Surgical navigation has been shown to improve alignment¹, reduce revisions², and improve functional outcomes³.
Today’s active patients demand a natural feeling knee, making precise alignment and individual soft tissue balancing essential in total knee arthroplasty. KNEE3 is a smart imageless navigation software from Brainlab that visualizes and summarizes the complex interaction between 3D-kinematics, joint stability and implant alignment. The KNEE3 is designed to seamlessly fit the surgeon’s technique, quickly assessing cutting block position and simplifying soft tissue management.
The Joint Stability Graph offers a new paradigm to assess joint stability and manage gap balancing in total knee arthroplasty. KNEE3 continuously calculates the resulting joint gaps based on the maximum knee joint mobility and 3D implant geometries. The Joint Stability Graph helps to identify malalignment, instabilities, contractures, and compartment tightness at one glance. While positioning cutting blocks for each respective cut, the surgeon can thereby safely preview the resection’s impact and control the resulting joint stability.
KNEE3 provides two options for pinless navigation of knee arthroplasty. The Adjustable Cutting Block from Brainlab allows for live navigation of the distal femoral cut without additional pin placement. The cutting block is placed on the bone with an easy-to-use template and contains adjustment dials to quickly set flexion/extension, varus/valgus, and distal resection while viewing live alignment on the navigation screen. The second option, KNEE3 Express, can be used with conventional instruments and allows for verification of the cutting block position and final cut results without pins. Quick three step registration adds virtually no time to the procedure.
ClearLens™*, the new passive optical tracking technology from Brainlab, streamlines navigation during software-guided surgery. ClearLens is an innovative solution that provides consistent marker visibility, faster setup, and simplified tray management. ClearLens tracking arrays are disposable and packed sterile for easy assembly and clean up.
Navigation systems collect detailed data on knee arthroplasty, including the disease state, cut positions, and final corrected outcome. Aggregating and presenting this data can improve communication with patients and enable advanced research. At the end of each procedure, KNEE3 automatically generates patient reports and case data that can be synchronized with Quentry, the secure cloud-based medical image sharing, analytics, and collaboration platform from Brainlab.
FDA clearance and commercial availability pending.
Mason JB, Fehring TK, Estok R, et al. Meta-Analysis of alignment Outcomes in Computer-Assisted Total Knee Arthroplasty Surgery. J Arthorplasty 2007; 22(8): 1097-1106.
De Steiger R, Liu Y-L, Grave SE. Computer navigation for total knee arthroplasty reduces revision rate for patients less than sixty-five years of age. J Bone Joint Surg Am 2015; 8: 635-642.
Lehnen K, Giesinger K, Warschkow R, et al. Clinical outcome using a ligament referencing technique in CAS versus conventional technique. Knee Surg Sports Traumatol Arthrosc 2011; 18(19): 887-892.