正畸治疗联合与不联合超声骨刀治疗后下颌侧段颊侧骨缺损和牙横向移动的病例对照回顾性研究。
Buccal bone defects and transversal tooth movement of mandibular lateral segments in patients after orthodontic treatment with and without piezocision: A case-control retrospective study.
机构信息
Department of Orthodontics, School of Dentistry, CES University, Medellín, Antioquia, Colombia.
Department of Orthodontics, School of Dentistry, CES University, Medellín, Antioquia, Colombia.
出版信息
Am J Orthod Dentofacial Orthop. 2021 Mar;159(3):e233-e243. doi: 10.1016/j.ajodo.2020.08.017. Epub 2021 Jan 21.
INTRODUCTION
This study aimed to compare the extent of buccal bone defects (dehiscences and fenestrations) and transversal tooth movement of mandibular lateral segments in patients after orthodontic treatment with and without piezocision in cone-beam computed tomography and digital dental models.
METHODS
The study sample of this study consisted of cone-beam computed tomography scans and digital dental models taken before (T0) and after (T1) orthodontic treatment of 36 patients with moderate mandibular anterior crowding. The experimental group consisted of 17 patients that had piezocision performed at the beginning of treatment with the goal of accelerating tooth movement, which was compared with 19 patients who did not receive piezocision. The measurement of bone defects, buccolingual inclination, and transversal distances of the tooth in the mandibular lateral segments (mandibular canines, premolars, and first molars) were evaluated at baseline and at the end of the orthodontic treatment.
RESULTS
Overall, an increase in dehiscences, buccal inclination, and arch width from T0 to T1 was observed in both groups, but no statistically significant difference was found between groups. A significant increase in fenestrations from T0 to T1 was observed only for the canines in the experimental group. No statistically significant association was found between the increase of dehiscences and the amount of buccolingual inclination or transversal width changes. However, the changes in transversal width were statistically significantly associated with the increase in buccal inclination at the canines, first and second premolars.
CONCLUSIONS
No significant differences were found in buccal dehiscences and transversal tooth movement (buccolingual inclination and arch width) of mandibular lateral segments between patients after orthodontic treatment with and without piezocision. Dehiscences, buccal inclination, and arch width significantly increased from T0 to T1 in both groups.
简介
本研究旨在通过锥形束 CT 和数字牙科模型比较接受和未接受超声骨刀辅助正畸治疗的患者下颌侧段颊侧骨缺损（裂隙和开窗）的程度和牙齿横向移动。
方法
本研究的样本包括 36 例中度下颌前牙拥挤患者的锥形束 CT 扫描和正畸治疗前后（T0 和 T1）的数字牙科模型。实验组 17 例患者在治疗开始时行超声骨刀辅助治疗以加速牙齿移动，与未行超声骨刀辅助治疗的 19 例患者进行比较。在基线和正畸治疗结束时评估下颌侧段（下颌尖牙、前磨牙和第一磨牙）的骨缺损、颊舌倾斜和牙齿横向距离。
结果
总体而言，两组患者在 T0 至 T1 期间均观察到裂隙、颊舌倾斜和牙弓宽度增加，但组间无统计学差异。实验组仅在尖牙观察到 T0 至 T1 期间的开窗显著增加。未发现裂隙增加与颊舌倾斜或牙弓宽度变化量之间存在统计学显著相关性。然而，牙弓宽度的变化与尖牙、第一和第二前磨牙的颊舌倾斜增加呈统计学显著相关。
结论
接受和未接受超声骨刀辅助正畸治疗的患者下颌侧段颊侧骨缺损和牙齿横向移动（颊舌倾斜和牙弓宽度）无显著差异。两组患者 T0 至 T1 期间裂隙、颊舌倾斜和牙弓宽度均显著增加。
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