Wang Xue-Chun, Wang Yong, Xu Xiao-Bo, Hao Xin-He
Hefei School of Stomatology, Anhui Medical University. Hefei 230001, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2022 Jun;31(3):260-264.
To evaluate the clinical effect of three-dimensional digital smile design (3D-DSD) combined with double positioning crown extension guide in aesthetic restoration of anterior teeth.
Twenty patients who needed aesthetic crown lengthening and full crown restoration of upper anterior teeth were selected and randomly divided into the experimental group and control group, with 10 cases in each group. The experimental group carried out 3D-DSD, after confirming the plan, 3D printed double positioning crown extension guides were used to guide aesthetic crown lengthening, and full crown was completed 3 months after operation. The control group used traditional aesthetic crown lengthening and full crown restoration. PES/WES evaluation was performed before operation, three months and six months after operation. Visual analogue scales(VAS) were used to evaluate patient satisfaction 6 and 7 months after surgery, and the repeatability evaluation of VAS was conducted. The correlation between PES/WES score and overall satisfaction was analyzed 6 months after operation. SPSS 23.0 software package was used for statistical analysis.
The PES/WES scores of the two groups of patients at 3 months and 6 months after operation were higher than those before operation(P＜0.05). The two groups showed that the scores of the experimental group were significantly higher than those of the control group for PES 3 months after operation, PES and WES 6 months after operation(P＜0.05).Satisfaction survey results showed that the intra-group correlation coefficient of the two VAS results was 0.956(P＜0.05),and crown length-to-width ratio, smile curve, personality characteristics, patient participation and overall satisfaction in the experimental group were better than those of the control group(P＜0.05).The results of Speraman correlation analysis showed that PES and WES scores at 6 months after operation were positively correlated with overall satisfaction (rs1=0.905, P＜0.001; rs2=0.460, P=0.041).
3D digital smile design combined with double positioning crown extension guide guides the anterior aesthetic crown lengthening and restoration treatment, which can improve the effect of pink and white aesthetics after treatment and patient satisfaction.
评价三维数字微笑设计（3D-DSD）联合双定位牙冠延长导板在前牙美学修复中的临床效果。
选取20例需要进行上前牙美学牙冠延长及全冠修复的患者，随机分为试验组和对照组，每组10例。试验组进行3D-DSD，确定方案后，使用3D打印的双定位牙冠延长导板引导美学牙冠延长，术后3个月完成全冠修复。对照组采用传统美学牙冠延长及全冠修复。分别在术前、术后3个月和6个月进行PES/WES评价。术后6个月和7个月采用视觉模拟量表（VAS）评价患者满意度，并对VAS进行重复性评价。术后6个月分析PES/WES评分与总体满意度的相关性。采用SPSS 23.0软件包进行统计分析。
两组患者术后3个月和6个月的PES/WES评分均高于术前（P＜0.05）。两组比较，试验组术后3个月的PES评分、术后6个月的PES和WES评分均显著高于对照组（P＜0.05）。满意度调查结果显示，两次VAS结果的组内相关系数为0.956（P＜0.05），试验组的冠长宽比、微笑曲线、个性特征、患者参与度及总体满意度均优于对照组（P＜0.05）。Spearman相关性分析结果显示，术后6个月的PES和WES评分与总体满意度呈正相关（rs1=0.905，P＜0.001；rs2=0.460，P=0.041）。
3D数字微笑设计联合双定位牙冠延长导板引导前牙美学牙冠延长及修复治疗，可提高治疗后红白美学效果及患者满意度。
