Özet:

Introduction: In normal day-to-day life, the hip joint is the type of joint that undergoes a lot of stress during a persons normal daily activities. Since the hip joint is a vital joint that supports all joints in the body, normal and proper functioning of this joint is essential for maintaining a pain-free daily life.The overall success rate of total hip arthroplasty is largely determined by its ability to maintain hip stability and mobility while reducing pain in associated hip pathologies. The total joint replacement situation is in a state of constant development. Phillip Wiles was the first total hip replacement surgeon in London in 19381. Accurate positioning of the femoral and acetabular components is considered a prerequisite for successful total hip arthroplasty4-8. The optimal position of the stem and cup is an average anteversion angle of approximately 37 degrees (range: 25 to 50 ◦) 9-11 to avoid impingement and/or dislocation. Cup-to-stem or bone-to-bone impingement causes dislocation, accelerated wear, and pain in patients undergoing total hip replacement 12. McKibbin 13 first introduced the term in a study of infant cadavers and defined a total anteversion of 30 to 40 with his 15 anteversion of the femur as normal. Lewinnek8 defined his zone of safe cup alignment as his tilt of 40° ± 10° and his anteversion (AV) of 15° ± 10°.The Ranawat test is a visual assessment of compound anteversion when the femoral neck and head are flush with the acetabular opening. The angle of internal rotation to make the head and socket coplanar is combined anteversion.14 Therefore, dislocation is an important and critical complication which has to be avoided. In our study we are calculating combined version in total hip arthroplasty which will helpful in assessing the cup position post operatively with this we can assess the relation of stability of hip and functional outcome. Getting combined anteversion in safe zone of    40◦ ± 10◦ is important for surgeon to give patients a comfortable daily activities of living.

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