please help me explain this---dental anatomy

[danyjose]

lingual cusp of mandibular 1st molar must be restored to accomodate?
working movement
centric relation
non working movemnt
protrusive

the answer given is working movment . is that true? if so i really appreciate an explanation

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[dr.internationa]

i thought the answer was 'non-working movt'..since mand lingual cusps are balancing cusps! ANYBODY ????

 

[bombshell]

It is true. It's indeed the working movement (the question is from some released papers, that i have looked through).
To understand it, for example move your mandible to the right side. you should feel how the max lingual cusps slide over the inner side of the Lingual cusp inclines of the mand. teeth until the teeth are "cusp against cusp" (i am only talking about the right side to where you deviated your jaw). so it is indeed the working movement. Hope it helps! Good luck

lingual cusp of mandibular 1st molar must be restored to accomodate?
working movement
centric relation
non working movemnt
protrusive

the answer given is working movment . is that true? if so i really appreciate an explanation
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[lotexigeus]

yup it's working.

In nonworking the lingual cusp has no contact with the maxillary tooth. They should immediately disclude. Same with protrusive.
In centric relation, there is no contact to begin with.

 

[danyjose]

thanks a lot for the response all,,,i am so grateful to u all