الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Distal extension base removable partial dentures exhibit composite type of support which leads to movement of the denture base under loading. This movement leads to transmission of high amount of stresses to the abutment teeth. Many methods were proposed to control and distribute these stresses. Among the methods of stress control and distribution is the use of different clasp designs.
A maxillary model of Kennedy class II with a posterior modification space was constructed. This model replicated all the anatomic features of the teeth, their investing structures and the mucosa covering the residual ridges.
Three RPDs having the same design except for retainers placed on abutments anterior to the modification space were constructed. I bar clasp, Aker clasp and a distal rest were designed for the abutment anterior to the modification space of unilateral DEB.
In this study Strain gauge technology was used to assess microstrains induced to the abutment anterior to the modification space of Kennedy class II.
By analyzing the data Aker clasp design showed the highest stress concentration followed by I-bar and distal rest. On the other hand the I-bar induced higher stresses on the abutment on the free end saddle side in comparison to Aker clasp design.