Table 1.

Authors, title, periodical, year and population of the articles considered.

Authors	Title	Periodical and Year	Population
1.Farid Bourzgui, Mourad Sebbar, Mouna Hamza, Laila Lazrak, Zouhair Abidine, Farid El Quars [21]	Prevalence of malocclusions and orthodontic treatment need in 8- to 12-year-old schoolchildren in Casablanca, Morocco	Progress in Orthodontics 2012	1000 subjects between 8 and 12 years old
2.E A Aikins, C O Onyeaso [22]	Prevalence of malocclusion and occlusal traits among adolescents and young adults in Rivers State, Nigeria	Odontostomatol Trop 2014	620 subjects between 13 and 20 years old
3.R Ferro, A Besostri, A Olivieri, E Stellini [23]	Prevalence of occlusal traits and orthodontic treatment needed in 14 year-old adolescents in Northeast Italy	European Journal Pediatric Dentistry 2016	444 subjects of 14 years old
4.Shobha Sundareswaran, Praveen Kizhakool [24]	Prevalence and gender distribution of malocclusion among 13–15-year-old adolescents of Kerala, South India	Indian Journal of Dental Research 2019	1554 subjects between 13 and 15 years old
5.Elham S J Abu Alhaija, Susan N Al-Khateeb, Kazem S Al-Nimri [25]	Prevalence of malocclusion in 13–15 year-old North Jordanian school children	Community Dental Health 2005	1003 subjects between 13 and 15 years old
6.Karla Alvarado, Lydia López, Rosana Hanke, Francis Picón, Sona Rivas-Tumanyan [26]	Prevalence of Malocclusion and Distribution of Occlusal Characteristics in 13- to 18-year-old Adolescents Attending Selected High Schools in the Municipality of San Juan, PR	Puerto Rico Health Science Journal 2017	155 subjects between 13 and 18 years old
7.Stefania Perrotta, Rosaria Bucci, Vittorio Simeon, Stefano Martina, Ambra Michelotti, Rosa Valletta [27]	Prevalence of malocclusion, oral parafunctions and temporomandibular disorder pain in Italian school children: an epidemiological study.	Journal of Oral Rehabilitation 2019	700 subjects between 9 and 11 years old
8.Eliane Traebert, Luiz Gustavo Teixeira Martins, Keila Cristina Raush Pereira, Simone Xavier Silva Costa, Sandra Espíndola Lunardelli, Abelardo Nunes Lunardelli, Jefferson Traebert [28]	Malocclusion in Brazilian Schoolchildren: High Prevalence and Low Impact	Oral Health and Preventive Dentistry 2015	389 subjects between 10 and 15 years old
9.Antanas Šidlauskas, Kristina Lopatiené [29]	The prevalence of malocclusion among 7–15-year-old Lithuanian schoolchildren	Medicina (Kaunas) 2009	1681 subjects between 7 and 15 years old
10.Mohammed Almalky N, Mohammad Elattar H [30]	Prevalence Of Different Types of Malocclusion Among School Children In Makkah Governorate of Saudi Arabia	International Journal of Dentistry and Oral Science 2018	289 subjects between 14 and 17 years old
11.Ravi Kumar Gudipaneni, Raed F. Aldahmeshi, Santosh R. Patil and Mohammad Khursheed Alam [31]	The prevalence of malocclusion and the need for orthodontic treatment among adolescents in the northern border region of Saudi Arabia: an epidemiological study	BMC Oral Health 2018	500 subjects between 14 and 18 years old
12.Matilda Mtaya, Anne Nordrehaug Astrøm, Pongsri Brudvik [2]	Prevalence of malocclusion and its relationship with socio-demographic factors, dental caries, and oral hygiene in 12- to 14-year-old Tanzanian schoolchildren	The European Journal of Orthodontics 2009	1601 subjects between 12 and 14 years old
13.H. Kaur, U.S. Pavithra, R. Abraham [32]	Prevalence of malocclusion among adolescents in South Indian population	Journal of International Societ of Preventive and Community Dentistry 2013	2400 subjects between 13 and 17 years old
14.Ibrahim Erhan Gelgör, Ali Ihya Karaman, Ertugrul Ercan [5]	Prevalence of malocclusion among adolescents in Central Anatolia	European Journal of Dentistry 2017	2329 subjects between 12 and 17 years old