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Hey folks, I have a few questions regarding the bony/nondental articulation of the tmj.
1-what is a "sheer force" in the context of tmj biomechanics?
2-what is the articular disc space? What are its boundaries?
3-are the discal ligaments continuous posteriorly with the inferior retrodiscal lamina?
4-in a lateral excursion, we call the antero-inferior path of the balancing/nonworking condyle: translation. What do we call its medial movement, which forms the bennet angle? Also translation?
5-in mandibular depression, once hinge movement is exhausted, translation ensues. Is the mandibular ramus "rotating" while the condyle is "gliding" during the translation? If it is not rotating during translation, then is there a rotational phase that involves the ramus after translation? If there is, then opening becomes 1-condylar rotation 2-condylar translation 3-ramus rotation….????
6-what is the meaning of "joint stability"? what is joint stability during movement and during rest (just muscle tonus)? why is "constant contact"? important for "joint stability"? what are the structures involved in this "constant contact"?
7-the interarticular pressure is high in centric occlusion and low in resting position. is it high or low in maximal oppening?
Answers to one, two or more of these questions would be greatly appreciated.
Also, if you attempt to answer, indicate whether you're sure or not so sure about the answers.
Thank you
1-what is a "sheer force" in the context of tmj biomechanics?
2-what is the articular disc space? What are its boundaries?
3-are the discal ligaments continuous posteriorly with the inferior retrodiscal lamina?
4-in a lateral excursion, we call the antero-inferior path of the balancing/nonworking condyle: translation. What do we call its medial movement, which forms the bennet angle? Also translation?
5-in mandibular depression, once hinge movement is exhausted, translation ensues. Is the mandibular ramus "rotating" while the condyle is "gliding" during the translation? If it is not rotating during translation, then is there a rotational phase that involves the ramus after translation? If there is, then opening becomes 1-condylar rotation 2-condylar translation 3-ramus rotation….????
6-what is the meaning of "joint stability"? what is joint stability during movement and during rest (just muscle tonus)? why is "constant contact"? important for "joint stability"? what are the structures involved in this "constant contact"?
7-the interarticular pressure is high in centric occlusion and low in resting position. is it high or low in maximal oppening?
Answers to one, two or more of these questions would be greatly appreciated.
Also, if you attempt to answer, indicate whether you're sure or not so sure about the answers.
Thank you
