A 37-year-old patient complains of gingival hemorrhage, offensive breath, tooth mobility, difficult mastication. Objectively: the gums are of cyanotic-red colour, periodontal pockets are 6 mm deep and contain serous exudate, there is II class tooth mobility, moderate amount of subgingival and supragingival tartar; hygiene index is 3 points, there is traumatic occlusion along the entire length of the dental arches. What is your provisional diagnosis?