Williamson E H, Simmons M D
Am J Orthod. 1979 Dec;76(6):612-7. doi: 10.1016/0002-9416(79)90207-0.
Fifty-three subjects were examined for mandibular asymmetry using measurements from submental-vertex and frontal cephalograms. All subjects displayed malocclusions and were examined for sensitivity of the muscles of mastication to palpation. The amount of pretreatment pain to muscle palpation was then correlated to the degree of asymmetry found. No statistically significant correlation was shown between mandibular asymmetry and muscle sensitivity. The following conclusions were drawn from this study: 1. There was no correlation between the amount of mandibular morphologic asymmetry and the amount of facial pain elicited from muscle palpation. 2. In the sample used, asymmetry seemed to be the rule rather than the exception. 3. The clinician needs to be aware of asymmetry in all three planes of space in order to plan his occlusal treatment in advance and prepare patients for possible compromise. 4. Class II molar and canine relationships may be more difficult to correct on the patient's right side than on his left, provided there is no compensation from glenoid fossa position or the maxillary dentition.
使用颏下-头顶位和正位头影测量法对53名受试者的下颌不对称情况进行了检查。所有受试者均存在错牙合畸形，并对咀嚼肌触诊的敏感性进行了检查。然后将肌肉触诊的治疗前疼痛程度与所发现的不对称程度进行关联分析。结果显示下颌不对称与肌肉敏感性之间无统计学显著相关性。从本研究得出以下结论：1. 下颌形态不对称的程度与肌肉触诊引起的面部疼痛程度之间无相关性。2. 在所用样本中，不对称似乎是常态而非例外。3. 临床医生需要了解空间三个平面中的不对称情况，以便提前规划咬合治疗并让患者做好可能出现折衷情况的准备。4. 如果没有关节窝位置或上颌牙列的代偿，右侧II类磨牙和尖牙关系可能比左侧更难矫治。
