intro Flashcards
what kind of acrylic is used in dentistry?
thermoplastic acrylic resin
polymethylmethacrylate
what is the function of acrylic?
denture base that hold replacement teeth
what is the function of cobalt chrome?
cast framework that hold replacement teeth
describe tooth borne support
everything rests on teeth
saddle supported in both sides by substantial abutment teeth
describe mucosa borne support
everything rests on the mucosa
biting forces resisted entirely by soft tissue
describe tooth and mucosa borne support
mixture some of the denture rests on the teeth, some rests on the mucosa
describe Kennedy class 1
missing posteriors
describe Kennedy class 2
missing posteriors on one side
describe Kennedy class 3
banded saddle posterior
describe Kennedy class 4
banded saddle
what is a shortened dental arch?
in the right circumstances, non-replacement of posterior missing teeth can provide a stable and acceptable dentition
eg. upper & lower 5-5
what is a clasp?
engages a tooth and enters an undercut for retention
where would a clasp be on molars?
occlusally approaching
where would a clasp be on anterior teeth and premolars?
gingivally approaching
what is a rest?
described by their position
occlusal
cingulum
incisal
what is a major connector?
the portion of an RPD that connects its components
what is a minor connector?
components that serve as the connecting link between major connector and other components eg clasp and occlusal rests
what is a saddle?
the part of the denture which carries the artificial teeth
free-end or bounded
what is an abutment?
a tooth that serves to support a prosthesis
what is a pontic?
an artificial tooth that replaces a missing natural tooth
when is a pontic normally used?
fixed partial dentures-bridgework
what is the function of a pontic?
restores its function and usually restores the space previously occupied by a crown
