Functional vs Mechanical Alignment in Robotic Knee Replacement: Published in Gilmore Health
A new evidence-based article by Dr Mayur Rabhadiya has been published in Gilmore Health, examining a technical question that is becoming increasingly relevant as robotic total knee replacement allows surgeons to measure alignment and soft-tissue balance more precisely: should every knee be reconstructed to a traditional mechanical target, or can alignment be individualized within defined boundaries?
What the 2026 evidence adds
The article compares the 2026 SICOT-J meta-analysis of functional versus mechanical alignment in robotic primary total knee arthroplasty with the RASKAL randomized trial. A consistent technical signal is that functional alignment can reduce the need for ligament and soft-tissue releases in selected knees. Some studies also report early differences in pain, function or patient-reported measures. However, fewer releases are not the same as proven long-term clinical superiority.
Current evidence does not justify saying that functional alignment is universally better, that it produces a more natural-feeling knee for every patient, or that it improves implant survival. The available randomized evidence remains important precisely because it separates measurable technical effects from claims that have not yet been established over longer follow-up.
Why robotics changes the alignment discussion
Robotic assistance does not choose the alignment philosophy. The surgeon still decides what reconstruction strategy is appropriate. What robotics adds is the ability to quantify anatomy, component position, planned resections, joint gaps and the effect of small changes before committing to bone cuts. This can make a patient-specific plan more measurable and reproducible rather than relying only on visual estimation or fixed generic targets.
Patient selection and safe boundaries remain central. Severe fixed deformity, bone loss, ligament insufficiency, previous surgery, implant constraints and unusual anatomy may limit how far a reconstruction should move from conventional targets. Alignment is therefore a surgeon-led clinical decision rather than a marketing label attached to the robot.
Read the original Gilmore Health publication
Related evidence-based resources
The clinical message remains deliberately measured: precision is useful, personalization may be useful, and reducing unnecessary soft-tissue intervention may be desirable, but none of these should be converted into a guarantee. The quality of a knee replacement still depends on the indication, alignment strategy, implant selection, tissue management, perioperative care, rehabilitation and surgeon judgement as a complete system.
