Jaw relation

Question 1

What are the 6 steps of recording jaw relation

Answer 1

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

Question 2

Height of the maxillary rim depends on

Answer 2

1- lip line
2-interpupalry line
3- ala tragus line

Question 3

Hight of the mx rim should be

Answer 3

1-2 mm below the lip line

Question 4

What is campers plane used for?

Answer 4

It’s used as a reference for posterior orientation of the occ plane

Question 5

Md anterior occ rim should be

Answer 5

At the level of vermilion broder

Question 6

Md post rim should be

Answer 6

At the 2\3 of the retromolar pad depending on the residoal ridge height

Question 7

VD of the face used for what

Answer 7

To determine the space between the mx and md arches

Question 8

How do we record the VD before extraction?

Answer 8

1- cast
2-wire
3-profile immpr
4-photograph
5-profile cephalostat

Question 9

How do we record the VD after extraction?

Answer 9

1-facial appearance and measurments
2- paitent’s memory
3-phonatics
4-mastication
5-degl
6-rest position

Question 10

Space between the mx and md when the md on a rest position?

Answer 10

Free way space or inter occlusal clearance

Question 11

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.

Answer 11

Low VDO

Question 12

High VDO

Answer 12

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

Question 13

individual can make any mandibular movements from

Answer 13

Centric jaw relation

Question 14

Methods to guide the mandible in centric
relation

Answer 14

1. Tongue retrusion
2. Swallowing
3. Fatigue
4. Relaxation
5. The operator’s fingers
6. Head position

Question 15

Inverted hand to stablize the mx and the other hand on the symphisis of the md using the thumb

Answer 15

Chin push guidance

Question 16

What is the issue with the CPG

Answer 16

The amount of the force and the direction of it

Question 17

Bimanual guidance - Dawson (1974)

Answer 17

4 fingers on the post of the md pushing it upward and the 2 thumbs on the chin pushing it downward

Question 18

Whats the disadvantages of the active technique ( tounge retrution)

Answer 18

1- least reproducible
2- muscle activity changes

Question 19

Methods for the determination of centric
relation

Answer 19

1- wax wafer method
2- terminal hinge method
3-excursive method
4-chew in method

Question 20

Methods of recording Eccentric jaw relationships

Answer 20

1- wax wafer method
2-graphic tracing method or Excursive method