单侧完全性唇腭裂患者上颌后牙最大咬合面积的测定与分析

目的：测定单侧完全性唇腭裂患者（ＵＣＬＰ）双侧后牙的ＩＣＰ位咬合面积，籍以分析其口腔功能状况。方法：以软蜡Ｈｅ片对２２例唇腭裂修补术后未经正畸治疗的ＵＣＬＰ患者作牙尖交错位咬合记录，以计算机图像分析系统测量其上颌后牙最大咬合面积，并与２４例正常Ｈｅ者的相应结果进行比较。结果：①正常Ｈｅ者其上颌后牙最大咬合面积无性别差异，也无左右侧差异；②ＵＣＬＰ患者上颌后牙最大咬合面积明显低于正常Ｈｅ者；③ＵＣＬ

The Study of Occlusal Contact Areas of Upper Premolars and Molars in the Unilateral Cleft Lip and Palate

OBJECTIVE: Occlusal contact plays an important roll in masticatory procedure. It infers to biting force and masticatory performance. In order to analysis the oral function in UCLP, the author tested the occlusal contact areas of upper premolars and molars in UCLP. METHODS: 22 UCLP patients (male 13, female 9, permanent teeth) were selected, which had no temporomandibular joint dysfunction. All of them had received plastic surgery treatment and never received orthodontic therapy. Their occlusal contact areas of upper premolars and molars in intercaspid position were recorded by performed soft wax, and the results were managed by computer with the software of micro image analysis system. All the data were input to computer and be analyzed by statistics. RESULTS: 1. In normal people, the occlusal contact areas of upper premolars and molars had no differences in bilateral and in sexual. 2. there was no sexual difference in UCLP as that in normal group, and the occlusal contact areas in cleft side or non-cleft side had no difference yet. 3. The occlusal contact areas in UCLP were lower than that in normal people. 4. The decrease of occlusal contact areas was the most important factor to low masticatory performance in UCLP patients. CONCLUSION: After plastic surgery in UCLP, orthodontic therapy will improve masticatory contact and contribute to craniofacial esthetic and masticatory function.