Objective: To investigate the prevalence of malocclusion with respect to grade, sex, and year among Korean pre-adolescent and adolescent students during 2012-2017.

Methods: A total of 165,996 students (first grade [E1, 6-7 years of age], fourth grade [E4, 9-10 years], seventh grade [M1, 12-13 years], and tenth grade [H1, 15-16 years]) were selected by stratified sampling method and underwent the nationwide oral health examination performed by the Ministry of Education, Republic of Korea. The malocclusion assessments based on dentists' judgments were "no malocclusion," "needs orthodontic treatment (N-OTx)," and "under orthodontic treatment (U-OTx)." The sum of N-OTx and U-OTx cases was determined as the number of students with malocclusion. After analyzing the prevalence of malocclusion according to grade, sex, and year-by-year differences, Pearson correlation analyses and two-way analyses of variance were performed.

Results: The prevalence of malocclusion was 18.7%, which increased with the grades (E1 [8.3%] < E4 [15.8%] < M1 [22.9%] < H1 [25.3%], < 0.001). However, there was no significant difference in the prevalence of malocclusion in each grade group for the period ( > 0.05) without significant correlation (E1, ρ = 0.129; E4, ρ = -0.495; M1, ρ = 0.406; H1, ρ = -0.383; all > 0.05). The prevalence of malocclusion within each grade group over the six-year period was more prominent in the female ( < 0.0001).

Conclusions: Further studies are necessary to modify the malocclusion assessment method to account for specific types of malocclusion in pre-adolescent and adolescent students.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7270932PMC
http://dx.doi.org/10.4041/kjod.2020.50.3.197DOI Listing

Publication Analysis

Top Keywords

prevalence malocclusion
24
pre-adolescent adolescent
12
adolescent students
12
malocclusion grade
12
malocclusion
10
nationwide oral
8
oral health
8
grade
8
grade sex
8
orthodontic treatment
8

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!