The Journal of Bone and Joint Surgery, Vol 68, Issue 4 602-605, Copyright © 1986 by Journal of Bone and Joint Surgery, Inc
Treatment of idiopathic scoliosis with the Wilmington brace. Results in patients with a twenty to thirty-nine-degree curve
GS Bassett, WP Bunnell and GD MacEwen
The results in seventy-nine adolescent patients (ninety-five curves) who
had idiopathic scoliosis treated with the Wilmington brace are reported.
The average follow-up was two years and six months (range, one to nine
years). Before treatment, all of the patients had a curve that measured 20
to 39 degrees and a Risser sign of zero or 1. Although the magnitude of the
curve was generally reduced by about 50 per cent with the initial
application of the brace, a gradual loss of this initial improvement was
observed both during active treatment and after the patient was weaned from
the brace. Although twenty-seven (28 per cent) of the curves had progressed
more than 5 degrees at follow-up, Lonstein and Carlson reported that the
projected probability of progression of untreated 20 to 29-degree curves is
68 per cent. Thirty-six per cent of the thoracic curves, 16 per cent of the
thoracolumbar and lumbar curves, and 28 per cent of the double major curves
had progression of more than 5 degrees. However, only 11 per cent of the
patients had a curve that progressed sufficiently to warrant fusion. Our
findings indicate that the Wilmington brace favorably alters the natural
history of 20 to 39-degree idiopathic curves.