A 37-year-old man complains of an unpleasant sensation in his gums on the lower left jaw that developed after he underwent treatment for dental caries. several months ago. Examination reveals permanent fillings on the contact surfaces of teeth 36 and 37. The edges of the fillings are hanging over the interdental papilla. The gum in the area of teeth 36 and 37 is hyperemic and edematous. The periodontal pocket is up to 3 mm deep. What treatment will be etiological in this case?