Excellent 10-year patient-reported outcomes and survival in a single-radius, cruciate-retaining total knee arthroplasty

Abstract

PurposeOver 2 million Triathlon single-radius total knee arthroplasties (TKAs) have been implanted worldwide. This study reports the 10-year survival and patient-reported outcome of the Triathlon TKA in a single independent centre.MethodsFrom 2006 to 2007, 462 consecutive cruciate-retaining Triathlon TKAs were implanted in 426 patients (median age 69 (21–89), 289 (62.5%) female). Patellae were not routinely resurfaced. Patient-reported outcome measures (SF-12, Oxford Knee Scores (OKS), satisfaction) were assessed preoperatively and at 1, 5 and 10 years when radiographs were reviewed. Forgotten Joint Scores (FJS) were collected at 10 years. Kaplan–Meier survival analysis was performed.ResultsAt 10–11.6 years, 123 patients (128 TKAs) had died and 8 TKAs were lost to follow-up. There were four aseptic failures (two cases of tibial loosening, two cases of instability) and four septic failures requiring revision. Symptomatic aseptic radiographic loosening was present in three further cases at 11 years. Four (1%) patellae were secondarily resurfaced. OKS score improved by 17.7 ± 9.7 points at 1 year (p < 0.001), and was maintained at 34.7 ± 9.6 at 10 years with FJS 48.5 ± 31.4. Patient satisfaction was 88% at each timepoint. Ten-year survival was 97.9% (95% confidence interval 96.5–99.3) for revision for any reason, 98.9% (97.7–100) for mechanical failure, and 98.6% (97.4–99.8) for aseptic loosening (symptomatic radiographic or revised).ConclusionThe Triathlon TKA continues to show excellent longer-term results with high implant survivorship, low rates of aseptic failure, consistently maintained PROMs and excellent patient satisfaction rates of 88% at 10 years.Level of evidenceII, Prospective cohort study.

Changes in Expectation Fulfillment Following Total Knee Arthroplasty: A 10-Year Follow-Up Study

“…Those who became less fulfilled (58%) experienced a decline in OKS over this time period. Previous 10-year follow-up studies of TKA have shown a mean decline in both knee-specific function scores and the physical component element of generic health scores from 5 to 10 years [25]. This is consistent with patient aging and is not a surprising trend.…”

Association Between Femoral Component Sagittal Positioning and Anterior Knee Pain in Total Knee Arthroplasty

“…1 ). The TKAs were performed by 7 surgeons at a large orthopaedic teaching hospital 9 . At 10 years, 326 patients were alive with an intact TKA.…”

“…Patients who did not respond by mail were telephoned. Full details and analysis of the entire cohort (n = 462) have been published previously 9 .…”

“…Radiographic analysis was performed on short-leg weight-bearing radiographs using a picture archiving and communication system (PACS) measurement tool (Kodak Carestream) on the earliest acceptable postoperative lateral image. All follow-up radiographs were examined to assess loosening or other causes of pain, details of which have been published previously 9 . Those with radiographic evidence of loosening as a potential source of pain were excluded.…”

Mid-term Patient Reported Outcomes and Survivorship Following Robotic Assisted Total Knee Replacement: A Cohort Study

“…This study is limited in that 33% of patients were lost to follow up. This was significantly higher than studies of similar length follow up [7] likely due to the high propensity of retirees in the area to relocate secondary to the cost of living in this particular geographic region. Recent studies show that from 2010-2017, New York State experienced negative net domestic migration of over 1 million persons.…”