Table 1.

Search Strategy.

Search terms	Total	Database
ALL FIELDS: (periodontitis and impotence) OR ALL FIELDS: (periodontitis and sexual dysfunction) OR ALL FIELDS: (periodontitis and erectile dysfunction) OR ALL FIELDS: (periodontal disease and impotence) OR ALL FIELDS: (periodontal disease and sexual dysfunction) OR ALL FIELDS: (periodontal disease and erectile dysfunction) OR ALL FIELDS: (gingivitis and impotence) OR ALL FIELDS: (gingivitis and sexual dysfunction) OR ALL FIELDS: (gingivitis and erectile dysfunction)	47	WES
#1 (impotence) OR ("sexual dysfunction") OR ("erectile dysfunction") OR ("sexual function") (Word variations have been searched) #2 (periodontitis) OR ("periodontal disease") OR ("periodontal infection") OR (gingivitis) OR ("chronic periodontitis") (Word variations have been searched) #3 #1 AND #2	10	Cochrane
((((((((“erectile dysfunction”[MeSH Terms] OR (“erectile”[All Fields] AND “dysfunction”[All Fields])) OR “erectile dysfunction”[All Fields]) OR “impotence”[All Fields]) OR “impotent”[All Fields]) OR “impotency”[All Fields]) OR “erectile dysfunction”[All Fields]) OR “sexual function”[All Fields]) OR “sexual dysfunction”[All Fields]) AND ((((((((((((“periodontal”[All Fields] OR “periodontally”[All Fields]) OR “periodontically”[All Fields]) OR “periodontics”[MeSH Terms]) OR “periodontics”[All Fields]) OR “periodontic”[All Fields]) OR “periodontitis”[MeSH Terms]) OR “periodontitis”[All Fields]) OR “periodontitides”[All Fields]) OR ((((((((“periodontal”[All Fields] OR “periodontally”[All Fields]) OR “periodontically”[All Fields]) OR “periodontics”[MeSH Terms]) OR “periodontics”[All Fields]) OR “periodontic”[All Fields]) OR “periodontitis”[MeSH Terms]) OR “periodontitis”[All Fields]) OR “periodontitides”[All Fields])) OR (((((((“gingiva”[MeSH Terms] OR “gingiva”[All Fields]) OR “gingival”[All Fields]) OR “gingivally”[All Fields]) OR “gingivals”[All Fields]) OR “gingivitis”[MeSH Terms]) OR “gingivitis”[All Fields]) OR “gingivitides”[All Fields])) OR “periodontal infection”[All Fields]) OR “chronic periodontitis”[All Fields])	46	MEDLINE
#3. #1 AND #2 #2. 'impotence'/exp OR impotence OR 'sexual dysfunction' OR 'sexual function' OR 'erectile dysfunction' #1. 'periodontitis'/exp OR periodontitis OR 'periodontal infection' OR gingivitis OR 'periodontal disease' OR 'chronic periodontitis'/exp OR 'chronic periodontitis'	146	Embase
( ALL ( periodontitis AND impotence ) OR ALL ( periodontitis AND sexual AND dysfunction ) OR ALL ( periodontitis AND erectile AND dysfunction ) OR ALL ( periodontal AND disease AND impotence ) OR ALL ( periodontal AND disease AND sexual AND dysfunction ) OR ALL ( periodontal AND disease AND erectile AND dysfunction ) OR ALL ( gingivitis AND impotence ) OR ALL ( gingivitis AND sexual AND dysfunction ) OR ALL ( gingivitis AND erectile AND dysfunction ) )	1182	SCOPUS