Postoperative Care All subjects were instructed to rinse twice daily for 2 weeks with 0,12% clorhexidine gluconate. Tooth brushing and interproximal toothbrush on the regenerated area were initiated at the 15th day after surgical treatment. An analgesic and anti-inflammatory medication were provided for postoperative pain control for 3 days. Antibiotic was provided as well during 7 days. The sutures were removed after 2 weeks, and the surgical sites were gently cleansed with sterile saline using a cotton swab. The patients were scheduled for recall visits on the 1st and 2nd week after surgical treatment and then at 1, 3, 6, and 12 months postoperatively. Oral hygiene was evaluated and supragingival prophylaxis was carried out at each recall visit. Neither probing nor subgingival instrumentation were performed during the first 6 months after surgery.