الفهرس 
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Abstract
Purpose: the aim of this study was to compare the stress distribution pattern of two different attachment mechanisms used to retain mandibular overdenture assisted by two inclined implants. Materials and methods: Four identical acrylic resin mandibular edentulous models covered with 2mm silicone simulated mucosa were used for this study. Two implant analogues of 3.3mm diameter and 11mm length were installed in each model. According to the implant inclinations; the four models were classified into four groups as follows: group I, two 200 buccally inclined analogues were installed in the canine areas; group II , the two analogues were installed 200 inclined lingually, group III, the two analogues were installed 200 mesially and group IV, the two analogues were installed 200 inclined distally. Eight duplicate mandibular denture were constructed and connected to the analogues using Locator attachments and Stern snap angle attachments respectively. Four linear strain gauges were bonded to the acrylic resin around each analogue at mesial, distal, buccal and lingual sides to measure the strain around the implant analogues during unilateral and bilateral load application. Results: 1-distally and lingually inclination recorded the highest strain values, while mesially and buccally inclination recorded the lowest values. 2- the locator attachment recorded the highest strain values, and stern snap angle attachment recorded the lowest values regardless the implant inclination. Conclusion: the stern snap angle attachment seems to be more favorable in the stress distribution around the implant than a Locator attachment.