Comprehensive measurement and quantification of bio-mechanical properties of the temporomandibular joint disc
10.3760/cma.j.cn112144-20210322-00133
- VernacularTitle:山羊颞下颌关节盘生物力学的多维测量及定量分析
- Author:
Nan JIANG
1
;
Yutao YANG
;
Ruiye BI
;
Pinyin CAO
;
Yi HOU
;
Songsong ZHU
Author Information
1. 四川大学华西口腔医院口腔颌面外科 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心，成都 610041
- Keywords:
Temporomandibular joint;
Temporomandibular joint disc;
Biomechanics;
Bio-viscoelasticity
- From:
Chinese Journal of Stomatology
2021;56(8):764-768
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To comprehensively investigate the biomechanical properties of the temporomandibular joint (TMJ) disc and to perfect the mechanical testing system of the TMJ disc by conducting tests of compression, tension, cyclic compression, cyclic tension, creep and friction.Methods:Fifteen fresh goat heads (weighing 2.5-3.0 kg) were purchased from the market. They were all ordinary goats (9-12 months old, body weighing 18-21 kg) regardless of gender. Bilateral articular discs (a total of 30) were dissected within 30 minutes after execution. According to the national standard for mechanical testing of viscoelastic materials, fresh TMJ disc specimens of goat were prepared and tests were carried out in physiological conditions. The universal mechanical testing machine was utilized to test biomechanical properties of TMJ discs.Results:The compressive modulus of TMJ discs was (8.41±2.12) MPa and the tensile modulus was (9.54± 3.26) MPa. The mechanical characteristics would be irreversibly altered once the load exceeded the physiological range. In addition, it underwent apparent creep relaxation under continuous strain (0.5 MPa or 3.0 MPa) and the surface friction coefficient of the TMJ discs (0.015+0.011) was much lower than that of general viscoelastic materials.Conclusions:The TMJ disc was a bio-viscoelastic structure with excellent tensile and compressive properties and its surface was extremely smooth in wet conditions.
