After surgical interventions on the knee ligaments, this orthosis stabilises the joint. The lightweight frame made of an aluminium alloy is modular and adapts to the anatomy of the body. The orthosis is put on and taken off from the front, rather than from behind as usual, so that the knee is bent as little as possible. In addition, the exchangeable limit blocks provide effective fixation. Thanks to magnetic fasteners, the straps do not have to be readjusted every time it is put on.