With over 10 years and over 2 million implantations worldwide, Triathlon has a long clinical history.1-3 In a recent 10 year follow up study Triathlon showed 99% survivorship.3 Triathlon was designed to incorporate some of the most studied features of Stryker’s prior designs that have been shown to address many of the main reasons for revision TKA such as instability, patellofemoral tracking complications and loosening/osteolysis.3
The Triathlon knee system offers surgeons a variety of options depending on disease, deformity and patient demand including cruciate-retaining, condylar-stabilizing, posterior-stabilizing and difficulty primary options. Studies have consistently shown that Triathlon and the single radius provide:
Stability: Triathlon’s single radius design allows for mid-flexion stability.4-6 A single vs. multi radius functional outcome study concluded that Triathlon’s advantages in stability, walking, stair climbing and knee straightening stem from the single radius design, particularly its longer moment arm and enhanced ligament stability based on maintained isometry throughout knee range of motion. 4 Another fluoroscopic study on Triathlon patients showed the femoral component was kinematically stabilized in mid-flexion ranges5. Additionally, gait reviews comparing patients with a single or multi radius knee implant showed that patients with a single radius knee implant experienced gait patterns that more closely mimicked that of the non-diseased control group. 6
Satisfaction: A review of Triathlon patients showed a high level of satisfaction at seven year follow up.7
Survivorship: Multiple studies and joint registries8-10 from around the world consistently show a high rate of survivorship with Triathlon with more than 10 years of follow up.