The utilization of resorbable membranes in the guided tissue regeneration technique allows unquestionable advantages for both the dentist and patient. Collagen is an important constitutive element of the human body and therefore is biodegradable. This study deals with a new slow-resorbing collagen membrane that, when used in conjunction with hydroxyapatite, brings about very interesting results for the treatment of periodontal and peri-implant defects.