D'Antò Vincenzo, Bucci Rosaria, De Simone Vincenzo, Huanca Ghislanzoni Luis, Michelotti Ambrosina, Rongo Roberto
Department of Neuroscience, Reproductive Sciences and Oral Sciences, University of Naples "Federico II", 80138 Naples, Italy.
Department of Orthodontics, Dental School, University of Geneva, 1205 Geneva, Switzerland.
Materials (Basel). 2022 Apr 4;15(7):2646. doi: 10.3390/ma15072646.
Background. Clear aligners treatment (CAT) is a common solution in orthodontics to treat both simple and complex malocclusions. This study aimed to evaluate the predictability of CAT, comparing the virtually planned and the achieved tooth movement at the end of stage 15, which is often the time of first refinement. Methods. Seventeen patients (mean age: 28.3 years) were enrolled in the study. Torque, tip and rotation were analyzed in 238 maxillary teeth on digital models at Pre-treatment (T0), at the end of stage 15 (T15) and at virtually planned stage 15 (T15i). Prescription, Achieved movement and performance values were calculated to compare the virtually planned and the clinical tooth position. Data were analyzed by means of Student’s t test with a level of significance set at p < 0.05. Results. The largest iper-performance was the torque correction of the second molars (+2.3° ± 3.1°), the greatest under-performance was the tip correction of the first molars (−2.3° ± 3.3°), while rotation corrections of all the teeth showed more accurate performance. No significant differences were found between mean Prescription and mean Achieved movement for all the assessed movements (p < 0.05). Conclusions. An accurate evaluation of CAT after the 15th aligner is fundamental in order to individuate the movements that are not matching the digital set-up.
背景。透明矫治器治疗（CAT）是正畸治疗中用于治疗简单和复杂错牙合畸形的常用方法。本研究旨在评估CAT的可预测性，比较在第15阶段末（通常是首次调整的时间）虚拟计划的牙齿移动和实际实现的牙齿移动。方法。17名患者（平均年龄：28.3岁）纳入本研究。在治疗前（T0）、第15阶段末（T15）和虚拟计划的第15阶段（T15i），对数字模型上的238颗上颌牙齿进行扭矩、倾斜和旋转分析。计算处方值、实现的移动和性能值，以比较虚拟计划的和临床牙齿位置。采用学生t检验分析数据，显著性水平设定为p < 0.05。结果。最大的超性能是第二磨牙的扭矩矫正（+2.3°±3.1°），最大的低性能是第一磨牙的倾斜矫正（−2.3°±3.3°），而所有牙齿的旋转矫正表现更准确。所有评估移动的平均处方值和平均实现的移动之间未发现显著差异（p < 0.05）。结论。在第15副矫治器之后对CAT进行准确评估至关重要，以便确定与数字设置不匹配的移动。
