Biomechanical study on the changes of stress in temporomandibular joints after the orthognathic surgery in patients with mandibular prognathism: a 3D finite element study

• Autorzy: Shu Jingheng , Wang Quanyi , Ma Hedi , Teng Haidong , Zheng Tinghui , Liu Zhan

Identyfikatory

DOI

10.37190/ABB-01601-2020-02

• Języki publikacji: EN

Abstrakty

EN

Purpose: This study aimed to analyze the changes of the stress distributions in TMJs for the pre- and postoperative patients with mandibular prognathism under unilateral occlusions, a frequent occlusion in mastication. Methods: Pre- and six-mouth postoperative cone-beam computed tomography images of thirteen patients diagnosed with mandibular prognathism were scanned and used to construct complete maxillofacial models, assigned as the Pre and Post group, respectively. Another ten asymptomatic individuals were defined as the Control group. The inhomogeneous properties were assigned to the models. The muscle forces and boundary conditions corresponding to left and right unilateral occlusions were applied on the models. The analysis of variation (ANOVA) was chosen for the comparison among the groups. Results: The results showed that the Pre group had abnormal stress distributions ang higher stress level in TMJs, compared with those of the Post and Control groups. Moreover, from clinical cases, symptoms of temporomandibular disorders (TMDs) always followed with increased stresses. Conclusion: Generally, orthognathic surgeries could improve the stress distribution in TMJs of the patients with mandibular prognathism under the unilateral occlusions. However, the postoperative complications, especially symptoms of TMD, were closely related to changes of stress for patients with mandibular prognathism after orthognathic surgeries. Individual virtual surgery and finite element analysis should be conducted to prevent complications in TMJ.

Słowa kluczowe

EN

temporomandibular joint; finite element method; mandibular prognathism; temporomandibular disorders

PL

staw skroniowo-żuchwowy; metoda elementów skończonych; prognatyzm żuchwy; zaburzenia skroniowo-żuchwowe

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2020
• Tom: Vol. 22, no. 2
• Strony: 155--163
• Opis fizyczny: Bibliogr. 30 poz., rys., wykr.

Twórcy

autor

Shu Jingheng

• Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China

autor

Wang Quanyi

• Key Laboratory of Deep Earth Science and Engineering, Ministry of Education, Sichuan University, Chengdu, China
• School of Aeronautics and Astronautics, Sichuan University, Chengdu, China

autor

Ma Hedi

• Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China

autor

Teng Haidong

• Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China

autor

Zheng Tinghui

• Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China

autor

Liu Zhan

• Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China

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