Department of Medicine and Surgery, School of Medicine, University of Insubria, Via G. Piatti 10, 21100 Varese, Italy.
Section of Orthodontics, Department of Neuroscience, Reproductive Sciences and Oral Sciences, University of Naples Federico II, Via Pansini, 5, 80131 Naples, Italy.
Medicina (Kaunas). 2020 Mar 5;56(3):112. doi: 10.3390/medicina56030112.
The aim of the present paper is to use low-dose computed tomography (CT) to evaluate the changes in the midpalatal suture density in patients treated with rapid maxillary expansion (RME) and slow maxillary expansion (SME). Thirty patients (mean age 10.2 ± 1.2 years) were retrospectively selected from the existing sample of a previous study. For each patient, a low-dose computed tomography examination was performed before appliance placement (T0) and at the end of retention (T1), seven months later. Using the collected images, the midpalatal suture density was evaluated in six regions of interest. No significant differences were found between the timepoints in the rapid maxillary expansion group. Three out of six regions of interest showed significant decreases between the timepoints in the slow maxillary expansion group. No significant differences were found in comparisons between the two groups. The midpalatal suture density showed no significant differences when rapid maxillary expansion groups were compared to slow maxillary expansion groups, suggesting that a similar rate of suture reorganization occurs despite different expansion protocols.
本研究旨在使用低剂量计算机断层扫描（CT）评估快速上颌扩张（RME）和慢速上颌扩张（SME）治疗患者的中隔缝密度变化。从先前研究的现有样本中回顾性选择了 30 名患者（平均年龄 10.2 ± 1.2 岁）。对于每位患者，在放置矫治器前（T0）和 7 个月后的保持期结束时（T1）进行低剂量 CT 检查。使用收集的图像，在 6 个感兴趣区域评估中隔缝密度。在快速上颌扩张组中，各时间点之间未发现显著差异。在慢速上颌扩张组中，有 3 个感兴趣区域的密度在两个时间点之间有显著下降。两组之间的比较未发现显著差异。尽管扩张方案不同，但快速上颌扩张组与慢速上颌扩张组之间的中隔缝密度无显著差异，提示缝组织的重组速度相似。
