The Lyon Brace or adjustable multi-shells brace has been used for more than 60 years. Three types of braces have been developed: Lyon thoracic brace, Lyon thoraco lumbar brace and Lyon lumbar brace. Considering the conservative orthopaedic treatment of scoliosis we outline the results of this orthosis. The management of the Lyon Brace includes: (i) The use of one or two reductive plastered brace which enable a flow of the concavity ligaments; (ii) a moulding either hand-oriented or electronic after the resection of the plastered brace; (iii) a blueprint adapted to Lenke's classification; and (iv) a specific physiotherapy. The protocol of the wearing of the orthosis depends on the initial angulation of the scoliosis. The effectivity index of 1338 scoliosis checked at least two years after the weaning of the brace, is 0.95. The effectivity index is 0.80 when the Lyon brace is put in place at Risser 0. If the angulation is globally stabilized, the rib hump is, on average, half reduced. We get the best results for lumbar scoliosis and double major. The technological progresses allow a precise use. The adjustment becomes easy during puberty growth.

Unlike adolescent idiopathic scoliosis, bracing was used in adults less and was used more as a way of reducing pain. There is little publication of adult scoliosis series in the literature. The use of very high-rigidity and high-precision CAD/ CAM technologies currently makes it possible to create corrective braces for the adult. The digital CAD/CAM cast in three blocks allows for precise correction at the pelvic, lumbar, and thoracic levels. This chapter presents the results of a series of 62 consecutive adult scoliotic patients treated with a corrective asymmetric detorsion brace of very high rigidity made in 2014-2016. Tolerance and angular correction results will be compared to those of 158 patients treated with the former bivalve polyethylene overlapping immobilization brace mainly used for lumbar scoliosis. The new Lyon adult ARTbrace is a detorsion brace adapted to all the curvatures which controls the sagittal plane. Despite a resistance four times greater than that of polyethylene of the same thickness, the tolerance of the Europlex'O is excellent as it is a "shock absorber," and the anterior opening facilitates the use for very old people. Consequently, the aim of this chapter is to consider if it is possible to envisage for some patients an alternative to surgery, thanks to the new technologies of bracing.