Hu Wei, Zhou Yanheng
Department of Orthodontics, Peking University School of Stomatology, Beijing 100081, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2002 May;37(3):180-2.
To investigate the compensation of dental arch and teeth in patients with skeletal protrusion and deviation of mandible.
Measurement of 11 dental models was performed, midline of palate was defined as central line, the distance of every contact point to the midline was measured in each side. The dental arch symmetry was observed. Occlusion plane was defined as conference plane, the buccal or lingual inclination of posterior teeth in upper and lower arch was measured.
Upper arch was asymmetry in these patients, the arch width of deviated side (the side that the chin was deviated to) was broader than the other side. The posterior teeth of upper and lower arch were more buccally and lingually inclined respectively.
Skeletal protrusion and deviation of mandible may result in compensation of dental arch and teeth, the de-compensation is important in pre-operative orthodontic treatment.
探讨下颌骨骨性前突伴偏斜患者牙弓及牙齿的代偿情况。
对11个牙模型进行测量，以腭中缝为中线，测量每侧各接触点到中线的距离，观察牙弓对称性。以颌面平面为平面，测量上下牙弓后牙的颊舌向倾斜度。
这些患者上牙弓不对称，偏斜侧（即下巴偏向的一侧）的牙弓宽度比另一侧宽。上下牙弓的后牙分别向颊侧和舌侧倾斜更明显。
下颌骨骨性前突伴偏斜可能导致牙弓及牙齿的代偿，去代偿在术前正畸治疗中很重要。
