الفهرس 
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Abstract
Fifteen completely edentulous male patients were selected for this study. These patients were categorized according to the pattern of their treatment modalities into three equal groups:
group I: Patients of this group were rehabilitated with mandibular implant-supported overdentures with 33o anatomical teeth arranged following the bilateral balanced concept of occlusion.
group II: Patients of this group were rehabilitated with mandibular implant-supported overdentures with modified anatomical teeth arranged following the lingualized concept of occlusion.
group III: Patients of this group were rehabilitated with mandibular implant-supported overdentures with modified anatomical teeth arranged following the canine protected concept of occlusion.
The pocket depth, the amount of collected crevicular fluid, crestal bone height and density surrounding the implants were evaluated at denture insertion, three months, six months, nine months and twelve months following denture insertion to compare the effect of the three occlusal schemes on the supporting structures of implant-supported overdentures.