3D reconstruction of TMJ after resection of the cyst and the stress–strain analyses

Mahdian, Nima; Daněk, Josef; Nedoma, Jiří; Kohout, Josef; Hubáček, M.; Hliňáková, Petra

doi:10.1016/j.cmpb.2012.12.001

Cited by 27 publications

(18 citation statements)

References 16 publications

(17 reference statements)

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“…The comparison of the values obtained shows that they are consistent with those observed in other works on the stress-strain analysis of the human jaw [18][19][20]. In the work of Tie [18] the maximum stress was 25 MPa for healthy jaw model (completely full), while for Mahdian et al [19] the maximum stress is around 60 MPa, but in his study the model comprises an alloplastic implant titanium, applied to the medial part of the jaw, which probably led to higher stress. For Bertol [20] the maximum von-Mises stress, considering a healthy jaw, is around 20 MPa.…”

Section: Resultssupporting

confidence: 90%

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Biomechanical Stress and Strain Analysis of Mandibular Human Region from Computed Tomography to Custom Implant Development

Gregolin

Zavaglia

Tokimatsu

et al. 2017

Advances in Materials Science and Engineering

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Currently computational tools are helping and improving the processes and testing procedures in several areas of knowledge. Computed tomography (CT) is a diagnostic tool already consolidated and now beginning to be used as a tool for something even more innovative, creating biomodels. Biomodels are anatomical physical copies of human organs and tissues that are used for diagnosis and surgical planning. The use of tomographic images in the creation of biomodels has been arousing great interest in the medical and bioengineering area. In addition to creating biomodels by computed tomography it is also possible, using this process, to create mathematical models to perform computer simulations and analyses of regions of interest. This paper discusses the creation of a biomodel of the skull-mandibular region of a patient from CT for study and evaluation of efforts in the area of the temporomandibular joint (TMJ) aiming at the design and development of a TMJ custom prosthesis. The evaluation of efforts in the TMJ region due to the forces of mastication was made using the finite element method and the results were corroborated by comparison with mandibular models studied in similar works.

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Section: Resultssupporting

confidence: 90%

“…The boundary conditions assumed, material properties, and muscle forces applied in the model were obtained from the literature [8,[16][17][18][19][20][21]. In the model all the materials were considered linear.…”

Section: Methodsmentioning

confidence: 99%

Biomechanical Stress and Strain Analysis of Mandibular Human Region from Computed Tomography to Custom Implant Development

Gregolin

Zavaglia

Tokimatsu

et al. 2017

Advances in Materials Science and Engineering

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show abstract

“…Intra-operative navigation systems, initially developed for neurosurgical applications, allow the surgeons to determine the precise location of any instrument or bony anatomic landmark to within approximately 1 – 2 mm. The availability of 3D computer planning software and the use of 3D models in various surgical disciplines allows for an improved and more predictable reconstruction outcome [ 21 – 25 ].…”

Section: Discussionmentioning

confidence: 99%

Preliminary clinic study on computer assisted mandibular reconstruction: the positive role of surgical navigation technique

Huang

Shan

et al. 2015

Maxillofac Plast Reconstr Surg

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BackgroundThe objectives of the present study were to investigate the reliability and outcomes of computer-assisted techniques in mandibular reconstruction with a fibula flap and verify whether the surgical navigation system was feasible in mandible reconstructive surgery.MethodsEight cases were enrolled in the computer assisted surgery (CAS) group and 14 cases in the traditional group. The shaping and fixation of the fibula grafts were guided by computer assisted techniques, which could be monitored with the BrainLAB surgical navigation system. The variation of mandible configuration was evaluated by CT measurement in the Mimics software, including the variation of length, width, height and gonial angle of the mandible. The 3D facial soft tissue alteration was also analyzed in 3D chromatogram by Geomagic software.ResultsAll 22 fibula flaps survived. The mandibular configurations and facial contours had a better clinic result in the CAS group. The length, width, height and gonial angle of the reconstructive mandible were more similar to the original one. The Wilcoxon rank sum test analysis suggested significant differences in the measurements. The chromatographic analysis also visually showed superiority over the traditional group.ConclusionsThe computer assisted surgical navigation method used in mandibular reconstruction is feasible and precise for clinical application. The contour of the reconstructed mandible and facial symmetry are improved with computer techniques.

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“…TMJs are the most active joints in the human body with more than 2000 movements each day during chewing, biting, swallowing, talking, and snoring [1]. Dupuy-Bonafe et al indicated that the morphologic examination of the TMJ has important applications in the domain of TMJ pathology [2].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Morphologic Parameters of Temporomandibular Joint for Asymptomatic Subjects Using the Two-Dimensional and Three-Dimensional Measuring Methods

Zhang

2017

Journal of Healthcare Engineering

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The differences of temporomandibular joint (TMJ) morphologic parameters by using two-dimensional (2D) and three-dimensional (3D) measuring methods were compared. Ten asymptomatic subjects (26.75 ± 4.89 years) were randomly recruited. The 3D models of the maxilla, mandible, and teeth were reconstructed according to cone-beam computed tomography (CBCT) image data. The morphologic parameters of TMJs were measured by the 2D CBCT measuring method (group A) and the 3D reconstruction model measuring method (group B), respectively. The morphologic parameters in each group were assessed by paired samples t-test, and the statistical significance was achieved when p < 0.05. The horizontal condylar angle (HCA), sagittal ramus angle (SRA), medial joint space (MJS), lateral joint space (LJS), superior joint space (SJS), and anterior joint space (AJS) in group A were significantly smaller than those in group B (p < 0.05). The HCA on the left side was significantly smaller than that on the right side in group A (p < 0.05). However, all the morphologic parameters in group B were not significantly different between left and right sides. In conclusion, there were significant differences for the morphologic parameters of TMJ measured on 2D CBCT and 3D models. 3D measuring method should be used for the detection of TMJ morphology in clinical practice.

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3D reconstruction of TMJ after resection of the cyst and the stress–strain analyses

Cited by 27 publications

References 16 publications

Biomechanical Stress and Strain Analysis of Mandibular Human Region from Computed Tomography to Custom Implant Development

Biomechanical Stress and Strain Analysis of Mandibular Human Region from Computed Tomography to Custom Implant Development

Preliminary clinic study on computer assisted mandibular reconstruction: the positive role of surgical navigation technique

Comparison of Morphologic Parameters of Temporomandibular Joint for Asymptomatic Subjects Using the Two-Dimensional and Three-Dimensional Measuring Methods

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