Bioball universal modular neck adapter as a salvage for failed revision total hip arthroplasty
A 35 year old male (ankylosing spondylitis) with bilateral hip involvement was operated elsewhere and had bilateral total hip replacement, but both the hips got infected. The infected implants were removed and the patient was left with a bilateral excision arthroplasty (Girdlestone's procedure). After a period of 1 year, after the infection had subsided, he was operated for left hybrid THA. While waiting for the right revision hip arthroplasty, he fractured his right femur after a trivial fall. He was operated on the right side and a revision total hip replacement was performed using the fully porous coated stem (Solution Depuy). After 3 months, when the patient was made to bear weight, the stem subsided and the patient developed a painful right hip. The pain was due to subsidence and instability as the patient could not bear weight on the affected side. The version was found to be changed intraoperatively. We managed to restore the hip biomechanics and restore the version using the bioball neck adapter. The patient has been under followup for 3 years now without any further incidence of instability.