Jaw relation Flashcards
What are the 6 steps of recording jaw relation
1- check the denture foundation
2- check the facial contour and occlusioal plane
3-face bow and mounting mx cast
4-vertical dimension of occlusal
5- centric relation and mounting md cast
6-ecentric relation
Height of the maxillary rim depends on
1- lip line
2-interpupalry line
3- ala tragus line
Hight of the mx rim should be
1-2 mm below the lip line
What is campers plane used for?
It’s used as a reference for posterior orientation of the occ plane
Md anterior occ rim should be
At the level of vermilion broder
Md post rim should be
At the 2\3 of the retromolar pad depending on the residoal ridge height
VD of the face used for what
To determine the space between the mx and md arches
How do we record the VD before extraction?
1- cast
2-wire
3-profile immpr
4-photograph
5-profile cephalostat
How do we record the VD after extraction?
1-facial appearance and measurments
2- paitent’s memory
3-phonatics
4-mastication
5-degl
6-rest position
Space between the mx and md when the md on a rest position?
Free way space or inter occlusal clearance
1-Poor esthetics:-
• chin nose approximation.
• lose of muscle tone.
• vermillion border reduce.
• tooth are not visible.
• 2-Loss of biting power.
• 3-Cheek biting
• 4-Angular cheilities.
• 5-TMJ troubles.
Low VDO
High VDO
1- facial inharmmony
2-unnaturally separated lips
3- muscle fatigue
4- difficulty in swallowing and gagging
5-speech problems
6- bone resorption
7- pain in the supporting structure and tmj
individual can make any mandibular movements from
Centric jaw relation
Methods to guide the mandible in centric
relation
- Tongue retrusion
- Swallowing
- Fatigue
- Relaxation
- The operator’s fingers
- Head position
Inverted hand to stablize the mx and the other hand on the symphisis of the md using the thumb
Chin push guidance
