Anatomical and minimally invasive ankle lateral ligament reconstruction (ALL) by gracilis tendon transplant was developed to address chronic ankle instability. It is based on various principles:

• Gracilis tendon transplant instead of autografting, which would weaken an already damaged ankle,
• Anatomical transplant trajectory that minimises medium and long-term laxity while preserving good mobility,
• Minimally invasive approach,
• Reproducible positioning with a patented aiming device