Abstract：
OBJECTIVE: The aim of this study was to investigate the impact of birth weight on tooth development in children aged 7-8 years.
METHODS: This retrospective cohort study comprised 75 children born at Bint Al-Huda Hospital, Bojnurd, in 2013-2014. The children were categorized into three groups based on their birth weight: Normal Birth Weight (NBW), Low Birth Weight (LBW), and Very Low Birth Weight (VLBW). Panoramic radiographs were taken for orthodontic examination, and Demirjian\'s 8-teeth method was employed to determine dental age. The study compared dental and chronological age within each group. Data analysis utilized SPSS software version 26, employing One-way ANOVA and chi-square tests. Statistical significance was set at P ≤ 0.05.
RESULTS: The mean difference in dental and chronological age for Very Low Birth Weight (VLBW) children was 0.22 ± 0.44 years, for Low Birth Weight (LBW) children it was 0.19 ± 0.45 years, and for Normal Birth Weight (NBW) children, it was 0.08 ± 0.46 years. Although the mean difference decreased with increasing birth weight, this trend did not achieve statistical significance (P = 0.55). Furthermore, no significant differences were observed between the weight groups (P = 0.529) or genders (P = 0.191).
METHODS: This retrospective cohort study comprised 75 children born at Bint Al-Huda Hospital, Bojnurd, in 2013-2014. The children were categorized into three groups based on their birth weight: Normal Birth Weight (NBW), Low Birth Weight (LBW), and Very Low Birth Weight (VLBW). Panoramic radiographs were taken for orthodontic examination, and Demirjian\'s 8-teeth method was employed to determine dental age. The study compared dental and chronological age within each group. Data analysis utilized SPSS software version 26, employing One-way ANOVA and chi-square tests. Statistical significance was set at P ≤ 0.05.
RESULTS: The mean difference in dental and chronological age for Very Low Birth Weight (VLBW) children was 0.22 ± 0.44 years, for Low Birth Weight (LBW) children it was 0.19 ± 0.45 years, and for Normal Birth Weight (NBW) children, it was 0.08 ± 0.46 years. Although the mean difference decreased with increasing birth weight, this trend did not achieve statistical significance (P = 0.55). Furthermore, no significant differences were observed between the weight groups (P = 0.529) or genders (P = 0.191).
摘要：
目的：这项研究的目的是调查出生体重对7-8岁儿童牙齿发育的影响。
方法：这项回顾性队列研究包括在BintAl-Huda医院出生的75名儿童，Bojnurd,2013-2014年。根据出生体重将儿童分为三组：正常出生体重（NBW），低出生体重（LBW）出生体重很低（VLBW）。为正畸检查拍摄了全景X光片，采用Demirjian的8齿方法确定牙齿年龄。该研究比较了每组中的牙齿和实际年龄。数据分析使用SPSS软件版本26，采用单向方差分析和卡方检验。P≤0.05时具有统计学意义。
结果：极低出生体重（VLBW）儿童的牙齿和实际年龄的平均差为0.22±0.44岁，低出生体重（LBW）儿童为0.19±0.45岁，对于正常出生体重（NBW）的儿童，是0.08±0.46年。尽管平均差异随着出生体重的增加而减小，这一趋势没有达到统计学意义(P=0.55).此外，体重组(P=0.529)或性别(P=0.191)之间无显著差异.
方法：这项回顾性队列研究包括在BintAl-Huda医院出生的75名儿童，Bojnurd,2013-2014年。根据出生体重将儿童分为三组：正常出生体重（NBW），低出生体重（LBW）出生体重很低（VLBW）。为正畸检查拍摄了全景X光片，采用Demirjian的8齿方法确定牙齿年龄。该研究比较了每组中的牙齿和实际年龄。数据分析使用SPSS软件版本26，采用单向方差分析和卡方检验。P≤0.05时具有统计学意义。
结果：极低出生体重（VLBW）儿童的牙齿和实际年龄的平均差为0.22±0.44岁，低出生体重（LBW）儿童为0.19±0.45岁，对于正常出生体重（NBW）的儿童，是0.08±0.46年。尽管平均差异随着出生体重的增加而减小，这一趋势没有达到统计学意义(P=0.55).此外，体重组(P=0.529)或性别(P=0.191)之间无显著差异.
