The clinical examination, invalued measurement of both probing depths and bleeding on probing, performed by two experienced examiners who measured the same clinical parameters throughout the study.
In periodontitis in smokers and non-smokers invalued teeth of hopeless prognosis, the mean total salivary glutathione levels were 5.7 [+ or -] 1.8 micromole (p < 0.05), 4.8 [+ or -] 1.3 micromole (p < 0.05) respectively.