Medina Aida Carolina, Pozo Rodrigo Del, de Cedres Lucila Blanco
J Clin Pediatr Dent. 2016;40(3):227-34. doi: 10.17796/1053-4628-40.3.227.
Dental agenesis is the most common developmental anomaly in humans, frequently associated with disorders in dental development and maturation.
The purpose of this study is to determine radiographic variations in dental maturation in a group of Venezuelan children with dental agenesis.
1,188 panoramic radiographs, from healthy patients ages 5 to 12 years old were studied for agenesis of permanent teeth. Dental maturation was assessed by relative eruption and dental age according to Nolla, comparing children affected with dental agenesis to a stratified control group selected from the same population, excluding children with premature loss of primary teeth in the left quadrants and unclear radiographs. Descriptive analysis, and differences between means and medians (Student t test, Kruskall-Wallis p=0.05) were performed.
Medians for Nolla stages were similar between groups, with delay in tooth formation in the agenesis group for second molars (p<0.05) and maxillary lateral incisors and second premolars. Dental age was significantly underestimated for both groups, -0.89 (±0.78) for the control group and -1.20 (±0.95) for the study group. Tooth eruption was similar between groups.
Dental age was significantly delayed in Venezuelan children with dental agenesis, with variable significance for tooth formation of studied teeth.
牙齿发育不全是人类最常见的发育异常，常与牙齿发育和成熟障碍相关。
本研究的目的是确定一组患有牙齿发育不全的委内瑞拉儿童牙齿成熟的影像学差异。
对1188张来自5至12岁健康患者的全景X线片进行恒牙发育不全研究。根据诺拉法，通过相对萌出和牙齿年龄评估牙齿成熟度，将患有牙齿发育不全的儿童与从同一人群中选取的分层对照组进行比较，排除左象限乳牙过早脱落和X线片不清楚的儿童。进行描述性分析以及均值和中位数之间的差异分析（学生t检验，克鲁斯卡尔-沃利斯检验，p = 0.05）。
两组之间诺拉阶段的中位数相似，发育不全组的第二磨牙（p < 0.05）、上颌侧切牙和第二前磨牙的牙齿形成延迟。两组的牙齿年龄均被显著低估，对照组为-0.89（±0.78），研究组为-1.20（±0.95）。两组之间的牙齿萌出情况相似。
患有牙齿发育不全的委内瑞拉儿童的牙齿年龄显著延迟，所研究牙齿的牙齿形成具有不同程度的显著性差异。
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