A study on the influence of occlusal stability on posture control -Comparison between children and adults-

为了评估咬合位置对儿童姿势控制系统的影响，使用了三维头部摆动测量装置。头部摆动与姿势控制系统有关，以Hellman牙龄量表IIA期儿童和成人各10例为研究对象，选择下颌静止位(休息位)、双侧咬合接触(夹板咬合)和一侧咬合接触(夹板咬合)三种咬合状态。站立和坐着时的头部摆动分别被测量和分析。成人站立位双侧咬合触碰头部摆动程度在静止位稳定，一侧咬合触碰头部摆动程度不稳定。结论：1.儿童咬合姿势头部位置轨迹比较稳定，但不能区分两侧和一侧咬合触碰的差异。成人坐姿时，不能辨别休息姿势和两侧触摸的区别，但一侧触摸比另一侧触摸更明显。对于儿童来说，他们不能识别三种咬合状态的差异。无论是站立姿势还是坐姿，儿童在三种咬合状态下的头部摆动程度均大于成人。

To evaluate how occlusal positions affect posture control system in children, a three-dimensional head sway measuring device was used. Head sway is related to the control system for posture, 10 children in the IIA period on Hellman's dental age scale and 10 adults were studied.Three occlusal conditions were selected : rest position of mandibula (rest position), bite touching on both sides (bite up using splints) and bite touching on one side (bite up using splint). Head sway was measured and analyzed separately for both standing and sitting positions.1. In standing position for adults, the degree of head sway in bite touching on both side were stable in rest position and that in bite touching on one side were unstable in them. The loci of head position were stable in bite up positions for children, but they can't recognize the difference between both sides and one side in bite touching.2. In sitting position for adults they can't recognize the difference between rest position and bith touching on both sides but touching on one side was grater than the others. For children the can't recognize the difference in three occlusal conditions.3. In both standing and sitting positions, the degree of head sway in three occlusal conditions i children was greater than in adults.