This is a prospective, longitudinal, observational, cohort study investigating young adults undergoing surgical extraction of a wisdom tooth with and without antibiotics post-operatively. The prescription of antibiotics will be based on clinical judgment based on case complexity, trauma and length of procedure. No randomization will be performed. Saliva will be collected at seven observational time points ( Baseline, one week ,two weeks, three weeks , one month,three months and six months.) and Supragingival plaque samples will be collected at four observational time points ( Baseline , one week , one month, and 3 months) .A control group of 15 subjects who do not undergo dental extractions or antibiotic treatment will be recruited after obtaining informed consent and will be followed up for the same seven time points..Routine standard care will be observed. No new medications are triedThe samples will be analysed for identification of bacterial genes using 16 S r RNA gene sequecing and QPCR for change in the antibiotic resistance genes overtime. Kindly note that in the current study the participants are patients who are already scheduled to undergo tooth extractions with or without antibiotic treatment based on clinical judgement by the clinician performing the extraction. ( These patients are on the waiting list for third molar extractions in the dental hospital concerned.)