COMPARATIVE EVALUATION OF PRF COMBINED WITH XENOGRAFT (STICKY BONE) vs CORONALLY ADVANCED FLAP SURGERY IN THE TREATMENT OF STAGE I / II WITH GRADE A/B PERIODONTITIS- A CLINICAL STUDY. EPH-International Journal of Applied Science, [S. l.], v. 9, n. 3, p. 1–9, 2023. DOI: 10.53555/2ccc3g08. Disponível em: http://eijas.com/index.php/as/article/view/204. Acesso em: 9 oct. 2025.