['Medline and hand search of the British Journal of Oral and Maxillofacial Surgery, Clinical Implant Dentistry and Related Research, Clinical Oral Investigations, Clinical Oral Implants Research, European Journal of Oral Implantology, Implant Dentistry, International Journal of Oral and Maxillofacial Implants, International Journal of Oral and Maxillofacial Surgery, Journal of Clinical Periodontology, Journal of Oral Implantology, Journal of Oral and Maxillofacial Surgery, Journal of Periodontology Medicina Oral, Patologa Oral y Cirugía Bucal, and Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology.', 'Search of the literature was made to identify randomised controlled trials (RCTs) on the efficacy of antibiotics compared with a control group (not receiving antibiotics or receiving placebo.', 'All articles selected from the electronic and manual searches were independently assessed by the first and second authors of this study, in accordance with the established inclusion criteria. Two reviewers independently and in duplicate evaluated the quality of the included RCTs as part of the data extraction process.', 'Four RCTs were included in the final review. These four RCTs grouped a total of 2063 implants and a total of 1002 patients.'] Do effect of antibiotics on implant failure and postoperative infection?