Subjects scheduled for routine surgical extractions who give a written consent to be a part of the study will be recruited. An experienced clinical operator with specialist maxillofacial surgery training (ML Co-A) will be responsible for performing clinical treatment. Prescription of antibiotics will be based on case complexity, difficulty of the operative surgical procedure and time taken. Therefore patients will not be randomized but based on obtaining 15 patients in each group. This is not an intervention study and there is no at risk group as patients are receiving the expected standard of care. 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, three 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.