TABLE 1.

Inclusion and exclusion criteria.

Inclusion criteria	Exclusion criteria
1. Articles written in English only. 2. Publications on the effects of salivary free radicals generated through smoking and alcohol consumption on oral health 3. Results obtained from experiments participated by humans as well as experimental works, including in vitro studies. 4. Meta-analyses.	1. Publications written in a language other than English. 2. Publications that did not evaluate the effects of salivary free radicals generated by smoking and alcohol consumption on oral health 3. Surveys. 4. Case descriptions.