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Abstract
The repair and restoration of function of skeletal system affected by injury, disease or congenital defect can often be facilitated by the use of implants made of non- living materials. Corrosion of orthopedic biomaterials is a complex multifactorial phenomenon that depends on geometric, metallurgical mechanical, and solution-chemistry parameters and a firm understanding of these factors and their interactions is required in order to comprehend how and why implant materials corrode. The aim of the work was: to study the changes of metals used in common orthopedic practice after their removal and to study the surrounding tissues histopathologically.The material of this study included 32 patients with previous lower limb fractures treated with internal fixation. Different types of implants had been included in the present study after removal Dynamic Hip Screws (DHS), Athens’ screws, Moore’s pins; Intramedullary nails (IMN), Broad DCP, Narrow DCP, Semi tubular plates and interlocking tibia nail .