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KMID : 0359620090210030150
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Journal of Korean Knee Society
2009 Volume.21 No. 3 p.150 ~ p.157
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An Articulating Versus Non-articulating Spacer for 2-Stage Reimplantation Patients Who Undergo in Infected Total Knee Arthroplasty
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Hwang Jun-Kyung
Oh Chang-Wug
Lee Hyun-Joo
Kyung Hee-Soo
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Abstract
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Purpose: We compared the results between an articulating spacer and a non-articulating spacer for 2-stage reimplantation when performing infected total knee arthroplasty (TKA).
Materials and Methods: From 1998 to 2007, for 22 patients with infected TKA, we retrospectively evaluated 23 knees that were treated with debridement, component removal and insertion of a non-articulating or articulating spacer, followed by second-stage TKA revision. Non-articulating spacers were used in 13 knees and articulating spacers were used in 10 knees. The most common infecting organism was Staphylococcus aureus in 9 cases, but the infecting organism could not be found in 10 cases. The average length of follow-up was 24 months.
Results: The eradication rate was 100% (0 infections in 10 knee) in the articulating group compared with 92.3% (1 infection in 13 knee) in the non-articulating group. The average range of motion before removal of the implant was 60.3˚ for the articulating group and 61˚ for the non-articulating group. After revision arthroplasty, the average range of motion was 104.3˚ for the articulating group and 92.3˚ for the non-articulating group. The rectus snip was done for 3 cases in the articulating group and in 13 cases for the non-articulating group. Yet there were no functional differences between the two groups during the final follow-up period.
Conclusion: We conclude that the articulating spacer can maintain knee mobility during between the interval stages and improve knee flexion without an increased risk of infection at the final follow-up period.
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KEYWORD
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Infection, Total knee arthroplasty, 2-stage reimplantation, Articulating spacer
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