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please answer this qs from prostho

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godbless

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how is it possible that decreased vertical dimension of occlusion means an increase in the interocclusal distance when mandible is in rest position?
shudnt the dec in vertical dimension mean dec in IOD also???
can somone please explain this?????
 

Lilbullgrl

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Hi,
Interocclusal distance is another word for "freeway space",
Increased VDO=Decreased freeway space
and Decreased VDO=Increased FWS

Decreased VDO means the teeth are too small and thus FWS increases in rest position and viceversa
Hope it made sense.
 

Stelon

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this is the equation :
Vertical dimension at occlusion + free way space ( interocclusal distance ) = vertical dimension at rest.

Vertical dimension at rest remains constant for particular patient. so if vd at occlusion is decreased free way space or interocclusal distance will be increased.
 

dr.jones

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decreased vertical dimension could be due to attrided teeth...and since vertical dimension at rest remains the same,it would just mean more interocclusal space...more open space.
 
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