关键词: 上颌前牵引, 唇裂, 腭裂, 软组织侧貌

Abstract:

Objective:The aim of this study is to investigate effects ofmaxillary protraction on softtissue profile in operated operated uni- lateral cleft lip and palate (UCLP) patients.Methods:A total of 10 growing UCLP patients (male 7, female 3), age from 812 to 12 years old (Average: 1014 years old), were selected to be treatedwithmaxillary protraction using head gear-chin cap-long hook protraction appliance. The appliance was worn 12~14 hours per day, and the protraction force was 400~500g each side. The protraction directionwas forward and slightly downward. The treatment period was 417 months (Average: 518 months). Cephalo- metricswere taken before and after treatment. The changes of soft-tissue profile were studied using the computer-aid X-ray cephalometric analysis.Results:After protraction, the points of Prn, Sn and Ls moved forward significantly. The distance from points Ls to E plane changed significantly from 0146mm before treatment to 1118mm after treatment. The angle G-Prn-Pgcde- creased significantly, andG-Sn-Pgcchanged significantly from-0130 before treatmentto 61260 aftertreatment. The anterior-poste- rior position of mandible and lower lip did not change significantly, the changes of angles Cm-Sn-Ls, Acls/SiLi had no statistical significance. The results indicated thatmaxillary protraction could make maxilla and upper lip move forward, and the convexity of soft tissue profile improve significantly.Conclusion:Maxillary protraction is an effective way to improve the facial deformity of op- erated UCLP patients. UCLP patients should have early interrupted treatment.

Key words: cleft palate, maxillary protraction, soft-tisue profile