Präger Thomas Michael, Brochhagen Hans Georg, Mußler Axel, Mischkowski Robert, Jost-Brinkmann Paul-Georg, Müller-Hartwich Ralf
Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197, Berlin, Germany,
J Orofac Orthop. 2013 Sep;74(5):409-19. doi: 10.1007/s00056-013-0165-9. Epub 2013 Aug 25.
The clinical success of orthodontic anchorage plates depends on the stability of the miniscrews used for fixation. For good stability, the application site must provide bone of good quantity and quality. This study was performed to analyze bone quantity for orthodontic anchorage plates in the anterior mandible.
A total of 51 computed tomography (CT) scans of fully dentate patients (mean age 24.0±8.1 years; 27 men and 24 women) were evaluated. Measurements were taken to analyze the total orovestibular and vestibular cortical thickness of the mandibular jawbone at different anterior locations and levels.
Vestibular cortical thickness is generally thinnest within the incisor area on the apex level. Its thickness increases in basal and distal directions. The total orovestibular thickness is also the least on the level of the anterior mandibular apices, becoming thicker toward more basal levels and the posterior teeth.
We can reasonably assume that the stability of anchorage plates can be optimized by selecting a position well basal to the apices of the lower incisors, as this area offers enhanced cortical and total jawbone thickness.
正畸锚定板的临床成功取决于用于固定的微型螺钉的稳定性。为实现良好的稳定性，应用部位必须提供数量充足且质量良好的骨组织。本研究旨在分析下颌前部正畸锚定板的骨量。
共评估了51例全口牙齿患者的计算机断层扫描（CT）图像（平均年龄24.0±8.1岁；男性27例，女性24例）。进行测量以分析下颌骨在不同前部位置和水平的总口前庭及前庭皮质厚度。
前庭皮质厚度通常在根尖水平的切牙区域最薄，其厚度在向基部和远中方向增加。总口前庭厚度在下颌前部根尖水平也最小，向更基部水平和后牙方向变厚。
我们可以合理推测，通过选择在下切牙根尖基部良好的位置，可以优化锚定板的稳定性，因为该区域的皮质和下颌骨总厚度增加。
