Chang Xiaochi, Han Ye, Xu Min, Luo Zhiqiang, Li Yi, Sun Yuzhe, Lin Cheng, Feng Yi, Xu Li, Hou Jianxia
Department of Periodontology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing, China.
Department of Stomatology, Beijing TongRen Hospital, Capital Medical University, Beijing, China.
J Dent Sci. 2025 Jul;20(3):1513-1522. doi: 10.1016/j.jds.2024.12.015. Epub 2025 Jan 7.
BACKGROUND/PURPOSE: During orthodontic decompensation in skeletal Angle Class III patients, a disruption of the periodontal tissues on the labial and lingual sides often occurs. This study aimed to assess the changes in the periodontal tissues of the mandibular anterior teeth after simultaneous labial and lingual augmented corticotomy (LLAC) surgery by digital measurements.
The present study enrolled 11 adult patients with skeletal Class III malocclusion, with a total of 66 anterior teeth, who underwent LLAC surgery. Cone-beam computed tomography (CBCT) and intraoral scanning were obtained before surgery, at the immediate postoperatively and at 6 months postoperatively. The gingival thickness, keratinized gingiva width and alveolar bone thickness were measured.
The mean labial and lingual gingival thicknesses were 0.51 ± 0.31 mm and 0.66 ± 0.48 mm preoperatively, and 0.80 ± 0.42 mm and 0.84 ± 0.66 mm at 6 months after LLAC. The mean keratinized gingiva width was 3.10 ± 1.20 mm preoperatively and increased by 0.65 ± 0.66 mm at 6 months after LLAC. The mean labial and lingual alveolar bone thicknesses were 0.84 ± 1.05 mm and 1.57 ± 1.65 mm preoperatively, and 2.28 ± 1.43 mm and 2.38 ± 1.58 mm at 6 months after LLAC. The patients showed significant increases in periodontal soft and hard tissues after surgery. In addition, there was a significant negative correlation between the gain of alveolar bone and gingival thickness.
LLAC could increase periodontal soft and hard tissue, including gingival thickness, keratinized gingiva width and alveolar bone thickness to provide more stable and healthier periodontal tissue for patients with insufficient alveolar bone thickness during orthodontic treatment.
背景/目的：在骨性安氏III类患者正畸去代偿过程中，唇侧和舌侧的牙周组织常出现破坏。本研究旨在通过数字化测量评估同期唇舌侧皮质骨切开辅助正畸治疗（LLAC）术后下颌前牙牙周组织的变化。
本研究纳入11例成年骨性III类错颌畸形患者，共66颗前牙，均接受了LLAC手术。在术前、术后即刻及术后6个月进行锥形束计算机断层扫描（CBCT）和口内扫描。测量牙龈厚度、角化龈宽度和牙槽骨厚度。
术前唇侧和舌侧牙龈平均厚度分别为0.51±0.31mm和0.66±0.48mm，LLAC术后6个月分别为0.80±0.42mm和0.84±0.66mm。术前角化龈平均宽度为3.10±1.20mm，LLAC术后6个月增加了0.65±0.66mm。术前唇侧和舌侧牙槽骨平均厚度分别为0.84±1.05mm和1.57±1.65mm，LLAC术后6个月分别为2.28±1.43mm和2.38±1.58mm。术后患者牙周软硬组织均有显著增加。此外，牙槽骨增量与牙龈厚度之间存在显著负相关。
LLAC可增加牙周软硬组织，包括牙龈厚度、角化龈宽度和牙槽骨厚度，为正畸治疗中牙槽骨厚度不足的患者提供更稳定、更健康的牙周组织。
