Ten-Year Results of the Triathlon Knee Replacement: A Cohort Study

Abstract

IntroductionStudies evaluating the outcomes of different brands of knee prostheses are important to monitor patient outcomes and generate evidence to aid decisions around the choice of implant. The Triathlon® prosthesis (Stryker, Limerick, Ireland), one of the most commonly used total condylar knee prosthesis, is designed to provide greater knee motion and the potential for longer implant survivorship. The aim of this cohort study was to evaluate outcomes and survivorship of the Triathlon total knee replacement (TKR) up to 10 years post-operative. MethodsTwo-hundred sixty-six ( 266) patients listed for a Triathlon TKR in one orthopaedic hospital were recruited. Assessments were conducted preoperatively and then at three months and one, two, three, five, seven, and 10 years after surgery. Outcomes assessed included pain, function, knee-related quality of life (QoL), satisfaction, kneeling ability, activity levels, American Knee Society Score, complications, and survivorship. ResultsLarge improvements in patient-reported outcomes were observed in the first three months after surgery, followed by small improvement up to one year post-operative, and then outcomes plateaued up to 10 years post-operative. Satisfaction with overall outcome ranged from 79%-94% over the duration of follow-up. Activity levels and kneeling ability were similar before and after surgery. There was a large improvement in the median American Knee Society score in the first three months post-operative, followed by a small but gradual improvement to 10 years post-operative. Survivorship was 95.4% (95% confidence interval 91.8-97.5%) at 10 years post-operative. ConclusionsThis study found that the Triathlon TKR results in excellent outcomes and survivorship to 10 years postoperative.

Decreased Implant Survival is Associated With Younger Patients Undergoing Total Knee Arthroplasty

“…Our study shows significantly lower rates of revision-free implant survival at 5 years in patients less than age 40 years (77.2%), 40 to 49 years (88.9%), and 50 to 59 years (91.7%) when compared with population aged 60 to 79 years (>95%). These implant-survival rates are markedly lower in the less than 40 years and 40 to 49 years groups compared to the general TKA population in the literature, which show 5-year implant survival greater than 96.5% [13,22,27,29,30]. Five-year implant-survival rates in patients above 60 years of age in our study are consistent with those previously reported.…”

Age wise comparative analysis of patients undergoing total knee arthroplasty: a multicenter indigenous experience

“…However, in most TKA cases, implant survival beyond 5 years seems to decrease and since the follow-up of these patients in ongoing, it would be interesting to observe the overall survivorship and rate of revision TKA in these cohorts. 21,22 In a retrospective analysis of patients grouped age-wise reported higher rates of revision and 23% revision rates at 5 years, significant higher readmission rates (within 90 days) in younger cohort (younger than 40, 40-49, 50-59). 19 However, in our prospective study, none of the patients younger than 55 or 55 to 65 were readmitted to hospital for post-TKA related issues.…”

Quantitative sensory testing as an assessment tool to predict the response to standard pain treatment in knee osteoarthritis: a systematic review and meta-analysis

“…A minimum of 6 months postoperative follow-up was chosen for surgical studies to assess chronic pain, as earlier research has reported the largest pain improvement 3 to 6 months after, eg, total knee arthroplasty surgery. 61 Pharmacological and exercise-based studies were included if they investigated long-term effects of therapy (weeks/months), whereas studies focused on the acute effects of pharmacological or exercise-based therapies were excluded. In addition, the exclusion criteria consisted of languages other than English, conference abstracts, and animal studies.…”