Phase I Periodontal Therapy Upon the recordings, all patients were given Phase 1 periodontal therapy and informed about hygiene control. Prior to surgical operation, professional supragingival and subgingival debridement was performed during 2 or 4 appointments. The patients with a good level of oral hygiene were included in the study. Oral hygiene controls were performed in the first, third and sixth months prior to and after operations. Occlusion controls of all implant supported dental prosthesis were performed, and if present, extreme contacts were removed.