Table 1 The details of search strategy in databases

Pubmed

((periodontal regeneration OR periodontitis) AND stem cell) OR ((periodontal regeneration OR periodontitis) AND mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND mesenchymal stromal cell) OR ((periodontal regeneration OR periodontitis) AND dental stem cell) OR ((periodontal regeneration OR periodontitis) AND periodontal ligament stem cell) OR ((periodontal regeneration OR periodontitis) AND dental pulp stem cell) OR ((periodontal regeneration OR periodontitis) AND gingival mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND umbilical cord mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND bone marrow mesenchymal stem cell)

CENTRAL

((periodontal regeneration OR periodontitis) AND stem cell) OR ((periodontal regeneration OR periodontitis) AND mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND mesenchymal stromal cell) OR ((periodontal regeneration OR periodontitis) AND dental stem cell) OR ((periodontal regeneration OR periodontal ligament stem cell) AND stem cell) OR ((periodontal regeneration OR periodontitis) AND dental pulp stem cell) OR ((periodontal regeneration OR periodontitis) AND gingival mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND umbilical cord mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND bone marrow mesenchymal stem cell) in All Text

WOS

((periodontal regeneration OR periodontitis) AND stem cell) OR ((periodontal regeneration OR periodontitis) AND mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND mesenchymal stromal cell) OR ((periodontal regeneration OR periodontitis) AND dental stem cell) OR ((periodontal regeneration OR periodontitis) AND periodontal ligament stem cell) OR ((periodontal regeneration OR periodontitis) AND dental pulp stem cell) OR ((periodontal regeneration OR periodontitis) AND gingival mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND umbilical cord mesenchymal stem cell) OR ((periodontal regeneration OR periodontitis) AND bone marrow mesenchymal stem cell)

Embase

(‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘stem cell’/exp OR ‘stem cell’ OR ((‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘mesenchymal stem cell’/exp OR ‘mesenchymal stem cell’ OR (mesenchymal AND (‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical)) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘mesenchymal stromal cell’/exp OR ‘mesenchymal stromal cell’ OR (mesenchymal AND stromal AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical)) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘dental stem cell’/exp OR ‘dental stem cell’ OR ((‘dental’/exp OR dental) AND (‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical)) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘periodontal ligament stem cell’/exp OR ‘periodontal ligament stem cell’ OR (periodontal AND (‘ligament’/exp OR ligament) AND (‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical)) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘dental pulp stem cell’/exp OR ‘dental pulp stem cell’ OR ((‘dental’/exp OR dental) AND (‘pulp’/exp OR pulp) AND (‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical)) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘gingival mesenchymal stem cell’/exp OR ‘gingival mesenchymal stem cell’ OR (gingival AND mesenchymal AND (‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical)) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘umbilical cord mesenchymal stem cell’/exp OR ‘umbilical cord mesenchymal stem cell’ OR ((‘umbilical’/exp OR umbilical) AND cord AND mesenchymal AND (‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical)) OR ((‘periodontal regeneration’/exp OR ‘periodontal regeneration’ OR (periodontal AND (‘regeneration’/exp OR regeneration)) OR ‘periodontitis’/exp OR periodontitis) AND (‘bone marrow mesenchymal stem cell’/exp OR ‘bone marrow mesenchymal stem cell’ OR ((‘bone’/exp OR bone) AND (‘marrow’/exp OR marrow) AND mesenchymal AND (‘stem’/exp OR stem) AND (‘cell’/exp OR cell))) AND (‘clinical’/exp OR clinical))

Scopus

TITLE-ABS-KEY ((( periodontal AND regeneration OR periodontitis) AND stem AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND mesenchymal AND stem AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND mesenchymal AND stromal AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND dental AND stem AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND periodontal AND ligament AND stem AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND dental AND pulp AND stem AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND gingival AND mesenchymal AND stem AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND umbilical AND cord AND mesenchymal AND stem AND cell AND clinical) OR ((periodontal AND regeneration OR periodontitis) AND bone AND marrow AND mesenchymal AND stem AND cell AND clinical))

Wanfang

All:((periodontal regeneration OR periodontitis) AND stem cell AND clinical) OR All:((periodontal regeneration OR periodontitis) AND mesenchymal stem cell AND clinical) OR All:((periodontal regeneration OR periodontitis) AND mesenchymal stromal cell AND clinical) OR All:((periodontal regeneration OR periodontitis) AND dental stem cell AND clinical)) OR All:((periodontal regeneration OR periodontitis) AND umbilical cord mesenchymal stem cell AND clinical) OR All:((periodontal regeneration OR periodontitis) AND bone marrow mesenchymal stem cell AND clinical)

CNKI

(All Text%(periodontal regeneration OR periodontitis) AND stem cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND mesenchymal stem cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND mesenchymal stromal cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND dental stem cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND periodontal ligament stem cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND dental pulp stem cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND gingival mesenchymal stem cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND umbilical cord mesenchymal stem cell AND clinical) OR (All Text%(periodontal regeneration OR periodontitis) AND bone marrow mesenchymal stem cell AND clinical)