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Abstract
he OT CAP-retained removable partial denture and the cantilever
fixed partial denture are two unilateral prostheses that provide a solution to
the problems of unilateral distal extension base cases. This study was done to
compare between the stresses transmitted to the abutment teeth by these two
different treatment plans using electrical strain gauge technology.
An acrylic resin model was constructed with missing molars on one
side resembling a mandibular Kennedy class II partially edentulous case. The
premolars on the edentulous side were prepared and wax patterns for two fullcoverage
splinted crowns were fabricated. The male parts of the OT CAP
attachment system were attached to the distal surface of the wax pattern of the
crowns and the entire assembly was casted as one unit. The superstructure of
the OT CAP attachment system was then constructed. A metal loading beam
with anterior and posterior loading points was constructed and soldered to the
superstructure at the occlusal level for loading the OT CAP-retained
removable partial denture.
For standardization purposes, the splinted metal crowns with the OT
CAP bar carrying the male parts of the attachment system was considered as
the cantilever fixed partial denture in this study.
Electrical strain gauges were bonded to the buccal, mesial and distal
surfaces around the first and second premolars on the edentulous side.
Loading of the OT CAP-retained removable partial denture was done first.
Then, the superstructure was removed and the male parts of the attachment
system were loaded directly to resemble loading of the cantilever fixed partial
denture. Microstrain values were recorded and analyzed.