金属烤瓷修复体1168件五年观察

Five years'study of 1168 PFM restorations

目的观察金属烤瓷修复体产生的并发症,总结避免或减少并发症的方法。方法将728例共1168件修复体分为两组,对产生的并发症进行比较与分析,产生的并发症分为裂瓷、金属冠脱落、基牙折断、桩冠连桩松脱或折断、烤瓷桥松脱及牙髓、根尖周病变6类。第2组中吸取第1组的经验教训。结果第1组金属烤瓷修复体并发症发生率为6.38%(28例),第2组并发症发生率降为1.23%(9例)。结论严格选择适应症,合理设计,死髓牙加强抗力措施,认真制备牙体,根据基牙情况适当采用个性化处理,加强牙髓保护,有制作缺陷的及时返工,可明显降低烤瓷修复体并发症发生率。

Objective To observe the complications of porcelain-metal（PFM） restorations and tuwanarize the methods to avoid or eliminate complications of PFM restoration. Methods 1168 PFM restorations of 728 cases were devidedinto 2 groups, compsrcd and andlysed their complications which included porcelain crack, looseness of PFM crowns from abutments, fracture of abutments, looseness or fracture post-crowns, looseness of PFM bridges and lesion of the puh and periapical tissue. I oearnt experiences and lessons in group 2 from group 1. Results The complication rate of group 1 was 6.38%（28cases） while 1.23%（9 cases） in group 2. Conclusions It can eliminate obviously the complication rate of PFM restorations if we select indications strictly, design reasonably, strengthen the resistant forces of nonvital teeth, use individual methods in some of abutments and protect tooth pulps.