Occlusion 3

Question 1

what are the 3 types of articulator

Answer 1

arcon
average value
semi adjustable

Question 2

what are the parts of the facebow

Answer 2

reference plane locator
bite fork
transfer jig assembly
earbow

Question 3

where should the anterior reference point for the facebow go

Answer 3

43mm apical to incisal edge of anterior teeth
position of infraorbital foramen

Question 4

what do you use to mark the anterior reference point

Answer 4

reference plane locator and marker

Question 5

what do you apply to bite fork

Answer 5

bite registration paste

Question 6

what do you do when the bite registration paste is in the bite fork

Answer 6

firmly seat to record cusp tips of maxillary teeth

Question 7

what does the bite fork impression allow

Answer 7

accurate repositioning and mounting of maxillary cast

Question 8

what does the facebow record

Answer 8

relationship of maxilla to hinge axis of rotation of mandible

Question 9

what does the facebow allow

Answer 9

mounting of maxillary cast on articulator

Question 10

how do you mount the lower cast

Answer 10

an interocclusal registration

Question 11

what are the two types of interocclusal registration you can use to mount the lower cast

Answer 11

ICP
RCP

Question 12

when would you use wax to record ICP

Answer 12

if ICP not obvious to technician

Question 13

when would you use paste to record ICP

Answer 13

if ICP not obvious to technician

Question 14

when would you use record blocks to record ICP

Answer 14

free end saddles
cannot be hand articulated

Question 15

when would you not use any material to record ICP

Answer 15

if there are plenty of tooth contacts and ICP is obvious to technician

Question 16

what is the simplest approach to mounting casts

Answer 16

using ICP registration without OVD increased
conformative approach

Question 17

what are the 2 reorganised approaches

Answer 17

ICP registration with OVD increase
RCP registration with/without OVD increase

Question 18

what is an unorganised approach

Answer 18

havent assessed occlusion before starting restoration
change occlusion with restoration
havent planned where ICP will be
provide an occlusion which does not conform to previous one

Question 19

what is the conformative approach

Answer 19

provision of restorations in harmony with existing jaw relationships

Question 20

when would we not use the conformative approach

Answer 20

an increase in vertical height needed
tooth/teeth out of position
change in appearance wanted
history of occlusally related failure or fracture of existing restorations

Question 21

when would you use a reorganised approach

Answer 21

when you plan to provide new restorations to a different occlusion
ICP non-existent
need space to place restorations
RCP reproducible position of mandible

Question 22

what are the reliable techniques to place a patient into RCP

Answer 22

bimanual manipulation
chin point guidance
chin point guidance with anterior jig

Question 23

at what angle is RCP record taken at

Answer 23

slightly increased OVD just prior to initial tooth contact

Question 24

what is the space between RCP and retruded axis position on posselts envelope known as

Answer 24

retruded arc of closure

Question 25

where does initial tooth contact in RCP occur on posselts envelope

Answer 25

any point on retruded arc of closure

Question 26

what type of guidance does a mutually protected occlusion have

Answer 26

canine guidance