Skip to main content

Prospective study of 136 adolescent scoliosis of more than 40° treated with the Lyon brace


Due to a lack of prospective studies, which are difficult to perform, bracing adolescent scoliosis is discussed from 30°, and sometimes surgery is proposed at this angulation. It seems interesting to study the results of scoliosis over 40° with the Lyon brace, and to present the criteria for successful treatment.


To prove the effectiveness of the Lyon conservative treatment in the most difficult conditions. If treatment is effective for scoliosis over 40°, it is even more so for lower angulations.


We selected in our prospective database a cohort of 176 adolescent scoliosis patients with curves over 40° seen between 1998 and 2007. At this angulation, the Lyon management involves 2 plaster casts, each worn for two months, and a full time Lyon brace up to 18 months after the end of the growth, and a specific program of physiotherapy (Lyon method).


24 patients (13.6%) did not accept the protocol and chose surgery. 11 patients (6.25%) discontinued during the treatment. 136 patients (136 females and 18 males) can be studied statistically. Mean initial angulation is 45.4° (+-6.33); reducibility in plaster cast and brace is 50%. At follow up 2 years after weaning, angulation is 40.5° (+-13.1). 61 patients (45%) improved by more than 5°, 27 patients (20%) are stable, 48 (35%) are worsening by more than 5°. The results are worse in boys (57% failure). 21 patients were evaluated 10 years after weaning of the brace. Mean progression during this period is 5° (0.5°/year) identical to that of the general adult scoliotic population. The best results are obtained when the lower vertebra is L3 (89%); the worst when the lower vertebra is T12 (53%). The two significant predictors of failure of conservative treatment are:

  • A prior treatment (p>0,05).

  • Early onset scoliosis (EOS) and non-idiopathic scoliosis (p>0,01).


Conservative treatment with Lyon brace and physiotherapy was effective in halting scoliosis progression in 65% of patients including prior treatments. The results of this study confirm that bracing is effective even after 40°. For EOS and non idiopathic, it allows waiting until end of growth for surgery.


  1. Zaborowska-Sapeta K, Kowalski IM, Kotwicki T, Protasiewicz-Faldowska H, Kiebzak W: Effectiveness of Cheneau brace treatment for idiopathic scoliosis: prospective study in 79 patients followed to skeletal maturity. Scoliosis. 2011, 6 (1): 2-10.1186/1748-7161-6-2.

    Article  PubMed Central  PubMed  Google Scholar 

  2. Danielsson AJ, Hasserius R, Ohlin A, Nachemson AL: A prospective study of brace treatment versus observation alone in adolescent idiopathic scoliosis: a follow-up mean of 16 years after maturity. Spine (Phila Pa 1976). 2007, 32 (20): 2198-2207. 10.1097/BRS.0b013e31814b851f.

    Article  Google Scholar 

  3. Coillard C, Vachon V, Circo AB, Beausejour M, Rivard CH: Effectiveness of the SpineCor brace based on the new standardized criteria proposed by the scoliosis research society for adolescent idiopathic scoliosis. J Pediatr Orthop. 2007, 27 (4): 375-379. 10.1097/01.bpb.0000271330.64234.db.

    Article  PubMed  Google Scholar 

Download references

Author information

Authors and Affiliations


Rights and permissions

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and permissions

About this article

Cite this article

De Mauroy, J. Prospective study of 136 adolescent scoliosis of more than 40° treated with the Lyon brace. Scoliosis 8 (Suppl 1), O34 (2013).

Download citation

  • Published:

  • DOI: