occlusion Flashcards
what are the three parts of the masticatory system?
- occlusion
- TMJs
- muscles of mastication
when is occlusion important?
reduce risk of fracture/wear/failure
- restoration
when is present in the periodontal ligament which can detect materials between teeth down to 1/2 thickness of a human hair?
propiioreceptors
what does each cusp have?
- ridge
- tip
- slope
what is used to check the occlusal contacts?
articulating paper
what is the conformative approach?
keep the occlusion the same before and after restoration
what is the static occlusion?
- centric occlusion
- habitual bite
- max intercuspation
- intercuspal position (ICP)
what is the dynamic occlusion?
- mandibular eccentric movements
- lateral excursion
what is the name of the side of the jaw it moves to?
working side
what is the most common articulating paper size?
<40u
why is thin articulating paper desirable?
for a precise marking- minimise contact artefacts
what is the device which electronically records the occlusal contacts and pressure?
T scan
how is articulating paper used?
placed simultaneously on both sides to prevent displacement of the mandible
what should be used to grip the articulating paper?
miller forceps
what is important to do to teeth before using articulating paper?
dry the teeth
what colours of articulating paper is used for static occlusion?
black
what colour of articulating paper is used for dynamic occlusion?
red
what does more spread colour represent?
higher pressure
what does an area of wear near the point of occlusion mean?
patient is grinding their teeth
where does the main cusp lie in the occlusion?
in the fossa
what is the name of the upper palatal and lower buccal cusps?
functional cusps
what is tripodization?
three points of contact around a fossa for stability
what is shimstock foil?
8u thin
- indicates occlusal contact if held between teeth
Anatomy of the TMJ
