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Dentoskeletal effects of mini-screw assisted, non-surgical palatal expansion in adults using a modified force-controlled polycyclic protocol: a single-centre retrospective study.
- Source :
- European Journal of Orthodontics; Apr2024, Vol. 46 Issue 2, p1-10, 10p
- Publication Year :
- 2024
-
Abstract
- Objectives This study assessed the dental and skeletal effects of pure bone-borne, non-surgical maxillary expansion, using a modified force-controlled polycyclic protocol. Methods Records of 17 adult patients, mean age 24.1 years; range 18–39 years, who had undergone maxillary expansion using a bone-borne Quad-expander (with 4 mini-screws), were analysed. In all patients, 0.17 mm/day of expansion was completed for 1 week, followed by a cyclic protocol of expansion of forward and backward turns until the force needed to turn the expander was below 400 cN, assessed weekly. After this, expansion continued at a rate of 0.17 mm/day until the desired amount of expansion was achieved. Cone beam computer tomography scans were taken pre- and post-expansion. Results The mid-palatal suture was successfully opened in 100% of patients included in this study. Axially, the amount of skeletal opening at the posterior nasal spine was 61% of the anterior nasal spine. Expansion was pyramidal in the coronal plane. Significant increases at the dental and skeletal levels were achieved, with changes at the skeletal level reaching 73%. The alveolar bone angle increased more than the angular changes at the molars and premolars. Limitations This is a retrospective study with short-term results. Conclusion The Quad-expander, with a force-controlled polycyclic expansion protocol, effectively produced a significant increase in maxillary width in skeletally mature subjects in the short term. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01415387
- Volume :
- 46
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- European Journal of Orthodontics
- Publication Type :
- Academic Journal
- Accession number :
- 176761055
- Full Text :
- https://doi.org/10.1093/ejo/cjad080