occlusion

Question 1

what articulator would you use for simple restorative dentistry?

Answer 1

simple hinge

Question 2

what articulator is used for dentures?

Answer 2

average value

Question 3

which articulator is most common for crown + bridge work?

Answer 3

semi-adjustable

Question 4

what are the 2 varieties of semi-adjustable articulators?

Answer 4

arcon - condylar on lower member - like our anatomy

non-arcon - condylar on upper member

Question 5

what type of articulator requires a face bow?

Answer 5

semi-adjustable

Question 6

what is a kinematic record?

Answer 6

fully adjustable articulator - true hinge axis - unneccassary

Question 7

what is an earbow artiuclator?

Answer 7

arbitrary hinge axis SA articulator

Question 8

what is a kris dent-fascial analyser?

Answer 8

SAA using arbitrary + average values

Question 9

do you use ICP or CR for single restorations?

Answer 9

ICP

Question 10

do you use ICP or CR when occlusion reorganised?

Answer 10

CR

Question 11

3 aspects a face bow prescribes:

Answer 11

1. intercondylar width
2. distance from condylar hinge axis
3. maxillary plane in relation to the hinge axis

Question 12

what feature of human anatomy makes articulators still just approx?

Answer 12

patient TMJ with disc and curved fossa

Question 13

how should MHA + AHA relate to each other?

Answer 13

similar as possible

MHA = mandibular hinge axis
AHA = approximated hinge axis

Question 14

which cusp of upper molar sits in cusp of lower molar?

Answer 14

mesiopalatal

Question 15

define canine guidance

Answer 15

when 2 canines are in contact on WS, no other teeth are in contact on NWS

Question 16

4 main consequences of heavy occlusal contact

Answer 16

1. pain from PDL/pulp
2. wear
3. root fracture
4. Orthodontic movement

Question 17

what is the point of custom incised guide plane?

Answer 17

uses preoperative moulds to set pathway for articulator to follow - to copy guidance

Question 18

why is CR used for reorganising occlusion?

Answer 18

reproducible - orthopaedic position

Question 19

what is RCP?

Answer 19

tooth tooth position at CR

Question 20

what is the Dahl concept?

Answer 20

relative axial tooth movement - intrusion of restored teeth + extrusion of others

Question 21

5 options for gaining inter-occlusal space?

Answer 21

1. increase OVD
2. Dahl concept
3. Orthodontics
4. preparation
5. distalising mandible + equilibrating

Question 22

what happens to RCP and ICP when you distalise + equilibrate the mandible?

Answer 22

RCP = ICP

Question 23

3 scenarios that face bow would be beneficial?

Answer 23

1. reorganising occlusion
2. conforming to occlusion but restoration involved in dynamic occlusion
3. creating stabilisation splint

Question 24

3 components to assess on a indirect restoration before patient comes in?

what extra step do you do in the mouth?

Answer 24

1. marginal fit
2. contact tightness
3. occlusion

extra step = check in dynamic occlusion

Question 25

3 designs of splints

Answer 25

1. full coverage
2. partial coverage
3. postural

Question 26

what is a stabilisation splint? how does it work?

Answer 26

‘idealised occlusion’ - can be used to ‘train’ patient

deprogramming neuromuscular pathways + relax MOM (commonly lateral pterygoid)