Randomized Clinical Trial, Conventional Treatment-controlled, Studying the Efficacy of Plasma Rich in Growth Factor (PRGF®) in Alveolar Ridge Preservation After Simple Exodontia in the Anterior Region of Maxilla.

Inclusion Criteria: * \- Subjects of both sexes with an age greater than or equal to 18 years. * Clinical indication for a simple exodontia in the aesthetic zone (from left 2nd premolar to the right 2nd premolar in the maxilla). * Need of a dental implant placement in the extraction site. * Availability to follow-up during the treatment period * Subjects with non-active periodontal disease. * Buccal dehiscence \< than 25% in the vestibular table Exclusion Criteria: * \- Presence of an active infection * Loss of any plate of the socket * Severe inflammation in the area of the exodontia previous to the intervention * Have previous diagnosis of a coagulopathy. * Have previous diagnosis of any autoinmune disease. * Have received radiotherapy, chemotherapy or immunosuppressive treatments, systemic corticosteroids and/or anticoagulants the 30 days prior to inclusion * Regular treatment with AINES or other antiinflammatory drugs * Previous history of chronic hepatitis or heatic cirrhosis * Positive markers for VHC, AgHBs, VIH I/II or Treponema pallidum * Uncontrolled diabetes mellitus (Glycosylated hemoglobin higher than 9%) * Subjects submitted to hemodyalisis * Presence of malignant tumour, haemangiomas or angioma in the exodontia region. * Previous history of ischemic cardiopathy in the last year. * Pregnancy or womens in childbearing age who do not take contraception measures. * Nursing womens * Metabolic bone disease * Ongoing treatment with biphosphonates both through oral or intravenous administration * Smoking habits (\> 10 cigarrettes/day) * In general, any disability to participate in the study