[Cylindrical osteotomy of the upper extremity of the tibia with advancement of the patellar ligament. Biomechanical treatment of gonarthrosis].

The authors recall briefly the applications of Pauwel's theories concerning surgery in cases of gonarthrosis, which must be surgery to relieve restrictions on movement and not surgery to restore shape. They describe briefly the main biomechanical principles which must guide the pre-operative investigations and report their experience with a technique proposed by Blaimont and perfected by Maquet, the advantage of which is the exactness of the surgical correction. The technique is also useful in cases of femoro-patellar arthrosis. Among 120 osteotomies carried out using this method, the authors obtained very good or good results in 85 per cent of cases, and fairly good or poor results in 15 per cent of the patients. This method makes it possible to avoid in the great majority of cases recourse to total prostheses of the knee.