RPD2 week 5
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RPD2 week 5
RPD2 week 5
Describe the sequential procedures during RPD delivery appointment
achieve good fit, adaptation, and occlusion
Tissue surface refinement (PIP)
Periphery refinement (disclosing wax)
Occlusion refinement (clinical remount and occlusal equilibration)
-First obtain jaw record (face bow +CR record)
alginate pick-up impression is made with RPD in place in the mouth and removed with the RPD embedded in the impression.
•What is a pick-up impression for RPD
alginate impression with RPD embedded to Generate a remount cast for RPD
pick up the prosthesis and record the remaining teeth.
•How to generate a remount cast for RPD
stock tray shortened to stay away from the distal extension area.
alginate impression to pick up the prosthesis and record the remaining teeth.
air dry the RPD within the alginate pickup impression, apply clay/mud material with #7 wax spatula to
block out the following areas
: the retainers, proximal plate/and minor connector areas
low-fusing metal is melted in a ladle until it just reaches pouring viscosity
paper clips and create some retention loops.
Plaster base is added to complete the fabrication of RPD remount cast
Adjust for centric relation first and eccentric second.
The occlusal adjustment goal is to achieve solid centric contacts on both natural teeth and denture teeth.
•How to perform a clinical remount for RPD
•Why is clinical remount necessary for RPD
1.Accuracy The occlusal discrepancies are compensated due to the compressibility of oral mucosa and difficult to interpret intraorally
2. Versatile assessment We can access the occlusion from both buccal & lingual aspects
3. Patient management The equilibration can be completed in the lab, not in front of patient
•RPD maintenance and decision making of various options
: 1x/day all tooth contact surfaces with a cotton swab, or fluoride
stent is useful for all residual teeth.
: clean clasps and guide planes. Soaking alone does not remove plaque.
: to get used to
place w fingers, don't bite
cut food w/knife
denture cleaners AFTER scrubbing
: not real teeth
implants if existing is adequate support stability retention and pt still subjuctively not happy
RPD lab reline
identical to altered cast impression procedure
Remove about 1 mm of resin from the RPD base before the reline impression to allow for uniform thickness of impression material
Why use low fusing metal? Why not use stone?
Low fusing metal is liquefied over the heat and poured into only the occlusal surfaces of the teeth in the alginate impression
1. Superior wear resistance
2. fast setting quality