3种不同材料修复无髓年轻第一恒磨牙的临床研究

Clinical study of 3 different materials in the restoration of young pulpless first molar

目的:比较三种材料修复无髓年轻第一恒磨牙的临床效果。方法:275颗无髓并大面积牙体组织缺损的年轻第一恒磨牙分为3组,1组(93颗)采用树脂充填;2组(90颗)采用E-max高嵌体修复;3组(92颗)采用VITA enamic高嵌体修复;在修复后按照改良USPHS标准评价各组修复效果。结果:6个月随访:3组修复体修复效果差异无统计学意义(P>0.05)。1年随访:2、3组在修复体完整性、边缘密合性方面成功率高于1组(P<0.05);2年随访:2、3组在修复体完整性、边缘密合性方面成功率高于1组,2组修复体对颌牙磨损较1、3组重(P<0.05),修复体颜色匹配方面2组(100%)优于1组、3组(P<0.05)。结论:嵌体修复年轻恒牙牙体大面积缺损临床效果显著优于树脂充填,E-max铸瓷嵌体颜色匹配优于VITA enamic和树脂,VITA enamic嵌体在对对颌牙的保护优于E-max嵌体。

Objective:To compare the clinical effects of 3 kinds materials in the treatment of pulpless young first permanent molars.Methods:275 young pulpless first molars with large area of tooth tissue defect were randomly divided into 3 groups and repaired with resin(group 1),E-max onlay(group 2)and VITA enamic onlay(group 3)respectively.The effect of each group was evaluated by modified USPHS after treatment.Results:At 6 months follow-up there was no significant difference of the effect among the 3 groups(P>0.05).At 1 year follow-up the success rate of group 2 and group 3 in the integrity of the prosthesis and edge sealing was higher than that of group 1(P<0.05).At 2 years follow-up the success rate of group 2 and group 3 in the integrity of the prosthesis and edge sealing was higher than that of the group 1,the abrasion of oppisite teeth in group 2 was heavier than that of the group 1 and 3(P<0.05),the color matching of group 2(100%)was superior to that of group 1 and 3(P<0.05).Conclusion:Onlay is more effective in r epairing large area defect of young permanent teeth than resin.The E-max onlay is more color matching than VITA enamic onlay and resin filling.VITA enamic onlay is more protective for antagonist teeth.