Biomechanical study of the maxillofacial complex in the treatment of Cleft lip and palate.

颌面复合体治疗唇腭裂的生物力学研究。

• 批准号: 06557114
• 负责人: SHIBASAKI Yoshinobu
• 金额: $ 3.9万
• 依托单位: Showa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06557114/
• 关键词: Cleft Lip and Palate; Maxillofacial complex; Scar tissue; 3DCT; FEM; 口唇裂口蓋裂; バイオメカニクス; CT; 骨密度; 三次元画像

The maxillofacial complex and its mechanical behavior in unilateral cleft lip and palate (UCLP) after palatoplasty was analyzed with the three-dimensional finite element method (FEM) . The study examined cross-sectional date sets of affected and control aged 7 to 15 years. Bone density measurement and its three-dimensional distribution was observed beforehand of FE modeling. The data from CT scanning was fed into computer graphic system and then the three-dimensional structure and density value were used as the geometrical information from several patient. Individual dento-maxillofacial skeleton was described on the three-dimensional and rectangular finite elements. The advantage of this FEM is that the evaluations are not dependent on the selected reference plane such as Cephalometrics and mechanical environment derived from various treatment technique is realized. From the analytical results, stress generated by the scar tissue was observed on the distal surface of maxilla and zyogomatics. Also stress generated by lateral expansion and maxillary protraction was observed on the buccal surface of maxilla above the molars. However, slight differences were observed on several patients. These findings suggested that the dramatic deformation associated with palatoplasty and the effect of treatment were related to the bone structure and mechanical properties in maxillofacial skeletons.

采用三维有限元法对单侧唇腭裂术后颌面部复合体及其力学行为进行了分析。该研究检查了7至15岁受影响和对照组的横断面数据集。在有限元建模前观察骨密度测量及其三维分布。将CT扫描数据输入计算机图形系统，然后将三维结构和密度值作为几例患者的几何信息。在三维和矩形有限元上描述个体牙颌面骨架。该方法的优点是评价不依赖于所选的参考平面，如头位测量，实现了各种处理技术产生的机械环境。从分析结果来看，瘢痕组织在上颌骨远端表面和颧骨处产生应力。在磨牙以上的上颌骨颊面也观察到侧扩和上颌前伸所产生的应力。然而，在一些患者中观察到轻微的差异。这些结果提示，腭成形术引起的巨大变形及其治疗效果与颌面骨的骨结构和力学性能有关。