A 45-year-old male patient complains of bleeding gums, tooth mobility, hypersensitivity in the cervical zone. Objective examination revealed presence of all teeth, 1-2 class mobility, pathological gingival pockets with serous exudate. Radiograph shows widening of the periodontal ligament space, alveolar bone resorption by 1/3 - 1/2 of the root length. What kind of tooth stabilization is indicated?