الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 121 |  |  |
| | | from | 121 | | |
Abstract
SUMMARY
This simulation study was conducted to determine and compare the effect of equator and locator attachments on stresses transmitted to the overdenture supporting structures using strain gauge technology.
Two mandibular overdenture retained by equator and locator attachments were constructed on two acrylic experimental mandibular models, the first model was retained by equator attachment, while the second model was retained by locator attachment.
Two strain gauges were installed, on the residual ridge at site of first molar and distal aspect of the abutments.
A loading device was used to produce a standardized load within the physiologic limits (100 N) at distal side of the second premolar and mesial side of the first molar, unilaterally and bilaterally.
Microstrains were recorded at each side of the strain gauges during unilateral and bilateral loading with enough time elapsed between each two successive loading to allow complete rebound of the resilient structures of the model.
The results of this study revealed that, statistically significant higher stresses transmitted to the residual ridge with groupII (using locator attachment) than stresses transmitted by groupI (using equator attachment), while higher stresses transmitted to the abutment with groupI (using equator attachment) than with groupII (using locator attachment).
The results of this study revealed also increase in the stresses transmitted to the overdentures supporting structures (residual ridge and the abutment) under unilateral loading than under bilateral loading.