The aim of this study was to compare the dental effects, impact on quality of life, and pain perception of adolescents wearing Mini Hyrax and Hyrax expanders in rapid palatal expansion. Thirty-four adolescents aged 11 to 16 years, with maxillary transverse deficiency (unilateral or bilateral posterior crossbite), were randomly allocated into two groups, Mini Hyrax group and Hyrax group (1:1 ratio). Dental effects were evaluated by digitally superimposed pretreatment and postretention three-dimensional intraoral scans on the palatal rugaes using the software 3DSlicer. Impact on quality of life was assessed with the OHIP-14 questionnaire applied in the pretreatment, posttreatment and postretention. Visual analog scale was applied 24, 48, and 72 h and 7 days after the first activation of the expander. Thirty of the 34 adolescents recruited completed the study. There were no statistically significant differences in dentoalveolar effects between groups. OHIP-14 scores across time among Mini Hyrax wearers were similar to those of the Hyrax wearers. The inter-group comparisons showed no difference between groups with respect to the OHIP-14 scores in posttreatment and postretention (p > 0.05). There were no differences in pain perception between groups. Considering intra-group comparison, the reduction in pain perception among adolescents in the Mini Hyrax group was gradual. Among adolescents in the Hyrax group, a statistically significant reduction between 48 and 72 h was observed. There were no significant differences in dental effects, impact on quality of life and pain perception between adolescents wearing Mini Hyrax and Hyrax expanders in rapid palatal expansion.

中文翻译：

---

Mini Hyrax 与 Hyrax 扩张器在后反牙合青少年快速腭扩张中的比较：一项随机对照临床试验

本研究的目的是比较佩戴 Mini Hyrax 和 Hyrax 扩张器进行快速腭扩张的青少年的牙齿效果、对生活质量的影响以及疼痛感知。将34名11~16岁上颌骨横向缺损（单侧或双侧后牙反牙合）的青少年随机分为两组：迷你蹄兔组和蹄兔组（比例1:1）。使用软件 3DSlicer 对腭皱进行数字叠加预处理和固位后三维口内扫描来评估牙科效果。在治疗前、治疗后和保留后使用 OHIP-14 问卷评估对生活质量的影响。首次激活扩张器后 24、48、72 小时和 7 天应用视觉模拟量表。招募的 34 名青少年中有 30 名完成了这项研究。各组之间的牙槽效应没有统计学上的显着差异。Mini Hyrax 佩戴者随时间的 OHIP-14 得分与 Hyrax 佩戴者相似。组间比较显示，治疗后和保留后的 OHIP-14 评分在各组之间没有差异（p > 0.05）。各组之间的疼痛感知没有差异。考虑到组内比较，迷你蹄兔组青少年疼痛感知的减少是逐渐的。在 Hyrax 组的青少年中，在 48 至 72 小时之间观察到统计学上显着的减少。佩戴 Mini Hyrax 和 Hyrax 扩张器进行快速腭扩张的青少年在牙齿效果、生活质量影响和疼痛感知方面没有显着差异。