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器（MKG）来评估下颌运动。记录下颌骨3个主要运动（习惯性开合、快速开合和静止位）的10个变量，并进行模式分析。此外，下颌运动障碍的强度进行了分类，并通过评分的三个主要下颌运动的10个变量从0到10的规模进行评估。我们将此总分命名为下颌运动总分（TMK评分）。一组单侧唇腭裂患者，他们在口腔颌面疾病诊所接受了正畸治疗。通过TMK评分分析对东北大学齿科医院（UCLP组）和非腭裂志愿者（对照组）进行了研究。UCLP组下颌运动障碍的发生率较高。在习惯性开合、快速开合和休息位的个体模式分析中，UCLP组的异常运动模式多于对照组。UCLP组TMK评分明显高于对照组。我们还研究了唇腭裂患者的咀嚼能力，特别是那些接受正畸治疗和非唇腭裂年轻志愿者。根据增田的消光法（1982）使用ATP颗粒测量咀嚼能力。患者组的咀嚼能力均值低于正常对照组。本研究表明，年轻唇腭裂患者正畸治疗后咀嚼功能低下，下颌运动分析在唇腭裂患者正畸治疗中具有重要意义。

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.