成人前牙开(牙合)患者舌骨位置的研究

摘要

Objective To compare the hyoid bone position between open bite and normal individuals. Methods Cephalograms of 30 open bite and 30 normal individuals in permanent dentition were retrospectively investigated by computerized cephalometric analysis, and the position of hyoid bone was evaluated in vertical and horizontal dimensions. Results Comparing with normal group, the position of open bite group was in line with normal group in vertical dimension. But in horizontal dimension, the hyoid bone was more backward in items of HA-C3 and HA-CVP. Conclusion There were statistical differences in hyoid position in horizontal dimensions between open bite and normal individuals.%目的 探讨开(牙合)患者舌骨位置特征.方法 60例患者分为两组,开验组30例,对照组30例.通过头颅侧位X线片研究两组患者舌骨位置的差异.结果 与对照组比较,开(牙合)组舌骨位置在垂直向上无差异.矢状向上,开(牙合)患者舌骨前上点HA与第三颈椎前下点C3的距离(HA-C3)为(31.10±4.27) mm,舌骨前上点HA与颈椎前平面的距离(HA-CVP)为(30.30±4.70) mm；对照组HA-C3和HA-CVP分别为(33.66±4.50) mm和(32.95±4.27) mm,开(牙合)组的HA-C3和HA-CVP小于对照组,差异均有统计学意义(P＜0.05).结论 开(牙合)患者舌骨位置矢状向上较对照组正常(牙合)群体相对颈椎更靠后.