3D Craniofacial Growth Simulation System in Cleft Lip and Palate Patients

对早期使用上颌前牵引矫治器的唇腭裂患者进行了治疗前上颌骨额生长量的预测。选择北海道大学口腔医院正畸门诊已接受唇腭裂修复的单侧唇腭裂患者22例，男13例，女9例。22例患者治疗前平均年龄6岁7个月(5岁7个月~8岁2个月)。所有患者均接受过上颌前牵引矫治器治疗，治疗时间均在1年以上。在同一家医院的口腔外科，在1岁6个月左右的时候，用推回装置修复了上颌。分别于治疗前和每隔一年拍摄头颅正位和侧位片进行分析。利用头颅正位片，应用ANDOH等方法，测量…的曲度测量了更多的鼻中隔。从头颅侧位片测量了2个角度和4个线性头影测量。对矫治器引起的额部生长量与矫治前颅面形态进行相关分析。此外，还进行了多元回归分析。结果表明：1)上颌前牵引矫治器矫治后上颌骨的额部生长量与后上颌面高度、鼻中隔弧度呈显著正相关。但结果不足以预测上颌骨的生长量。2)利用前处理阶段的颅面形态数据，通过多元回归分析建立了上颌骨额生长量的预测公式。3)根据所建立的公式可以预测上颌骨的生长量。较少

The prediction of the quantity of frontal growth of the maxilla at the pretreatment stage was carried out in cleft lip and palate patients who used maxillary protraction appliance at an early period. 22 unilateral cleft lip and palate patients (13 males, 9 females) were selected from the Orthodontic Clinic of Hokkaido University Dental Hospital who already received lip and palate repair. The mean age of these 22 patients at the pretreatment stage was 6 years 7 months (Ranging between 5 years 7 months to 8 years 2 months). All these patients had undergone maxillary protraction appliance therapy with the treatment duration more than one year. The palate was repaired by push back mechanism in these cases at the age of about 1 year 6 months, in the Department of Oral Surgery of the same hospital. Frontal and lateral cephalograms taken at pretreatment stage and at an interval of one year were used for the analysis. Using the frontal cephalogram and applying the Andoh etc method, curveture o … More f the nasal septum was measured. From the lateral cephalogram 2 angular and 4 linear cephalometric measurements were measured. The correlation analysis between the amount of frontal growth caused by the appliance and the pretreatment craniofacial pattern was carried out. Further, multiple regression analysis was also done. The following results were obtained :1) The correlation coefficients between the amount of frontal growth of maxilla following the use of maxillary protraction appliance and post upper facial height and also the curveture of nasal septum presented significant results. However the results were not sufficient for prediction of the amount frontal growth of the maxilla.2) The formula for the prediction of the amount of frontal growth of the maxilla was established by multiple regression analysis using the data of the craniofacial pattern at pretreatment stage.3) It can be suggested that from the established formula, the amount of frontal growth of the upper jaw can be predicted. Less