Article In Vivo Evaluation of Permeable and Impermeable Membranesfor Guided Bone Regeneration Estudio científico de Duosynt: Article In Vivo Evaluation of Permeable and Impermeable Membranes for Guided Bone Regeneration Autores:  Suelen Cristina Sartoretto, Natalia de Freitas Gens, Rodrigo Figueiredo de Brito Resende, Adriana Terezinha Neves Novellino Alves, Rafael Cury Cecato, Marcelo José Uzeda, Jose Mauro