Miller V J, Yoeli Z, Barnea E, Zeltser C
Department of Prosthodontics, Hebrew University Hadassah School of Dental Medicine, Jerusalem, Israel.
J Oral Rehabil. 1998 Sep;25(9):721-4. doi: 10.1046/j.1365-2842.1998.00303.x.
This study was undertaken to examine the relationship between condylar asymmetry and parafunction in patients with temporomandibular disorders (TMD). Twenty-eight patients with TMD and parafunction and 30 patients with TMD but no parafunction were examined. A panoramic radiograph was obtained for each patient and from this the condylar asymmetry determined. The group with parafunction showed a significantly (P < 0.005) higher asymmetry index than did the group with no noticeable parafunction. Patients were grouped into the following age ranges: 10-19 years, 20-29 years, 30-39 years, and 40 + years. The mean asymmetry index was determined for each age range for both groups of patients. The group of patients with TMD and parafunction had a higher mean asymmetry index in all the age ranges studied. This suggests that muscle hyperactivity may be a factor in the increased asymmetry found in patients with TMD.
本研究旨在探讨颞下颌关节紊乱病（TMD）患者髁突不对称与功能异常之间的关系。研究对象包括28例患有TMD且存在功能异常的患者以及30例患有TMD但无功能异常的患者。为每位患者拍摄全景X线片，并据此确定髁突不对称情况。存在功能异常的组比无明显功能异常的组具有显著更高的不对称指数（P < 0.005）。患者被分为以下年龄范围：10 - 19岁、20 - 29岁、30 - 39岁和40岁及以上。分别测定两组患者各年龄范围的平均不对称指数。在所有研究的年龄范围内，患有TMD且存在功能异常的患者组平均不对称指数更高。这表明肌肉活动亢进可能是TMD患者中发现的不对称增加的一个因素。
