Johnson & Johnson Medical Devices Companies announced recently that DePuy Synthes is launching the ATTUNE Cementless Knee in a rotating platform option in select markets around the world. This launch combines the proprietary technologies of the ATTUNE Knee designed to provide stability while the knee is in motion with DePuy Synthes’ extensive heritage in rotating platform knees and cementless technology.
The demand for cementless knee replacement is increasing [1], specifically for younger, more active patients for whom biological fixation and in-growth of the implant to bone may help meet the demands of their active lifestyle today and into the future. In the US, cementless total knee replacement procedures increased more than 25 per cent from 2017 to 2018 [2].
“The ATTUNE Cementless Knee has the same kinematic features of the cemented ATTUNE Knee, but I feel the cementless technology is a better alternative for my younger and more active patients who have healthy, strong bone,” said Ryan Nunley, associate professor and fellowship director at Washington University Orthopaedics, Barnes Jewish Hospital. “These patients have the potential to remain active for many decades, and I think the evidence [3] is growing that cementless knees have good long-term durability. I’ve implanted more than 400 ATTUNE Cementless Knees in my practice with excellent early results.”
The ATTUNE Cementless Knee is the latest addition to the comprehensive ATTUNE Knee platform, which also includes a cemented primary knee system, a revision knee system and a tibial base with ATTUNE S+ Technology designed to enhance intraoperative tibial fixation.
As with the cemented primary and revision systems, the ATTUNE Cementless Knee features several patented technologies designed to improve knee function. These include the ATTUNE GRADIUS Curve to provide stability through the range of motion and GLIDERIGHT Articulation to more accurately replicate the normal relationship between the patella and femur.
In developing the ATTUNE Cementless Knee, DePuy Synthes drew on the successful clinical history and legacy of its cementless and rotating platform technologies, including the LCS Cementless Knee which features POROCOAT Porous Coating which allows for biologic fixation. The LCS Cementless Knee with POROCOAT Porous Coating has demonstrated an implant survivorship of 97.4 per cent at a minimum 17-year follow-up [4]. In addition, all of the bone interfacing surfaces of the ATTUNE Cementless Femoral Component are coated with POROCOAT Porous Coating and the ATTUNE Cementless Rotating Platform Tibial Base features four porous-coated pegs and central cone designed to enhance fixation of the implant to the bone.
The ATTUNE Cementless Knee is initially being launched in the United States, select countries in Europe, Japan, Australia and New Zealand, with additional launches to follow. It is available in a cruciate retaining and posterior stabilised rotating platform construct as well as a hybrid construct (cementless femoral component with a cemented fixed bearing or rotating platform tibial base).
References:
1 and 2. DRG Q3 2018 Construct Report .
3. National Joint Registry for England, Wales, Northern Ireland and the Isle of Man, 15th Annual Report. (2018). Table 3.25. Available from: njrreports.org.uk
4. McMahon SE, Doran E, O’Brien S, Cassidy RS, Boldt JG, Beverland DE. Seventeen to Twenty Years of Follow-Up of the Low Contact Stress Rotating-Platform Total Knee Arthroplasty With a Cementless Tibia in All Cases. J Arthroplasty 34(3): 508, 2019. 10.10.1016/j.arth.2018.11.024.
