NSPT was done after administration of pre procedural mouth rinse in the test group (20 smokers with chronic periodontitis).Clinical parameters (GI,PI) were assessed at baseline and at the end of 3 months.2 ml blood was drawn to asses the plasma hepatocyte growth factor levels at baseline and at the end of 3 months.

Scaling and root planing was done after administration of pre procedural mouth rinse in the control group (20 non smokers with chronic periodontitis).Clinical parameters (GI,PI) were assessed at baseline and at the end of 3 months.2 ml blood was drawn to asses the plasma hepatocyte growth factor levels at baseline and at the end of 3 months.

NSPT was done by ultrasonic scalers after administration of pre procedural mouth rinse in the test group (20 smokers with chronic periodontitis).Clinical parameters (GI,PI) were assessed at baseline and at the end of 3 months.2 ml blood was drawn to assess the plasma hepatocyte growth factor levels at baseline and at the end of 3 months.

The change in plasma hepatocyte growth factor level was measured at baseline and at the end of 3 months after scaling and root planing.2 ml blood was drawn from the patient to assess the hepatocyte growth factor levels.biochemical analysis was done by ELISA test i.e., blood samples from both smokers and non smokers with chronic periodontitis were taken at baseline and at the end of 3 monthd

The secondary outcome of the study is to measure gingival index at baseline and 3 months after scaling and root planing. gingival index was assesed using williams periodontal probe