Escobar-Correa Natalia, Ramírez-Bustamante Maria Antonia, Sánchez-Uribe Luis Alejandro, Upegui-Zea Juan Carlos, Vergara-Villarreal Patricia, Ramírez-Ossa Diana Milena
Department of Orthodontics, Faculty of Dentistry, University of Antioquia, Medellín, Colombia.
Department of Orthodontics, Faculty of Dentistry, University of Cartagena, Cartagena, Colombia.
Korean J Orthod. 2021 Jan 25;51(1):23-31. doi: 10.4041/kjod.2021.51.1.23.
To evaluate the mandibular buccal shelf (MBS) in terms of the angulation and bone depth and thickness according to sex, age, and sagittal and vertical skeletal patterns in a Colombian population using cone-beam computed tomography (CBCT). Accordingly, the optimal site for miniscrew insertion in this area was determined.
This descriptive, retrospective study included 64 hemi-arches of 34 patients. On CBCT images, the angulation, buccal bone depth (4 and 6 mm from the cementoenamel junction [CEJ] of MBS), and buccal bone thickness (6 and 11 mm from the CEJ of MBS) were measured at the mesial and distal roots of the mandibular first and second molars.
There were no statistically significant differences in the angulation, depth, and thickness of MBS between male and female patients. The values for the bone around the distal root of the mandibular second molar were significantly greater than the other values. The osseous characteristics were significantly better in participants aged 16-24 years. Class III patients exhibited the best osseous characteristics, with the bone depth at 6 mm being significantly different from that in Class I and Class II patients. Although values tended to be greater in patients with low angles, the difference was not statistically significant.
MBS provides an optimal bone surface for miniscrew insertion, with better osseous characteristics at the distal root of the mandibular second molar, 4 mm from CEJ. Adolescent patients, Class III patients, and patients with a low angle exhibit the most favorable osseous characteristics in the MBS area.
使用锥形束计算机断层扫描（CBCT），根据性别、年龄以及矢状和垂直骨骼模式，评估哥伦比亚人群下颌颊侧牙槽嵴（MBS）的角度、骨深度和厚度。据此确定该区域微型螺钉植入的最佳部位。
这项描述性回顾性研究纳入了34例患者的64个半牙弓。在CBCT图像上，在下颌第一和第二磨牙的近中根和远中根处测量角度、颊侧骨深度（距MBS牙釉质牙骨质界[CEJ]4和6mm处）以及颊侧骨厚度（距MBS的CEJ 6和11mm处）。
男性和女性患者的MBS在角度、深度和厚度方面无统计学显著差异。下颌第二磨牙远中根周围的骨值明显大于其他值。16 - 24岁参与者的骨质特征明显更好。III类患者表现出最佳的骨质特征，6mm处的骨深度与I类和II类患者有显著差异。尽管低角患者的值往往更大，但差异无统计学意义。
MBS为微型螺钉植入提供了最佳骨面，在下颌第二磨牙远中根距CEJ 4mm处骨质特征更佳。青少年患者、III类患者和低角患者在MBS区域表现出最有利的骨质特征。
