数字化正畸修复联合治疗设计在前牙美学重建中的应用

Application of digital design of orthodontic-prosthodontic multidisciplinary treatment plan in esthetic rehabilitation of anterior teeth

目的:探索一种数字化正畸修复联合治疗的设计方法,并将其应用于前牙美学重建中,以提高医患沟通的效率及治疗效果的可预期性。方法:选取可能需通过正畸修复联合治疗解决前牙美学缺陷的患者20名,通过口内扫描仪获取患者口内软、硬组织数字模型,分别进行直接修复治疗设计和正畸修复联合治疗设计。对于直接修复治疗设计,采用修复设计系统在数字模型基础上进行诊断蜡型数字化设计;对于正畸修复联合治疗设计,首先利用正畸分析及设计系统以最终修复目标为导向进行虚拟排牙设计,随后将虚拟排牙后的数字模型导入修复设计系统进行最终修复效果的诊断蜡型设计。将两种设计效果分别向患者展示,由患者采用视觉模拟评分法对两种修复设计效果进行评分,比较患者对两种治疗方案美学评分的中位数有无差异,最终由患者综合考虑,选择治疗方案。结果:患者对直接修复治疗设计的评分的中位数为8.4,对正畸修复联合治疗设计的评分的中位数为9.0,后者高于前者且差异有统计学意义(P<0.01)。在综合考虑各项因素后,最终12名患者选择正畸修复联合治疗方案,8名患者选择直接修复治疗方案。结论:在复杂前牙美学治疗病例中,数字化正畸修复联合治疗设计具有可行性,可在治疗前为患者提供最终疗效预测,为医患沟通提供了便利的条件,有助于在患者满意的基础上达到更理想的美学效果。

Objective： To develop a digital workflow of orthodontic-prosthodontic multidisciplinary treatment plan which can be applied in complicated anterior teeth esthetic rehabilitation, in order to en-hance the efficiency of communication between dentists and patients, and improve the predictability of treatment outcome. Methods： Twenty patients with the potential needs of orthodontic-prosthodontic mul-tidisciplinary treatment to solve their complicated esthetic problems in anterior teeth were recruited in this study. Digital models of patients ’ both dental arches and soft tissues were captured using intra oral scan-ner. Direct prosthodontic （ DP） treatment plan and orthodontic-prosthodontic （ OP） treatment plan were carried out for each patient. For DP treatment plans, digital wax-up models were directly designed onoriginal digital models using prosthodontic design system. For OP treatment plans, virtual-setups were performed using orthodontic analyze system according to orthodontic and esthetic criteria and imported to prosthodontic design system to finalize the digital wax-up models. These two treatment plans were shown to the patients and demonstrated elaborately. Each patient rated two treatment plans using visual analogue scales and the medians of scores of two treatment plans were analyzed using signed Wilcoxon test. Having taken into consideration various related factors, including time, costs of treatment, each patient chose a specific treatment plan. For the patients chose DP treatment plans, digital wax-up models were exported and printed into resin diagnostic models which would be utilized in the prosthodontic treatment process. For the patients chose OP treatment plans, virtual-setups were used to fabricate aligners or indirect bon-ding templates and digital wax-up models were also exported and printed into resin diagnostic models for prosthodontic treatment after orthodontic treatment completed. Results ： The medians of scores of DP treatment plan and OP treatment plan were calculated and analyzed by IBM SPSS 20. The median of scores of DP treatment plan was 8.4, the minimum value was 6.9 and the maximum value was 9.3. The median of scores of OP treatment plan was 9.0, the minimum value was 7. 9 and the maximum value was 9. 6. The median of scores of OP was significantly higher than that of DP {Z - -3.23, P〈0.01） . Fi-nally, 12 patients chose OP treatment plans and 8 patients chose DP treatment plans. Conclusion; For cases with complex esthetic problems in anterior teeth, a digital workflow can demonstrate final treatment outcome and help patients make suitable treatment decisions. In our study, the orthodontic-prosthodontic multidisciplinary treatment plan is feasible which can provide predictions of treatment outcome and im-prove esthetic outcome with patients ^ satisfaction.