The Duration of the correction loss after removing cheneau brace in patients with adolescent idiopathic scoliosis

Özet

Objective: The aim of the study was to evaluate the loss of truncal rotation over 54 hours after removing Ch^eneau brace. Methods: The studied groups consisted of 39 girls aged 10e18 years old, diagnosed with adolescent idiopathic scoliosis (AIS) and treated with Ch^eneau brace (CAST) and 20 AIS girls aged 10e18 years old, nottreated with bracing. Posterior-anterior radiographs were obtained from the clinical assessmentof all subjects and were subsequently used to determine Cobb angles. The measurements of the angle of trunk rotation (ATR) were taken with the Scoliometer® and back-contour device during Adams forward bending test by the two evaluators. The changes in ATRs during 54 hours of observationwere performed afterthe brace had been taken off (0, 2, 24,30, 48 and 54 hours afterdebracing). This was described using VATR variable, defined as the change in the absolute Scoliometer® readings in the time intervals against the time interval Dt between the measurements. During back-contour assessment the differential factor (kra) has been used for the digital analysis. The changes in kra over 54 hours of observation were expressed as Vkra factor, defined as the difference in the absolute value of the amplitude differential factor (kra) in the time intervals against the time interval Dt between the measurements. Results: The highest changes were observed in the thoracic as well as in lumbar spine in patients with Cobb angle30, axial rotation of the apical vertebrae within 5e15, Risser sign 0e2. The biggest change in the trunk rotation after Ch^eneau brace had been taken off was noted within the first two hours of observation. Conclusion: The patients should be advised to take the brace off for a minimum of two hours before the scheduled x-ray, to allow full relaxation of the trunk in order to obtain reliable radiological images of the deformation.