International Journal of Advanced Biotechnology and Research (IJBR) ISSN 0976-2612, Online ISSN 2278–599X, Vol-7, Issue-4, 2016, pp2058-2066 http://www.bipublication.com Research Article Short-term results of total hip arthroplasty for post traumatic arthritis in acetabular fracture internal fixation Afshin Taheriazam 1 and Amin Saeidinia 2,3 1. Department of Orthopedics Surgery, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran. 2. General Practitioner, AssistantResearcher,Mashhad University of Medical Sciences, Mashhad, Iran 3 Member of Young Researchers Club, Rasht Branch, Islamic Azad University, Rasht, Iran. Corresponding author:Afshin Taheriazam, Address: Tehran Medical Branch, Islamic Azad University, Khaghani St, Shariati Ave, Tehran, Iran; Email: afshintaheriazam@yahoo.com, Telephone number: +989121113486 ABSTRACT Background:Post traumatic arthritis is common in young patients. It should be treated by normal joint biomechanics to not developing. Total hip arthroplasty (THA) after this disorder is a challenge for orthopedics. Objectives:The aim of this study was to assess the short term outcomes of THA following acetabular fracture. Patients and Methods:85 patients with post-traumatic arthritis after acetabular fractures were treated by THA in Milad and Erfan hospitals, Tehran, Iran during 5-year. Short-term outcomes of subjects were evaluated. 73/85 were male and the mean age of participants was 49 years (18-69 years). Prospective functional outcome and complications of THA was recorded in follow up of patients for a period of 5.21 ± 0.38 years. Results:There was no dislocation, DVT or PTE and only 4 cases with preoperative sciatic nerve injury detected. Two cases (2.35%) underwent re-operation. Our analysis of results showed that Modified Hip Harris Score (MHHS) improved from 43.64±4.42 preoperatively to 93.26±3.28 postoperatively (P<0.0001). Five-years survival was 95% with all variables considered. Conclusion:THA makes good pain relief and functional outcome with few complications and cementless acetabular reconstruction for posttraumatic arthritis after acetabular fracture is suggested. Keywords: Total hip arthroplasty, internal fixation, acetabular fracture, post traumatic arthritis BACKGROUND Acetabular fractures constitute approximately 10% of all pelvic fractures and majority of them caused by high energy trauma i.e. traffic accidents and falls from heights (1). Most of cases are related to multiple traumas, but are increasingly caused by minor trauma also. They are also frequently associated with traumatic hip joint dislocations (2, 3).In order to acetabular fractures management, threepossible late post- traumatic complications potentiallyrequire reconstructive surgery: post- traumaticosteoarthritis (OA), avascular femoral head necrosis(AVN) and heterotopic ossification (HO). OA occurrence is varied in the range of 5- 56% based on fracture pattern,grade of displacement and successfulness of the primary osteosynthesis; AVN frequency is determined at a range of 4-29% (4-6). The goal of treatment for post traumatic arthritis is anatomic correction of the articular surfaces to prevent the development of posttraumatic arthritis. Hip degeneration can result from articular incongruity, cartilage damage at the time of injury, subtle joint instability, avascular necrosis of the femoral head, or inadvertent intra-articular fixation implant placement. The incidence of posttraumatic arthritis and the potential need for delayed arthroplasty is highly variable and is reportedly between 24% and 57% (7, 8). Most of post-traumatic deformities