When the pressure is applied to the left and right edges of the face by the HEADrang P-plate, the central part of the jaw will be extended in the form of V line (the phenomenon of bone elongation).

The bone is a living organism repeating destruction and regeneration periodically.

 Therefore, in the process of bone elongation, the number and activity of osteoblast (cells responsible for the generation of bone) and osteoclasts (cells responsible for the destruction of bone) increase. Therefore, the process of bone destruction and regeneration occur naturally in the process of jaw deformation.

This process is a phenomenon occurring to compensate for the elongation of the jaw, so the thickness will neither grow nor the jaw protrudes forward.