Acetabular Revision Arthroplasty Using Jumbo Cementless Components

Objective To explore the clinical outcomes using so-called jumbo cups in acetabularrevision arthroplasty.Methods35patients(35hips) were included in this study, which had an acetabularreplacement with so-called jumbo cups from May1996to May2011. There were12malesand23females, with the mean age of64.8years(range from47to79years). The causes forrevision were aseptic acetabular loosening in thirty-two patients, femoral periprostheticfracture with aseptic acetabular loosening in2, low toxicity infection in one.6cases wereclassified as Type Ⅰ,9cases as Type Ⅱ,20cases as Type Ⅲ according to theclassification of acetabular bony deficiencies of the American Academy of OrthopaedicSurgeons (AAOS). According to the classification proposed by Paprosky,5cases wereType ⅡA,9cases were ⅡB,13cases were ⅡC, and8cases were Type ⅢA. Theprimary total hip arthroplasty cups with an outside diameter of46-52mm, and the revisioncups were56-68mm.Results The mean follow-up time was8.4years (range from2to14years). Only1acetabular component was revised again for aseptic loosening after10years. Theremaining34cases were well fixed by the radiograph imaging. Bone ingrowths wasobviously performed in the remaining34hips. There was1case dislocation after20daysof the surgery, which was treated without reoperation. No one has continuous radiolucentlines. No infections or periprostheticosteolysis. In the hips that were not revised again, themean Harris hip score increased from (46.4±13.4) points preoperatively to (90.4±3.6)points at the time of the last follow-up.Conclusions This study suggests that jumbo cups used for acetabular revision in thepresence of bone loss perform very well.