Dimensional changes of dental arches produced by fixed and removable palatal cribs: A prospective, randomized, controlled study.

Abstract

OBJECTIVE:

To evaluate the dimensional changes of dental arches on digital models of open bite treatment with fixed and removable palatal cribs.

MATERIALS AND METHODS:

The sample comprised 41 patients of both sexes who were white, aged 7-10 years, and who had mixed dentition, Angle Class I molar relationship, and a negative overbite of at least 1 mm. The sample was randomly divided into two groups: G1, fixed palatal crib; and G2, removable palatal crib. Cast models, obtained initially (T1) and after 1 year of treatment (T2), were scanned by a three-dimensional (3D) scanner, 3Shape R700, producing a 3D image. Measurements were performed by a calibrated examiner using OrthoAnalyzer™ 3D software.

RESULTS:

At T2-T1, differences were observed between the groups regarding vertical dentoalveolar development and overjet. There was more mandibular incisor extrusion for G1 (-1.66 mm) than for G2 (-0.54 mm). An overjet increase was observed in G1 (0.56 mm), in contrast to a reduction in G2 (-0.40 mm). There was a similar overbite increase for both groups (3.51 mm for fixed palatal crib and 3.88 mm for removable palatal crib).

CONCLUSIONS:

Both the treatment protocols are similarly effective for anterior open bite correction, providing an overbite increase with dentoalveolar arch changes, especially in the anterior region.

• Authors: Thiago Slaviero, Thais Maria Freire Fernandes, Paula Vanessa Pedron Oltramari-Navarro, Ana Claudia de Castro, Ferreira Conti, Marcelo Lupion Poleti, Marcio Rodrigues de Almeida
• Journal: The Angle orthodontist (Angle Orthod) Vol. 87 Issue 2 Pg. 215-222 (Mar 2017) ISSN: 1945-7103 [Electronic] United States
• PMID: 27598906 (Publication Type: Journal Article, Randomized Controlled Trial)

Topics

• Child
• Dental Arch (anatomy & histology)
• Female
• Humans
• Imaging, Three-Dimensional
• Male
• Malocclusion, Angle Class I (therapy)
• Maxillofacial Development
• Models, Dental
• Open Bite (therapy)
• Orthodontic Appliances
• Orthodontics, Corrective (methods)
• Prospective Studies
• Software
• Treatment Outcome