Prospective observation of eruption of deciduous teeth in infants
Objective:To observe the eruption of deciduous teeth in infants and analyze the influencing factors.Methods:Three hundred and forty-seven healthy infants born at full term whose deciduous teeth had not yet erupted were observed from June 2021 to August 2023 in Xujiahui Community of Xuhui District,Shanghai,prospective observations were conducted on the time of first deciduous tooth eruption and the number of deciduous teeth at one year old,and data at birth and after birth,as well as maternal pregnancy were obtained in the form of questionnaires.Results:The median of the time of first deciduous tooth eruption in the infants(P5～P95)was 6.80 months(4.81-10.43),97.1%of erupted first deciduous tooth in the infants was located at the mandibular central incisor,and the median number of erupted deciduous teeth in infants at one year old was 8(2-9).The generalized linear mode multivariate analysis found that the time of first deciduous tooth eruption(β=-0.918,P＜0.001),the number of erupted first deciduous teeth(β=0.500,P=0.002),and the properties of the fruits consumed(β=0.680,P＜0.001)were related to the number of erupted deciduous teeth at one year old;with preference for neither meats nor vegetables as the control,single preference for meat or vegetarian dishes(β=0.999,P=0.001),preference for both meats and vegetables(β=1.139,P＜0.001)were related to the number of erupted deciduous teeth at 1 year old.Conclusion:The number of erupted deciduous teeth at one year old is 8(2-9),the time of first deciduous tooth eruption,the number of erupted first deciduous teeth,the properties of the fruits consumed,and preference for complementary food are the influencing factors of the number of erupted deciduous teeth at one year old.In order to ensure the eruption of deciduous teeth,it is necessary to add complementary foods on time,avoid being picky eaters and gradually change the nature of food,and gradually add granular,strip-shaped,and flaky foods in time.
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