Private Practice, Kossak-Szczuckiej Street 7/1, 40-578, Katowice, Poland.
Academic Center of Dentistry and Specialized Medicine, Pl. Akademicki 17, 41-902, Bytom, Poland.
Clin Oral Investig. 2018 Apr;22(3):1567-1578. doi: 10.1007/s00784-017-2255-3. Epub 2017 Oct 23.
The morphology of the maxillary and mandibular alveolar cortex plays an important role in the planning of orthodontic treatment. Cone-beam computed tomography (CBCT) provides a precise demonstration of anatomical structures. Therefore, the aim of this paper was to evaluate what influence the position of incisors and canines have on the dimensions of the cortical and spongious bone of the anterior mandibular alveolar process.
The material consisted of 100 CBCT volumes (61 females and 39 males, aged 18-71 years) obtained by means of a Gendex GXCB-500 machine and analysed using i-CAT Vision and CorelDRAW 9 software. Several linear and angular measurements were taken of cortical and spongious mandibular, vestibular and lingual alveolar bone.
The thickness of the vestibular spongious bone increased around lateral incisors and canines together with dental axis inclination, as did the thickness of the lingual spongious bone around central incisors and canines with greater angles of vestibular cortex curvature. In all teeth, the thickness of lingual cancellous bone decreased along with increase of the angle of tooth inclination. In the case of almost all groups of teeth, the thickness of lingual cancellous bone around teeth declined as the angle of curvature of the cortical bone decreased. The rotation of mandibular incisors and canines did not affect the thickness of the surrounding bone.
The position of teeth has little influence on vestibular bone thickness and is only significant around central incisors. In the case of almost all groups of teeth, the thickness of lingual spongious bone around teeth declined as the angle of curvature of the cortical bone decreased.
CBCT is a diagnostic tool that provides detailed information on the dimensions of the anterior dentate mandibular alveolar process.
上颌和下颌牙槽皮质的形态在正畸治疗计划中起着重要作用。锥形束计算机断层扫描（CBCT）能精确地显示解剖结构。因此，本文旨在评估切牙和尖牙的位置对前下颌牙槽皮质的皮质骨和松质骨的尺寸有何影响。
本材料由通过 Gendex GXCB-500 机器获得的 100 个 CBCT 容积（61 名女性和 39 名男性，年龄 18-71 岁）组成，并使用 i-CAT Vision 和 CorelDRAW 9 软件进行分析。对下颌、颊侧和舌侧牙槽皮质和松质骨进行了几个线性和角度测量。
随着颊侧皮质骨曲率角的增大，颊侧和舌侧的松质骨厚度在侧切牙和尖牙周围增加，同样地，随着中切牙和尖牙颊侧皮质骨曲率角的增大，舌侧的松质骨厚度也增加。在所有牙齿中，随着牙齿倾斜角度的增加，舌侧松质骨的厚度减小。在几乎所有的牙齿组中，随着皮质骨曲率角的减小，牙齿周围舌侧松质骨的厚度减小。下颌切牙和尖牙的旋转对周围骨的厚度没有影响。
牙齿的位置对上颌牙槽骨的厚度影响不大，仅在上颌中切牙周围有显著影响。在几乎所有的牙齿组中，随着皮质骨曲率角的减小，牙齿周围舌侧松质骨的厚度减小。
CBCT 是一种提供前牙下颌牙槽皮质详细尺寸信息的诊断工具。
