Prediction of Class II improvement after rapid maxillary expansion in early mixed dentition

Caprioglio, Alberto; Bergamini, Chiara; Franchi, Lorenzo; Vercellini, Nicolò; Zecca, Piero Antonio; Nucera, Riccardo; Fastuca, Rosamaria

doi:10.1186/s40510-017-0163-3

Cited by 35 publications

(24 citation statements)

References 27 publications

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“…These outcomes also reflect in the age of major prevalence (from 10 to 12) reported by the orthodontists in relation to the patients in treatment for Class II malocclusions. Also in accordance with the literature (Kopecky and Fishman 1993, Caprioglio et al 2017, Pontes et al 2017, 69.7% of the orthodontists indicated that most of the patients in the search for treatment were females. Probably, the high prevalence rate of females is explained on the fact that women concern more about health (Spalj et al 2017).…”

Section: Discussionsupporting

confidence: 58%

Perception, knowledge and attitudes of Brazilian orthodontists on the treatment of Class II malocclusions

Kaieda¹,

Lima

Scanavini

et al. 2017

An. Acad. Bras. Ciênc.

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The present study aimed to assess the perception and knowledge of Brazilian orthodontists on the ideal moment to treat Class II malocclusions. Questionnaires with open, semi-open and close questions were sent by e-mail to 1653 Brazilian orthodontists. These orthodontists were registered in the Brazilian Association of Orthodontics and Dentofacial Orthopedics (ABOR). One-hundred and three (9.86%) Orthodontists replied to the questionnaires. Most of them were males (60.5%) with specialization as the highest level of professional qualification (59.9%). Most of the orthodontists (51%) reported preference for treating Class II malocclusions in late mixed dentition, followed by the early mixed dentition (29%). The age range between 10 and 12 years old figured as the most prevalent in patients searching for treatment (42.7%). Most of the patients searching for treatment were females (69.7%). Preferences for functional orthopedic appliances were reported by 35% of the orthodontists. Brazilian orthodontists revealed a trend for treating patients with Class II malocclusions in the late mixed dentition. Female patients aged from 10 to 12 years old represented the majority of patients that search for orthodontic treatment. Functional orthopedic appliances were preferred by Brazilian orthodontists for treating Class II malocclusions.

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Section: Discussionsupporting

confidence: 58%

Perception, knowledge and attitudes of Brazilian orthodontists on the treatment of Class II malocclusions

Kaieda¹,

Lima

Scanavini

et al. 2017

An. Acad. Bras. Ciênc.

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“…Class II malocclusions are commonly observed in orthodontic patients [ 1 ]. During treatment planning among the several dento-skeletal pattern combinations of class II malocclusion, it is important to consider the maxillary transverse deficiency, which is often overlooked [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Mandibular response after rapid maxillary expansion in class II growing patients: a pilot randomized controlled trial

et al. 2017

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BackgroundThe aim of this pilot randomized controlled trial (RCT) was to evaluate the sagittal mandibular response induced by rapid maxillary expansion (RME) therapy in mixed dentition patients with class II malocclusion, comparing the effects of bonded RME and banded RME with a matched untreated class II control group.MethodsThis RCT was designed in parallel with an allocation ratio of 1:1:1. The sample consisted of 30 children with a mean age of 8.1 ± 0.6 years who were randomly assigned to three groups: group 1 treated with bonded RME, group 2 treated with banded RME, and group 3 the untreated control group. All patients met the following inclusion criteria: early mixed dentition, class II molar relationship, transverse discrepancy ≥ 4 mm, overjet ≥ 5 mm, and prepubertal skeletal maturity stage (CS1–CS2). The expansion screw was activated one quarter of a turn per day (0.25 mm) until overcorrection was reached. For each subject, lateral cephalograms and plaster casts were obtained before treatment (T1) and after 1 year (T2). A randomization list was created for the group assignment, with an allocation ratio of 1:1:1. The observer who performed all the measurements was blinded to group assignment. The study was single-blinded in regard to statistical analysis.ResultsRME was effective in the correction of maxillary deficiency. Class II patients treated with both types of RME showed no significant improvement of the anteroposterior relationship of the maxilla and the mandible at both skeletal and occlusal levels. The acrylic splint RME had significant effects on reducing the skeletal vertical dimension and the gonial angle.ConclusionsThe orthopedic expansion did not affect the sagittal relationship of class II patients treated in the early mixed dentition when compared with the untreated control group. Additional studies with a larger sample are warranted to elucidate individual variations in dento-skeletal mandibular response to the maxillary expansion protocol in class-II-growing patients.Trial registration ClinicalTrials.gov NCT03159962.

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“…Slow protocols of expansion showed no significant differences in the skeletal rate of palatal expansion and stability in long-term follow-up, when compared to RME [33], and, according to the results of the present study, no significant differences on the midpalatal suture density. Moreover, a slower expansion rate would prevent the accumulation of large residual forces within the maxillary complex, which may result in the decrease in undesirable concomitant changes in the craniofacial sutures observed during RME [34] which can affect the whole cranio-facial region [35][36][37]. Rapid palatal expansion is also beneficial in cases of class II malocclusion related to a mandibular posterior position induced by a reduced transversal dimension of the maxillary bone [38].…”

Section: Discussionmentioning

confidence: 99%

Midpalatal Suture Density Evaluation after Rapid and Slow Maxillary Expansion with a Low-Dose CT Protocol: A Retrospective Study

et al. 2020

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Background and objectives: The aim of the present paper is to use low-dose computed tomography (CT) to evaluate the changes in the midpalatal suture density in patients treated with rapid maxillary expansion (RME) and slow maxillary expansion (SME). Materials and Methods: Thirty patients (mean age 10.2 ± 1.2 years) were retrospectively selected from the existing sample of a previous study. For each patient, a low-dose computed tomography examination was performed before appliance placement (T0) and at the end of retention (T1), seven months later. Using the collected images, the midpalatal suture density was evaluated in six regions of interest. Results: No significant differences were found between the timepoints in the rapid maxillary expansion group. Three out of six regions of interest showed significant decreases between the timepoints in the slow maxillary expansion group. No significant differences were found in comparisons between the two groups. Conclusions: The midpalatal suture density showed no significant differences when rapid maxillary expansion groups were compared to slow maxillary expansion groups, suggesting that a similar rate of suture reorganization occurs despite different expansion protocols.

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Prediction of Class II improvement after rapid maxillary expansion in early mixed dentition

Cited by 35 publications

References 27 publications

Perception, knowledge and attitudes of Brazilian orthodontists on the treatment of Class II malocclusions

Perception, knowledge and attitudes of Brazilian orthodontists on the treatment of Class II malocclusions

Mandibular response after rapid maxillary expansion in class II growing patients: a pilot randomized controlled trial

Midpalatal Suture Density Evaluation after Rapid and Slow Maxillary Expansion with a Low-Dose CT Protocol: A Retrospective Study

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