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。本研究选择10名Hellman牙龄表IIA期儿童和10名成人，分别在下颌骨静止位（静止位）、双侧接触咬合（夹板咬合）和单侧接触咬合（夹板咬合）三种咬合状态下进行头摆的研究。分别测量和分析站立和坐姿的头部摆动。成人站立位时，静止位两侧触咬时头部摆动幅度稳定，一侧触咬时头部摆动幅度不稳定。结论：1.儿童在上咬位时，头位轨迹稳定，但不能分辨左右侧和单侧的咬触差异.成年人在坐位时不能分辨休息位与双侧触摸的区别，但一侧触摸的程度高于其他部位。儿童不能识别三种咬合状态的差异.在站立位和坐姿中，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.