Table 1.

Inclusion and exclusion criteria according to the PICOS.

Parameter	Inclusion Criteria	Exclusion Criteria
Population	patients with dry socket—both genders, regardless of age	patients with other complications after tooth extraction
Intervention	smoking
Comparison	non-smoking
Outcomes	prevalence of dry socket	prevalence of dry socket with other predisposing factors, such as alcohol, contraceptives, or water pipe
Study design	case-control, cohort and cross-sectional studies	literature reviews, case reports, expert opinion, conference reports
	published after 2000	not published in English