Appendix 1. Cochrane Oral Health Group Trials Register search strategy

(("periodontal disease*" OR periodont* OR "furcation defect*" OR pericoronitis) AND (pregnancy OR "prenatal care" OR pregnan* OR "expectant mother*"))

Appendix 2. CENTRAL search strategy

#1 (Explode) PERIODONTAL DISEASES
#2 periodont* or gingiv*
#3 (furcation next defect*)
#4 pericoronitis
#5 (#1 or #2 or #3 or #4)
#6 (Explode) PREGNANCY
#7 (Explode) PREGNANCY COMPLICATIONS
#8 PREGNANCY OUTCOME
#9 PRENATAL CARE
#10 pregnan*
#11 (expectant next mother*)
#12 (#6 or #7 or #8 or #9 or #10 or #11)
#13 (#5 and #12)

Uppercase denotes MeSH terms, lowercase free text terms.