what are the stages of denture making? (5)
- 1st imps
- 2nd imps
- occlusion
- try in
- fit
what anatomical difficulty can give issues to the denture making process? (2)
tori
flabby ridge
reline/rebase full and partial dentures
- What is the difference in the steps? (3)
full
- take wash imps only
partial
- take wash imps +
- alginate over denture
-/f denture retention is affected by? (2)
- extension
- position of teeth in neutral zone
if tooth preparation is required for denture, when should the prep by then?
before 2nd imps
what are the steps for a f/f replica?
- 1st appt (4)
- 2nd appt (3)
- 3rd appt (1)
- 4th appt (1)
1st imps
- putty on tray and insert f/f
- create notches on putty
- place another putty over denture
- prescribe for wax block with SHELLAC base
2nd imps
- adjust occlusion
- wash imps
- choose shade and shape
try in
fit
what is the ideal FWS?
2-3mm
what is checked during occlusion stage? (3)
- occlusal plane level (runs)
- labial fullness
- mark midline
what is checked during try in? (6)
adaptation extensions runs appearance labial fullness occlusion
what is the ideal post-dam thickness? (2)
- 5mm when palate is compressible
0. 25mm if there is a palatal tori
what are the types of impression taking techniques?
closed mouth
open mouth
clasps used in partial dentures.
- types (2)
- material (2)
- when to use (2)
occlusal approaching
- CoCr
- provides bracing
gingival approaching
- stainless steel
- more aesthetic
what is the definition of
- retention
- support
- stability
retention
- resistance to vertical displacement away from denture bearing area
support
- resistance to vertical force of occlusion
stability
- resistance to lateral displacement during function
what tooth preps can be made as part of denture design?
rest seats
creating undercuts
for 2nd imps, how much space is needed for alginate shellac base for an accurate impression?
3mm
what is checked during the try in stage? (4)
adaptation
retention
extension
appearance
what is the purpose of a facebow?
transfer relationship of maxillary arch and TMJ to cast
facebow
- types (2)
- what is it (2)
- where is the locating point (2)
kinematics
- more accurate and complex
- locates terminal hinge axis of condylar rotation.
arbitrary or “earbow”
- more commonly used
- uses ear as locating point
articulars
- types (3)
- simple hinge
- semi adjustable
- fully adjustable
what is Bennet’s movement? (3)
- lateral translation of mandible
- working side moves laterally
- non working side moves forward
what is average Bennet’s angle?
8 degrees
semi-adjustable
- types? (2)
- difference? (2)
arcon
- resembles TMJ
- fixed glenoid fossa, movable lower joint
non-arcon
- reverse TMJ
- vice versa.
Difference between full and semi adjustable articular?
fully adjustable
- lateral condylar path inclinations are adjusted according to records taken from pt.
what is the
- curve of spee (2)
- curve of wilson (2)
spee
- anatomical curvature of occlusal alignment of teeth.
- tip of incisors - buccal cusp of premolars/molars - anterior border of ramus
wilson
- across arch curvature or posterior occlusal plane
