FIELD: medicine.SUBSTANCE: group refers to the device used in the orthodontic correction of the position of the lower jaw arch relative to the upper jaw arch to correct class II and class III defects in children and adolescents and thus to improve the bite of the teeth. The device for correction of class II defects and activation of the lower jaw growth, upper jaw growth and lower jaw extension comprises the first shaft, the second shaft, the first articulation, the second articulation, the third articulation and resilient means. The first and second rods comprise a front end and a rear end. The first and second rods are rigid and have different lengths relative to each other, the length of the first rod exceeds the length of the second rod. The first articulation is designed to fix the front end of the first rod at the level of the upper jaw canine of the first human dental arch. The second articulation is designed to fix the front end of the second rod at the level of the first lower molar tooth of the second human dental arch. The third articulation joint connects the rear end of the first rod to the rear end of the second rod, provides the device with a transition from an open position to a closed position and thus traces the movements of jaws opening and closing. The resilient means are adapted to connect the third articulation joint to the second dental arch to return the device to the closing position, with a possibility of the first and second rods provision with a relative movement of the lower jaw arch relative to the upper jaw arch to the jaw closure position and bite direction to the forward position. The dentifrice comprises a top splint for attachment to the upper dental arch, a bottom splint for attachment to the lower arch, and the aforementioned device for correction of class II defects and lower jaw growth activation, connected by the first rod to the top splint and by the second rod to the bottom splint.EFFECT: use of inventions allows to ensure a
