Dual mobility prosthesis in Hip Arthroplasty

Abstract

Background: With the increase in the number of total hip arthroplasty performed in the next decades to reduce or prevent medical and mechanical complications such as post operative THA instability Dual mobility was introduced as an alternative to standard sockets to reduce the risk of THA dislocation post operatively.(1) Aim of the work: to evaluate the hip joint function and stability after dual mobility total hip replacement using standard evaluation methods in 20 cases of hip problems. Patients and Methods: This study included 20 patients; 9 males and 11 females with a mean age 55.1 ± 14.1. All cases were identified to have one or more risk factor for dislocation after hip arthroplasty, 8 cases had previous hip surgeries, (4 hemiaarthroplasties, 2 previous THR and 2 internal fixation surgeries) and 12 cases had no previous hip surgeries. From the 20 cases 1 case was operated through posterior approach and 19 through lateral approach. Results: There were 2 complications in 2 cases, limb length discrepancy (2 cm longer in the operated side) and superficial infection, all of which are attributed to technical and patient’s factors rather than implant factor.