摘要
目的阐明Angle各类错[牙合]及正常[牙合]冠状面咀嚼轨迹形态及特征。方法选取358名错[牙合]和22名正常[牙合]为研究对象。根据冠状面切牙点的咀嚼运动轨迹将咀嚼模式分为8种咀嚼型。错[牙合]患者分别按有无颞颌关节紊乱病，Angle分类分组。每一个个体分别计算左右侧第四个咀嚼环后10个咀嚼环中不同咀嚼型的个数，左右侧的平均值代表单侧咀嚼。Mann-Whitney U检验比较错[牙合]组与正常[牙合]之间各种咀嚼型发生频率的差异。结果结果正常[牙合]具有一个简单稳定的咀嚼模式。几乎所有错[牙合]组，正常咀嚼型发生频率明显小于正常[牙合]。关节紊乱病患者咀嚼型发生频率不同于无颞颌关节紊乱综合症患者，重叠咀嚼型相对易出现（p=0．005）。不同Angle分类，有各自特定咀嚼型分布。结论在分析错[牙合]畸形对咀嚼模式的影响时，颞颌关节紊乱病患者单独分开分析可能更合理。AngleⅢ类患者反向及反向交叉咀嚼型出现频率相对较高。ClassⅡ^1患者开口凹型咀嚼型发生率较高，可能与前牙台阶型拥挤患者比例较高有关。
Objective to clarify the chewing patterns between different Angle malocclusions and normal occlusion. Methods The sample was composed of 358 malocclusion subjects and 22 subjects with individual normal occlusion. The chewing patterns were classified into 8 chewing types according to the shape of frontal incisor point movement. The subjects with malocclusions were grouping according to the condition of TMJ, Angle Classification. The Mann-Whhney U test was performed to compare the frequency of each chewing type in each group with normal occlusion. Results it showed that normal occlusion has a simple and stable chewing type. Almost all the malocclusion group, normal chewing type significantly occurred much less than that in normal occlusion, superposition chewing type is significantly frequent （p= 0. 005） in TMD group. For different Angle classification, they showed their particular frequency distribution of chewing type. Conclusion It may be more reliable to seperate TMD subjects and non-TMD subjects when the chewing pattems of different occlusion types were analyzed. It indicated that the high frequency of reverse and reverse crossing chewing type in Class Ⅲ patients. Step crowding in anterior teeth was may associated with high frequency of open concave chewing type in Class Ⅱ^1.
出处
《口腔正畸学》
2007年第1期7-10,共4页
Chinese Journal of Orthodontics
