A journal article was retrieved from the journal of bone and joint surgery (2022) that reported a retrospective study from the united states for surgeries performed by dr.Kevin p.Plancher between 2000-2015.The purpose of the study was to determine if pre-arthritic/kinematic alignment of knees would result in sustained long-term restoration of function, without conversion to total knee arthroplasty (tka), following non-robotically assisted, fixed bearing medial unicompartmental knee arthroplasty (uka).The study reviewed 150 medial ukas using the fixed-bearing uka (zimmer unicompartmental high flex knee system [zuk].A total of 127 knees (85%) were pre-arthritic/kinematically aligned, and 23 knees (15%) were to be non-pre-arthritic/kinematically aligned.The study population had a mean age of 65 +/- 10 years at time of surgery with 76 females and 74 males.Follow-up was conducted via retrospective radiograph review to obtain alignment measures and patient reported outcomes with a mean length of follow-up for 10 years (range, 4 to 20 years).The study reported one patient (patient 2, table 2) underwent conversion from an initial medial unicompartmental knee arthroplasty to a total knee 2.5 years postop due to technical errors.Attempts have been made and no further information has been provided.
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(b)(4).Report source: literature.Plancher, k.D., brite, j.E., briggs, k.K., & petterson, s.C.(2022).Pre-arthritic/kinematic alignment in fixed-bearing medial unicompartmental knee arthroplasty results in return to activity at mean 10-year follow-up.The journal of bone and joint surgery.American volume, 104(12), 1081¿1089.Https://doi.Org/10.2106/jbjs.21.00801.The device will not be returned for analysis; however, an investigation of the reported event is in progress.Once the investigation is completed, a supplemental medwatch will be submitted.Multiple mdr reports were filed for this event, please see associated reports: 0001822565-2022-03451, 0001822565-2022-03452.
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