LARS (Ligament Augmentation and Reconstruction System) ligaments are artificial ligaments used for the intra or extra-articular reconstruction of ruptured ligaments. LARS ligaments are used to reconstruct a torn Medial Patellofemoral Ligament (MPFL) and are designed to mimic the normal anatomic ligament fibres in the knee. The intra-articular longitudinal fibres resist fatigue and allow fibroblastic growth. The extra-articular woven fibres provide strength and resistance to stretch.
LARS ligaments can be used in conjunction with suturing to the remaining section of the ruptured ligament, or as a stand-alone reconstruction.
For each patient the LARS ligaments are precisely selected according to the weight and activity level of each indivdual patient.
Using LARS ligaments can reduce surgery time considerably as no additional harvesting of grafts is needed. Thus the patient can expect a faster return to full function compared with MPFL reconstruction using hamstring tendon grafts. This is largely due to LARS ligaments allowing the original ligament tissues to heal in the absence of traction.
Advantages of LARS:
Using LARS ligaments MPFL surgery can be performed using minimally invasive surgery, which involves smaller incisions than the conventional MPFL surgery. There are no donor site complications since there is no need to harvest hamstring tendons.
For more information on the surgical procedure please see MPFL Reconstruction Surgical Procedure.