Stability of Surgically Assisted Rapid Palatal Expansion: A Randomized Trial

Stability of Surgically Assisted Rapid Palatal Expansion: A Randomized Trial

Author Ribeiro Prado, G. P. Autor UNIFESP Google Scholar
Pereira, M. D. Autor UNIFESP Google Scholar
Rocha Bilo, J. P. Autor UNIFESP Google Scholar
Furtado, F. Autor UNIFESP Google Scholar
Ferreira, L. M. Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract 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 (, NCT01770782).
Keywords maxillary expansion
dental casting technique
orthodontic appliances
computer-assisted image analysis
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 10/52179-6
Date 2013-07-01
Published in Journal of Dental Research. Thousand Oaks: Sage Publications Inc, v. 92, n. S7, p. S49-S54, 2013.
ISSN 0022-0345 (Sherpa/Romeo, impact factor)
Publisher Sage Publications Inc
Extent S49-S54
Access rights Closed access
Type Article
Web of Science ID WOS:000329542300008

Show full item record


File Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)




My Account