Study of masticatory function in cleft lip and/or palate patients after secondary PMCB graft

我们使用下颌运动描记仪(MKG)来评估下颌运动。记录下颌骨习惯性开合行程、快速开合行程和静止位置3个主要动作的10个变量，并进行模式分析。在此基础上，对下颌三大运动的10个变量按0~10进行评分，对下颌运动障碍的强度进行分类和评价，我们称之为下颌总运动评分(TMK评分)。一组单侧唇腭裂患者在口腔颌面部疾病诊所接受过正畸治疗。对东北大学口腔医院(UCLP组)和非唇裂志愿者(对照组)进行TMK评分分析。UCLP组出现下颌运动障碍的患者较多。在习惯性开闭式、快速开闭式和静息位的个体模式分析中，UCLP组较对照组有异常的运动模式。UCLP组的平均TMK评分明显高于对照组。我们还研究了唇裂和/或腭裂患者的咀嚼能力，特别是那些接受正畸治疗的人和没有唇裂的年轻志愿者。根据Masuda消失法(1982)用三磷酸腺苷颗粒测量咀嚼能力。患者组的咀嚼能力均值低于非唇裂组。本研究表明，年轻唇腭裂患者在正畸修复后咀嚼功能较差，下颌运动分析对唇腭裂患者的正畸护理具有重要意义。

We used a mandibular kinegiograph (MKG) to evaluate mandibular movement. Tracings 10 variables of three major movements of the mandible, that is, habitual opening and closing stroke, rapid opening and closing stroke, and rest position, were recorded and assesed by pattern analysis. Furthermore, the intensity of mandibular movement disorder was classified and evaluated by scoring the 10 variables of three major mandibular movement on a scale of from 0 to 10. We named this summed score total mandibular kinetic score (TMK score). A group of patients with unilateral cleft lip and palate who had been performed orthodontic treatment at the Clinics for Maxillo-Oral Disorders. Tohoku University Dental Hospital (UCLP group), and non-cleft volunteers (control group) were studied by means of TMK score analysis. There were more patients who had the mandibular movement disorders in UCLP group. In the in dividual pattern analysis of habitual opening and closing stroke, rapid opening and closing stroke, and rest position, aberrant movement pattern were seen in the UCLP group than in the contral group. The mean TMK score in UCLP group was significantly higer than that in control group. We also studied the masticatory capacity both in cleft lip and/or palate patients, especially those who received orthodontic treatment and in non-cleft young volunteers. The masticatory capacity was measured using ATP granules in accordance with Masuda's extinction method (1982). The lower mean value of masticatory capacity was foundin the patients group compared with in non-cleft control group. This study showed that the young patients with cleft lip and/or palate acquired lower masticatory function after orthodontic dental rehabilitation and the analysis of mandibular movement was important in the orthodontic care of cleft lip and/or palate patients.