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e extended to the cup with malposition, damaged shell, or the cup which has a high risk ofliner dissociation because of weak original locking mechanism such as HG I and II cup. Eventhough our short-term follow-up study revealed excellent results, more long-term follow-upstudies are mandatory to determine the long-term stability at the metal cup-cement-linerinterfaces.Key words: Osteolysis, cementless acetabular cup, polyethylene liner, cross-linkedpolyethylene, revision total hip arthroplastyPoster: 15Dilute Betadine Lavage Prior to Closure for the Prevention of AcutePostoperative Deep Periprosthetic Joint Infection*Cara Cipriano - . - ., .Mario Moric - Rush University - Chicago, USACraig Della Valle - Rush University - Chicago, USA*Email: caracipriano@gmail.comIntroduction: Infection is a devastating complication following total joint arthroplasty. Priorwork has shown that a dilute betadine lavage prior to wound closure decreases the rate ofinfection following orthopaedic spine procedures. The purpose of this study was to evaluate theefficacy of a dilute betadine lavage in preventing early deep post-operative infection followingtotal hip (THA) and knee (TKA) arthroplasty.Methods: Dilute betadine lavage (0.35%) for 3 minutes prior to wound closure was introducedinto the practice of the senior author in June 2008. 1,862 Consecutive cases (630 THA and1,232 TKA) performed prior to initiation of this protocol were compared to 688 consecutivecases (274 THA and 414 TKA) after initiation of the dilute betadine lavage, for the occurrenceof acute postoperative infections (within the first 90 days post-operatively). Infections weredefined as gross purulence encountered within the joint at the time of surgical exploration or adeep culture positive for bacterial growth. A chi-squared analysis was performed to comparethe rates of infection with and without the use of betadine lavage.Results: Eighteen acute post-operative infections (0.97%) were identified prior to the use ofdilute betadine lavage and one (0.15%) since its introduction (p = 0.04). There were nosignificant differences in the age (63.7 vs. 63.4; p = 0.59), percentage of female patients (66.2%vs. 66.9%; p = 0.74), or primary diagnosis of osteoarthritis (89.4% vs. 90.6%; p = 0.38)between the two groups.Conclusion: These results suggest that dilute betadine lavage prior to surgical closure may bean inexpensive, effective means of reducing acute post operative infection following total jointarthroplasty.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]