Occlusion 1

Question 1

What is intercuspal position?

how do you record it on wax?

Answer 1

the relationship of the teeth when they are maximally interdigitated
bite all the way through

Question 2

What is retruded contact position ?

Answer 2

the first tooth to contact on the retruded arc of closure

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Question 3

What position does the mandible close in ?

Answer 3

terminal hinge axis position

Question 4

what is centric relation ?

Answer 4

an orthopedic position indépendant of tooth contact
the condyle articulates in the anterior-superior position
against the posterior slopes of the articular eminence

Question 5

when is centric relation commonly used?

Answer 5

reorganising occlusion

Question 6

what is over jet

Answer 6

overlap in a horizontal plane

Question 7

what is overbite

Answer 7

overlap on a vertical plane

Question 8

what is resting occlusal dimension

Answer 8

any 2 points measured with the presence of freeway space

this will be effected by posture

Question 9

what is freeway space?

Answer 9

space measured between teeth and mandible at rest

Question 10

mandibular movement, what is

• rotation
• translation

Answer 10

R- the movement about an axis

T- bodily movement of mandible in any direction- protrusive or lateral

Question 11

What is the working side?

Answer 11

The side the mandible moves towards on lateral excursive movements
the condyle on this side is vertically rotated

Question 12

What is the non working side

Answer 12

the side the mandible moves away from on lateral excursion

progressive side shift is in the path on non-working side

Question 13

what is Bennet angle ?

Answer 13

the angle formed between the sagittal plane and the average path of the advancing condyle as viewed in the horizontal plane during lateral mandible movements

Question 14

if no movement what is bennets angle

Answer 14

0 degrees

Question 15

what is the condylar guidance angle ?

Answer 15

Angle between protrusive condylar path and a reference horizontal as the condylar head translates down the articular eminence

Question 16

what does the condylar guidance angle relate to?

Answer 16

The articulators condylar guidance angle

Question 17

what is the retruded arc of closure?

Answer 17

the rotational movement of the mandible when the condyles are seated in centric rotation

Question 18

Anterior(protrusive) guidance

Answer 18

the influence of the contacting anterior teeth limiting mandibular movements

Question 19

What is canine guidance?

Answer 19

excursive movements of the mandible are influenced by the horizontal and vertical overlap of the canine teeth which disclose the posterior teeth

Question 20

what is group function?

Answer 20

multiple contacts between the mandibular and maxillary teeth in lateral movement on the working side.
simultaneous contact of multiple teeth act as a group to distribute occlusal force

Question 21

what is deflective contact ?

Answer 21

An occlusal contact which alters the direction of mandibular movement during closure into the intercuspal position

Question 22

what is occlusal interference?

Answer 22

any tooth that inhibits the remaining occluding surfaces from achieving stable contacts

Question 23

what is a border movement ?

what does it form

Answer 23

the movement of the mandible to any extreme of its range

forms posselts envelope

Question 24

What is carried out in the functional pathway

Answer 24

chewing and swallowing

Question 25

What are the posterior occlusal contacts

ie functional and non-functional cusps

Answer 25

Functional cusp = if no cross bite palatal cusp of the maxillary posterior teeth
buccal cusps of the mandibular posterior teeth make contact when closing in ICP with the fossa or the marginal ridge of the opposing teeth

Question 26

What is mutually protective occlusion / articulation?

Answer 26

the teeth are in groups for mutual protection

on closing into ICP there is bilateral stimulated even contacts on squeezing the posterior teeth together which taken the force down the long-axis of the tooth

other anterior teeth have light contacts and are not subject to heavy biting forces in ICP

in excursive movement the posterior teeth do not touch and are protected

Question 27

what is canine guidance occlusion-

Answer 27

all posterior tooth movement is guided by canines

this may be due to a large canine ramp