A 10-year-old boy applied to a dentist and complained about pain in his palate during eating. Objectively: the lower third of his face is shortened, mouth opening is not reduced. During joining of teeth the cutting edge of inferior incisors contacts with mucous membrane of palate. On the site of contact mucous membrane is hyperemic and slightly edematic. Lateral teeth have 1 class joining (according to Angle’s classification). Propose a rational plan of treatment of the patient’s lower jaw: