الفهرس 
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Abstract
The effect of telescopic crowns and anterior splint bar with an anterior clip on the stresses iduced around the abutments and implants in an implant supported partial overdenture restoring kennedy class I with an anterior modification was evaluated using strain gauge analaysis.
Two identical acrylic mandibular models with the canines, first and second premolars bilaterally as abutment teeth were used for this study .These models replicate the anatomic features of the teeth and their investing structures .
The abutments were reduced to 5-6mm in height to provide sufficient tooth reduction with 6 degree taper. Two implants four mm in diameter and ten mm in length were placed in the second molar area in the two models then two standard abutments were screwed to their corresponding implants and prepared to attain a dome shaped abutment of 3-4 mm approximately in height.
Two mandibular overdentures were constructed were the first one were retained by telescopic retainers and supported posteriorly by two implants and the second one were retained anteriorly by splint bar and supported posteriorly by two implants.
Four channel strain meter was used to asses and record the strains induced mesial to the canine, distal to the second premolar, mesial and distal to the implant.
A loading device was used to produce a standardized static load within the physiologic limits of 80 N on the first molar area unilaterally and bilaterally.
Microstrains were recorded at each site of the strain gauge during unilateral and bilateral loading with enough time between each load to permit complete rebound of the resilient structures.
Based on the data obtained from this experimental in vitro study, it can be concluded that:
• The use telescopic crowns increases the stresses induced around the abutment teeth.
• The use of anterior splint bar leads to a favorable stress distribution around the abutment teeth.
• Stresses induced around the implants are not affected by either the use of the anterior splint bar or the telescopic crowns.
• Unilateral loading was more traumatic to the abutments compared to bilateral loading as bilateral loading provides wide distribution of stresses.