INDIRECT RETAINER Flashcards
When the distal extension denture base is dislodged from its basal seat, It tends to rotate around the ___ lines.
fulcrum
T/ F
Indirect retainer components should be placed as far as possible from the distal extension base, which provides the best leverage advantage against dislodgement
T
T/ F
the nearest canine tooth or the mesioocclusal surface of the first premolar may be the best location for the indirect retention.
T
CLASS 1
passes through most posterior abutments
CLASS 2
passes diagonally through most posterior teeth on one side and abutment on distal extension side
CLASS 3
passes through two principal abutments
CLASS 4
passes through two abutments adjacent to the single edentulous space
The most commonly used indirect retainer
AUXILIARY OCCLUSAL REST
located on an occlusal surface and as far away from
the distal extension base as possible
AUXILIARY OCCLUSAL REST
in a Class I arch, this location is usually on the
mesial marginal ridge of the first premolar on each side of the arch
AUXILIARY OCCLUSAL REST
in a Class II arch, these are usually placed on the marginal ridge of the first premolar tooth on the opposite side of the arch from the distal extension base
AUXILIARY OCCLUSAL REST
used when mesial marginal ridge of the 1st premolar is too close to the fulcrum line or when the teeth are overlapped so that the fulcrum line is not accessible
CANINE REST
such a rest may be made more effective by placing the minor connector in the embrasure anterior to the canine
CANINE REST
consists of a finger extension from premolar rest to the lingual slope of adjacent canine
CANINE EXTENSION FROM OCCLUSAL REST
applied when first premolar is the primary abutment
CANINE EXTENSION FROM OCCLUSAL REST
used to effect indirect retention by increasing the
distance of a resisting element from the fulcrum line
CANINE EXTENSION FROM OCCLUSAL REST
it is used in conjunction with a terminal rest on the
mesial marginal ridge of the premolar tooth
CANINE EXTENSION FROM OCCLUSAL REST
they rest on unprepared lingual surface
CINGULUM BARS (continuous bars) AND LINGUOPLATES
the indirected retainers are actually in the form of
auxiliary occlusal rests or canine rests
CINGULUM BARS (continuous bars) AND LINGUOPLATES
they indirectly provide indirect retention
CINGULUM BARS (continuous bars) AND LINGUOPLATES
T/ F
the occlusal rest on secondary abutment in class II modification 1 serve as an indirect retainer
T
T/ F
The primary abutments in a Class II, modification 1 partial denture are the abutment adjacent to the distal extension base and the most distal abutment on the tooth-supported side
T
T/ F
If only one tooth is missing in the modification areas, occlusal rest on this side should provide support for the unsupported major connector along with indirect retention
T
Rugae area is ____ hence used for indirect retention especially for class I situations
firm
it can be used in case of āuā shaped designs
RUGAE SUPPORT
less effective than a tooth supported indirect
retainer
RUGAE SUPPORT
T/ F
rugae coverage is undesirable if it can be avoided
although palatal coverage may be used to
advantage
T
AUXILIARY FUNCTIONS OF INDIRECT RETAINERS
It tends to reduce _____-tilting leverages on the principal abutments.
anteroposterior
