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Cervical spine immobilization devices are widely used to stabilize the cervical spine and prevent neurological deficits associated with unstable fracture. A large variety of cervical orthoses is available and may be divided into four basic groups. In this study, we used a low temperature thermoplastic material like Aquaplast to make a newly modified custom- molded cervical collar. The aim of this study is to quantify their efficiency, using a opto-electronic device. Eight healthful male volunteers were instructed to actively move their necks as much as possible in the directions of flexion, extension, lateral bending and axial rotation while upright sitting. We used a four-camera opto-electronic device (Selspot) to evaluaate the collar.The mean percentage of normal motion of head to thorax allowed are 12.5% flexion, 41.6% extension, 31.5% bending, and 7.5% rotation.
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