RESUMEN
Elevation of Blood Urea Nitrogen in renal diseases results concomitant increase in Salivary Urea levels. Aims : Determine if there was any correlation between the Salivary Urea levels with that of Blood Urea levels. Material & Methods : samples of blood and saliva were taken from Hemodialysis and control groups to assess the Blood Urea Nitrogen (BUN) and Salivary Urea (SU) levels respectively under strict aseptic precautions. Informed consent was taken from patients and ethical committee approval taken. Results : showed no statistically significant difference between Blood Urea and Salivary Urea in the Hemodialysis group (p>0.05). There was a statistically significant difference between Hemodialysis group and Control group with respect to Blood Urea and Salivary Urea levels. (p<0.001). Conclusion : saliva can be used as a noninvasive diagnostic marker tool.