Prediction of mechanical loosening in cemented acetabular cups by the immediate postoperative radiograph

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German Garabano
Fernando Lopreite
Harold Simesen de Bielke
Agustin Oviedo
Gabriel Nazur
gustavo Gomez Rodrigues
Hernan del Sel

Abstract

IntroductionThe durability of prosthetic components in total hip arthroplasty (THA) is one of the main topics of discussion. In the evaluation of the acetabular mechanical loosening (AML) come into play several aspects, including the hardened. A retrospective analysis was performed to predict the AML, analyzing the quality of the cemented in immediate radiography (Rx) postoperative (PO), comparing it to the radiographic findings in the medium and long term. Method180 cemented THA, with an average of 7.7 years follow-up and an average age of 66 years were analyzed. Interface bone-cement of each cup were analyzed, comparing the immediate PO Rx with the ultimate control, settling a score for boundaries observed in each area of Lee Charnley, capable of identifying and evaluating the AML.ResultsOf the 180 THA, 149 cups were considered well fixed (83%) and 31 badly fixed (17%). The radiographic AML averaged was 12.7% (23 of 180 hips). The median follow-up was 7.7 years. In the initially well set, there were 20 cases of radiographic AML (11.1%), without need for revision surgery. The wrong set cups had a percentage of AML clinical and radiographic 19,35% (6/31). ConclusionWe consider that a correct cemented technique decreases the likelihood of radiographic AML and improve long term clinical survival. While longer term follow-up and a greater number of patients are necessary, we believe that the quality of the cement interdigitation, in the immediate PO Rx is predictive of future AMA. 

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How to Cite
Garabano, G., Lopreite, F., Simesen de Bielke, H., Oviedo, A., Nazur, G., Gomez Rodrigues, gustavo, & del Sel, H. (2012). Prediction of mechanical loosening in cemented acetabular cups by the immediate postoperative radiograph. Revista De La Asociación Argentina De Ortopedia Y Traumatología, 77(2), 118-123. https://doi.org/10.15417/85
Section
Clinical Research

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