1 year, and two prostheses lost bond after 2 years, but they still could be used after being re-bonded. No secondary caries on the abutment and shade in margin of the retainers were observed after 2 years. Their color matched the adjacent teeth excellently. The success rate was 90.6%. Conclusion All-ceramic resin-bonded bridge made of hot-pressed casting porcelain with improved tooth preparation can obtain good restoration effect in patients losing one or two mandibular anterior teeth.