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Robotic TKR System Optimizes Implant Fit and Alignment

By HospiMedica International staff writers
Posted on 21 Aug 2018
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Image: A novel robotic–guided TKR system uses guides to precisely direct bone resection (Photo courtesy of OMNI).
Image: A novel robotic–guided TKR system uses guides to precisely direct bone resection (Photo courtesy of OMNI).
Advanced software and robotic-assisted instrumentation tailor total knee replacement (TKR) procedures to the patient's unique anatomy.

The OMNI life science (OMNI; Raynham, MA, USA) OMNIBotics System is a computer controlled, robotic-assisted TKR technology designed to relieve the pain caused by joint degeneration due to osteoarthritis. OMNIBotics Bone Morphing technology is used to quickly build and display a three-dimensional (3D) model of patient anatomy in real-time. Using the 3D imaging model, the surgeon can then accurately plan implant fit and alignment before bone resections are initiated. The surgeon is not dependent on making a pre-operative plan based on computerized tomography (CT) scans or X-rays.

Well-defined algorithms and adjustable resection guides enable the surgeon to accurately reconstruct the mechanical axis of the patient’s leg with the aid of APEX software, which alongside a proprietary robotic cutting guide directs the surgeons where to execute femoral resections. During surgery, a real time assessment of limb alignment and soft tissue tension is made that verifies the pre-determined surgical plan is being followed. In addition, an Active Spacer system enables the surgeon to predictively balance the ligaments through dynamic real-time feedback across the entire range of motion to maximize patient outcomes.

“With many studies indicating that a significant percentage of knee replacement patients are not fully satisfied with the results, OMNIBotics Active Spacer technology provides the surgeon with a quantitative tool to plan bone cuts to address the resulting ligament balance,” said Christian Joly, vice president of Robotics at OMNI. “We believe that this advanced robotic device is helping increase surgeon confidence, improve consistency, and reduce the number of soft tissue releases by creating a customized patient-specific procedure.”

“It's been great to be able to check the accuracy of the surgery and make adjustments to perfect the angles and alignment of each step of surgery. This is so much more personalized and accurate than the traditional knee replacements done elsewhere,” said Brigham Redd, MD, of Liljenquist & Redd Orthopedic Surgery (Idaho Falls, ID, USA). “It's exciting to offer the most advanced technology to my patients and see them come back feeling even better than they do after a traditional knee replacement, and to be confident that their knee replacement will last even longer because of the precise and individualized alignment.”

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