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Researchers report cases of aseptic tibial debonding with cemented TKA
Researchers observed isolated tibial component cement debonding with a modern primary total knee arthroplasty (TKA) after standardized follow-up of 1,337 patients.
“Our standardized followup of patients undergoing TKA at routine intervals allowed us to discover a higher rate of revision resulting from tibial debonding,” Arlen D. Hanssen, MD, and colleagues stated in the study abstract. “We have discontinued the use of this particular tibial tray for primary TKA and surveillance for patients undergoing TKA continues to be warranted,” the investigators stated.
Hanssen and colleagues analyzed survivorship of patients who received the NexGen LPS 3° tibial tray (Zimmer; Warsaw, Ind.). They found 100% survivorship free of tibial debonding at the 1-year follow-up and 97.8% survivorship at 5-years follow-up, according to the abstract.
Regarding tibial debonding, radiographs showed a pattern of subsidence into varus and flexion, as well as debonding that occurred at the cement-implant interface.
Of the 25 TKAs that failed, 22 knees were well-aligned, which suggested the component debonding from the cement was not linked to either limb or component alignment, Hanssen and colleagues noted in the study.
Disclosures: Lewallen, Sierra, Pagnano and Hanssen’s institutions received funding from DePuy, Zimmer, Stryker and Biomet for work on this study. Lewallen received benefits from Zimmer greater than $100,000 related to this work.