Orthosis comprising of front and back pieces, made from plastazote with rigid thermoplastic supports and Velcro strap closures on the sides. Its upper part is designed to make full contact with the lower part of the head by means of an occipitalchin support. Its lower part rests laterally on the shoulders with the front portion situated over the sternum and the rear over the D5 vertebra. The front part of the collar features a tracheal opening. It is possible to perform X-rays while the patient is wearing the device, as it contains plastic rivets that do not distort.