Wang Mengjie, Huang Jing, Tang Xuan, Zheng Leilei, Yang Chongshi
Department of Orthodontics, The Affiliated Stomatological Hospital of Chongqing Medical University, 426 Songshi North Road, Chongqing, 401147, China.
Chongqing Key Laboratory of Oral Diseases, Chongqing, China.
BMC Oral Health. 2025 Jul 19;25(1):1210. doi: 10.1186/s12903-025-06537-7.
Despite the importance of dentoalveolar compensation in orthodontic treatment, the inclination of alveolar bone and its relationship with the incisors remain unclear in patients with different skeletal malocclusions. This study aimed to assess anterior alveolar bone inclination (ABI), tooth inclination (TI), and the angulation between them in patients with different skeletal patterns, using a novel method to define ABI, and explore skeletal parameters correlated with ABI.
Based on cone-beam computed tomography images of 79 adult patients, the ABI, TI, and the angulation between them were measured in the central incisor region. The subjects were classified into skeletal Class I, Class II division 1, Class II division 2, and Class III groups, and hypodivergent, normodivergent, and hyperdivergent groups. One-way analysis of variance was performed for intergroup comparison. Craniofacial skeletal parameters were also measured to evaluate correlations with ABI through correlation analysis.
The ABI and TI were smallest in skeletal Class II division 2 patients in maxilla and decreased gradually in skeletal Class II, I, III patients in mandible (P < 0.01). In terms of vertical skeletal patterns, the ABI in maxilla and the ABI and TI (related to the mandibular plane) in mandible decreased in hypodivergent, normodivergent, and hyperdivergent patients (P < 0.01). The angulation between ABI and TI in maxilla was smaller in hyperdivergent patients and largest in skeletal Class II division 2 patients (P < 0.05). Correlation analyses revealed that the ABI had correlations with TI, ANB, SN-MP, FHI, gonial angle, Y-axis angle, etc. CONCLUSIONS: The anterior ABI and TI, as well as the angulation between them, show significant variations across different skeletal patterns. ABI also exhibits correlations with several skeletal parameters. These variations should be considered in orthodontic treatment planning to reduce the risk of iatrogenic complications.
尽管牙槽骨代偿在正畸治疗中很重要，但不同骨骼错牙合畸形患者的牙槽骨倾斜度及其与切牙的关系仍不明确。本研究旨在使用一种定义牙槽骨倾斜度的新方法，评估不同骨骼类型患者的前牙槽骨倾斜度（ABI）、牙齿倾斜度（TI）及其之间的角度，并探索与ABI相关的骨骼参数。
基于79例成年患者的锥形束计算机断层扫描图像，在中切牙区域测量ABI、TI及其之间的角度。将受试者分为骨骼I类、II类1分类、II类2分类和III类组，以及低角、均角和高角组。进行单因素方差分析以进行组间比较。还测量了颅面骨骼参数，通过相关分析评估与ABI的相关性。
上颌骨骨骼II类2分类患者的ABI和TI最小，下颌骨骨骼II类、I类、III类患者的ABI和TI逐渐减小（P<0.01）。在垂直骨骼类型方面，低角、均角和高角患者上颌骨的ABI以及下颌骨的ABI和TI（与下颌平面相关）均减小（P<0.01）。高角患者上颌骨ABI与TI之间的角度较小，骨骼II类2分类患者最大（P<0.05）。相关分析显示，ABI与TI、ANB、SN-MP、FHI、下颌角、Y轴角等相关。结论：前ABI和TI及其之间的角度在不同骨骼类型中存在显著差异。ABI还与多个骨骼参数相关。在正畸治疗计划中应考虑这些差异，以降低医源性并发症的风险。
