الفهرس 
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Abstract
An ultimate goal during an implant over denture construction would be to optimize stress distribution and minimize both the forces transmitted to the implants as well as peri-implant bone loss. Stresses transmitted to the abutments is multi-factorial with numerous etiologies currently debated in the dental literature, among these factor is the denture base material.
This simulation study was conducted to determine and compare the effect of conventional heat cured acrylic resin denture base and fiber reinforced acrylic resin on stresses transmitted to the implant supported overdenture supporting structures using strain gauge technology.
An experimental acrylic cast representing the edentulous mandible with the bilateral implants in the canine region was constructed. Standard 3mm abutments were reduced to attain a dome-shaped configuration.
Two mandibular implant-supported overdentures were constructed. According to the denture base material, mandibular implant-supported overdentures were constructed using heat cured acrylic resin and fiber reinforced acrylic resin.
Four channel strain meter was used to asses and record the strains induced to the abutments and residual ridge. Two strain gauges were installed in the buccal wall of the implants. The other two gauges were installed on the buccal side of the residual ridge at the first molar area.
A loading device was used to produce a standardized static load within the physiologic limits of 60N on the second premolar and first molar area bilaterally and unilaterally.
Microstrains were recorded at each site of the strain gauge during bilateral and unilateral loading with enough time elapsed between each loading to allow complete rebound of the resilient structures.
The results of this study showed that
In all loading situations whether unilateral or bilateral, significantly greater amount of stresses are transmitted to the implant.
The use of heat cured acrylic resin denture base leads to better stress distribution to the implant and the residual ridge.
Insignificant difference between the micro stains recorded between the conventional heat cured and the fiber reinforced denture.