Occlusion for Conventional Dentures Flashcards
what are the 7 steps of a jaw registration?
- adjust upper record block for retention
- adjust upper record block for tooth position
- adjust upper record block for occlusal planes
- lower tooth position & horizontal jaw relationship
- measure vertical dimension & establish face height
- record registration
- select shade, mould & setting
What can occur if there is overextension of the peripheries of an upper record block?
loss of retention
what does LIMBO stand for?
- lip support
- incisal level
- midline
- buccal corridor
- occlusal plane
When adjusting an upper record block for tooth position, what should be done first?
Examine current denture
- what is patients opinion on current tooth show
- modify or keep
- is it age appropriate
What is the recommended nasiolabial angle to achieve?
90 degrees
What is the only fixed point in the upper dentition?
Incisive papilla
How far should incisors be from the incisive papilla?
approx. 5mm
How much of the teeth do you wan to show approx?
1-2mm of show
What marks are placed on the record block?
- midline
- lip line
- canine line
What should the Fox’s Bite Plane align with anteriorly?
Interpupillary line
What should the Fox’s Bite Plane align with posteriorly/laterally?
ala-tragus line
What will occur if teeth & buccal flange of denture are too close to cheek?
Denture dislodges with cheek movement
what occurs if the denture sits lingually?
tongue lifts denture when moves
What is the OVD?
Occlusal Vertical Dimension
- the distance between a set point on the maxilla and a set point on the mandible when the teeth are in maximum intercuspation
What is the RVD?
Resting Vertical Dimension
- when the mandible is at rest with patient upright **
What occurs if the FWS is excessive?
- reduced masticatory efficiency
- overclosed facial appearance & cheek biting
- TMJ symptoms
What can overclosed facial appearance cause?
angular cheilitis
What occurs if there is a reduced/inadequate FWS?
- excessive load on denture bearing area
- continuous muscular activity results in pain
- aesthetic complaints
- noisy dentures
How is vertical dimension/face height measured?
Willis Bite Gauge or Dividers
How is the registration recorded?
- cut notches on upper & lower blocks
- use wax or jaw reg paste and apply to occlusal surfaces
- get patient to bit together until set
