Treatment
Following collection of saliva, subjects received single sitting of full mouth scaling and root planing. No antibiotic, anti-inflammatory or any form of chemical plaque control aid was prescribed following treatment. The patients were re-evaluated one month after completion of phase I therapy and saliva was re-sampled. The periodontitis group before phase I therapy was called the BT group, and the same group after completion of 1 month of therapy was called the AT group.