occlusion Flashcards
what articulator would you use for simple restorative dentistry?
simple hinge
what articulator is used for dentures?
average value
which articulator is most common for crown + bridge work?
semi-adjustable
what are the 2 varieties of semi-adjustable articulators?
arcon - condylar on lower member - like our anatomy
non-arcon - condylar on upper member
what type of articulator requires a face bow?
semi-adjustable
what is a kinematic record?
fully adjustable articulator - true hinge axis - unneccassary
what is an earbow artiuclator?
arbitrary hinge axis SA articulator
what is a kris dent-fascial analyser?
SAA using arbitrary + average values
do you use ICP or CR for single restorations?
ICP
do you use ICP or CR when occlusion reorganised?
CR
3 aspects a face bow prescribes:
- intercondylar width
- distance from condylar hinge axis
- maxillary plane in relation to the hinge axis
what feature of human anatomy makes articulators still just approx?
patient TMJ with disc and curved fossa
how should MHA + AHA relate to each other?
similar as possible
MHA = mandibular hinge axis AHA = approximated hinge axis
which cusp of upper molar sits in cusp of lower molar?
mesiopalatal
define canine guidance
when 2 canines are in contact on WS, no other teeth are in contact on NWS
4 main consequences of heavy occlusal contact
- pain from PDL/pulp
- wear
- root fracture
- Orthodontic movement
what is the point of custom incised guide plane?
uses preoperative moulds to set pathway for articulator to follow - to copy guidance
why is CR used for reorganising occlusion?
reproducible - orthopaedic position
what is RCP?
tooth tooth position at CR
what is the Dahl concept?
relative axial tooth movement - intrusion of restored teeth + extrusion of others
5 options for gaining inter-occlusal space?
- increase OVD
- Dahl concept
- Orthodontics
- preparation
- distalising mandible + equilibrating
what happens to RCP and ICP when you distalise + equilibrate the mandible?
RCP = ICP
3 scenarios that face bow would be beneficial?
- reorganising occlusion
- conforming to occlusion but restoration involved in dynamic occlusion
- creating stabilisation splint
3 components to assess on a indirect restoration before patient comes in?
what extra step do you do in the mouth?
- marginal fit
- contact tightness
- occlusion
extra step = check in dynamic occlusion
3 designs of splints
- full coverage
- partial coverage
- postural
what is a stabilisation splint? how does it work?
‘idealised occlusion’ - can be used to ‘train’ patient
deprogramming neuromuscular pathways + relax MOM (commonly lateral pterygoid)
