Quiz 3 stuff - intro to occlusion Flashcards
Condyle
Be able to describe convexity of mandib. condyle
allows movement of bone. Important feature of mandible. Allows movement of mandible.
Which structures lay above the condyle?
Temporal Bone, then glenoid fossa, then articular eminence, then condyle
The great alex chin
TMJ made of
Temporal bone and mandible.
condyle articulates within Glenoid fossa. Anterior to glenoid fossa = articular eminence.
Articular Disc: what its made of and function
Fibrocartilagenous structure
Dense fibrous CT
Allows for ginglymoarthrodial movement.
Condyle starts to slide down when you open wide. If you have click / pop, condyle is not moving together with disc. DISC SHUD BE TRAVELLING ALONG CONDYLE
Muscles of Mastication
My mom tells susan da love
Masssater
Medial Pterygoid
Temporalis
Supra and infrahyroid
Digastric
Lateral Pterygoid
Masseter facts and location
Masseter widens when you bite down. Helps chew by closing mandible
Strongest muscle of mastication
Superficial and Deep
Elevation (closure) of mandible
Temporalis
Assists Masseter. Widens when you bite down. (Where ur temples are)
Elevation of mandible anterior+medial , retrusion of mandible posterior.
Closure and retrusion.
Medial Pterygoid
Elevation (closure) of mandible
Pretty much same function as masseter, its just internal
Lateral Pterygoid***
Slide jaw forward = this
slide jaw back. temporalis
they oppose each other to some degree
protrusion of mandible (bilateral)
Lateral movement of mandible (unilateral)
Translates articular disc
allows movement of jaw, the mandible, downward and forward.
BRINGS JAW FORWARD. PROTRUSION OF MANDIBLE!!!
Supra and Infrahyroid + Digastric
Depression (opening) of mandible
Activation of both lateral pterygoids results in ____.
Activation of the posterior temporalis results in ___.
Chewing on right side leads to activation of ____.
protrusion
retrusion
activates left lateral pteryoid
Activation of one lateral pterygoid results in _____.
Activation of left lateral pterygoid results in movement of ____.
Lateral translation
Mandible to the right
Which one does not help the closure of the mandible?
Masseter
Temporalis
Medial Pterygoid
Lateral Pterygoid
Masseter
Temporalis
Medial Pterygoid
Lateral Pterygoid ***
At physiologic rest… tooth contact should / should not occur
should not occur.
Contact should ideally happen only during chewing.
Maximal Intercuspal Position (MIP)
The complete intercuspation of opposing teeth
Closest possible relationship between teeth
“tightest” contacts
MIP= relationship between maxillary and mandibular teeth when they are the closest they can possibly be.
So MIP is when you bite down all the way gently.
