Abstract：
:This study aimed to define the width and length of the dental arch in 12-year-old Vietnamese children, and to elucidate differences between genders and among ethnic groups. A cross-sectional study was conducted in 4565 12 years-old children from the 4 major ethnic groups in Vietnam (Kinh, Muong, Thai, and Tay), with a healthy and full set of 28 permanent teeth that had never had any orthodontic treatment and with no reconstructive materials at the measured points. The mean variables in all subjects were 36.39 mm for upper inter-canine width; 46.88 mm for upper inter-first molar width; 59.43 mm for upper inter-second molar width; 10.41 mm for upper anterior length; 32.15 mm for upper posterior length 1; 45.52 mm for upper posterior length 2; 28.31 mm for lower inter-canine width; 41.63 mm for lower inter-first molar width; 54.57 mm for lower inter-second molar width (LM2W); 7.06 mm for lower anterior length (LAL); 26.87 mm for lower posterior length 1 (LP1L); and 41.29 mm for lower posterior length 2. Significant differences in these parameters between genders were found in all ethnic groups, except for LAL in the Kinh and Thai groups, and LP1L in the Tay group. Significant ethnic differences were also found in almost all parameters except LM2W in both males and females. Taken together, the representative sizes of dental arches of 12-year-old Vietnamese children have been defined. Our data indicate that there are some variations in dental arch dimensions among ethnic groups and between genders.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Dung TM,Ngoc VTN,Hiep NH,Khoi TD,Xiem VV,Chu-Dinh T,Cieslar-Pobuda A,Stoufi E,Show PL,Tao Y,Bac ND,Van Ba N,Le QA,Pham VH,Chu DTdoi
10.1038/s41598-019-39710-4subject
Has Abstractpub_date
2019-02-28 00:00:00pages
3101issue
1issn
2045-2322pii
10.1038/s41598-019-39710-4journal_volume
9pub_type
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