Occlusion 3 Flashcards
what are the 3 types of articulator
arcon
average value
semi adjustable
what are the parts of the facebow
reference plane locator
bite fork
transfer jig assembly
earbow
where should the anterior reference point for the facebow go
43mm apical to incisal edge of anterior teeth
position of infraorbital foramen
what do you use to mark the anterior reference point
reference plane locator and marker
what do you apply to bite fork
bite registration paste
what do you do when the bite registration paste is in the bite fork
firmly seat to record cusp tips of maxillary teeth
what does the bite fork impression allow
accurate repositioning and mounting of maxillary cast
what does the facebow record
relationship of maxilla to hinge axis of rotation of mandible
what does the facebow allow
mounting of maxillary cast on articulator
how do you mount the lower cast
an interocclusal registration
what are the two types of interocclusal registration you can use to mount the lower cast
ICP
RCP
when would you use wax to record ICP
if ICP not obvious to technician
when would you use paste to record ICP
if ICP not obvious to technician
when would you use record blocks to record ICP
free end saddles
cannot be hand articulated
when would you not use any material to record ICP
if there are plenty of tooth contacts and ICP is obvious to technician
what is the simplest approach to mounting casts
using ICP registration without OVD increased
conformative approach
what are the 2 reorganised approaches
ICP registration with OVD increase
RCP registration with/without OVD increase
what is an unorganised approach
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
what is the conformative approach
provision of restorations in harmony with existing jaw relationships
when would we not use the conformative approach
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
when would you use a reorganised approach
when you plan to provide new restorations to a different occlusion
ICP non-existent
need space to place restorations
RCP reproducible position of mandible
what are the reliable techniques to place a patient into RCP
bimanual manipulation
chin point guidance
chin point guidance with anterior jig
at what angle is RCP record taken at
slightly increased OVD just prior to initial tooth contact
what is the space between RCP and retruded axis position on posselts envelope known as
retruded arc of closure
where does initial tooth contact in RCP occur on posselts envelope
any point on retruded arc of closure
what type of guidance does a mutually protected occlusion have
canine guidance
