Table 3.

Assessment of risk of bias for Haas et al. (2008) [24].

Domain	Support for Judgment	Authors’ Judgment
Selection bias
Random sequence generation	Participants were randomly assigned by means of a draw	Low risk of bias
Allocation concealment	Medications were stored in opaque-coloured bottles identified only by the respective code of each participant	Low risk of bias
Performance bias
Blinding of participants	Participants were masked from medications types	Low risk of bias
Blinding of personnel	Both periodontists involved in the treatment and clinical examination were masked from the identity of participants	Low risk of bias
Detection bias
Blinding of outcome assessor	Blinding was ensured	Low risk of bias
Attrition bias
Incomplete outcome data	There was no drop out of participants	Low risk of bias
Reporting bias
Selective reporting	The article includes all expected outcomes, including those that were pre-specified	Low risk of bias