Three-Dimensional Evaluation of Slow Maxillary Expansion with Leaf Expander vs. Rapid Maxillary Expansion in a Sample of Growing Patients: Direct Effects on Maxillary Arch and Spontaneous Mandibular Response

Applied Sciences

卷:10

Alessandro Ugolini¹  Valentina Lanteri²  Cinzia Maspero²  Marco Farronato²  Gianguido Cossellu²  Alessandro Gianolio³  Matteo Beretta⁴ 

[1] Department of Sciences Integrated Surgical and Diagnostic, University of Genova, 16100 Genova, Italy;

[2] Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, 20100 Milan, Italy;

[3] Private Practice, 12042 Bra (CN), Italy;

[4] Private Practice, 15033 Casale Monferrato (AL), Italy;

关键词: maxillary expansion;    palatal expansion;    crossbite;    digital dentistry;    digital orthodontics;    3D imaging;   

DOI  :  10.3390/app10134512

来源: DOAJ

【 摘 要 】

The aim is to evaluate the effects of slow maxillary expansion on maxillary and mandibular arch, using a slow maxillary expander (SME-Leaf Expander) banded on primary second molar. Ninety patients with transverse maxillary deficiency and posterior crossbite were selected. Sixty-nine patients (33 males/36 females; 7.6 ± 1.7 years old) who underwent SME and 21 patients (10 males/11 females; 7.4 ± 1.2 years old) who were treated with rapid maxillary expander (RME). Digital models obtained pre- and post-treatment at appliance removal (9 to 11 months) were processed by means of a 3D scanner (Trios 3, 3Shape D250 laser, Copenhagen, Denmark). Interdental width in both maxilla and mandible were measured with 3 SHAPE Ortho Analyzer. Four Maxillary and four mandibular interdental width were traced and evaluated. The adequate Student’s t-test (dependent or independent) was used to compare intra and intergroups interdental width differences (p < 0.05). The efficacy of the SME was confirmed both on maxillary and mandibular arch. All the maxillary and mandibular interdental widths increased significantly (p < 0.001). The comparison with the RME group showed significant statistical differences between the two treatments with a greater increase in primary first and second intermolar and canine width for the test group (p < 0.001). SME with Leaf Expander produced statistically significant effects for the correction of transverse maxillary deficiencies with a significant indirect effect on the mandibular arch.

【 授权许可】

Unknown