Tecco S, Colucci C, Calvisi V, Orso C A, Salini V, Festa F
Department of Odontostomatological Sciences, G. D'Annunzio, University of Chieti, Pescara, Chieti, Italy.
Minerva Stomatol. 2005 Nov-Dec;54(11-12):611-33.
The aim of the study was to evaluate the effects that an anterior cruciate ligament (ACL) injury of the knee has on postural control and activity of neck, head and trunk muscles in order to investigate the existence of connections between the masticatory system and body posture.
Surface electromyographic (sEMG) activity of the muscles and their asymmetry index, at mandibular rest position, and during maximal voluntary clenching (MVC), and posturometric and stabilometric measurements of 25 patients (mean age 28+/-9 years) having undergone ACL injury of the left knee were compared with a control non-pathologic group.
At rest, the patients showed a higher sEMG activity of the anterior temporalis, masseter, sternocleidomastoid and lower trapezius, compared with the control subjects (P<0.05). At MVC, the patients showed a lower sEMG activity of the right anterior temporalis and masseter and a higher sEMG activity of the lower trapezius, compared with the control subjects. For the stabilometric measurements, all the subjects showed a significant reduction in the Center of Pressure (CoP) path length during the test with eyes open and cotton rolls, compared with the test with eyes closed and mandibular rest position (P<0.05). In addition, the patients showed a significant displacement of the CoP in a forward direction (P<0.05) and to the righ side (P<0.05), compared with the control-subjects during each test.
ACL injury appears to be associated to a change in the sEMG activity of head, neck and trunk muscles and to a change in the position of the CoP of the body. Cotton rolls seem to improve the stability of the subject.
本研究旨在评估膝关节前交叉韧带（ACL）损伤对姿势控制以及颈部、头部和躯干肌肉活动的影响，以探究咀嚼系统与身体姿势之间联系的存在情况。
将25例（平均年龄28±9岁）左膝ACL损伤患者在颌骨休息位、最大自主紧咬（MVC）时肌肉的表面肌电图（sEMG）活动及其不对称指数，与一个非病理性对照组进行姿势测量和稳定测量比较。
休息时，与对照组相比，患者颞肌前束、咬肌、胸锁乳突肌和下斜方肌的sEMG活动更高（P<0.05）。在MVC时，与对照组相比，患者右侧颞肌前束和咬肌的sEMG活动更低，而下斜方肌的sEMG活动更高。对于稳定测量，与闭眼和颌骨休息位测试相比，所有受试者在睁眼和咬棉卷测试期间压力中心（CoP）路径长度均显著缩短（P<0.05）。此外，与对照组相比，患者在每次测试期间CoP均向前（P<0.05）和向右（P<0.05）显著移位。
ACL损伤似乎与头、颈和躯干肌肉的sEMG活动变化以及身体CoP位置变化有关。棉卷似乎可提高受试者的稳定性。
