Abstract
This is a study to see if improvised ‘articulating antibiotic cement spacers’ work in two-stage revisions for infected TKRs with bone defects in the condyles. The second objective is to see if adhesions can be prevented between intra-articular bone and soft tissue around it after the first stage to make exposure of the joint easy and quick in the second stage. Six cases were selected which had moderate defects of femoral or tibial condyles and a modified technique was used to prepare articulating cement spacers. Antibiotic cement moulded like pancakes was placed on the exposed raw areas of the femur and tibia. Patients were mobilised with protected weight-bearing after the surgery and active knee flexion was encouraged. Patients regained a mean of 80 degrees of knee flexion during the interval between the stages and a mean of 100 degrees of flexion following the second stage. There was no bone loss while removing the modified cement spacers. Patients had no significant intra-articular adhesions and hence the exposure of the knee joint during the second stage did not require further intra-articular dissection. Standard articulating spacers are not suitable in the cases with bone loss of the condyles. Our modified technique allowed us to use it in cases with moderate bone loss also where static spacers are used otherwise. This helped to mobilise these knees between the two stages of revision instead of keeping immobilised with static spacers. Antibiotic cement pancakes prevented intra-articular adhesions and carried an extra dose of antibiotic into the joint.
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The study material included in this article has gone through the institutional ethics committee and was approved. Six cases were included in this study. Appropriate pre-operative preparations were carried out. The joint fluid was aspirated for culture after stopping antibiotics for one week and a separate culture sample was taken from a discharging sinus in one patient. They were all counselled for two-stage revision surgery and informed consent was taken.
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Nallamilli, S.R., Reddy, R.N. & Althuri, M.K. First Stage Revision of Infected TKR: A Technique of Handcrafted Articulating Spacers and Cement Pancake Soft Tissue Spacers. JOIO 56, 2086–2092 (2022). https://doi.org/10.1007/s43465-022-00739-9
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DOI: https://doi.org/10.1007/s43465-022-00739-9