mandibular movement

Question 1

inital movement

Answer 1

1) pure hinge movement

Question 2

after opening the mouth

Answer 2

1) jaw translates

Question 3

protrustion

Answer 3

1) mostly translation

Question 4

lateral movement

Answer 4

1) some rotation, some translation in various axes
2) working side is laterotrusive (rotating)
3) nonworking side is mediotrusive (orbiting)

Question 5

condyle disc ligaments

Answer 5

1) slack in collateral ligaments and shape of medial wall may allow some medial/lateral freedom at condyle articular disc mandibular fossa area

Question 6

immediate mandibular lateral translation

Answer 6

1) bennett movement / immediate side shift
2) immediate lateral translation on working side during lateral movement
- also has lateroretrusion, etc. etc.
3) 0-3 mm, mean 1 mm

Question 7

if >1 mm imddiate lateral translation

Answer 7

1) posterior cusps short
2) central groove wide
3) reduce interference

Question 8

laterosurtrusion

Answer 8

1) shifts up and out
2) posterior cusps are short

Question 9

laterodetrusion

Answer 9

1) shifts down and out
3) posterior cusps are long

Question 10

bennet angle

Answer 10

1) difference between straight protrusive and laterotrusive movement on the non working condyle

Question 11

condylar guidance

Answer 11

1) slope of articular eminence
2) 20 to 30 steeper than occlusal plane
3) condylar path is curved (10 mm radius)
4) dentist cannot change

Question 12

christensens pehnomenon

Answer 12

1) gap occurring in opposing posterior teeth in dentate patients or occlusal wax rim
- depends on how steep the articular eminence is

Question 13

functional horizontal overlap

Answer 13

1) 0-0.5 mm ideal

Question 14

functional vertical overlap

Answer 14

1) 1 mm ideal

Question 15

neuromuscular system

Answer 15

1_ position of the mandible and its movement

Question 16

articulator

Answer 16

1) non adjustable
2) semi adjustable
3) fully adjustable
–
1) open or closed track
-
1) arcon or non arcon
-
1) average value means the mounting of dentition is close to the skull position

Question 17

fully adjustable

Answer 17

1) reall complicated, dont need to use this

Question 18

dentofacial analyzers

Answer 18

1) esthetic cross ref
2) fox plane
4) kois dentofacial analyzer
4) arbitrary face bows how orient teeth to facial plane
- also virtual facebow

Question 19

measure condylar duidance

Answer 19

1) lateral records
2) pentographic tracing and electronic pantographs

Question 20

incisal guide table

Answer 20

1) custom, mechanical, virtual incisal guide table

Question 21

alginate

Answer 21

1)1 pouch with 50 ml water