唇腭裂患者上頜快速擴弓術(shù)生物力學的有限元研究.pdf

1、上海交通大學碩士學位論文唇腭裂患者上頜快速擴弓術(shù)生物力學的有限元研究姓名：余嘉申請學位級別：碩士專業(yè)：機械設(shè)計及理論指導教師：王成燾20050101上海交通大學碩士學位論文 ABSTRACT II A STUDY ON BIOMECHANICAL EFFECTS OF RAPID MAXILLARY

2、EXPANSION WITH UCLP USING FEM ABSTRACT The study on biomechanical mechanism of rapid maxillary expansion with unilateral cleft lip and palate (UCLP) will provide some explanation to the reason of post s

3、urgical relapse and guide clinical treatment plan. How to improve clinical effect of RME treatment in biomechanical view is becoming a hot spot in the field of orthodontics. Based on computed

4、tomography scan and CAD&FEA technologies, some researches have been done, the main contents and findings are as follows. 1. Windowing technique is applied to obtain more legible contour of bone with CT

5、 images, then seed region growing algorithm is used to extract contour lines of bone. Moreover, in order to gain accurate model for craniofacial orthodontic measurement, adding linear interpolation has been used to thr

6、ee dimensional model reconstruction with more triangle meshes. 2. Biomechanical finite element model of craniofacial complex with UCLP has been built. The RME forces dissipating path, main resis

7、tance part, stress distributions and deformations of craniofacial complex and sutures have obtained by finite element analysis. Meanwhile masticatory forces and autogenous alveolar bone grafting to

8、 RME with UCLP have been discussed. 3. For mesh reconstruction model from CT images, the possibility of orthodontic measurement method which is based on anatomical points registering has been discussed, then d