Influence of Salivary PH and Urea Level on Calculus Formation – A Clinico – Biochemical Study
BACKGROUND: Studies have documented the importance of alkaline pH for deposition of calcium phosphate, thereby aiding plaque mineralization. The ureolytic pH response promotes calculus formation by increasing the saturation level of calcium phosphate in plaque fluid. Therefore, AIM - A study was conducted to assess the effect of salivary pH and urea level in mild moderate and heavy calculus formers. METHODS: Group A- Mild calculus formers Group B- Moderate calculus formers Group C- Heavy calculus formers 10 subjects were assigned to each group. Salivary pH was recorded by using pH indicator strips as soon as saliva was collected in a sterile container. Thereafter, biochemical estimation of salivary urea was performed. RESULT-: There was no statistically significant difference in pH levels between Group A and Group B (p=0.97) but significant difference between Group A and Group C (p= 0.01).There was a highly significant difference between Group A and Group C in urea levels .(p<0.001). CONCLUSION: Salivary urea has a major influence on calculus formation, and though evidence suggests that pH has a role in calculus formation, the present study did not show any significant relation between pH and calculus formation.