Objective
The objective of this study was to evaluate the effects of nonsurgical rapid maxillary
expansion (RME) and surgically assisted RME (SARME) on palatal morphology and upper
arch dimensions using three-dimensional (3D) models in skeletally mature patients.
Study Design
Thirty-eight skeletally mature patients with a maxillary transverse deficiency were
divided into RME and SARME groups. Nineteen patients in the RME group (mean age, 19.16
± 2.25 years) were treated using a full-coverage bonded acrylic splint expander; 19
patients in the SARME group (mean age, 20.38 ± 3.36) were treated using the banded
palatal expansion appliance with hyrax screws. The 3D models were obtained before
and after expansion. The maxillary dental arch widths, maxillary first molar angulation,
palatal area, and palatal volume were calculated on the 3D models.
Results
All variables showed statistically significant changes after the retention period
(P < .001). The maxillary arch width between first premolars (P < .05), the palatal area (P < .01), and the palatal volume (P < .05) significantly increased in the SARME group compared to the RME group. The
maxillary first molar tipping in the RME group was significantly higher than that
in the SARME group (P < .01).
Conclusions
Although SARME has more positive effects in skeletally mature patients, nonsurgical
RME can be considered as an alternative by evaluating surgical risks, periodontal
status, and the need for skeletal expansion.
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Article info
Publication history
Published online: March 03, 2022
Accepted:
February 26,
2022
Received in revised form:
February 24,
2022
Received:
January 26,
2022
Identification
Copyright
© 2022 Elsevier Inc. All rights reserved.
