Table 1.

Risk bias factor.

Study	Teeth Randomization	Caries-Free Teeth	Control Group	Samples with Similar Dimensions	Evaluation of Failure Mode	Description of Coefficient of Variation	Sample Size Calculation	Blinding of the Examiner	Risk of Bias
Pamato	Yes	Yes	Yes	Yes	Yes	No	No	No	Medium
Aguiar	Yes	yes	No	Yes	Yes	No	No	No	Medium
Ozturk	Yes	Yes	No	Yes	Yes	No	No	No	Medium
Skupien	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Low
Lorenzoni	Yes	Yes	No	Yes	Yes	No	No	No	Medium
Pekperdahci	Yes	Yes	Yes	Yes	Yes	No	No	No	Medium
Chávez	Yes	Yes	Yes	Yes	Yes	Yes	No	No	Low
Vaz	Yes	No	Yes	Yes	Yes	No	No	No	High
Bacchi	Yes	Yes	Yes	Yes	Yes	No	No	No	Low
Alexandre	Yes	Yes	No	Yes	Yes	No	No	No	Medium
Roperto	Yes	Yes	Yes	Yes	No	No	No	No	Medium