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As a result, more weight tends to pass through the medial compartment of the knee than the lateral part. This can damage the medial compartment and lead to premature wear of the cartilage and the meniscus.
In some cases, and when medical treatment is insufficient, realignment of the mechanical axis of the lower extremity may be indicated to straighten the knee.
This is a tibial valgus osteotomy.
A minimally invasive medial approach is used.
The osteotomy, which consists in cutting the top of the tibia, is performed under x-ray control. A lateral bone hinge is preserved intact so the cut can be opened up and the deformity corrected according to its magnitude.
Synthetic bone is inserted to promote consolidation.
A plate is fixed to hold the correction in place while it heals and to rapidly enable weight bearing.
The aim of the operation is to relieve the pain caused by the damage to the medial compartment of the knee and to slow down the onset of osteoarthritis.
The mechanical axis is restored and the forces redistributed.
Following the operation, crutches are used for 3 to 6 weeks to relieve the joint.

Part 1
Osteoarthritis is the wear and tear of the cartilage on the humeral head and the glenoid cavity of the scapula.
A shoulder replacement is indicated in the case of osteoarthritis for which medical treatment is ineffective.
When the rotator cuff tendons in the shoulder are preserved, a so-called “anatomical” total shoulder replacement can be proposed.
An anterior incision is made in the shoulder.
The muscles are moved aside to expose the anterior shoulder tendon. Humeral head can then be exposed and cut.
Different rasps are used to prepare the surface for the insertion of the humeral implant.
The glenoid cavity is then exposed. The bone is specifically prepared using different cutters. The implant is second to place.
The implant is then reduced. Immobilization of the shoulder for 3 weeks followed by prompt rehabilitation will help ensure recovery of a painless, normal range of motion.

Part 2
With osteoarthritis and a pre-existing tear of the shoulder tendons, the humeral head tends to migrate upwards.
A standard anatomical replacement is not possible.
A reverse replacement is necessary that can offset the lack of tendons.
The same approach is used.
The humeral head is cut. Then, the bone is prepared with rasps to allow the placement of the socket-shaped humeral component.
The humeral glenoid is then exposed. The bone is prepared using different cutters. This preparation enable placement of a cementless component fixed with 4 screws in which the glenoid hemisphere can be inserted.
The 2 implants are put back into place. The deltoid muscle in the shoulder can once again assume its lifting role thanks to the shape of the implant.
The shoulder is no longer painful and full range of motion is generally restored.
Post-operative recovery is the same, with immobilization in a vest for 3 weeks.

The anterior cruciate ligament is a major ligament located in the middle of the knee which connects the femur to the tibia. It prevents forward translation and stabilises the knee during rotation. Its rupture results in instability and abnormal function during flexion and extension of the knee. In this case, it must be repaired. Anterior cruciate ligament reconstruction is performed arthroscopically. The old ligament is prepared and partially cleaned. Using a drill guide, a pin is accurately positioned where the anterior cruciate ligament inserts in the femur. This pin guides the drill bit to create the femoral tunnel. The same procedure is carried out on the tibia. A tunnel is created and ends at the natural tibial insertion of the anterior cruciate ligament.
The tendons harvested beforehand are passed through these tunnels, thus recreating the anterior cruciate ligament from where it is attached to the tibia to where it is attached to the femur. The tendons are attached using interference screws, which trap the tendons in the tibia and the femur. These screws will break down over time. As much of the old anterior cruciate ligament is retained as possible to help promote cell colonization on the new ligament. The stability of the knee is thus restored.
This operation is performed arthroscopically through small incisions using a camera to visualize the joint, thus minimising scarring and enabling faster recovery.

The shoulder tendons, which compose the rotator cuffs, are inserted in the upper extremity of the humerus. The acromion is part of the scapula and forms the top of the shoulder. The tendons rub against the acromion if it is too curved, resulting in irritation and rupture. The acromion is firstly trimmed in order to remove the impingement or excessive contact with the tendons. The bone of the humeral head is prepared to receive the anchors, which will enable the repair. The threads attached to these anchors are passed through the tendon and are tied together to reattach the tendon to the bone. The tendon is thus repaired and there is no longer any excess contact between the tendon and the acromion. As a result, the tendon can heal by averting repeated rupture. The shoulder thus recovers mobility and strength, and is no longer painful.
This operation is performed arthroscopically, without opening the shoulder, through small incisions using a camera to visualize the joint. The operation preserves the other shoulder muscles and enables rapid recovery.

The first is a flap with a mobile fragment in the joint between the femur and the tibia, causing pain, discomfort and cartilage damage due to rubbing of the cartilage. The meniscal bell clapper must therefore be resected using small pliers and finely rectified using a small surgical knife with a vacuum system.
The second type of lesion is peripheral, that is to say, located around the edge of a well-vascularised area where the meniscus can heal. Miniature suturing instruments are used to repair the lesion. Several stitches help the lesion to heal rapidly, thus preserving the entire meniscus.
This surgery is performed arthroscopically through small incisions using a camera to visualize the joint, thus minimising scarring and enabling faster recovery.

The shoulder tendons are covered by what is called the acromion, which is part of the scapula. This acromion can be too curved or hooked causing premature contact with the tendons and thus rubbing during repeated movement of the shoulder. This irritates the tendons, which become inflamed and can rupture. The operation consists in resecting the inferior side of the acromion to flatten it and thus prevent the tendons from rubbing during movement. This is done using a small, motorised cutter, thus relieving the pain and preventing the premature wear of the tendons.
This operation is performed arthroscopically, without opening the shoulder, through small incisions using a camera to visualize the joint. The operation preserves the other shoulder muscles and enables rapid recovery.