Resorbable vs Non-resorbable Bone Substitute at Immediate Post-extractive Single Implants

Inclusion Criteria: * Any patient requiring at least one single immediate post-extractive implant. * At least 18 year old, able to understand and to sign an informed consent * There must be sufficient bone to allow the placement of at least a 3.5 mm diameter and 8.5 mm long implant. * After tooth extraction there must be a potential gap of at least 2 mm from the buccal inner bone plate and the implant surface. Exclusion Criteria: * General contraindications to implant surgery. * Immunosuppressed or immunocompromised patients. * Patients irradiated in the head and/or neck. * Uncontrolled diabetes. * Pregnancy or lactation. * Active periodontal disease * Poor oral hygiene and motivation. * Addiction to alcohol or drugs. * Psychiatric problems and/or unrealistic expectations * Patients with an acute infection (abscess) in the site intended for implant placement. * Patients unable to commit to a 5-year follow-up. * Patients treated or under treatment with intravenous amino-bisphosphonates. * patients referred only for implant placement if follow-ups cannot be done at treatment centre. * Patients participating in other studies, if the present protocol could not be fully adhered to. In case of doubts please contact the study coordinator.