occlusion quiz

Question 1

facebow registration

1. transfers the relationship between the maxillary teeth and the axis of mandiblar rotation
2. transfers the relationship between the mandibular teeth and the axis of mandibular rotation
3. used to mount lower cast
4. registers the relationship between upper and lower teeth
5. registers the posisiton of mandible in protrusion

Answer 1

1.

transfers the relationship between the maxillary teeth and the axis of mandibular rotation

Question 2

function of facebow

1. mounting the lower cast
2. registration of the inter-occlusal relationship
3. setting the condylar guidance angles
4. setting the intercondylar distance
5. transferring the angle of the occlusal plane relative to a horizontal reference plane

Answer 2

transferring the angle of the occlusal plane relative to a horizontal reference plane

Question 3

through careful design of occlusal surfaces the property of occlusal forces the dentist is most able to influence is

1. direction
2. duration
3. frequency
4. velocity
5. magnitude

Answer 3

direction

Question 4

principal radiographic sign of occlusal trauma is

1. horizontal bone loss
2. vertical bone loss
3. root fracture
4. generalised widening of PDL space
5. condensing osteitis

Answer 4

generalised widening of PDL space

Question 5

when viewed from the lateral aspect, the downward movement of the condyle during protrusion forms an angle to the horizontal plane known as

1. horizontal condylar guidance angle
2. bennett angle
3. saggital condylar guidance angle
4. side shift
5. frankfort angle

Answer 5

saggital condylar guidance angle

Question 6

in relation to complete dentures, one of the principal objectives of jaw registration is

1. determine the intermaxillary relationship in the retruded contact position
2. to determine the intermaxillary relationshipp in the resting face height position
3. to transfer the manidbular plane
4. to determine the intermaxillary relationship in the intercuspal position
5. to record freeway space

Answer 6

determine the intermaxillary relationship in the retruded contact position

Question 7

in ICP, ideally

1. incisors should meet edge to edge
2. tips of buccal cusps of the upper posterior teeth should occlude with the occlusal surfaces of the lower posterior teeth
3. tips of the palatal cusps of the upper posterior teeth should occlude with the occlusal surfaces of the lower posterior teeth
4. tips of the lingual cusps of lower posterior teeth should occlude with the marginal ridges of the opposing teeth
5. tips of the lingual cusps of the lower posterior teeth should occlude with the fossae of the opposing teeth

Answer 7

tips of the palatal cusps of the upper posterior teeth should occlude with the occlusal surfaces of the lower posterior teeth

Question 8

during mastication, whilst chewing on the left molar teeth

1. left side in non-working side
2. bilateral downwards and forwards movement of condylar heads
3. right condylar head rotates about a vertical axis but does not move forwards onto teh articular tubercle
4. right condylar head moves downwards, forwards and medially
5. it is preferable for the mandible to be guided back into ICP by contact of an many teeth as possible

Answer 8

right condylar head moves downwards, forwards and medially

Question 9

which articulator is suitable for use when constructing complete dentures

1. simple hinge
2. fixed condylar
3. semi-adjustable
4. fully adjustable
5. all of the above

Answer 9

all of the above

(Fully adjustable, then semi, then fixed, then simple)

Question 10

what is christensen’s phonomenon

Answer 10

a gap that appears between the posterior ends of opposing flat occlusal rims when the mandible is protruded

Question 11

most unlikely consequence of adverse occlusal forces

1. fractured cusp
2. attrition
3. dislodge restorations
4. chronic periodontitis
5. increased tooth mobility

Answer 11

chronic periodontitis

Question 12

during closure of the retruded axis, the point at which the teeth contact is called

Answer 12

retruded contact position

Question 13

during lateral excursion the predominant movement of the working condyle is

1. forwards translation
2. medial translation
3. rotation about a vertical axis
4. rotation about a horizontal axis
5. vertical movement away from the fossa

Answer 13

rotation about a vertical axis

Question 14

the retruded axis is a mandibular position dependent on the presence of teeth

T/F

Answer 14

false

Question 15

the retruded axis is a border movement

T/F

Answer 15

true

Question 16

at the end of chewing cycle the manidble aims for the ICP position

T/F

Answer 16

True

Question 17

forces on teeth are greater during parafunction than function

T/F

Answer 17

true

Question 18

in canine guidance there should be some contact between teeth on the non-working side

T/F

Answer 18

false

Question 19

most restorations should be made using the reorganised approach

T/F

Answer 19

false

Question 20

in reorganised approach ICP and RCP are coincident

T/F

Answer 20

true

Question 21

when adopting a conformative approach an inter-occlusal registration is always necessary

T/F

Answer 21

false

Question 22

when adopting a reorganised approach an interocclusal registration is always necessary

T/F

Answer 22

true