The rehabilitation of lost teeth, by means of implants has grown exponentially and thus the use of antibiotic therapy to prevent postoperative infectious pictures. The use of antibiotics has proved beneficial avoiding the failure of a large number of implants from bacterial contamination, in comparison to non-use of these. Although the use of antibiotic prophylaxis or treatment is controversial, studies suggest that antibiotic prophylaxis is more effective than antibiotic treatment in preventing postoperative infections, being 2g amoxicillin one hour before the recommended dose.