“…The continents covered were Africa (Albandar, Muranga, & Rams, ; Elamin, Skaug, Ali, Bakken, & Albandar, ; Harley & Floyd, ; Haubek et al, ; Kissa et al, ), with 2 Moroccan studies (Haubek et al, ; Kissa et al, ), Asia (Ababneh, Hwaij, & Khader, ; Albandar, ; Cho, You, & Jeong, ; Ereş, Sarıbay, & Akkaya, ; Kowashi, ; Levin, Baev, Lev, Stabholz, & Ashkenazi, ; Nanaiah, Nagarathna, & Manjunath, ; Roozegar, Havasian, Panahi, & Hashemian, ; Sadeghi, ; Uchiyama et al, ; Yee, Subramaniam, Raman, & Loo, ), Europe (Hoover, Ellegaard, & Attström, ; Kronauer, Borsa, & Lang, ; Petruţiu et al, ; Saxby, ; Saxén, ) and north America (Barnett, Baker, & Yancey, ; Horning, Hatch, & Lutskus, ; Löe & Brown, ; Melvin, Sandifer, & Gray, ; Neely, ) and south America (Corraini, Pannuti, Pustiglioni, Romito, & Pustiglioni, ; Cortelli, Cortelli, Pallos, & Jorge, ; Hermes, Baumhardt, & Rösing, ; López, Ortueta, & Hdez, ; López, Ríos, Pareja, & Fernández, ; Susin & Albandar, ; Tinoco et al, ). The years of publication ranged from 1980 to 2016.…”