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FiguresPoster: 14Exchanging Polyethylene Liner With Cement Fixation in Well-FixedCementless Acetabular Cup*Yoon Je Cho - Kyung Hee University - Seoul, KoreaSang Joon Kwak - Kyung Hee University - Seoul, Republic of KoreaYoung Soo Chun - - ,Kee Hyung Rhyu - Center for Joint Disease, Kyung Hee University East-West Neo MedicalCenter - Seoul, KoreaChul Hee Park - Kyung Hee University - Seoul, KoreaMyung Chul Yoo - Kyung Hee University - Seoul, Korea*Email: yjcho@khmc.or.krPurpose: To analyze the short-term results of exchanging polyethylene(PE) liner with cementfixation in retained stable cementless acetabular cup.Materials and Methods: A consecutive series of 19 hips of 19 patients who underwent revisiontotal hip arthroplasty(THA) exchanging the liner with cement fixation in the retained stableacetabular cup were evaluated at an average follow-up of 38.9 months (24~75 months). Thecauses of revision surgery were liner wear and liner dislodging in all cases. There were 3 kindsof retained cementless cups, Harris-Galante(HG) II in 16hips, HG I in 2 hips and AML in 1 hip.There was a breakage of locking mechanism in 16 hips. There were 3 hips without breakage oflocking mechanism, and it was a case of metal cup malposition, metal shell damage, and cupdislodging without tyne damage. All of the PE liner was exchanged into the cross-linked PEliner except with a case with low profile cup. In all cases, bone graft as an additional procedurewas performed for the osteolysis around the acetabular components. Clinically, Harris hipscores, hip pain, limping and ROM were evaluated. Radiological changes, such as osteolysis,liner dissociation and wear, and bone graft incorporation were analyzed in consecutive series ofradiographs.Results: There was no case of re-revision surgery. There was a satisfactory improvement inHarris hip score from an average of 74.5 to 91.5. We could not find any cases with liner wearand liner dissociation from the cement fixation. There was no sign of alteration in the stabilityof polyethylene liner. The size of the osteolytic lesions significantly reduced postoperatively.Neither new osteolytic lesions nor a progression of Osteolysis were seen at the latest follow-upin bone graft area except a case with partial bone resorption. As a complications, there havebeen 4 cases of hip dislocation. None of these patients experienced recurrent dislocation afterprimary closed reduction.Conclusion: Exchanging a PE liner with cement fixation revealed satisfactory short-termresults. The result of the study demonstrates that the indication of this operation technique canfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]