阻塞性睡眠呼吸暂停低通气综合征患者的下颌骨和颞下颌关节三维有限元模型的构建

目的建立阻塞性睡眠呼吸暂停低通气综合征(obstructive sleep apnea hypopnea symdrome,OSAHS)患者的下颌骨和颞下颌关节(并包含上气道及周围结构)的三维有限元模型,为治疗OSAHS从颞颌关节方面提供参考依据.方法对OSAHS患者颞颌关节及上气道行薄层CT扫描,获得OSAHS患者颞颌关节及上气道DICOM格式的图像信息,采用Mimics三维建模软件、Imageware逆向工程学软件、Ansys有限元分析软件建立的三维有限元模型.结果建立了OSAHS患者下颌骨和颞下颌关节(并包含上气道及周围结构)的三维有限元模型,共得到949 850个单元,932 932个节点.既能精确显示其三维空间结构和形态,又可以模拟下颌前移式口腔矫治器治疗OSAHS,为进一步研究此类方法治疗OSAHS从颞颌关节方面提供参考依据.结论建立准确、可行、灵活模拟操作的OSAHS患者下颌骨和颞下颌关节(并包含上气道及周围结构)三维有限元模型,为临床治疗OSAHS从颞颌关节方面奠定基础.

Construction of the Three-dimensional Finite Element Model of the Mandibular and Temporomandibular Joint in Patients with Obstructive Sleep Apnea Hypopnea Syndrome

Objective To construct the three-dimensional finite element model of the mandible and temporomandibular joint(contains the upper airway and surrounding structures)in patients with OSAHS(obstructive sleep apnea hypopnea syndrome),and provide references for the treatment of OSAHS from the temporomandibular joint.Methods The section images of an OSAHS patient’s mandible and temporomandibular joint were acquired by thin-section CT scanning and digital image processing was utilized to construct a three-dimensional finite element model by using mimics,imageware and ansys software.Results The three-dimensional finite element model was constructed which including 949850 elements and 932932 nodes with the mandible and temporomandibular joint.The exact three-dimensional shape of model was well constructed;it also simulated mandibular advancement oral appliance for the treatment of OSAHS to provide a reference for further study of the treatment from the temporomandibular joint.Conclusions The three-dimensional finite element model of the mandible and temporomandibular joint(includes he upper airway and surrounding structures)is more accurate and applicable.It is a basis for further study of OSAHS treatment from the temporomandibular joint.