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      Association between body mass index with premature eruption of second permanent molars in children aged 9–12 in Bengbu City


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          Objective To investigate the epidemiological characteristics of premature eruption of permanent molars and its aasociation with body mass index (BMI), to provide a reference for childhood oral health promotion.

          Methods A total of 861 children aged 9 to 12 years from two primary schools in Bengbu City were selected by cluster sampling method. Parental questionnaire was administered to collect socio-demographic information. The eruption of second permanent molars were examined. Data was analyzed by multivariate Logistic regression model and margins command.

          Results The detection rate of premature eruption of second permanent molars was 26.5% (228), 27.5% in boys and 24.9% in girls (χ 2=0.73, P=0.39). Early detection rate of second permanent molars (39.0%) was significantly higher in obese group than normal weight group (21.5%) (χ 2=21.85, P<0.01). Logistic regression analysis showed that obesity was positively correlated with the risk of premature eruption of second permanent molars ( OR=3.55, 95% CI=2.14–5.87, P<0.01). Overweight was not associated with higher risk of premature eruption of second permanent molars ( OR=1.64, 95% CI=0.95–2.81, P=0.07). Being female was associated with higher risk of premature eruption of second permanent molars compared to age-matched peers ( OR=2.19, 95% CI=1.42–3.39, P<0.01).

          Conclusion Childhood obesity is associated with higher risk for premature eruption of second permanent molars. Girls are more likely to have second permanent molar erupted in advance compared to age-matched boys.


          【摘要】 目的 探究儿童恒磨牙早萌的流行病学特征及其与体质量指数 (BMI) 的关联, 为促进儿童口腔健康提供参考。 方法 整群选取蚌埠市 2 所小学 861 名 9~12 岁儿童, 开展父母问卷采集社会人口统计学信息, 检査并记录第二恒磨牙萌 出情况。采用多因素 Logistic 回归模型和边际效应命令分别探讨体重状态及 BMI 与第二恒磨牙早萌风险的关联。 结果 第二恒磨牙早萌检出率为 26.5% (228 名), 其中男童检出率为 27.5%, 女童为 24.9%, 差异无统计学意义 (χ 2=0.73, P=0.39)。肥胖组儿童第二恒磨牙早萌检出率 (39.0%) 髙于正常体重组 (21.5%) (χ 2=21.85, P<0.01)。肥胖与第二恒磨牙早 萌风险呈正相关 ( OR=3.55, 95% CI=2.14~5.87, P<0.01); 超重与第二恒磨牙早萌风险的关联无统计学意义 ( OR=1.64, 95% CI=0.95~2.81, P=0.07)。女童较同年龄男童第二恒磨牙早萌发生风险更髙 ( OR=2.19, 95% CI=1.42~3.39, P<0.01)。 结论 肥胖儿童恒磨牙早萌发生风险显著增加, 同年龄女童第二恒磨牙早萌较男童常见。

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          Author and article information

          Chinese Journal of School Health
          Chinese Journal of School Health (China )
          01 April 2022
          01 April 2022
          : 43
          : 4
          : 586-589
          [1] 1College & Hospital of Stomatology, Anhui Medical University, Key Lab. of Oral Diseases Research of Anhui Province, Hefei (230032), China
          Author notes
          *Corresponding author: CHEN Xin, E-mail: 2665297467@ 123456qq.com
          © 2022 Chinese Journal of School Health

          This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 Unported License (CC BY-NC 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See https://creativecommons.org/licenses/by-nc/4.0/.

          Self URI (journal-page): http://www.cjsh.org.cn
          Journal Article

          Ophthalmology & Optometry,Pediatrics,Nutrition & Dietetics,Clinical Psychology & Psychiatry,Public health
          Child,Tooth eruption,Molar,Regression analysis,Body mass index


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