 - Patients will be recruited according to the following inclusion criteria: absence of any systemic disease that might compromise implant integration or wound healing, appropriate periodontal health measured through periodontal indexes, presence of premolars with indications of extractions, presence of adjacent teeth, absence of fenestrations, presence of vestibular alveolar wall with a minimum of 0.5mm of thickness. Patients who have undergone CT scanning in the past 5 years and heavy smokers more than 20 cigarettes per day will not be included in the study. 