LARS Ligaments
JK Orthomedic LTD.
What is a Ligament?
About Knee Ligaments
About Shoulder Ligaments
About Ankle Ligaments
The LARS Ligaments
LARS Advantages
LARS Case Studies
LARS vs Other Surgeries
LARS Knee Joint
LARS Shoulder Joint
LARS Ankle Joint
Other LARS Applications


LARS in the Knee Joint Anterior and Posterior Cruciate Ligaments Operation

LARS Knee Ligament
LARS ligaments can be used to reconstruct both the anterior and posterior cruciate ligaments. LARS also has a special Y ligament to reconstruct the postero-lateral corner.

The ACL and PCL ligaments come in many different sizes so that selection according to weight and activity can be precise. The ACL and PCL synthetic ligaments have both been used extensively with very good results.

The ACL and PCL both have free fibres in the intra-articular part of the ligament, which allows for a smaller volume in the knee, fibroblastic ingrowth and a better resistance to fatigue in flexion and extension.

The ACL has the intra-articular bundles in clockwise or anti clockwise orientation; this is to mimic the natural ligaments in the right or left knee.

The LARS ACL is used in acute injuries or where there is a good ACL stump that is well vascularised. In chronic cases, if the rupture is on the femoral part and the ACL has attached to the PCL, this can be dissected off the PCL and can then be reconstructed like an acute case. In chronic cases where there are no usable ACL remnants, an autogenous reconstruction reinforced by a LARS Actor 8 or 10 is recommended.

With the PCL, reconstruction is ideal in the acute phase. In chronic cases, the Actor 8 or 10 ligaments can also be used with autogenous tissue if required.

Medial and Lateral Collateral Ligaments

Reinforcement of the medial collateral ligament is indicated in multiple injuries and after reconstruction of the cruciate ligaments. The synthetic ligament comprises three parts: the cylindrical and knitted part for the femoral tunnel; the medial portion with free fibres that correspond to the MCL itself (these allow fibroblastic ingrowth from the MCL into the LARS Ligament); and the flat distal part is for fixation to the tibia.

The lateral collateral ligament is normally reconstructed with a Y ligament. One arm acts as the LCL, wrapping around and then through the fibular head to prevent the fibular head articulating against the tibia, and then through a trans-femoral tunnel. The other arm follows the path of the popliteus tendon and completes the postero-lateral instability repair.

Patellar Tendon

Patellar tendon reconstruction is often a problem after trauma or in revisions (TKR or others). In case of total rupture, the ideal reconstruction involves using two LARS ligaments.

PTR30s are used, one medially and one laterally to balance the tension and patella tracking. The flat parts are sutured in front of the patella under the fibrous tissues, and the cylindrical parts are anchored with two screws into two tibial tunnels.

The PTR30 can also be used to derotate medially the patellar tendon in case of femoro-patellar pain syndrome due to hyper external tibial torsion, or to reinforce the medial patellar retinaculum in case of recurrent patellar instability.
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