Dental arch response to Haas-type rapid maxillary expansion anchored to deciduous vs permanent molars: A multicentric randomized controlled trial

Ugolini, Alessandro; Cerruto, Carmen; Vece, Luca Di; Ghislanzoni, Luis Huanca; Sforza, Chiarella; Doldo, Tiziana; Silvestrini-Biavati, Armando; Caprioglio, Alberto

doi:10.2319/041114-269.1

Cited by 61 publications

(61 citation statements)

References 24 publications

(33 reference statements)

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“…Different treatment outcomes might be related to collateral function such as changes in the breathing pattern [27–29], different mandibular displacement [30, 31], and/or spontaneous dental changes in the lower arch [32], but these variables were not evaluated in the present study. The present study employed maxillary expander banded on the upper second primary molars [33, 34], and results should be limited to this appliance.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2017

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BackgroundThe aim of this study is to identify cephalometric pretreatment parameters for prediction of Class II improvement induced by rapid maxillary expansion.MethodsLateral cephalograms of 30 patients (mean age 8.3 ± 1.6 years old) showing Class II molar relationship and undergone to rapid maxillary expansion on the upper deciduous molars were traced before treatment, and molar relation changes were evaluated on dental casts before and after treatment. Overall treatment time lasted 10.2 ± 2 months. Good responders (18 subjects, 10 females and 8 males) showed improvement of at least 2.50 mm, and bad responders (12 subjects, 7 females and 5 males) showed no improvement, improvement less than 2.50 mm, or worsening of molar relationship after treatment. Student’s t test was used to assess significance of differences between groups, and discriminant analysis allowed identification of predictive pretreatment variables.ResultsArticular angle, superior gonial angle, and mandibular dimensions (Co-Gn, S-Ar, Ar-Go, Go-Me) showed significant differences in the comparison between groups. Mandibular length Co-Gn and superior gonial angle were selected as significant predictive variable for discrimination.ConclusionsPatients with smaller mandibular length and more acute superior gonial angle are expected to have more chances to improve molar Class II after rapid maxillary expansion.

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Section: Discussionmentioning

confidence: 99%

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

et al. 2017

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“…In order to avoid the abovementioned effects on the permanent supporting teeth, some authors proposed a modified expander anchored to deciduous teeth [13, 14]. Although deciduous teeth anchorage in RME therapy is becoming more popular among clinicians, there is a lack of investigations concerning the maxillary effects of these appliances [12–17] and a little recent scientific evidence of their impact on the nasal cavities [18–20]. In the last decades considerable advances in three-dimensional imaging techniques and related software were achieved, contributing to extend the possibilities in orthodontic diagnosis, treatment and follow-up [21–24].…”

Section: Introductionmentioning

confidence: 99%

Digital evaluation of nasal changes induced by rapid maxillary expansion with different anchorage and appliance design

et al. 2017

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BackgroundScientific evidence showed that rapid maxillary expansion (RME) affects naso-maxillary complex, increasing nasal width and volume. This study aimed to evaluate nasal changes induced by rapid maxillary expansion with different anchorage and appliance design by using low dose and cone beam computed tomography.MethodsA total of 44 patients (20 males, mean age 8y 8 m ± 1y 2 m; 24 females mean age 8y 2 m ± 1y 4 m) were included in the investigation and divided into three groups according to the appliance: Hyrax-type expander anchored to permanent teeth, modified Hyrax-type expander anchored to deciduous teeth, modified Haas-type expander anchored to deciduous teeth. Maxillary expansion was performed until overcorrection and the expander was passively kept in situ for 7 months at least. All patients had three-dimensional imaging before expansion (T0) and after the retention period (T1). Nasal floor width, nasal wall width, maxillary inter-molar width were measured by means of Mimics software. The paired sample t-test was employed to assess the significance of the differences between the time points; the analysis of variance test (ANOVA) was used to compare differences between groups.ResultsThe statistical analysis revealed significant differences between T0 and T1 for each recorded measurement in each group; no significant differences were found by comparing groups.ConclusionsRapid maxillary expansion produces a significant skeletal transverse expansion of nasal region in growing patients. No significant differences in nasal effects are expected when the appliance is anchored onto deciduous teeth, with or without the palatal acrylic coverage.

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“…33 Lack of a control group should be considered a limitation of the present study as well as the difficulty of standardizing CBCT acquisition, 34 such as repositioning of the tongue (due to dental changes 35 ) and the mandible 36 (as a result of the clinical procedure). Threshold-based segmentation of the airway may not be easy to standardize, although we believe that the present method errors are acceptable.…”

Section: Discussionmentioning

confidence: 98%

Airway compartments volume and oxygen saturation changes after rapid maxillary expansion: A longitudinal correlation study

Fastuca

Perinetti

Zecca

et al. 2015

The Angle Orthodontist

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Dental arch response to Haas-type rapid maxillary expansion anchored to deciduous vs permanent molars: A multicentric randomized controlled trial

Abstract: GrE showed reduced molar angulation increases at T1 and reduced molar angulation decreases at T2 when compared with Gr6. At T2, the net increase of the upper intercanine distance in GrE was still significant compared with Gr6, indicating a more stable expansion in the anterior area.

Cited by 61 publications

References 24 publications

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

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

Digital evaluation of nasal changes induced by rapid maxillary expansion with different anchorage and appliance design

Airway compartments volume and oxygen saturation changes after rapid maxillary expansion: A longitudinal correlation study

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