STATUS OF PRIMARY DOUBLE TOOTH IN CHILDREN IN THE AGE OF 3 TO 5 AND THEIR OCCLUSIONS AT SOME KINDERGARTENS IN HA NOI, VIET NAM, 2017

Lương Minh Hằng1,, Lâm Thị Sen2, Võ Trương Như Ngọc1, Lê Thị Thùy Linh1, Nguyễn Hà Thu1, Vũ Thị Dịu1
1 The Odonto-Stomatology Training Institute, Hanoi Medical University
2 University of Medicine and Pharmacy, Vietnam National University, Hanoi

Main Article Content

Abstract

A cross-sectional descriptive study at 1453 children to describe status of primary double tooth (PDT) at some kindergartens in Ha Noi in 2017, and to evaluate the occlusion in children having these abnormal teeth. Results: The prevalence of  PDT was 2,4% with 92,1% fused teeth and 7,9% germinated teeth. All of PDTs were anterior teeth, 85,9% of them were located in mandibular arch, only 6,7% of the cases exhibited a bilateral distributions, most of the children with PDTs had a unilateral distribution (93,3%). About primary molar relationship (terminal plane): mesial step, distal step and flush terminal plane accounted for 45,7%, 17,1%, and 37,2% respectively. 100% children with geminated teeth had no physiologic space between primary teeth, and in children having fused teeth, this percentage was 90,6%. Conclusions: PDTs were a rarely morphologic abnormality. Most of them were located in anterior area of mandibular arch and exhibited a unilateral distribution. The prevalence of fusion was higher than germination. The presence of PDTs can effect to children’s occlusion.

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References

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