Effect of occlusion status on the time required for initiation of recovery in response to external disturbances in the standing position
Effect of occlusion status on the time required for initiation of recovery in response to external disturbances in the standing position
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DOI：
10.1016/j.clinbiomech.2006.11.001
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发表时间：
2007-03-01
影响因子：
1.8
通讯作者：
Morita, Sadao
中科院分区：
文献类型：
--
作者：
Hosoda, Masataka;Masuda, Tadashi;Morita, Sadao
背景。检查咬合状态是否有助于改善姿势平衡。方法。对 30 名没有平衡或口颌功能异常的健康青少年（15 名男性和 15 名女性；平均年龄 20.3；标准差 (SD) 1.6 岁）进行了检查。咬合是一个术语，意思是“咬紧牙关”。通过使用肌电图系统测量咬肌活动来评估闭塞状态。使用 EquiTest 系统((R)) 评估平衡能力，该系统测量测力板快速移动所产生的重心摇摆作为外部干扰（三个强度级别）。通过测量足部压力中心的位移来计算施加干扰后开始恢复所需的时间。根据闭塞状态比较数据。结果。小干扰后观察到潜伏期差异不大；然而，干扰越大，遮挡时的潜伏期越短，而没有遮挡时，潜伏期随着干扰的增加而增加。还发现遮挡和外部干扰之间存在统计学上显着的交互作用（P < 0.001）。解释。这项研究表明，当站立位置发生意外摇摆时，咬合有助于维持姿势平衡并提高稳定性。 (c) 2006 Elsevier Ltd. 保留所有权利。
Background. To examine whether occlusion status contributes to improvement of postural balance.Methods. Thirty healthy adolescents (15 males and 15 females; mean age, 20.3; standard deviation (SD) 1.6 years) with no equilibrium or stomatognathic function abnormalities were examined. Occlusion is a term meaning "jaw clenching." Occlusion status was evaluated by measuring masseter activity using the EMG system. Balancing ability was evaluated using the EquiTest system((R)), which measures sway of the center of gravity produced by rapid movement of force plates as an external disturbance (three intensity levels). The time required for initiation of recovery after application of the disturbance was calculated by measuring displacement of the center of foot pressure. Data were compared according to occlusion status.Findings. Little difference in latency was observed following a small disturbances; however, the greater the disturbance the shorter the latency with occlusion, while without occlusion, latency increased with increasing disturbance. A statistically significant interaction (P < 0.001) between occlusion and external disturbance was also found.Interpretation. This study suggested that occlusion contributes to maintenance of postural balance and improvement of stability when unexpected sway occurs in the standing position. (c) 2006 Elsevier Ltd. All rights reserved.