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The aim of this study was to evaluate if antibiotic prophylaxis reduces the bacterial contamination of bone particles collected directly from the burs used for implant site preparation. Thirty-four patients underwent the surgical procedures for a total of 34 implant sites. One 1 gr. tablet of amoxicillin + clavulanic acid was given to the test group 12 hours and 1 hour before the surgery. The control group did not take antibiotic prophylaxis. Bone particles were collected and centrifuged. The suspensions were subjected to serial dilutions and each dilution was examined twice using a spatulation technique in Trypticase Soy Agar (TSA), in Sabouraud Dextrose Agar, and in Mitis Salivarius Agar (MSA). The number of colonies was calculated and the identification of various microorganisms was made. The most represented species, in both groups of patients, belonged to the “oral Streptococci.” For TSA, the test and control groups differed significantly ( p  = 0.018). Conversely, there was no significant difference for MSA ( p  = 0.201) and for the number of bacterial species isolated in the samples of the two groups of patients ( p  = 0.898). The antibiotic prophylaxis reduced, but did not cancel, the risk of infection of the autogenous particulate bone graft. This trial is registered with  IRCT2017102537002N1 .

The Role of Antibiotic Prophylaxis in Reducing Bacterial Contamination of Autologous Bone Graft Collected from Implant Site