Table 2: Mean Plaque Index (PI) and Percentage of Teeth with Residual Plaque Related to the Operator’s Awareness about the Post-Treatment Chromatic Examination

Operator Awareness Surgery Numbers Mean PI (%) ± Standard Error Mean (%) of Teeth with Plaque Residues ± Standard Error
Yes 20 41.90±4.61 84.2±8.0
No 20 55.26±5.99 92.4±6.0