scholarly journals Comparison of dimensions and volume of upper airway before and after mini-implant assisted rapid maxillary expansion

2020 ◽  
Vol 90 (3) ◽  
pp. 432-441 ◽  
Author(s):  
Qiming Li ◽  
Hongyi Tang ◽  
Xueye Liu ◽  
Qing Luo ◽  
Zhe Jiang ◽  
...  
Keyword(s):  
Nasal Cavity ◽  
Upper Airway ◽  
Rapid Maxillary Expansion ◽  
Cone Beam ◽  
Complex Structures ◽  
Direct Relation ◽  
Maxillary Expansion ◽  
Before And After ◽  
Skeletal Pattern ◽  
Skeletal Expansion

ABSTRACT Objectives To evaluate changes in dimensions and volume of upper airway before and after mini-implant assisted rapid maxillary expansion (MARME) and observe correlations between changes of upper airway and vertical skeletal pattern in young adults. Materials and Methods In this retrospective study, 22 patients (mean age, 22.6 ± 4.5 years; 4 male 18 female) with transverse discrepancy underwent MARME. Cone beam computed tomography was taken before and 3 months after expansion. Vertical and horizontal dimensions and volume of the nasal cavity, nasopharyngeal, retropalatal, retroglossal and hypopharyngeal airway were compared before and after MARME. Correlations between changed volume and dimensions were explored, as well as the vertical skeletal pattern. Results Nasal osseous width, maxillary width, volume of the nasal cavity and nasopharynx increased significantly (P < .05). Enlarged nasopharyngeal volume correlated with increased nasal width at the PNS plane (P < .05). There were no correlations between expanded volume and maxillary width. No measurements except nasal cavity volume had a correlation with Sum angle. Increased maxillary width correlated negatively with hard palate thickness (P < .05). Conclusions (1) MARME caused an increase in volume of the nasal cavity and nasopharynx, with expansion of nasal osseous width and maxillary width. (2) Enlarged nasal width at the PNS plane contributed to the increase in nasopharynx volume. Enlarged maxillary width showed no direct relation with increased volume. (3) In this study, it was unclear about the association between changes of the upper airway and vertical skeletal pattern because of complex structures. (4) Palate thickness affected skeletal expansion of the maxilla in MARME.

scholarly journals Upper airway expansion after rapid maxillary expansion evaluated with cone beam computed tomography

2012 ◽  
Vol 82 (3) ◽  
pp. 458-463 ◽  
Author(s):  
Annelise Nazareth Cunha Ribeiro ◽  
João Batista de Paiva ◽  
José Rino-Neto ◽  
Edson Illipronti-Filho ◽  
Tarcila Trivino ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Upper Airway ◽  
Rapid Maxillary Expansion ◽  
Cone Beam ◽  
Maxillary Expansion

scholarly journals Evaluation of transverse maxillary growth on cone-beam computed tomography images

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Brandon J. Seubert ◽  
Laurence Gaalaas ◽  
Brent E. Larson ◽  
Thorsten Grünheid
Keyword(s):  
Computed Tomography ◽  
Nasal Cavity ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Long Term Effects ◽  
Maxillary Expansion ◽  
Computed Tomography Images ◽  
Before And After ◽  
Annual Changes ◽  
Lateral Walls

AbstractThis study aimed at quantifying the annual transverse growth of the maxilla using skeletal landmarks in three different regions on cone-beam computed tomography (CBCT) scans. CBCT scans taken before and after orthodontic treatment of 100 child and adolescent patients (50 male, 50 female) without maxillary transverse deficiencies were used to determine the transverse linear distances between the greater palatine foramina (GPFd), the lateral walls of the nasal cavity (NCd), and the infraorbital foramina (IOFd). We found that all distances increased significantly with growth in both genders (p < 0.001). The overall average annual change was 0.5 mm for GPFd, 0.3 mm for NCd, and 0.7 mm for IOFd. Males generally had greater annual changes than females for GPFd and IOFd, but not NCd. There were weak, statistically not significant (p > 0.05) correlations between patient age and the annual changes in GPFd, NCd, and IOFd. These results suggest that the positions of the greater palatine foramina, the lateral walls of the nasal cavity, and the infraorbital foramina change consistently with maxillary transverse growth. Clinicians can use the growth rates as population averages to more confidently estimate the amount of skeletal transverse deficiency or evaluate the long-term effects of maxillary expansion treatment.

scholarly journals Rapid Maxillary Expansion and Upper Airway Morphology: A Systematic Review on the Role of Cone Beam Computed Tomography

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Gabriele Di Carlo ◽  
Matteo Saccucci ◽  
Gaetano Ierardo ◽  
Valeria Luzzi ◽  
Francesca Occasi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Randomized Clinical Trials ◽  
Upper Airway ◽  
Rapid Maxillary Expansion ◽  
Cone Beam ◽  
Cochrane Library ◽  
Maxillary Expansion ◽  
Screening Process ◽  
Airway Morphology

Objective. This study aimed to investigate the quality of cone beam computed tomography (CBCT) studies evaluating the effects of rapid maxillary expansion on upper airway morphology. Materials and Methods. A database search was conducted using PubMed, Ovid, and Cochrane Library up to December 2016. Studies in which CBCT was adopted to visualize the upper airway before and after rapid maxillary expansion were included. The population target was growing patients. Methodological quality assessment was performed. Results. The screening process resulted in the exclusion of 1079 references, resulting in only 9 remaining papers that fulfilled the inclusion criteria. No randomized clinical trials were found. The quality scores ranged from 36% to 68% of the maximum achievable, and the mean quality score of the studies was 50%. No good quality studies were detected in our sample. Conclusions. Inconsistencies in the CBCT protocols utilized were detected between studies. Head posture, tongue position, and segmentation protocols were not consistent. These discrepancies were reflected in the different results obtained in the studies. A valid and consistent protocol with regard to head and tongue positioning, as well as nasal cavity volume segmentation, is required.

scholarly journals CBCT of skeletal changes following rapid maxillary expansion to increase arch-length with a development-dependent bonded or banded appliance

2013 ◽  
Vol 83 (5) ◽  
pp. 851-857 ◽  
Author(s):  
Ryuzo Kanomi ◽  
Toru Deguchi ◽  
Eriko Kakuno ◽  
Teruko Takano-Yamamoto ◽  
W. Eugene Roberts
Keyword(s):  
Three Dimensional ◽  
Pediatric Dentistry ◽  
Rapid Maxillary Expansion ◽  
Cone Beam ◽  
Older Children ◽  
Maxillary Expansion ◽  
Skeletal Changes ◽  
Skeletal Effects ◽  
3D Evaluation ◽  
Skeletal Expansion

ABSTRACT Objective: To assess the three-dimensional (3D) skeletal response to a standardized 5 mm of rapid maxillary expansion (RME) in growing children (6–15 years) with maxillary width deficiency and crowding. Materials and Methods: A bonded appliance was used prior to the eruption of the maxillary first premolars (Mx4s), and a banded appliance was used thereafter. A consecutive sample of 89 patients (29 boys and 60 girls) from a large pediatric dentistry and orthodontics practice was divided into four groups: 1) 6–8 years old (n  =  26), 2) 9–11 years old with unerupted Mx4s (n  =  21), 3) 9–11 years with erupted Mx4s (n  =  23), and 4) 12–15 years (n  =  19). For all patients, the 3D evaluation of dental and skeletal effects was performed with cone-beam computed tomography (CBCT). Results: For both appliances in all patients, CBCT confirmed a triangular pattern of expansion in both the frontal and sagittal planes. Overall, both appliances produced significant maxillary expansion (&gt;80% of the 5-mm activation), but older children showed a progressively more dental (less skeletal) response. Comparison of the two types of expanders in the crossover sample, children aged 9–11 years, showed that the bonded RME produced the most efficient skeletal expansion in the preadolescent sample. Increased maxillary width at the level of the zygomaticomaxillary suture was the best indicator for development of maxillary arch circumference. Conclusion: Development-dependent appliances (bonded RPE before Mx4s erupt, and a banded device thereafter) provided optimal RME treatment for all children from age 6–15 years.

scholarly journals Effects of rapid maxillary expansion on nasal cavity dimensions and airway resistance

2015 ◽  
Vol 2 ◽  
pp. 31-39
Author(s):  
Maria E. Tapia ◽  
Ursula Brethauer ◽  
Patricio Ulloa ◽  
Andrea Carcamo ◽  
Felipe Culaciati
Keyword(s):  
Ct Scan ◽  
Nasal Cavity ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Bite Block ◽  
Oral Breathing ◽  
Palatal Expansion ◽  
Before And After ◽  
The Right ◽  
Active Anterior Rhinomanometry

Background: Rapid maxillary expansion is a common treatment for posterior cross-bites that has also shown to improve nasal breathing.Methods: Thirteen oral breather patients with posterior cross-bite were studied. Treatment consisted in rapid maxillary expansion with a fully bonded appliance including a bite-block and a hyrax expansion screw. Before and after treatment, CT scans and active anterior rhinomanometry were performed to each patient. Data was analyzed with the non-parametric Wilcoxon statistical test and correlation between palatal expansion and increase of airflow in each patient was assessed.Results: The CT scan showed that transversal dimensions were significantly increased (P<0.001) in most areas after treatment, considering the right and left side separately. Rhinomanometry also showed statistical differences (P<0.001) in all parameters studied when compared before and after treatment. Positive correlation was observed between palatal expansion and increase of airflow.Conclusions: All patients improved oral breathing habit clinically and there is also statistical evidence that the nasal cavity increased its transversal dimensions, measured by CT scan and that patients increased their airflow through the nasal cavity, measured by rhinomanometry.

scholarly journals Short-term skeletal and dentoalveolar effects of overexpansion:

2021 ◽  
Author(s):  
Arun K. Bala ◽  
Phillip M. Campbell ◽  
Larry P. Tadlock ◽  
Emet D. Schneiderman ◽  
Peter H. Buschang
Keyword(s):  
Nasal Cavity ◽  
Skeletal Maturity ◽  
Controlled Trial ◽  
Rapid Maxillary Expansion ◽  
Skeletal Maturation ◽  
Control Group ◽  
Maxillary Expansion ◽  
Computed Tomography Scans ◽  
Skeletal Effects ◽  
Skeletal Expansion

ABSTRACT Objectives To evaluate whether the amount of rapid maxillary expansion differentially affects the skeletal and dentoalveolar changes that occur. Materials and Methods This randomized controlled trial included 23 patients who had rapid maxillary expansion (RME). Subjects were randomly assigned to a conventional expansion control group (n = 12) or an overexpansion group (n = 11), who started treatment at 13.2 ± 1.5 and 13.8 ± 1 years of age, respectively. Cone beam computed tomography scans (11 cm) were obtained prior to rapid maxillary expander (RME) delivery and approximately 3.7 months later. Initial hand-wrist radiographs were used to determine the participants' skeletal maturity. Results The RME screws were activated 5.6 ± 1.2 mm and 10.1 ± 0.6 mm in the conventional and overexpansion groups, respectively. Overexpansion produced significantly greater expansion of the nasal cavity (2.1X–2.5X), maxillary base (2.3X), buccal alveolar crest (1.4X), and greater palatine foramina (1.9X). Significantly greater intermolar width increases (1.8X) and molar inclination (2.8X) changes were also produced. The nasal cavity and maxillary base expanded 23%–32% as much as the screws were activated. Skeletal expansion was positively correlated with RME screw activation (R = 0.61 to 0.70) and negatively correlated (R = −0.56 to −0.64) with the patients' skeletal maturation indicators (SMIs). Together, screw activation and the patients' SMI scores explained 48%–66% of the variation in skeletal expansion. Conclusions This pilot study shows that overexpansion produces greater changes than conventional expansion, with greater skeletal effects among less mature patients.

scholarly journals Safety and Effects of the Rapid Maxillary Expander on Temporomandibular Joint in Subjects Affected by Juvenile Idiopathic Arthritis: A Retrospective Study

Children ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 33
Author(s):  
Andrea Abate ◽  
Davide Cavagnetto ◽  
Francesca Maria Emilia Rusconi ◽  
Paolo Cressoni ◽  
Luca Esposito
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Nasal Cavity ◽  
Rapid Maxillary Expansion ◽  
T Test ◽  
Maxillary Expansion ◽  
Retrospective Case ◽  
Linear Measurements ◽  
Palatal Expansion ◽  
Mandibular Hypoplasia ◽  
Before And After

Background: In Juvenile Idiopathic Arthritis (JIA) temporo-mandibular joints are often affected causing skeletal and dental malocclusions. The most frequent condition is mandibular hypoplasia, that may be associated with maxillary hypoplasia. The aim of this retrospective case control study is to investigate the effects and the safety of rapid maxillary expansion (RME) in growing patients affected by JIA. It was evaluated whether RME could be performed without complications on TMJs of JIA patients using DC/TMD protocol, and naso-maxillary transversal parameters were compared with the ones obtained on healthy patients. Methods: Twenty-five patients affected by JIA that ceased to manifest TMJ (Temporo-Mandibular Joint) symptoms in the previous year were treated with RME to solve the maxillary transverse hypoplasia. Postero-anterior cephalometric tracings were collected before and after treatment; linear measurements were obtained to study maxillary and nasal cavity modifications. Data were compared to those of a similar group of twenty-five healthy patients. Paired t-test and Independent t-test were used to evaluate changes before and after treatment in each group and to perform a comparison between the groups. Results: All patients demonstrated a statistically significant increase in nasal cavity width, maxillary width and upper and lower intermolar width. No patients presented a worsening of their TMJs condition. Intragroup comparisons revealed significant changes of cephalometric measurements, but no difference was found when comparing JIA and healthy patients. Conclusions: Growing patients with JIA that ceased to show signs of active TMJ involvement for at least one year could be safely treated with RME, expecting similar benefits to those of healthy patients. Dentists and rheumatologists should be informed of safety and potential benefits of palatal expansion in JIA patients in order to improve the outcome of orthodontic treatment and reduce the indication for more invasive procedures (i.e., Surgical Assisted Rapid Maxillary Expansion).

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