Evaluation of the midpalatal suture during rapid palatal expansion in children: a CT study

Filho, Omar Gabriel da Silva; Lara, Túlio Silva; Almeida, Arací Malagodi de; Silva, Helena Cristina da

doi:10.17796/jcpd.29.3.kvu17822u2056508

Cited by 36 publications

(13 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The anterior screw of the EDO was opened approximately 9 mm, causing a 60% orthopedic effect on the anterior region of the midpalatal suture (5.38 mm). The pattern of midpalatal suture opening observed for the EDO was similar to those described in previous studies with conventional RME expanders, 9,29 showing a triangular shape, as shown in Figure 1. Additionally, bone-tooth-borne expanders seem to produce a similar orthopedic effect compared with conventional Hyrax expanders.…”

Section: Main Findings In the Context Of The Existing Evidence And Insupporting

confidence: 86%

“…maxillary widths and the arch perimeter with a parallel-opening screw, centrally positioned in the palate. [6][7][8][9] Alternatively, the fan-type expander concentrates changes in the anterior region of the dental arch with negligible changes in the molar region. 10,11 Approximately one third of patients with maxillary constriction have a greater transversal deficiency in the intercanine width than the intermolar width.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Maxillary expander with differential opening vs Hyrax expander: A randomized clinical trial

Alves

Janson

McNamara

et al. 2020

American Journal of Orthodontics and Dentofacial Orthopedics

View full text Add to dashboard Cite

The aim of this 2-arm parallel trial was to compare the dentoskeletal effects of the expander with differential opening (EDO) and the Hyrax expander in the mixed dentition. Methods: Patients aged 7-11 years with maxillary dental arch constriction and Class I or Class II sagittal relationships were randomly allocated into 2 study groups. The experimental group comprised 22 patients (10 males, 12 females) with a mean age of 8.46 years treated with the EDO. The comparison group was composed of 24 patients (6 males, 18 females), mean age of 8.92 years treated with the conventional Hyrax expander. One complete turn per day for 6 days was performed for the posterior screw of the EDO and for the Hyrax expander. The anterior screw of the EDO was activated 1 complete turn per day for 10 days. The primary outcomes were the anterior opening of the midpalatal suture, changes on the interincisal diastema width, maxillary dental arch widths, arch perimeter, arch length, palatal depth, inclination of maxillary posterior teeth and on dental arch shape, and the amount of differential expansion in the anterior region compared with the posterior region of the maxillary dental arch. Computer-generated randomization was used. Allocation was concealed with sequentially, numbered, sealed, and opaque envelopes. Blinding was applicable for outcome assessment only. Occlusal radiographs of the maxilla were obtained at the end of the active expansion phase (T2). Intraoral photographs were obtained immediately pre-expansion (T1) and at T2. Digital dental models were obtained at T1 and 6 months after the active expansion period (T3). Intergroup comparisons of T1-T2 changes were performed using multiple linear regression analysis (P \ 0.05). The independent variables were both treatment and the starting forms. Bonferroni correction for multiple tests was applied. Results: The experimental group showed a significantly greater opening of the anterior region of the midpalatal suture, a greater increase of the interincisal diastema width, and greater increases of the intercanine distance and inter-first deciduous molar distance than the Hyrax expander. The experimental group showed a significant differential expansion between the anterior and posterior regions, whereas the Hyrax group produced a similar expansion in the canine and molar regions. Serious harm was not observed. Conclusions: The EDO was capable of promoting greater orthopedic and dental changes in the anterior region of the maxilla than the conventional Hyrax expander. Similarity between the 2 expanders was observed for changes in the posterior region width, arch perimeter, arch length, palatal depth, and posterior teeth inclination.

show abstract

Section: Main Findings In the Context Of The Existing Evidence And Insupporting

confidence: 86%

mentioning

confidence: 99%

Maxillary expander with differential opening vs Hyrax expander: A randomized clinical trial

Alves

Janson

McNamara

et al. 2020

American Journal of Orthodontics and Dentofacial Orthopedics

View full text Add to dashboard Cite

show abstract

“…These values of suture expansion were similar to those found by some authors and different from others. 27,39,40 The differences could be mainly explained by different methods of investigation, times of examination after removing the appliances, and the age groups of the patients in each study.…”

Section: Discussionmentioning

confidence: 99%

Effects of rapid maxillary expansion on the cranial and circummaxillary sutures

Ghoneima

Abdel-Fattah

Hartsfield

et al. 2011

American Journal of Orthodontics and Dentofacial Orthopedics

134

View full text Add to dashboard Cite

Introduction The aim of this study was to determine whether the orthopedic forces of rapid maxillary expansion cause significant quantitative changes in the cranial and the circummaxillary sutures. Methods Twenty patients (mean age, 12.3 ± 1.9 years) who required rapid maxillary expansion as a part of their comprehensive orthodontic treatment had preexpansion and postexpansion computed tomography scans. Ten cranial and circummaxillary sutures were located and measured on one of the axial, coronal, or sagittal sections of each patient’s preexpansion and postexpansion computed tomography scans. Quantitative variables between the 2 measurements were compared by using the Wilcoxon signed rank test. A P value less than 0.05 was considered statistically significant. Results Rapid maxillary expansion produced significant width increases in the intermaxillary, internasal, maxillonasal, frontomaxillary, and frontonasal sutures, whereas the frontozygomatic, zygomaticomaxillary, zygomaticotemporal, and pterygomaxillary sutures showed nonsignificant changes. The greatest increase in width was recorded for the intermaxillary suture (1.7 ± 0.9 mm), followed by the internasal suture (0.6 ± 0.3 mm), and the maxillonasal suture (0.4 ± 0.2 mm). The midpalatal suture showed the greatest increase in width at the central incisor level (1.6 ± 0.8 mm) followed by the increases in width at the canine level (1.5 ± 0.8 mm) and the first molar level (1.2 ± 0.6 mm). Conclusions Forces elicited by rapid maxillary expansion affect primarily the anterior sutures (intermaxillary and maxillary frontal nasal interfaces) compared with the posterior (zygomatic interface) craniofacial structures.

show abstract

“…[ 9 ] The drawbacks of 2D cephalometry are distortion and magnification with poor reproducibility of landmark identification. [ 10 11 12 13 ] In order to avoid the inherit hitches of the 2D methods, 3D imaging based on computed tomography (CT) and cone-beam computed tomographic (CBCT) data were advocated;[ 14 15 16 17 18 19 20 21 ] however, there are certain limitations such as high cost, radiation dose, and artifacts created by metal objects. [ 22 23 ]…”

Section: Introductionmentioning

confidence: 99%

Assessing the validity of ITK-SNAP software package in measuring the volume of upper airway spaces secondary to rapid maxillary expansion

Almuzian

Ghatam²,

Al-Muzian

2018

J Orthodont Sci

View full text Add to dashboard Cite

INTRODUCTION:The purpose of this study is to evaluate the validity of a free-access software package (ITK-SNAP) in segmenting and measuring the volume of upper airway spaces secondary to rapid maxillary expansion (RME).MATERIALS AND METHODS:Sixteen participants who required RME were recruited for this study. Preoperative (T1) and 6-month postoperative (T2) cone-beam computed tomographic scans of all participants were analyzed. OnDemand3D software packages was used for superimposition and orientation of the images, while ITK-SNAP software was used to measure the volume of airway spaces. At week one (W1), all volumetric measurements were carried out by one examiner and repeated after 1 week (W2). Paired t-test, the interclass correlation coefficient, and Dahlberg coefficients of reliability were used to assess the reproducibility.RESULTS:Student's t-test showed no significant difference between the W1 and W2 set of measurements (P > 0.05). Coefficients of reliability were above 95% and intraclass correlation coefficient ranged from 0.99 to 1.000, which altogether confirmed the satisfactory reproducibility of the measurements.CONCLUSIONS:ITK-SNAP software package is a reliable and cost-effective method to segment and measure upper airway changes subsequent to RME.

show abstract

Evaluation of the midpalatal suture during rapid palatal expansion in children: a CT study

Cited by 36 publications

References 16 publications

Maxillary expander with differential opening vs Hyrax expander: A randomized clinical trial

Maxillary expander with differential opening vs Hyrax expander: A randomized clinical trial

Effects of rapid maxillary expansion on the cranial and circummaxillary sutures

Assessing the validity of ITK-SNAP software package in measuring the volume of upper airway spaces secondary to rapid maxillary expansion

Contact Info

Product

Resources

About