maxillo-mandibular relations Part I

Question 1

what is the posterio palatal seal

Answer 1

a raised acrylic resin area of the posterior border of maxillary denture

Question 2

what is the roll of the posterior palatal seal

Answer 2

enhance retention and maintains peripheral seal

Question 3

how does the posterior palatal seal retain and maintain the peripheral seal

Answer 3

compensates for polymerization shrinkage

Minor denture base functional movement

Question 4

what is the junction between the mobile and non-mobile portion of the soft palate

Answer 4

Vibrating ling

Question 5

how much does acrylic resin shrink during curring

Answer 5

7%

Question 6

what is the point of record bases and wax rims

Answer 6

Establish VDO
record maxilar mandibular relationship and guide tooth position
determine position and arangement of denture teeth

Question 7

what must be done to ensure denture occlusion balance

Answer 7

transfer of patients maxillo-mandibular relationship to articulator

Question 8

what is a record base

Answer 8

An interim denture base used to support the record rim material for recording maxillo-mandibular records

Question 9

what is an occlusion wax rims

Answer 9

Occluding surface fabricated on record bases for purposes of making MMR and arranging denture teeth

Question 10

what do record bases and occlusion wax rims allow for

Answer 10

establish facial contours by providng proper support for lips and cheeks
aid in orientation in occlusal plane
Aid in tooth selectrion and anterior tooth placement
Establish and maintain the VDO
serve as a means of transfer of face bow record

Question 11

what does the temporary form of record bases and occlusion wax rims Representing base of a CD determine the relation of maxilla and mandible allow for

Answer 11

aid in tooth selection and arrangement needed to make stable interocclusal records

Question 12

how much of the vestible should be filled

Answer 12

Filled completely to enhance the peripheral seal of the record base and improve retention

Question 13

what anatomical landmarks are used for occlusal plane determination of the cast

Answer 13

crest of the ridge

Retromolar pad

Question 14

what does the retromolar pad do as a landmark

Answer 14

1/2-2/3 of the Height dictates the occlusal plane

Question 15

what does the crest of the ridge do as a land mark

Answer 15

Aligns with the central fossa of denture teeth

Question 16

what should be marked near for the retromolar pad

Answer 16

• a line on the land area that bisects the middle of the retromolar pad and is continuous with the center of the residual ridge
• mark a line of the land area the represents the mandibular occlusal plane, placed at 1/2-2/3 the height of the RMP

Question 17

what should the occlusal portion of the wax rim look like as measurements

Answer 17

Molar region: 8-10 mm
Premolar region: 5-7 mm
Anterior region: 3-5mm

Question 18

how should the occlusal portion of the wax rim be tilted

Answer 18

Just slightly anterior beyond the edge of the land area(15 degrees)

Question 19

what should the lingual contours not impinge on

Answer 19

On the tongue

Question 20

What are the heights of the maxillary occlusal wax rim

Answer 20

Frontal: 22mm
Posterior: 8mm

Question 21

what are the heights of the mandibular wax rim

Answer 21

frontal: 18mm
lateral: 2/3 height of the RMP
Posterior:1/2-2/3 up the retromolar pad

Question 22

where should the rim be centered

Answer 22

Over the crest of the ridge to maximize denture stability

Question 23

how should record bases an occlusion wax rims look when done

Answer 23

Must be stable
accurately adapted to master casts
Rigid
fully extends to the depth of the vestibule
peripheries smooth and rounded fr comfort
simular the borders and denture base of the definitive/final prosthesis

Question 24

why would a record base by loose/inacurate

Answer 24

Poor adaption to cast
excessive block out
over/under extension

Question 25

what should you do if base is slightly lose

Answer 25

Use denture adhesive

Question 26

what should you do if base is very lose

Answer 26

Remake record base

Question 27

how much wax display should there be when the wax rim is in

Answer 27

1-3mm in women

0-1mm in men

Question 28

how does display of wax rim change with age

Answer 28

Decreases:
young(F/M): 2,1
middle (F,M): 1,0
Old*F.M): 0,-1

Question 29

what should be done for the midline when using an occlusal wax rim

Answer 29

Mark by bisecting the long axis of the face(ignore nose)

Question 30

how do you check for a high lip line

Answer 30

Patient is asked to give an exagerated smile and horizontal line is scribed on the wax rim to record maximum elevation/retraction of the upper lip

Question 31

how do you mark the distal aspects of the canine

Answer 31

use the lines through the pupil
-or-
use lines extending from the ala of the nose

Question 32

where must the incisal edge of the wax rim be located

Answer 32

touch the wet dry junction (check to see if they can make F and V sounds)

Question 33

how is occlusal plane found medio-distally

Answer 33

Parallels the pupils in the anterior

Question 34

what is used to help establish occlusal plane anteriorly and posteriorly

Answer 34

Trubyte fox occlusal plane plate

Question 35

how is the occlusal plane done anterior-posterior

Answer 35

Parallel to the ala-tragus line/Camper’s line

Question 36

what is the virbating line made out of

Answer 36

Glands

Question 37

what should the patient be doing when you are looking at the wax rim

Answer 37

be involved so that they can accept denture better

Question 38

problem with facial hair when doing rims

Answer 38

can add bulk that what put in place to fight the look of no teeth

Question 39

what smile line is the most esthetic

Answer 39

A curved smile line