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Orthodontic Treatment Outcomes in Jaw Motor Function Evaluated by Jerk-costs of Masticatory Jaw Movements

通过咀嚼颌运动的冲击成本评估颌运动功能的正畸治疗结果

基本信息

批准号：
14370695
负责人：
TAKADA Kenji
金额：
$ 9.73万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

(1)As regard to chewing jaw movements for adults with mandibular prognathism, impairment of the movement smoothness (higher values of the movement jerk-cost) and lower peak velocity have been determined as compared to those for the adults with acceptably good occlusaion.(2)An arbitrary plane could explain 99% of jaw movement trajectory in each single chewing cycle. The orientations of the planes that represent each chewing cycle performed by the subjects with anterior cross bite were more variable than those observed in subjects with acceptable good occlusion. After correction of the anterior cross bite, however, the variability of the plane orientations for the patients group was reduced. Based on a minimum variance theory, it is suggested that the gum-chewing cycle recorded after correction of the anterior cross bites is characterized as smooth and well patterned.(3)An new measurement algorithm, which is capable of sensitive monitoring of the smoothness of the jaw movement in speech articulation, has been developed.(4)Analytical simulation based on jerk-optimal criterion was developed in order to quantify and diagnose extent to which temporomandibular disorder affect the masticatory jaw motor function.(5)In case reports, it has been demonstrated that optimization of gum-chewing kinematics could occur as a result of orthodontic treatment of patient with prognathism and anterior cross bite. The improvement of the jaw kinematics was indicated by both normalized jerk-cost and prediction accuracy of the simulation by the minimum-jerk model.

(1)对于下颌前突的成人的咀嚼下颌运动，与咬合良好的成人相比，已确定运动平滑度受损（运动冲击成本较高）和较低的峰值速度。(2)任意平面可以解释每个咀嚼周期中 99% 的下颌运动轨迹。代表前牙反咬合受试者执行的每个咀嚼周期的平面方向比在具有可接受的良好咬合的受试者中观察到的变化更大。然而，在矫正前牙反合后，患者组的平面方向的变异性减少了。基于最小方差理论，建议前牙反牙合矫正后记录的口香糖咀嚼周期具有平滑和良好的特征。(3)开发了一种新的测量算法，能够灵敏地监测言语发音中下颌运动的平滑度。(4)开发了基于加加速度最优标准的分析模拟，以量化和诊断咀嚼周期的程度。颞下颌关节紊乱会影响咀嚼颌运动功能。(5)病例报告表明，对下颌前突和前牙反合的患者进行正畸治疗可以优化咀嚼牙龈的运动学。归一化的加加速度成本和最小加加速度模型模拟的预测精度表明了颌运动学的改进。