CAD/CAM全瓷冠修复后牙牙体缺损与常规烤瓷冠修复的对比观察

A comparative study on the restoration of posterior tooth defects with CAD/CAM all ceramic crown and conventional porcelain crown

目的对比后牙牙体缺损患者行CAD/CAM全瓷冠修复、常规烤瓷冠修复的效果。方法100例后牙牙体缺损患者,随机分为对照组和观察组,每组50例。对照组患者采取常规烤瓷冠修复治疗,观察组患者采取CAD/CAM全瓷冠修复治疗。比较两组患者牙龈反应、修复情况以及美观效果满意度评分。结果观察组患者修复体折断、修复体崩瓷、基牙继发龋发生率分别为0、2%、0,均低于对照组的8%、18%、10%,差异具有统计学意义(χ^2=4.1667、7.1111、5.2632,P<0.05)。观察组患者口腔外形、表面质地、颜色匹配、边缘适合性满意度评分高于对照组,修复后1个月牙龈指数、菌斑指数低于对照组,差异具有统计学意义(t=14.3561、15.2174、19.7195、20.2272、18.6418、18.3847,P<0.05)。结论对比常规烤瓷冠修复,CAD/CAM全瓷冠修复后牙牙体缺损效果好,稳定性好、美观度强,是优选修复治疗方式。

Objective To compare the effect of CAD/CAM all ceramic crown and conventional porcelain crown in restoration of posterior tooth defects.Methods A total of 100 patients with posterior tooth defects was randomly divided into control group and observation group,with 50 cases in each group.The control group was restored by conventional porcelain crown,and the observation group was restored by CAD/CAM all ceramic crown.The gingival response,restoration status and satisfaction score with aesthetic effect of the two groups were compared.Results The incidence of prosthesis fracture,prosthesis breaking and secondary caries of the abutment teeth of the observation group was 0,2%and 0 respectively,which was lower than that of the control group 8%,18%and 10%,and the difference was statistically significant(χ^2=4.1667,7.1111,5.2632,P<0.05).The satisfaction score with oral appearance,surface texture,color matching,marginal fitness of the observation group was higher than that of the control group,and gingival index and plaque index 1 month after restoration was lower than that of the control group,and the difference was statistically significant(t=14.3561,15.2174,19.7195,20.2272,18.6418,18.3847,P<0.05).Conclusion Compared with the conventional porcelain crown,CAD/CAM all ceramic crown is effective in repairing posterior tooth defects,with good stability and good aesthetics,and is the preferred method of restoration treatment.