الفهرس 
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Abstract
Statement of problem: Studies analyzing the stress distribution on splinted abutments by single-bar versus cantilevered-bar are lacking. Aim of the work: Was to study the stress distribution around splinted abutments of mandibular single-bar versus cantilevered-bar overdenture using two types of connections between the bar and the overdenture. Materials and Methods: Acrylic resin model of human edentulous mandible was fabricated with two detachable standard sized canines embedded in canine area. Single-bar and cantilevered-bar (with 7mm distal extension) were fabricated. A clips retained and soft liner retained overdenture were fabricated for each bar design. Vertical axial load was applied unilateral and central to the central fossa of first molar area on each of the four standardized overdenture prosthesis. Stresses that developed around the abutments will be monitored using strain gauges. Conclusions: Within the results of this study, it could be concluded that: 1- The non rigid connection in bar overdenture supported by two canine abutments is highly recommended for adequate load distribution especially in cantilevered bar cases. 2- Soft-liner material is highly recommended to be used as a bar overdenture female housing. Recommendations: 1- When using the v-shaped single bar attachment that may act as an anterior cantilever, we should use a posterior cantilever extension for equalization of forces and decreasing the stresses transmitted to the abutments. 2- It also advisable that; periodic monitoring of the distal supporting structures of the cantilevered overdenture abutments is strongly recommended.