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Zou Y, Cai S, Lin H, Cai J, Zheng DL, Lu YG, Xu L. Experimental functional shift-induced osteoarthritis-like changes at the TMJ and altered integrin expression in a rat model. Ann N Y Acad Sci 2022; 1511:210-227. [PMID: 35188225 DOI: 10.1111/nyas.14741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 12/01/2021] [Indexed: 12/13/2022]
Abstract
Mandibular deviation affects the biomechanical environment of the temporomandibular joint (TMJ) and causes thinning of cartilage on the deviated side. We aimed to evaluate, using a rat model, the effect of mandibular functional deviation on the TMJ in relation to the functional roles of integrin β family members. The effects of experimental functional deviation on the TMJ of 6-week-old Sprague-Dawley female rats, randomly assigned to control (n = 42) and experimental groups (n = 42), were evaluated at 3 days and 1, 2, 4, and 8 weeks by histological staining, immunofluorescence, real-time quantitative polymerase chain reaction, and micro-computed tomography. The results showed that the experimental functional shift changed the shape of condyles, thinned the cartilage, and increased the proportion of the hypertrophic layer on the deviated sides of condyles. In addition, the extracellular matrix of the condyle cartilage exhibited degradation at 1 week and subchondral trabecular bone was lost at 4 and 8 weeks. Osteoarthritis (OA)-like changes occurred in the left and right condyles of rats in the experimental group and were aggravated over time. Integrin β family expression, especially integrin β2 , was altered from week 1, possibly related to the OA-like changes. These data may provide insight into the onset of TMJ OA.
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Affiliation(s)
- Yuchun Zou
- Fujian Key Laboratory of Oral Diseases, School of Stomatology, Fujian Medical University, Fuzhou, China.,Orthodontics Department, Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China
| | - Senxin Cai
- Fujian Key Laboratory of Oral Diseases, School of Stomatology, Fujian Medical University, Fuzhou, China.,Orthodontics Department, Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China
| | - Hanyu Lin
- Fujian Key Laboratory of Oral Diseases, School of Stomatology, Fujian Medical University, Fuzhou, China.,Orthodontics Department, Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China
| | - Jingwen Cai
- Fujian Key Laboratory of Oral Diseases, School of Stomatology, Fujian Medical University, Fuzhou, China.,Orthodontics Department, Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China
| | - Da-Li Zheng
- Fujian Key Laboratory of Oral Diseases, School of Stomatology, Fujian Medical University, Fuzhou, China
| | - You-Guang Lu
- Fujian Key Laboratory of Oral Diseases, School of Stomatology, Fujian Medical University, Fuzhou, China.,Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Linyu Xu
- Fujian Key Laboratory of Oral Diseases, School of Stomatology, Fujian Medical University, Fuzhou, China.,Orthodontics Department, Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China
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Motoji H, To M, Hidaka K, Matsuo M. Vitamin C and eggshell membrane facilitate orthodontic tooth movement and induce histological changes in the periodontal tissue. J Oral Biosci 2020; 62:80-87. [DOI: 10.1016/j.job.2020.01.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/16/2020] [Accepted: 01/17/2020] [Indexed: 12/15/2022]
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