Pascoal Selma, Pinho Teresa
Instituto Universitário de Ciências da Saúde, CESPU, Instituto de Investigacão e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central de Gandra, 1317, 4585-116 Gandra PRD, Portugal.
Instituto Universitário de Ciências da Saúde, CESPU, Instituto de Investigacão e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central de Gandra, 1317, 4585-116 Gandra PRD, Portugal; IBMC (Inst. Biologia Molecular e Celular), i3S (Inst. Inovação e Investigação em Saúde), Universidade do Porto, Porto, Portugal.
Int Orthod. 2016 Dec;14(4):476-490. doi: 10.1016/j.ortho.2016.10.001. Epub 2016 Nov 8.
The objective of this study was to compare the dimensional changes in the alveolar ridge before, at the end of, and one year after orthodontic treatment in cases of Maxillary Lateral Incisor Agenesis and the possibility of using plaster models and panoramic radiographs as substitutes for cone beam-computed tomography.
A total of 228 measurements were performed on plaster models and panoramic radiographs: before (T1), at the end of (T2), and 1 year after orthodontic treatment (T3). At stage T2, the cone beam-computed tomography was also analyzed. Non-parametric tests were used.
In all 3 stages, there was no statistically significant difference regarding the thickness of the models, the height of the bone in the panoramic radiographs, the space opening and the height of the bone in the panoramic radiographs, or the space opening in the models and the thickness in the same plaster models. However, a statistically significant difference was observed for the width in the panoramic radiograph during all 3 stages. Cone beam-computed tomography did not reveal a statistically significant correlation regarding the height and width of the bone compared with the panoramic radiographs, and the thickness as compared with plaster models.
There was no significant variation in thickness, height and width of the bone over time. It was demonstrated that plaster models and panoramic radiographs do not appear to be good substitutes for cone beam-computed tomography for these specific measurements.
本研究的目的是比较上颌侧切牙先天缺失病例在正畸治疗前、治疗结束时和治疗后一年牙槽嵴的尺寸变化，以及使用石膏模型和全景X线片替代锥形束计算机断层扫描的可能性。
对石膏模型和全景X线片进行了总共228次测量：正畸治疗前（T1）、治疗结束时（T2）和治疗后1年（T3）。在T2阶段，还分析了锥形束计算机断层扫描。使用了非参数检验。
在所有三个阶段，模型厚度、全景X线片中骨高度、模型中的间隙开口以及全景X线片中骨高度或模型中的间隙开口与同一石膏模型中的厚度之间均无统计学显著差异。然而，在所有三个阶段的全景X线片中宽度存在统计学显著差异。与全景X线片相比，锥形束计算机断层扫描未显示骨高度和宽度与石膏模型相比厚度之间存在统计学显著相关性。
随着时间的推移，骨的厚度、高度和宽度没有显著变化。结果表明，对于这些特定测量，石膏模型和全景X线片似乎不是锥形束计算机断层扫描的良好替代品。
