Omer, Z.Q. and Karim, H.O. 2018. Prevalence of malocclusion and orthodontic treatment need in a sample of 12-15-year-old kurdish schoolchildren in Ranyia district. Erbil Dental Journal (EDJ). 1, 2 (Dec. 2018), 61–70. DOI:https://doi.org/10.15218/edj.2018.09.