功能性矫治器引导下颌前伸对大鼠颅面形态影响的X线片头测量分析

STUDY ON CRANIO FACIAL MORPHOLOGY AFTER MANDIBULAR FUNCTIONAL PROTRUSION IN THE RAT

目的：评价功能性矫治器引导下颌前伸对大鼠颅面生长改建的影响。方法：用常规Ｘ线头测量术对３０只４周龄Ｗｉｓｔａｒ大鼠戴自制上颌功能性矫治器引导下颌前伸４周后，颅颌面的变化进行观测。结果：实验组大鼠下颌骨长度有增长趋势，下颌位置前移、下牙槽高度增加。

Objective: The purpose of this study is to evaluate the cranio facial adaptational changes after mandibular functional protrusion in the young rats. Method:Thirty 4 weeks old wistar rats were selected to wear the functional appliance to protrude the mandible for four weeks. The cephalometric method was applied to measure the changes in rat cranio facial morphology during the 4 weeks. Results: The length of the mandible showed: increasing trend and its position move anteriorly. The alveolar bone elevated. Concusion:This indicates that the remodelling of morphology and the cranio facial growth were influenced distinctly after mandibular functional protrusion in the rat.