摘要
目的探讨下颌骨外板截除术矫治下颌角肥大的可行性。方法中国实验用小香猪8头，建立截除下颌骨体部外板的动物模型；自下颌骨颏孔后0．5cm至角前切迹，截除单侧面积3．0cm×1．5cm下颌骨体部外板，对侧不手术作为自身对照；术后24周，处死动物，进行下颌骨大体形态观察，分别测量颏孔后1、2、3、4、5cm处下颌骨内、外板及全层厚度，同时行下颌骨局部生物力学的测定。结果下颌骨外板截除术后，局部骨骼大体形态无明显变形；术侧下颌骨体部内板变厚，外板变薄，总的厚度变薄（P〈0．05）。术侧下颌骨生物力学指标：最大载荷（1397．74±889．17）N，刚度（7994．69±5137．7）N，强度（754．74±370．90）N／cm^2与对照侧相比，差异均无统计学意义（P〉0．05）。结论动物实验结果提示，下颌骨外板截除术矫治下颌角肥大手术可行。
Objective To study the feasibility of prominent mandibular angle reduction using lateral mandibular cortex ostectomy. Methods Eight minitype pigs were used for removing the lateral cortex of mandibular body as an experimental model. Lateral cortex of mandibular body measured as 3.0 cm × 1.5 cm, from 0.5 cm posterior mental forarnen to antegonial notch, was removed in one side, and the other side remained intact as the control. Changes of mandibular modality and the thickness of the interior man dibular cortex, lateral mandibular cortex and mandibular body at different position, including 1 cm, 2 cm, 3 era, 4 cm, and 5 cm posterior mental foramen, as well as the biomeehanical characters were observed 24 weeks after operation. Results There was no obvious changes in mandibular modality. The thickness of mandibular body became thinner after mandibular cortex splitting （P〈0.05）, with interior mandibular cortex became thicker and lateral mandibular cortex thinner than that of the control side. There was no significant difference in biomechanical characters （ P 〉 0. 05 ） , including maximum loading （ 1397. 74 ± 889.17） N, stiffness （7994. 69±5137. 7） N, strength （754. 74±370. 90） N/cm^2. Conclusion The prominent mandibular angle reduction using lateral mandibular cortex ostectomy is feasible.
出处
《中华医学美学美容杂志》
2008年第6期407-409,共3页
Chinese Journal of Medical Aesthetics and Cosmetology
关键词
下颌角肥大
下颌骨外板
截骨
猪
Prominent mandibular angle
Lateral mandibular cortex
Osteotomy
Pig
