切削纯钛嵌体冠修复短冠隐裂磨牙的临床应用

Clinical Application of Restoring of Short Coronal Cracked Molar with Cutting Titanium Inlay Crown

目的评价切削纯钛嵌体冠修复短冠隐裂磨牙的临床效果。方法将64颗短冠隐裂磨牙随机分为A组、B组。A组采用全冠修复,B组采用切削纯钛嵌体冠修复,治疗后每年复查1次,连续观察2年,比较2组的修复成功率。结果修复后1年,2组成功率差异无统计学意义(93.8%vs 100.0%,χ2=2.064,P>0.05),修复后2年,切削纯钛嵌体冠修复短冠隐裂磨牙成功率(96.9%)高于全冠组(68.8%),差异有统计学意义(χ2=8.892,P<0.01)。将全冠组失败病例改用切削纯钛嵌体冠修复后,固位良好,未脱落。结论切削纯钛嵌体冠有效提高了短冠隐裂磨牙修复时的固位。

Objective To estimate the clinical effect of cutting titanium inlay crown in the restoration of short cracked molar. Methods Sixty-four short coronal cracked teeth were randomly divided into group A and group B. Group A were treated by crown. Group B were treated by titanium inlay crown. The curative effect was evaluated every year and lasted 2 years. Results One year after the repair, there was no significant difference in the achievement ratio between two groups （93.8%vs 100%,χ2=2.064, P〉0.05）. Two years after the repair, the success rate was significantly higher in group B （96.9%） than that of group A （68.8%,χ2=8.892, P〈0.01）. The failed cases of group A were treated by cutting titanium inlay crown, showing good retention. Conclusion The retention of a short cracked molar can be improved by means of cutting titanium inlay crowns.