PROS EXAM Flashcards
Kennedy classification?
Class 1
Kennedy classification?
Class 1
Class II
Class III
Class IV (4)
When clasping ____ is required in order to prevent tooth movement
a reciprocal component
Mid palatal bar requirements
7-12mm
Where should a gingivally approaching clasp be positioned?
On or below the survey line
Why might an I bar clasp be used instead of a T clasp?
Gives less stress on the tooth
Ring clasp goes right round the tooth but doesn’t
join
The dental bar crown height required
9mm (bar is 5mm and clearance of 2mm)
Lingual bar space from the sulcus depth requirements
7mm (3.5mm from gingival margin and 3.5mm bar width)
What do the cummer arms on the lingual bar do?
dental bars are more ____ but require _____ dentition.
dental bars are more hygenic as frees up gingiva and lingual mucosa, but require non-spaced dentition (as would be visible from behind).
CoCr clasp undercut
0.25mm
Stainless steel clasp
0.5mm
Gold clasp undercut
0.75mm
The terminal third of the clasp will finish…
Where the ledge of the gauge barrel touches the tooth when slid up against it
Plane line articulator
Average value articulator
Semi adjustable with face bow (see measurements on it everywhere)
What’s denoted by A?
Piston with the acrylic in and tighten the handle on the top to inject the acrylic into the flask
What technique is being used here and what is denoted by A?
Dough packing
A = flash
What technique has been used for both of these dentures?
LHS - injection moulded
A - dough packing
Pin not touching causing open bite —> will need to grind this down at the chair.
What is visible on this and why?
Contraction porosity - lack of pressure on the acrylic, failure to apply this when turning the clamps.
Small holes all the way through the acrylic
What is visible on this and why?
Gaseous porosity cause by wrong curing cycle.
Too rapid heating when processing the denture (porosity is found in the thickest part of the denture).
Did you get them right?
What’s the foxe’s bite plane for?
When would you rebase a denture and how?
Remove undercuts from the denture
Closed bite technique avoids occlusal errors such as an open bite
