Total knee arthroplasty (TKA) continues to advance as innovative devices become available. #2 PDO Quill SRS (Angiotech, Reading, Pa) bidirectional barbed suture was used for 161 primary TKAs at our facility. We report on 3 separate cases of extensor mechanism repair failure after primary TKA in which a barbed suture was used for extensor mechanism closure. Before the implementation of this device, there were no reported failures in 385 primary TKAs. We recommend that surgeons who use this device for extensor mechanism repair of a medial parapatellar arthrotomy in TKA exercise caution when operating on patients with morbid obesity, diabetes, and rheumatoid arthritis. We have discontinued use of the bidirectional barbed suture until more definitive large orthopedic studies establish its efficacy and safety.
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