Table 2.

Search strategies for each database.

Database	Strategy	Results
PubMed	(“temporomandibular joint” OR “temporomandibular joint disease” OR “temporomandibular joint disk” OR “temporomandibular joint disorder” OR “temporomandibular joint syndrome” OR “TMJ syndrome” OR TMJ OR “Myofascial pain dysfunction syndrome” OR “TMJ disease” OR “TMJ disorder” OR “tmj disorder” OR tmj OR “tmj disease” OR “tmj syndrome” OR “muscle disorder” OR “temporomandibular articular disk” OR TMD OR “temporomandibular pain”) AND (estrogens OR “estrogen replacement therapy” OR “estrogenic hormones” OR “gonadal hormones” OR “sex hormones “ OR “polycystic ovary syndrome” OR “polycystic ovarian syndrome” OR “menstrual cycle” OR “menstruation disorder” OR “menstruation disturbance” OR postmenopause OR “hormonal oral contraceptive” OR “premenstrual syndrome” OR estradiol OR “estradiol levels” OR progesterone)	368
Scopus	TITLE-ABS-KEY (“TMD” OR “temporomandibular joint” OR “temporomandibular joint disorder”) AND (“estrogens”)	260
Embase	(‘tmd’ OR ‘temporomandibular joint’ OR ‘temporomandibular joint disorder’) AND (‘estrogens’ OR ‘gonadal hormones’ OR ‘sex hormones’ OR ‘menstrual disorders’ OR ‘postmenopause’ OR ‘oral contraceptive agent’)	200
Web of Science	(TS = (temporomandibular joint disorder) OR TS = (TMD) OR TS = (internal derangement)) AND (TS = (estrogens) OR TS = (gonadal hormones) OR TS = (sexual hormones) OR TS = (menstruation disorder) OR TS = (menstrual cycle))	202