两种嵌体修复后牙邻面缺损的疗效对比

目的 观察铸造钴铬（Co-Cr）合金嵌体与二氧化锆嵌体治疗后牙邻面缺损的临床疗效.方法 选取50颗2008-2011年因龋损或折裂等原因导致的磨牙牙体邻面缺损的患牙随机分成A组（27颗）和B组（23颗）,分别用铸造Co-Cr合金嵌体修复和二氧化锆嵌体修复治疗并跟踪随访12～24个月,评价治疗效果.统计分析采用SPSS21.0软件,P＜0.05为差异有统计学意义.结果 经过12～24个月的随访观察,治疗后两组间疗效比较,二氧化锆嵌体修复组总有效率（95.65％）明显优于铸造Co-Cr合金嵌体修复组（70.3％）,差异具有统计学意义（P.＜0.05）.结论 二氧化锆嵌体修复术用于修复后牙牙体缺损,既提高了充填后牙的美观度和强度,可更大程度地保存牙体硬组织,同时保护了牙周组织的健康,修复体及牙体抗折性能、边缘密合度等方面明显优于铸造钴铬（Co-Cr）合金嵌体,值得临床推广应用.

Comparison of two kinds of inlay for the interproximal defect of posterior teeth

Objective To observe the clinical effect of restoration with either casted Co-Cr alloy inlay or ZrO2 inlay for the interproximal defect of posterior teeth.Methods Fifty posterior teeth with interproximal defect from 2008 to 2011 were divided randomly into two groups：group A （27 teeth,treated with casted Co-Cr alloy inlay）,group B （23 teeth,treated with ZrO2 inlay）.The restoration was examined after 12～24 months to evaluate clinical effects.SPSS21.0 software package was used for statistical analysis.Significance was set at P〈0.05.Results According to 12～24 months＇ clinical observation,statistical analysis showed significant differences between the two techniques in the retention of restorations.The clinical effect was significantly better in group B than group A,with the total effective rate of 95.65%and 70.3%,respectively （P〈0.05）.Conclusion ZrO2 inlay shows significant superiority over casted Co-Cr alloy inlay.It is concluded that ZrO2 inlay can not only restore the strength and rigidity lost by the interproximal defect of posterior teeth,but also maintain the health of periodontal tissue,improve flexural performance and marginal adaptation between teeth and inlays.It is worthy of clinical promotion and application.