The Lequesne Algofunctional index is a questionnaire aimed at evaluating, by a health professional, the functional abilities and the discomfort felt by patients suffering from gonarthrosis or osteoarthritis of the knee.
- 0-4: Moderate handicap or no handicap.
- 5-7: Average handicap.
- 8-10: Significant handicap.
- 11-13: Very significant handicap.
- ≥ 14: Extreme, unbearable disability.
An index greater than or equal to 10 may be an indication for a prosthesis.
Osteoarthritis of the knee, also called gonarthrosis, is manifested by wear and progressive deformation of the knee joint with damage to the menisci. The cartilage, which serves to absorb shocks, gradually disappears. The bony ends of the femur and tibia, initially covered with cartilage, end up bone to bone.
The pain can be of mechanical origin, caused by the friction of the articular surfaces, or of inflammatory origin (arthritis).
There are two origins of osteoarthritis:
Primary or idiopathic: without obvious cause other than the degeneration of the cartilage of the knee linked to the modification of the chemical composition of the joint.
Secondary or mechanical: having as main causes excess weight, sedentary lifestyle, joint stress (work and sport), a fracture or contusion affecting the articular cartilage, a tear or removal of a meniscus (meniscectomy), dysplasia (a morphological abnormality of the bony extremities) or chronic instability of the knee due to ligament rupture as well as poor alignment of the lower limb.