9/27 - Jaw Relation Records, Wide-Vue Flashcards
what is the purpose of muscle deprogramming
to reduce or relax muscle activity levels to eliminate muscle pain, tension, or discomfort.
deprogramming allows for accurate examination of what
relationship of maxilla to mandible with muscles relaxed and condyles in fully seated position
fixed prosth is a ___ procedure - meaning errors in any step affect the success of all subsequent procedures
SERIAL PROCEDURE
what are the muscles of mastication
masseter, medial prterygoid, temporalis, lateral pterygoid
function of masseter
- elevate mandible and approximate teeth
- intermediate and deep muscle retract mandible
- superficial fibers protrude mandible
function of medial pterygoid
- assist w/ elevation and protrusion of mandible
- assist lateral pterygoid w/ side to side mandibular motion to help with food grinding
function of temporalis
- anterior and mid fibers elevate the mandible
- posterior fibers retract the mandible
function of lateral pterygoid
- sole muscle of mastication to cause depression of mandible
- assist with protrusion and side to side movement of mandible
what are the parts of lateral pterygoid
upper and lower head
what is the muscle the frequently prevents condylar seating
lateral pterygoid
what is programmed to position the mandible to avoid pain and posterior interferences in the arc of closure
lateral pterygoid
deprogramming generally is done by placing something in the anterior that eliminates ___
posterior occlusal contact
how long to let adhesive for Clonebit set
five minutes
why should you not wait too long for adhesive to set
waiting too long will allow adhesive to dry out and lose qualities
what is used to reline the jig
clone bite (orange)
what is the first scored line on the jig
centric occlusion or max intercuspation
T/F: CR position involves teeth and is not joint related.
FALSE! CR is joint related; no teeth involved.
what is the sceond score line on the jig, posterior to the first
CR
what is the superior, anterior position of the condyles in the glenoid fossa with articular disc in between
CR record
what PVS used for CR, protrusive, and bite fork records
Regisil (purple)
what is used to set condylar inclination on articulator
protrusive registration
how many mm of protrusive movement do we want to capture
4-7 mm (grady says just basically do 5)
what happens if you capture more than 4-7 mm of protrusive movement
cause problem when setting the condylar inclination on semi-adjustable articulator
what is the third line drawn/troughed anterior to the previous two lines
protrusive
what is the purpose of the protrusive trough
allows patient to drop into protrusive while bite registration is curing
what impression material has pleasant taste and odor, non-staining, inexpensive, but has poor tear strength
alginate - irreversible hydro
why add rope wax around the periphery of the tray
- accurately capture mucobuccal fold
- increased comfort to the patient
how many thickness of rope way in posterior of tray to prevent excess alginate from going down patient’s throat
2 thick
immediately take impressions and pour within how many minutes
15 mintues
condyles are positioned at ___ mm on articulator
110 mm
(this was the only thing worth asking that’s different on Wide-Vue powerpoint)
bennet angle equation
Bennett angle for our Hanau articulator = H/8 + 12
H = eminence angle
