[Ambulatory management of idiopathic scoliosis using the Lyon orthopedic treatment. 70 cases reviewed].

This work tries to clarify the place which is due to the modified Lyons orthopaedic treatment of scolioses. Actually, nowadays, because of progress in surgery, some people abandon all orthopaedic treatment which caught severe progressive scolioses at the end of the growth period. The study covers 70 patients from a minimum distance of 3 years after the end of orthopaedic treatment. The treatment, in comparison with the classical Lyons treatment has two principle modifications: sequence protocol plaster then corset, purely external, not necessitizing hospitalisation or a stay in a specialised centre; and the use of resine which lightens the plaster. The results are given in angular loss as regards to the end of treatment, according to 3 factors; chronological form of the scoliosis, localization of the scoliosis, degree of the initial curvature. It emerges that in spite of the absence of hospitalisation at the beginning of the treatment, the results are comparable to those in literature (8, 19). We obtained 39 stabilizations of progression, 8 moderate aggravations without ulterior surgery, that is 67% good results. Our study confirms the high failure rate of orthopedic treatment of initial scolioses of 50 degrees and more (50%); compared to initial scolioses of 49 degrees to 20 degrees (29%); of dorsal scolioses (42%) compared to lumbar scolioses (18%); of child scolioses (40%) compared to adolescent scolioses (17%). It leads us to keep the Lyons treatment for progressive scolioses of 25 degrees to 40 degrees, from the start of puberty, or as preparation for surgical treatment.