Use of Leucocyte- and Platelet-rich Fibrin Membranes in Single Implant

Inclusion Criteria: * Patients of at least 20 years of age, systemically healthy, with satisfactory oral hygiene assessed by plaque index and gingival index of less than 25% (O'Leay et al. 1972). * Patients requiring single implant placement in anterior maxilla (premolar to premolar) * Buccal soft tissue thickness of at least 2mm * Patients who agreed to participate in the study and signed a written consent (Resolution nº196 of October 1996 and the Code of Professional Ethics Dental - C.F.O. - 179/93) Exclusion Criteria: * Smokers * Patients with parafunctional habits, such as bruxism * Patients who need other types of rehabilitation, such as removable prostheses * Pregnant or lactating * Patients with uncontrolled systemic diseases (cardiovascular alterations, blood disorders, diseases that affect bone metabolism, immunodeficiencies, diabetes) * Patients who use drugs that interfere with wound healing or contraindicate the surgical procedure, such as gingival growth related drugs * Implants in adjacent regions * Sites requiring bone augmentation procedure * Patients in orthodontic treatment