Ashman review

Question 1

what happens at the condyles in the early stages of opening the mouth

Answer 1

pure rotation at the condyles

Question 2

what happens at the condyles in the late stages of opening the mouth

Answer 2

translation

Question 3

what do you look for to determine if you have a class 1 occlusion (angles class of occlusion)

Answer 3

in class 1 occlusion the MB cusp of the maxillary 1st molar should rest in the MB groove of the mandibular 1st molar

Question 4

What is the position of the condyles when you are in CR (centric realtion)

Answer 4

they are UNRESTRAINED in the superior posterior part of the glenoid fossa

Question 5

is CR a cuspal relationship

Answer 5

no, it is a skeletal position and is totally independent of tooth contacts

Question 6

what is CO (centric occlusion)

Answer 6

maximum intercuspation

Question 7

concerning posselts envelope of motion, when do you have the smallest vertical dimension

Answer 7

when you are in CO

Question 8

concerning posselts envelope of motion, what happens to your vertical dimension when you move from CO in a protrusive motion

Answer 8

your vertical dimension increases

Question 9

concerning posselts envelope of motion, what happens to your vertical dimension when you move from CO in a retrusive motion

Answer 9

your vertical dimension increases

Question 10

what is the curve of spee

Answer 10

the anterior to posterior curve of the teeth seen from the sagittal plane

Question 11

what is the curve of wilson

Answer 11

the right to left curve of the teeth seen from the frontal plane

Question 12

what is a combination of the curve of spee and curve of wlison

Answer 12

the sphere of monson (said you could put an 8” diameter ball on the mandible and it would touch each cusp tip)

Question 13

what is christensens phenomenon

Answer 13

the fact that when you do a protrusive movement, your incisors remain in contact but your posterior teeth separate from each other.

Question 14

what causes christensens phenomenon

Answer 14

the angle of the articular eminence of the temporal bone. when the condyle translates out of the glenoid fossa it goes down along the articular eminence. this depression causes the gap between posterior teeth

Question 15

the larger the gap between the posterior teeth in a protrusive movement, the _____ the angle of the articular eminence

Answer 15

steeper

Question 16

what are other names for the bennett movement

Answer 16

lateral side shift

lateral mandibular translation

Question 17

in a bennett movement what happens with the condyle on the working side

Answer 17

the working side condyle rotates (eventually it will also translate)

Question 18

in a bennett movement what happens with the condyle on the non-working side

Answer 18

it translates

Question 19

there will be a picture of the articulators analog of the medial wall of the glenoid fossa, what is the angle of that wall associated with

Answer 19

the bennett angle

Question 20

what on the articulator is the analog of the condyle

Answer 20

the brass ball

Question 21

what is the brass ball of the articulator the analog of

Answer 21

the condyle

Question 22

before putting the alginate impression and tray into the mouth of a patient, what must you check for in their mouth

Answer 22

tori

Question 23

should you make sure that a patient doesn’t have stuff in their teeth before taking an alginate impression

Answer 23

yes

Question 24

what do you do with your impressions if you have a patient with heavy calculus

Answer 24

take an impression with the calculus, and take one after the calculus has been removed to show the patient the difference

Question 25

What is the formula for gypsum you need to know

Answer 25

CaSO4*1/2H2O + 1.5H2O --> CaSO4 * 2H2O + heat I think its the only option with CaSO4

Question 26

what are some various uses of gypsum products

Answer 26

1. used as the investment in lost wax products 2. plaster for impressions for a complete denture 3. make casts (not flexable)

Question 27

what do you need to remember about taking alginate impressions out of a patients mouth

Answer 27

You need to SNAP it out quickly, if you don't it can mess with the modulus of elasticity (make it less accurate)

Question 28

what should you have the patient do when you are removing an alginate impression from their mouth

Answer 28

relax with their mouth half open

Question 29

what can you do to increase the setting time of your alginate

Answer 29

use cold water

Question 30

what are the 4 primary muscles of mastication

Answer 30

masseter temporalis lateral pterygoid medial pterygoid

Question 31

which muscle is the only depressor of the mandible

Answer 31

the lateral pterygoid

Question 32

which muscles elevate the mandible

Answer 32

masseter temporalis medial pterygoid

Question 33

where do you put the excess alginate you have mixed

Answer 33

in the trash, not the sink

Question 34

is alginate reversable or irreversable hydrocolloid

Answer 34

irreversable hydrocolloid

Question 35

what type of reaction is the alginate reaction

Answer 35

chemical

Question 36

(picture or the T-bar) what is the T-bar used for

Answer 36

to hold up the bite fork when you are setting up your maxillary cast for mounting

Question 37

what type of joint is the TMJ

Answer 37

a giglymoarthroidal joint

Question 38

what is a ginglymoarthroidal joint

Answer 38

a joint that both glides/slides, and rotates

Question 39

are crowns made on small articulators, or on articulators that are closer to the size of the patients skull more accurate

Answer 39

those that are larger are more accurate (you will have to make less adjustments on crowns made on larger articulators than those made on small articulators)

Question 40

what happens with the disk of the TMJ in a healthy TMJ when the mouth opens widely

Answer 40

it pulls foreward with the condyle, and stays between it and the articular eminence

Question 41

what is the #1 goal is restorative dentistry

Answer 41

not to introduce any interferences into the patients mouth

Question 42

what are the possible outcomes if there are interferences put into a patients mouth

Answer 42

small interferences - the patient may adapt | larger ones - the patient will not adapt and this will cause problems if not corrected

Question 43

why do we use the articulator when doing restorative dentistry

Answer 43

so that we have fewer and smaller interferences

Question 44

what bite record do you need to set the condylar guidance angle

Answer 44

the protrusive bite record

Question 45

what happens to your alginate if you have a high guluronate to mannuronate ratio

Answer 45

it will be strong and brittle

Question 46

what happens to your alginate if you have a high mannuronate to guluronate ratio

Answer 46

it will be weak and elastic