Purpose of the study: The cervical spine is the most mobile portion of the spinal column. Trauma raises a high risk of bone and ligament injury. Several cervical collars are used in adults with variable efficacy. For children the problem is the availability of adapted collars, although the issue has not been examined in the literature. The purpose of this work was to evaluate the efficacy of paediatric collars widely used for stabilising the cervical spine in children.

Material and method: Thirty asymptomatic patients aged 6 to 12 years participated in this study. Four types of paediatric cervical collars were used (Philadelphia, Miami Jr, Neloc, and the conventional stiff collar). The medium size, proposed for children aged 6 to 12 was used. A standard protocol was applied with the Vicon^® system to analyse movement. Mobility of the neck was recorded with and without collars: flexion, extension, lateral inclination and axial rotation. The mobilities recorded without a collar were compared with the values obtained when the children wore each collar. The degree of mobility reduction was calculated for each collar. Seventeen children participated in a reproducibility study. ANOVA and Student’s t test were used for the statistical analysis.

Results: There was no statistically significant difference between the collars for efficacy in the saggital plane, though apparent stability was better with the Neloc. The degree of reduction was smaller with the Philadelphia than with the other collars in the frontal plane. Miami Jr and Neloc were more effective than the Philadelphia and the conventional collar in the axial plane.

Discussion: This study provide an assessment of the efficacy of paediatric collars to limit mobility of the cervical spine. Although a limited number of collars are proposed, those available on the market appear to ensure optimal stability, particularly the Miami Jr and the Neloc. The stabilisation problem, could be resolved by adapting the collars, particularly the height.