METHOD AND SYSTEM FOR GUIDING AN OSTEOTOMY PROCEDURE

• Main Authors: CHANRION, Marie-Anne, FONTAINE, Sylvain, LONJARET, Thomas
• Format: Patent
• Language: English
• Published: 23.02.2023
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

The present disclosure relates to a method for guiding an osteotomy procedure on at least one bone selected from a tibia and a femur pertaining to a patient's lower limb to correct a misalignment of said lower limb, wherein a tibial tracker is fixed to the tibia and a femoral tracker is fixed to the femur, comprising:receiving at least one target alignment parameter of the lower limb;determining a position of a set of characteristic points on at least one of the tibia and the femur relative to at least one of the tibial tracker and the femoral tracker;applying mechanical constraints to the lower limb to bring the lower limb in a constrained position simulating laxities and/or soft tissues influencetracking positions of said characteristic points relative to at least one of the tibial tracker and the femoral tracker based on localization data of the set of characteristic points during application of said mechanical constraints,determining at least one alignment parameter of the lower limb in said constrained position, based on the positions of the characteristic points;based on the at least one target alignment parameter and on the at least one alignment parameter of the lower limb in the constrained position, determining at least one correction parameter of the osteotomy procedure to be applied to the lower limb to achieve the target alignment parameter.