Miyoshi S, Tanaka S, Kunimatsu H, Murakami Y, Fukami M, Fujisawa S
Department of Oral Anatomy 1, Fukuoka Dental College, Fukuoka, Japan.
Oral Dis. 2000 Mar;6(2):99-102. doi: 10.1111/j.1601-0825.2000.tb00108.x.
To clarify the prevalence of supernumerary primary teeth in Japanese children, we evaluated this prevalence in a sample of 8122 children aged 3-6 years. Furthermore, we undertook a statistical comparison of the findings of the present study with those of previous investigations on the prevalence of supernumerary primary teeth in Japanese, Chinese and Caucasian children.
The subjects used in the study consisted of 8122 children aged 3-6 years (4102 boys and 4020 girls). The children were examined in kindergartens.
The prevalence of supernumerary primary teeth was recorded by visual inspection. Statistical analysis was carried out using the chi 2 test.
Four cases of supernumerary primary teeth were found among the children examined, and thus the prevalence was 0.05%. All of the supernumerary primary teeth were located in the maxillary lateral incisor area.
The prevalence in a sample of 8122 Japanese children was 0.05% and that in a combined sample of 65,068 Japanese children was 0.06%.
为明确日本儿童额外乳牙的患病率，我们对8122名3至6岁儿童的样本进行了患病率评估。此外，我们对本研究结果与之前关于日本、中国和白种儿童额外乳牙患病率的调查结果进行了统计学比较。
本研究使用的对象包括8122名3至6岁儿童（4102名男孩和4020名女孩）。这些儿童在幼儿园接受了检查。
通过目视检查记录额外乳牙的患病率。使用卡方检验进行统计分析。
在接受检查的儿童中发现了4例额外乳牙，因此患病率为0.05%。所有额外乳牙均位于上颌侧切牙区域。
8122名日本儿童样本中的患病率为0.05%，65068名日本儿童的合并样本中的患病率为0.06%。
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