口腔颌面外科杂志
口腔頜麵外科雜誌
구강합면외과잡지
CHINESE JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
2014年
2期
108-112
,共5页
CT%MRI%颞下颌关节%三维有限元模型
CT%MRI%顳下頜關節%三維有限元模型
CT%MRI%섭하합관절%삼유유한원모형
CT%MRI%temporomandibular joint%finite element model
目的：利用MRI-CT影像数据融合和多种建模软件协同应用，构建较为精确的颞下颌关节有限元模型。方法：采集正常颞下颌关节CT和MRI影像数据，导入Mimics软件，分别提取颞下颌关节窝、髁突和关节盘并构建三维模型。根据解剖关系对关节窝、髁突和关节盘进行装配。将装配的颞下颌关节三维模型导入SC/Tetra进行干涉面删除。然后导入Mimics和Hypermesh软件对下颌骨和关节窝进行四面体网格划分，对颞下颌关节盘进行六面体网格划分并局部优化，构建包含关节窝、髁突和关节盘的颞下颌关节有限元模型。建立的颞下颌关节有限元模型用Abaqus软件进行简单的验证。结果：基于CT和MRI影像数据构建出关节窝、髁突和关节盘三维模型。以此为基础，多种建模软件协同应用构建的有限元模型，充分保持了颞下颌关节各结构的解剖学特征，在计算时能很好的收敛。结论：利用CT和MRI影像数据融合和多种建模软件协同应用的方法，可以构建活体颞下颌关节有限元模型，并较为准确地保持关节窝、髁突和关节盘的解剖真实性，为准确模拟颞下颌关节生物力学特征提供基础。
目的：利用MRI-CT影像數據融閤和多種建模軟件協同應用，構建較為精確的顳下頜關節有限元模型。方法：採集正常顳下頜關節CT和MRI影像數據，導入Mimics軟件，分彆提取顳下頜關節窩、髁突和關節盤併構建三維模型。根據解剖關繫對關節窩、髁突和關節盤進行裝配。將裝配的顳下頜關節三維模型導入SC/Tetra進行榦涉麵刪除。然後導入Mimics和Hypermesh軟件對下頜骨和關節窩進行四麵體網格劃分，對顳下頜關節盤進行六麵體網格劃分併跼部優化，構建包含關節窩、髁突和關節盤的顳下頜關節有限元模型。建立的顳下頜關節有限元模型用Abaqus軟件進行簡單的驗證。結果：基于CT和MRI影像數據構建齣關節窩、髁突和關節盤三維模型。以此為基礎，多種建模軟件協同應用構建的有限元模型，充分保持瞭顳下頜關節各結構的解剖學特徵，在計算時能很好的收斂。結論：利用CT和MRI影像數據融閤和多種建模軟件協同應用的方法，可以構建活體顳下頜關節有限元模型，併較為準確地保持關節窩、髁突和關節盤的解剖真實性，為準確模擬顳下頜關節生物力學特徵提供基礎。
목적：이용MRI-CT영상수거융합화다충건모연건협동응용，구건교위정학적섭하합관절유한원모형。방법：채집정상섭하합관절CT화MRI영상수거，도입Mimics연건，분별제취섭하합관절와、과돌화관절반병구건삼유모형。근거해부관계대관절와、과돌화관절반진행장배。장장배적섭하합관절삼유모형도입SC/Tetra진행간섭면산제。연후도입Mimics화Hypermesh연건대하합골화관절와진행사면체망격화분，대섭하합관절반진행륙면체망격화분병국부우화，구건포함관절와、과돌화관절반적섭하합관절유한원모형。건립적섭하합관절유한원모형용Abaqus연건진행간단적험증。결과：기우CT화MRI영상수거구건출관절와、과돌화관절반삼유모형。이차위기출，다충건모연건협동응용구건적유한원모형，충분보지료섭하합관절각결구적해부학특정，재계산시능흔호적수렴。결론：이용CT화MRI영상수거융합화다충건모연건협동응용적방법，가이구건활체섭하합관절유한원모형，병교위준학지보지관절와、과돌화관절반적해부진실성，위준학모의섭하합관절생물역학특정제공기출。
Objective: To develop finite element (FE) model for the temporomandibular joint (TMJ), including temporomandibular joint fossa (TMJF), mandible condyle, and temporomandibular joint disc (TMJD). Methods: The geometry of the TMJ from a healthy male volunteer, including the material properties of cancellous and cortical bone, were obtained from CT and MRI images. These data were used in MIMICS, an image-processing software, to form the geometry of TMJ before it could be introduced into SC/Tetra and Hypermesh software. Then the reconstructed models were assemble based on anatomic relation. Following the processes of intersecting surface deletion, mesh regeneration, optimization and tetrahedral mesh generation for TMJF and mandible condyle, whereas hexahedral mesh generation for TMJD, the TMJ finite element model,including different anatomical structures,was developed. The reconstructed finite element model was also imported into the Abaqus software to be tested. Results: The 3D mode of TMJ composed of TMJF,mandible condyle and TMJD was reconstructed from CT and MRI image data. Based on the 3D model,the TMJ finite element model was reconstructed by three reconstruction software retained the anatomical features of the included structures, and finite element model showed easy convergence. Conclusion: The method of CT-MRI image fusion combined with three reconstruction software is applicable to reconstruct the living subject TMJ finite element model ,which retains the geometry of TMJ-related anatomical structures,and offers a useful tool for accurate modeling of the TMJ biomechanical behavior.
