Table 1 Search strategy used and adapted for the four different electronic databases.

From: Collagen-depletion strategies in dentin as alternatives to the hybrid layer concept and their effect on bond strength: a systematic review

Database

Search strategy

PubMed/Medline

Dentin* AND (“collagen removal” OR “collagen depletion” OR “collagen-depletion” OR deprotein* OR bromelain OR trypsin OR papain OR pepsin) AND (self-adhesive cement OR cement OR hydrophobic resin OR adhesive OR DBA OR “dentin bonding agent” OR dental resin)

Scopus

TITLE-ABS-KEY (dentin*) AND ((“collagen removal”) OR (“collagen-depletion”) OR (“collagen depletion”) OR (deprotein*) OR (“pepsin”) OR (“papain”) OR (“trypsin”) OR (“bromelain”)) AND ((“adhesive”) OR (“DBA”) OR (“self-adhesive cement”) AND (“cement”) OR (“experimental resin”) OR (“hydrophobic resin”) OR (“dentin bonding agent”) OR (“dental resin”))

EMBASE

Dentin* AND (“collagen removal” OR “collagen depletion” OR “collagen-depletion” OR deprotein* OR bromelain OR trypsin OR papain OR pepsin) AND (self-adhesive cement OR cement OR hydrophobic resin OR adhesive OR DBA OR “dentin bonding agent" OR dental resin)

SciELO

(dentin) AND ((((((((deprotein*) OR (collagen removal) OR (collagen depletion) OR (collagen-depletion) OR (trypsin) OR (bromelain) OR (pepsin) OR (papain))))))))