20 Questions
What does the term 'vertical dimension' refer to?
The length of the face
What acts as a vertical stop in maintaining the vertical dimension?
Tooth
What is referred to as 'Vertical dimension of rest or physiologic rest position'?
VDR
What happens if the vertical dimension is altered?
Severe discomfort in both TMJ and muscles of mastication occurs
What maintains the vertical dimension?
Occlusion of the teeth or balanced tonic contraction of mandibular muscles
What does VDO stand for?
Vertical Dimension of Occlusion
What does VDR stand for?
Vertical Dimension of Rest Position
What tends to be in a state of minimal tonic contraction in terms of musculature related to jaw relations?
Opening and closing muscles
What will happen if the joint is not measured accurately?
The joint will be strained.
Which factor is related to a patient's esthetical appearance according to jaw relations?
Vertical Dimension (VD)
What is the physiologic rest position of the mandible?
Position where the muscles are in equilibrium and the condyles are in a neutral unstrained position
What is the interocclusal distance (IOD) frequently referred to as?
Free way space
What happens when there is an increase in Vertical Dimension of Occlusion (VDO) / decrease in IOD?
Chin-nose distance increases and patients have an appearance of open mouth
What is potentially damaging to the temporomandibular joint (TMJ)?
Decrease in VDO / Increase in IOD
What is Centric Relation (CR) defined as?
"A maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective disks"
What does Centric Occlusion refer to?
A tooth to tooth relation providing maximum intercuspidation
What is the purpose of recording centric relation?
It provides a repeatable and recordable guide for developing centric occlusion in complete dentures
What is Horizontal Jaw Relation also known as?
Centric relation
What does Horizontal Jaw Relation refer to?
Relationship of mandible to maxilla in antero-posterior direction
What does Reference Relation provide?
A more definite position than vertical relation, independent of tooth contact.
Test your knowledge of jaw relations in prosthetic dentistry with this quiz. Topics include the spatial relationship of the maxilla to the mandible, vertical dimension, and occlusion of the teeth.
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