Biomechanical analysis of a temporomandibular joint condylar prosthesis during various clenching tasks

Huang, Hsuan‐Jung; Su, Kuo Chih; Fuh, Lih‐Jyh; Chen, Michael Y.C.; Wu, Jang Yen; Tsai, Ming Tzu

doi:10.1016/j.jcms.2015.04.016

Cited by 46 publications

(29 citation statements)

References 34 publications

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“…The models used in this study included four components, namely, the cortical bone of the mandible, cancellous bone, miniplate, and screws (Figure 1). The appearance of this study-constructed model was based on models of the mandible in previous studies [15], which were primarily composed of cortical bone and cancellous bone. The mandible model established in this study imports the CT images of the mandible to Mimics (Mimics Medical 19.0, Materialise, Leuven, Belgium), selects the peripheral contour of the mandibular cortical bone in Mimics using circles, and retracts the whole model by 2 mm to establish the contour of the cancellous bone structure.…”

Section: Methodsmentioning

confidence: 99%

“…In finite element analysis, different boundary conditions and loading conditions must be provided based on these four different occlusion conditions. This study based the external force data and application methods on those used in previous studies [15, 16]. For the boundary conditions, the condyle was set as a fixed node and the displacement setting method was used to fix the x -, y -, and z -axis displacements to 0, which allows this point to rotate freely.…”

Section: Methodsmentioning

confidence: 99%

“…Although many previous studies have used finite element analysis to investigate the biomechanical effects of BSSO fixation and provide recommendations to clinicians, most of the simulated models have been unilateral, the overall mandibular models are incomplete, and the applied external forces are simple, single external forces; hence, the simulated results likely do not reflect the actual conditions. Further, finite element analysis has been employed to investigate the effects of different external forces on implanted artificial total temporomandibular joints, focusing on the incisal clench (INC), intercuspal position (ICP), right unilateral molar clench (RMOL), left unilateral molar clench, right group function (RGF), and left group function occlusion conditions [15]. Therefore, the loading conditions and boundary conditions outlined in the present study will provide a reference for researchers in different occlusion conditions.…”

Section: Introductionmentioning

confidence: 99%

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Biomechanical Analysis of the Forces Exerted during Different Occlusion Conditions following Bilateral Sagittal Split Osteotomy Treatment for Mandibular Deficiency

Chang

Chan

Hsu

et al. 2019

Applied Bionics and Biomechanics

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The bilateral sagittal split osteotomy (BSSO) technique is commonly used to correct mandibular deficiency. If the patient is exposed to excessive external forces after the procedure, occlusal changes or nonunion may occur. However, previous studies only focused on single external forces on the mandible and did not conduct relevant research on the forces exerted by different occlusion conditions. The main purpose of this study was to use finite element analysis methods to determine the biomechanics of four common occlusion conditions after BSSO surgical treatment. This study constructed a finite element analysis computer model of a miniplate implanted in the lower jaw. The structure of the model consisted of the mandible, miniplate, and screws. In addition, external forces were applied to the superficial masseter, deep masseter, medial pterygoid, anterior temporalis, middle temporalis, and posterior temporalis muscles to simulate the incisal clench, intercuspal position (ICP), right unilateral molar clench (RMOL), and right group function occlusion conditions. Subsequently, this study observed the effects of these conditions on the miniplate, screws, and mandible, including the von Mises stress values. The results showed that all of the different occlusion conditions that this study evaluated placed high stress on the miniplate. In the ICP and RMOL occlusion conditions, the overall mandibular structure experienced very high stress. The screw on the proximal segment near the bone gap experienced high stress, as did the screw on the buccal side. According to the present analysis, although the data were not directly obtained from clinical practice, the finite element analysis could evaluate the trend of results under different external forces. The result of this study recommended that patients without intermaxillary fixation avoid the ICP and RMOL occlusion conditions. It can be used as a pilot study in the future for providing clinicians more information on the biomechanics of implantation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biomechanical Analysis of the Forces Exerted during Different Occlusion Conditions following Bilateral Sagittal Split Osteotomy Treatment for Mandibular Deficiency

Chang

Chan

Hsu

et al. 2019

Applied Bionics and Biomechanics

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show abstract

“…Following related references, we exerted maximum muscle force on the models to simulate extreme conditions. Parameters 29,31 of six principal jaw-closing muscles were listed in Table 5. The six main muscles involved: superficial masseter(SM), deep masseter(DM), medial pterygoid(MP), anterior temporalis(AT), middle temporalis(MT), posterior temporalis(PT) were simulated to both sides of the mandible from corresponding muscle attachment (Fig.…”

Section: Establishment Of Computer-aided Design (Cad) Modelsmentioning

confidence: 99%

Biomechanical analysis of costochondral graft fracture in temporomandibular joint replacement

Mao

Chen

et al. 2020

Sci Rep

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This study is the first attempt to explore the reason of costochondral graft fracture after lengthy mandible advancement and bilateral coronoidectomy by combining finite element analysis and mechanical test. Eleven groups of models were established to simulate costochondral graft reconstruction in different degrees of mandible advancement, ranging from 0 to 20 mm, in 2 mm increment. Force and stress distribution in the rib-cartilage area were analyzed by finite element analysis. Mechanical test was used to evaluate the resistance of the rib-cartilage complex. Results showed a sharp increase in horizontal force between 8 and 10 mm mandible advancement, from 26.7 to 196.7 N in the left side, and continue increased after 10 mm, which was beyond bone-cartilage junction resistance according to mechanical test. Therefore, we concluded that bilateral reconstruction with coronoidectomy for lengthy mandible advancement (≥ 10 mm) may lead to prominent increase in shear force and result in a costal-cartilage junction fracture, in this situation, alloplastic prosthesis could be a better choice. We also suggested that coronoidectomy should be carefully considered unless necessary.

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“…Hence the involved muscles in jaw opening and closing should be studied to understand the effect of muscle fiber orientations and the activation level of each muscle in the process of mastication and jaw opening (McFarland, 2014). Recently, Huang et al (2015) have investigated the stress and stability of TMJ prosthesis and the whole mandible during alternative clenching tasks. They modeled the muscle actions through specified muscle forces applied on muscles' attachment points while have not studied the dynamics of jaw movement and the effects of variation of direction and magnitude of muscle forces during these tasks.…”

Section: Introductionmentioning

confidence: 99%

Analysis of temporomandibular joint prosthesis using finite element method and a patient specific design

Omidi¹,

Jeannin²,

Nazari³

et al. 2019

10.5267/j.esm

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In this study, a 3D finite element model of an intact mandible was used for the simulation of the movement of the lower jaw and analysis of the effects of TemporoMandibular Joint (TMJ) prosthesis replacement on the jaw movement. Seven bundles of muscle fibers were inserted in their appropriate positions following anatomical data. Digastric, geniohyoid and lateral pterygoid muscles were considered for opening the mouth while medial pterygoid, superficial masseter, deep masseter and temporalis muscles were used for closing the mouth. Then, the TMJ was replaced by two different types of TMJ prostheses in the same way as in a surgery operation. One of the prostheses was designed based on anatomical shape of the ramus and condyle of the mandible while the other one was taken similar to the commercial TMJ prostheses. Eventually, all three models underwent an opening jaw simulation and produced an identical range of motion while were mismatched in other parameters. The results show that since the anatomical TMJ prosthesis resembles the shape and structure of an intact mandible; therefore, it is more capable of simulating the motion of mandible compared to the commercial TMJ prosthesis. Furthermore, better contact between the anatomical TMJ prosthesis and the mandible leads to lower stress distribution in comparison with the commercial TMJ implant. Finally, as the amount of muscle forces and strain in anatomical TMJ prosthesis replacement are less than the commercial one, the patient needs to make less effort to move the mandible and open the mouth.

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Biomechanical analysis of a temporomandibular joint condylar prosthesis during various clenching tasks

Cited by 46 publications

References 34 publications

Biomechanical Analysis of the Forces Exerted during Different Occlusion Conditions following Bilateral Sagittal Split Osteotomy Treatment for Mandibular Deficiency

Biomechanical Analysis of the Forces Exerted during Different Occlusion Conditions following Bilateral Sagittal Split Osteotomy Treatment for Mandibular Deficiency

Biomechanical analysis of costochondral graft fracture in temporomandibular joint replacement

Analysis of temporomandibular joint prosthesis using finite element method and a patient specific design

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