Overview

Computer-assisted total knee replacement (CA-TKR) is a surgical technique that uses advanced technology to assist in the precise alignment and positioning of the knee implant during the procedure. This method is particularly beneficial for patients with complex deformities, such as varus or valgus malalignment, significant deformities due to previous trauma, or conditions like rheumatoid arthritis or osteoarthritis that lead to severe joint deformities.

Preoperative Planning and Imaging

CT Scans or MRIs

Prior to surgery, detailed imaging like CT scans or MRIs are used to assess the degree of deformity in the patient's knee. These scans provide a 3D view of the knee joint, helping the surgeon understand the structural anomalies and plan the surgery more accurately.

Computer Software

Advanced software programs are used to analyze the imaging data, allowing the surgeon to plan the surgery in a highly detailed manner, including the exact positioning of the knee implant.

Surgical Navigation

Real-time Feedback

During the surgery, computer-assisted navigation systems use infrared tracking to guide the surgeon in real-time. Sensors placed on the femur, tibia, and knee components help track the position and alignment of the bones and the prosthetic components.

Precision

This allows for precise alignment, even in complex deformities, reducing the chances of malalignment that could lead to complications or poor outcomes.

Adjustment for Deformities

Correcting Alignment

In cases of varus (inward) or valgus (outward) deformities, the computer system can help the surgeon make more accurate adjustments to the tibial and femoral components to restore proper knee alignment. This is crucial to avoid excessive wear, instability, and pain after the procedure.

Bone Reshaping

CA-TKR allows for more precise bone resections and reorientations, making it possible to correct significant deformities in a way that wouldn’t be possible with traditional techniques.

Benefits in Complex Cases

Improved Accuracy

For patients with severe deformities, traditional methods might struggle to achieve optimal alignment. Computer-assisted techniques improve the accuracy of component positioning and alignment.

Reduced Risk of Complications

Proper alignment can minimize risks such as loosening of the implant, instability, wear, or incorrect load distribution, which are particularly concerning in patients with complex deformities.

Faster Recovery

With better alignment and positioning, patients often experience better function and less pain post-surgery, leading to a faster recovery.