Changes of the condylar cartilage and subchondral bone in the temporomandibular joints of rats under unilateral mastication and expression of Insulin-like Growth Factor-1

Liu, Ziyang; Hou, Yali; Zhang, Pengfei; Lu, Haiyan; Wen, Wu; Ma, Wei

doi:10.1016/j.jormas.2021.09.013

Cited by 2 publications

(2 citation statements)

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“…Unilateral mastication pattern is a manifestation of impaired mastication function, 42 which can be caused by pain and impairments 43–45 . There is increasing evidence that prolonged unilateral mastication adversely affects maxillofacial soft and hard tissues due to the presence of asymmetric forces 46–49 . In this study, however, we did not observe any significant damage to the articular cartilage, trabecular bone of the condyle or tooth following unilateral masseter VML in a period of 28 days.…”

Section: Discussioncontrasting

confidence: 64%

“…[43][44][45] There is increasing evidence that prolonged unilateral mastication adversely affects maxillofacial soft and hard tissues due to the presence of asymmetric forces. [46][47][48][49] In this study, however, we did not observe any significant damage to the articular cartilage, trabecular bone of the condyle or tooth following unilateral masseter VML in a period of 28 days. The mastication behaviour changes may be fully compensated by the dentoskeletal system.…”

Section: Autologous Muscle Grafts For the Vml Modelcontrasting

confidence: 69%

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A critical size volumetric muscle loss model in mouse masseter with impaired mastication on nutrition

Zhao,

Huang,

Cheng

et al. 2024

Cell Proliferation

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Orofacial muscle defect due to congenital anomalies, tumour ablation or traumatic accident that exceeds endogenous regeneration capacity may lead to sustained deficits in masticatory function and nutrition intake. Functional recovery has always been the goal of muscle tissue repair, but currently, there is no suitable model for quantitative analyses of either functional consequences or treatment efficacy of orofacial muscle defect. This study proposed a critical size volumetric muscle loss (VML) model in mouse masseter with impaired mastication on nutrition. Full‐thickness VML defects in diameter of 1.0, 1.5, 2.0 and 3.0 mm were generated in the centre of the mouse masseter using a biopsy punch to determine the critical size for functional impairment. In the VML region, myogenesis was dampened but fibrogenesis was activated, as long with a reduction in the density of the neuromuscular junction and an increase in vascular density. Accordingly, persistent fibrosis was observed in the centre region of VML in all diameters. The 2.0 mm diameter was the critical threshold to masticatory function impairment after VML in the masseter. VML of 3.0 mm diameter led to a significant impact on nutrition intake and body weight gain. Autologous muscle graft effectively relieved the fibrosis and functional deficit after VML injury in the masseter. This model serves as a reliable tool in studying functional recovery strategies for orofacial muscle defects.

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Section: Discussioncontrasting

confidence: 64%