A 14-year-old adolescent complains of bleeding and pain during eating occurring in the 36 tooth. Anamnesis states intense pain in the past. Objectively: the crown is severely damaged; carious cavity is large, penetrates into the tooth cavity, and is partially filled with overgrown pulp. The tissues demonstrate low sensitivity to touch, bleed upon touching. There are significant soft dental deposits on the 35 and 34 teeth.Make the diagnosis: