Prepared by Dr. Kayahan KARAYTUG
Robotic-assisted total knee arthroplasty (R-TKA) has gained widespread adoption in recent years, offering enhanced precision in implant positioning, alignment, and soft tissue management. By integrating advanced imaging, real-time intraoperative feedback, and data-driven planning, robotic systems aim to reproduce patient-specific knee anatomy while minimizing surgical variability and intraoperative trauma.
Preoperative planning is a key determinant of successful outcomes in total knee arthroplasty. Robotic technology enhances this phase by enabling accurate digital planning of implant size, position, and alignment prior to bone resection.
Robotic systems provide:
Depending on the platform, surgical planning may be based on:
These technologies improve planning accuracy and reproducibility compared with conventional manual techniques.
Accurate anatomical mapping is a critical step in robotic-assisted TKA. Using tracking probes, key anatomical landmarks of the femur and tibia are registered to create a patient-specific 3D model of the knee.
Important considerations include:
Modern robotic platforms also allow real-time assessment of patellofemoral alignment, contributing to improved component positioning and individualized surgical planning.
Once the virtual knee model is established, the robotic interface displays implant positioning in the:
This enables detailed evaluation of:
Robotic software alerts the surgeon to potential planning conflicts and allows immediate plan modification. Various alignment philosophies—mechanical, kinematic, or restricted kinematic—can be simulated and adjusted intraoperatively.
Robotic systems provide real-time visualization of:
Varus and valgus stress testing allows quantitative assessment of collateral ligament balance. Implant position, resection depth, or polyethylene insert thickness can be adjusted to achieve balanced gaps, typically within 0–2 mm symmetry across the range of motion.
Bone preparation in R-TKA is performed with high precision using robotic-guided cutting instruments. A key safety feature is the haptic boundary, which provides tactile resistance if the cutting tool deviates beyond the predefined resection limits.
Advantages include:
Some systems combine robotic guidance with conventional cutting blocks, integrating precision with surgical familiarity.
After bone resections, trial components are inserted to verify:
The robotic system provides both visual and quantitative feedback. If imbalance or malalignment is detected, adjustments to bone cuts, implant sizing, or insert thickness can be made before final implantation.
Current evidence indicates that robotic-assisted TKA offers:
Although long-term functional superiority over conventional TKA remains under investigation, improved alignment precision has been associated with:
Early clinical data suggest high patient satisfaction, reduced intraoperative variability, and promising short- to mid-term outcomes.
Robotic-assisted total knee arthroplasty represents a significant technological advancement in knee arthroplasty, offering enhanced precision in alignment, implant positioning, and soft tissue balancing. While definitive long-term clinical superiority over conventional techniques has yet to be established, robotic systems provide consistent, reproducible, and patient-specific surgical execution that may translate into improved outcomes over time.
