Introduction: Excessive implant angulation, leads to increased maintenance of the prosthesis .This research aimed to evaluate the retentive power and wear of the equator with smart box attachment use with 10 degree tilted two implant assisted mandibular overdenture .Material and methods:: this in-vitro was carried on six mandibular completely edentulous casts which received two mandibular implant in the cuspid region bilaterally .the cast divided into 2 equal group. (Groups I) OT equator with smartbox attachment and (Groups II) ball attachment .The overdenture were subjected to 1440 cyclic loads. The retention values and wear of the attachments were recorded baseline and after 0, 720, and 1440 cycles .Result: Comparison between both groups was performed using Independent t-test which revealed significant difference after 1400 cycle P