Chronic periodontitis predictable responds to mechanical cleaning and cause related periodontal surgery. Nowadays the therapeutic protocol of the chronic periodontitis is widely known and scientifically proven. The therapy can be split into two major phases, the inicial or cause related therapy and the surgical therapy, however in the most of the cases the patients need complex periodontal, restorative and prosthodontic therapy. The presented case demonstrates the process and results of the complex treatment of a 55 years old patient suffering from chronic periodontitis. The patient didn't have hopeless teeth. In the first phase of the cause related periodontal therapy professional oral hygiene treatment, scaling rootplaning and subgingival curettage were performed by quadrants. At the re-evaluation after the conservative periodontal therapy there was a significant pocket reduction in the mandibular quadrants, however there was a need for surgical pocket therapy in the molar regions of the maxillary quadrants. Modified Widman-flap surgery and osteoplasty were performed in both of the maxillary quadrants. After the surgical periodontal therapy the revision of the old root canal fillings was accomplished in the teeth 24, 36 and 47. Due to an inflammatory root resorption, root resection was performed following the root canal filling on the tooth 24. Three months after the root resection surgery, the tooth was reinforced by a glass fiber post. Nine months postoperatively the periapical area of the tooth 24 showed growing radioopacity After the second reevaluation of patient's compliance and the healing tendencies full mouth prosthodontic reheabilitation was provided. Metalloceramic crowns with a supragingival margin were made on the teeth 12, 24 and 36, metalloceramic bridge was made on the teeth 44 and 47. After the periodontal, restorative and prosthodontic therapy were finished the patient was remanded every 3 months for periodontal supportive therapy and could maintain excellent oral hygiene with a plaque score under 20% and a bleeding score of 6%.