Post-Graduate Program of Translational Surgery at Federal University of São Paulo (UNIFESP), São Paulo, Brazil.
J Dent Res. 2013 Jul;92(7 Suppl):49S-54S. doi: 10.1177/0022034513486899. Epub 2013 May 20.
The aim of this study was to evaluate the orthodontic retention of maxillary skeletal stability after surgically assisted rapid palatal expansion (SARPE). Ninety digitized plaster casts from 30 adult patients who underwent SARPE were assessed. Thirty patients were divided equally into two groups: the No Retention Group (n = 15) and the Retention Group (n = 15) with a Transpalatal Arch [TPA]). After the end of expansion, the expander appliance was stabilized and remained in place for 4 months. The additional retention period began in the Retention Group as soon as the expander was removed and replaced by a TPA. During the same period, the No Retention Group remained without retention. The casts were created pre-operatively, at 4 months and 10 months post-expansion. The models were digitized by means of a 3D Vivid 9i laser scanner. The palatal area and volume were assessed. Both variables increased after 4 months compared with pre-operative values (p < .05). At 10 months, patients' palatal areas and volumes were stable in both groups (p > .05). In conclusion, no retention other than the expander appliance is needed after SARPE.
本研究旨在评估手术辅助快速腭扩张（SARPE）后上颌骨骨骼稳定性的正畸保持效果。评估了 30 名接受 SARPE 的成年患者的 90 个数字化石膏模型。30 名患者平均分为两组：无保持组（n = 15）和保持组（n = 15），采用腭弓（TPA）。扩张结束后，扩张器稳定并保持在位 4 个月。保持期从扩张器拆除并更换为 TPA 开始，保持组立即开始。在此期间，无保持组没有保持。术前、扩张后 4 个月和 10 个月制作了石膏模型。通过 3D Vivid 9i 激光扫描仪对模型进行数字化。评估腭区和腭容量。与术前值相比，4 个月后两个变量均增加（p <.05）。10 个月时，两组患者的腭区和腭容量均稳定（p >.05）。结论：SARPE 后除扩张器外，无需其他保持。
