First Permanent Molars and Permanent Incisors Teeth by Tooth Prevalence of Molar–Incisor–Hypomineralisation in a Group of Spanish Schoolchildren

Svrha rada: Molarno-incizivna hipomineralizacija (MIH) poremećaj je u razvoju zuba koji zahvaća prve trajne kutnjake i trajne sjekutiće. Prevalencija MIH-a u literaturi varira između 2,5 i 40 posto svjetske dječje populacije. Malo je informacija o pojavnosti toga poremećaja među djecom u Španjolskoj. Svrha rada bila je ispitati njegovu učestalost među školskom djecom iz Barcelone (Španjolska). Materijali i metode: Provedeno je istraživanje poprečnog presjeka koje je uključivalo 705 djece u dobi od 6 do 14 godina i 11 mjeseci. Svi su klinički pregledani u skladu s kriterijima Europske akademije za dječju stomatologiju za dijagnozu MIH-a. Rezultati: Pronađeno je ukupno 56 slučajeva MIH-a – 22 (39,3 %) kod dječaka i 34 (60,7 %) kod djevojčica. Prevalencija je iznosila 7,94 posto (6,39 % za dječake i 9,41 % za djevojčice). Lezije MIH-a češće su zabilježene kod djevojčica negoli kod dječaka (c2 = 4,9, p = 0,023) – omjer muških/ženskih osoba iznosi 1:1,54. U oba spola gornji zubi bili su češće zahvaćeni negoli donji, s omjerom gornji/donji od 1,86/1 za dječake i 1,68/1 za djevojčice. Zaključak: S obzirom na spol i zahvaćene zube, češće su bili pogođeni gornji zubi i djevojčice.Background: Molar-incisor-hypomineralisation (MIH) is a disturbance in dental development that commonly involves first permanent molars but permanent incisors may also be compromised. The prevalence of MIH in the literature varies between 2.5% and 40% of the world child population. Little information is gained on the prevalence of MIH among children in Spain. Aim: The aim of this study was to investigate the prevalence of MIH among school children from Barcelona, Spain. Material and methods: A cross-sectional study which included 705 children, aged 6 -14 years and 11 months was carried out. Full mouth examinations were performed using the European Academy of Paediatric Dentistry (EAPD) criteria for the diagnosis of MIH. Results: A total of 56 cases of MIH were found, 22 (39.3%) boys and 34 (60.7%) girls. The prevalence was 7.94% (6.39% for boys and 9.41% for girls). MIH lesions were seen more often in girls than boys (c2 = 4.9, p= 0.023) the male/female ratio being 1:1.54. Upper teeth were more prevalent than lower teeth in both genders with an upper/lower ratio of 1.86/1 for boys and 1.68/1 for girls. Conclusion: Considered either by gender or by teeth, upper teeth and girls were ahead in our sample