Department of Orthodontics, Araras Dental School, University Center of Hermínio Ometto Foundation-FHO, Araras, São Paulo, Brazil.
Department of Health Sciences and Child Dentistry, Piracicaba Dental School, UNICAMP, Piracicaba, São Paulo, Brazil.
Orthod Craniofac Res. 2023 Aug;26(3):331-337. doi: 10.1111/ocr.12613. Epub 2022 Oct 30.
Mixed dentition determines an important period of occlusion development in childhood.
This study aimed to evaluate the aesthetic impact of the midline diastema cut-off point in mixed dentition.
A cross-sectional study was performed with 257 children aged 8-10 years in late mixed dentition, with midline diastema of 1-5 mm and normal maxillary overjet. Orthodontic Aesthetic Subjective Impact Score determined the aesthetic impact of the midline diastema. Four quartiles of diastema measurements and impact scores were considered as cut-off points. Receiver Operating Characteristic curves were constructed, and the distances representing the distances to the ideal point were calculated. The Yuden index determined the efficiency of measuring the diastema to assess the aesthetic impact. The Kruskal-Wallis test compared the groups of participants classified according to the diastema cut-off by the sample quartile regarding the impact score. The analyses were performed with a significance level of 5%.
There was no significant difference between the four groups of measurement quartiles of the diastema regarding the aesthetic impact (P > .05).
The perception of dental aesthetics in mixed dentition children was not affected by the midline diastema, regardless of the cut-off point.
混合牙列期决定了儿童咬合发育的重要时期。
本研究旨在评估混合牙列期中线间隙截断点对美观的影响。
横断面研究共纳入 257 名 8-10 岁处于混合牙列晚期、上颌前牙正常覆𬌗且中缝间隙为 1-5mm 的儿童。采用正畸美学主观影响评分评估中缝间隙的美观影响。将中缝间隙测量值和影响评分的四个四分位数作为截断点。构建受试者工作特征曲线，并计算代表与理想点的距离。用 Yuden 指数评估测量中缝间隙评估美观影响的效率。根据样本四分位数将参与者分为不同的中缝间隙组，采用 Kruskal-Wallis 检验比较各组的美学影响评分。分析的显著性水平为 5%。
中缝间隙的四个四分位测量组在美学影响方面无显著差异（P＞.05）。
混合牙列期儿童的牙齿美观感知不受中缝间隙的影响，与截断点无关。
