On (b)(6) 2013, i had a failure of a total hip replacement.During the hip-revision operation it was found that the trunnion of the stem was whittled down to a sharp point.Rather than being a 10 - 12 summer stem, it had become approximately 4mm.It had eroded down the anterior corner of the acetabular component by the locking mechanism, and had removed the containment bar that holds the ring lock portion of the cup.As a consequence the liner was loose.The head was located in the ball and the trunnion up high.Failed parts: stem how/ost (b)(4) accolade tmzf plus hip stem#3 head.How/ost (b)(4) femoral head low friction ion treatment shell: zimmer (b)(4) trilogy acetabular shell with cluster holes porous 52mm od liner: zimmer (b)(4) trilogy acetabular system liner standard.On (b)(6) 2013 preoperative x-ray report "it appears that the femoral component of the left hip arthroplasty may be dislocated outside of the acetabular component.The prosthetic neck is also angulated.A lucent line is visible in the proximal femur on one view only.".
|