Periodontal and dental effects of surgically assisted rapid maxillary expansion, assessed by using digital study models

OBJECTIVE: The present study assessed the maxillary dental arch changes produced by surgically assisted rapid maxillary expansion (SARME). METHODS: Dental casts from 18 patients (mean age of 23.3 years) were obtained at treatment onset (T1), three months after SARME (T2) and 6 months after expansion (T3). The casts were scanned in a 3D scanner (D-250, 3Shape, Copenhagen, Denmark). Maxillary dental arch width, dental crown tipping and height were measured and assessed by ANOVA and Tukey's test. RESULTS: Increased transversal widths from T1 and T2 and the maintenance of these values from T2 and T3 were observed. Buccal teeth tipping also showed statistically significant differences, with an increase in all teeth from T1 to T2 and a decrease from T2 to T3. No statistically significant difference was found for dental crown height, except for left first and second molars, although clinically irrelevant. CONCLUSION: SARME proved to be an effective and stable procedure, with minimum periodontal hazards.

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Rapid maxillary expansion in contemporary orthodontic literature

APOS Trends in Orthodontics ◽

10.4103/2321-1407.183148 ◽

2016 ◽

Vol 6 ◽

pp. 129-136

Author(s):

Sabrina Mutinelli ◽

Mauro Cozzani

Keyword(s):

Rapid Maxillary Expansion ◽

Mixed Dentition ◽

Dental Arch ◽

Maxillary Expansion ◽

Deciduous Dentition ◽

Arch Width ◽

Class 1 ◽

Adolescents And Adults ◽

Dental Arch Width ◽

Untreated Individuals

We have reviewed our retrospective research about rapid maxillary expansion performed in the early mixed dentition to summarize the results of different studies regarding maxillary dental arch width variation and crowding improvement in light of contemporary literature. The aim is to define the effects of treatments followed until the end of dental arch growth. In all studies, a Haas expander anchored to the deciduous dentition was used. The samples consisted of treated patients with and without a lateral crossbite and homogeneous untreated individuals as controls. Two additional control groups of adolescents and adults in dental Class 1 were also compared. As a result of the analysis, rapid maxillary expansion with anchorage to the deciduous dentition was found to be effective in increasing transverse width in intermolar and intercanine areas, and the change was preserved until the full permanent dentition stage. When performed before maxillary lateral incisors have fully erupted, this procedure allows for a rapid increase in the arch length in the anterior area and consequently, in the space available for permanent incisors with a stable reduction in crowding over time.

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Shape and Size of Dental Arch

Methods of Information in Medicine ◽

10.1055/s-0038-1634066 ◽

2006 ◽

Vol 45 (02) ◽

pp. 191-194 ◽

Cited By ~ 2

Author(s):

E. Tauferová ◽

Z. Teuberová ◽

M. Seydlová ◽

V. Smutný ◽

J. Racek ◽

...

Keyword(s):

Reference Points ◽

Dental Arch ◽

Special Device ◽

Initial Examination ◽

Arch Width ◽

Optical Head ◽

Significant Difference ◽

Before And After ◽

Dental Arch Width ◽

Calibrated Images

Summary Objectives: The diagnostic procedure commences with the initial examination, during which a number of individual findings of the occlusion or malocclusion are clarified [1]. The objective is to describe the morphological and functional characteristics on each patient using specific guidelines, and then to provide a prognosis of the therapy. Upper and lower arch compression in first premolars and molars area was visible before treatment. Methods: A special device (Czech technical university research prototype) was prepared for this purpose. The optical head contains a digital color camera. The front of the optical head consists of a removable prism which is put into the mouth. The findings can display live images from the camera, which can be archived on a PC. The device captured and geometrically calibrated images permitting comparison of several different dental casts. Results: In the first part of this study 792 sets of study plaster casts were screened. Measurements of dental arch width between reference points of canines, first premolars and first molars were made: upper jaw: men: 3-3 – 35.1 mm (SE 0.13); 4-4 – 37.5 mm (SE 0.13); 6-6 – 48.1 mm (SE 0.19); women: 3-3 – 33.4 mm (SE 0.13); 4-4 – 35.6 mm (SE 0.15); 6-6 – 46.7 mm (SE 0.19). The second part concerns the group of 36 patients which is different from the 792 controls. There were studied changes between initial, post-treatment and post-retention alignment of upper and lower dental arch. Conclusions: Geometrically calibrated images help compare several different steps of the treatment and show a significant difference between patients before and after treatment.

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Dental Arch Width in Children and Relationship to their Oral Habits

Bangladesh Journal of Orthodontics and Dentofacial Orthopedics ◽

10.3329/bjodfo.v7i1.43688 ◽

2019 ◽

pp. 6-11

Author(s):

Kohinur Akther ◽

Md Zakir Hossain

Keyword(s):

School Children ◽

Cross Sectional Study ◽

Primary School Children ◽

Dental Arch ◽

Sectional Study ◽

Cross Sectional ◽

Oral Habits ◽

Arch Width ◽

Bangladeshi Population ◽

Dental Arch Width

Aim: Objectives: To analyze variations in dental arch width in relation to oral habits. Materials and Methods : Cross sectional study was carried out Department of Orthodontics & Dentofacial Orthopedics of Dhaka Dental College & Hospital, Dhaka with a total number of 600 primary school children of 3-6 years ages of Bangladeshi population. Results: This study was a cross sectional study conducted among the 600 children with 3-6 years old prima- ry school children of Bangladeshi population. According to present study, bottle feeding causes significant reduction in maxillary intercanine width and mouth breathers show significant reduction of both arches. Conclusion: It was observed that the children who had used a bottle had a significant reduction in maxillary intercanine width. Breathing through mouth appeared to be associated with a reduction in the size of both arches. This was more significant in the maxillary intercanine , mandibular intercanine and mandibular molar widths. Therefore to prevent malocclusions, the public should be informed of the harm caused by certain oral habits, the benefits of breast-feeding, and the need to correct bad habits at early life. Ban J Orthod & Dentofac Orthop, April 2016; Vol-7 (1-2), P.6-11

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Changes in the Upper and Lower Pharyngeal Airway Spaces Associated with Rapid Maxillary Expansion

ISRN Dentistry ◽

10.5402/2012/290964 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 8

Author(s):

Fitin Aloufi ◽

Charles B. Preston ◽

Khalid H. Zawawi

Keyword(s):

Orthodontic Treatment ◽

Upper Airway ◽

Rapid Maxillary Expansion ◽

Lower Airway ◽

Control Group ◽

Maxillary Expansion ◽

Pharyngeal Airway ◽

Significant Difference ◽

And Gender ◽

Maxillary Constriction

Objectives. The primary objectives of this retrospective study were first to compare the upper and lower pharyngeal airway spaces between orthodontic patients with and without maxillary constriction and second to evaluate the effect of rapid maxillary expansion (RME) on these airway spaces. A secondary objective was to compare the mode of breathing between groups. Materials and Methods. The experimental (RME) group consisted of 30 patients (mean age, years, 16 boys and 14 girls) with maxillary constriction who were treated with hyrax-type RME. The control group comprised the records of age- and gender matched patients (mean age, years, 16 boys and 14 girls) with no maxillary constriction but requiring nonextraction comprehensive orthodontic treatment. Cephalometric measurements in the sagittal dimension of upper and lower airway spaces for the initial and final records were recorded. Mode of breathing and length of treatment were also compared. Results. The sagittal dimension of the upper airway increased significantly in the RME group ( mm) compared to the control group ( mm), . However, there was no significant difference in the lower pharyngeal airway measurement between the RME group () and the control group (), . There was no significant difference with respect to mode of breathing between the two groups (). Conclusion. Rapid maxillary expansion (RME) during orthodontic treatment may have a positive effect on the upper pharyngeal airway, with no significant change on the lower pharyngeal airway.

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Effects of rapid maxillary expansion in cleft patients resulting from the use of two different expanders

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.2016-001.aop ◽

2016 ◽

Vol 21 (6) ◽

pp. 82-90 ◽

Cited By ~ 1

Author(s):

Daniel Santos Fonseca Figueiredo ◽

Lucas Cardinal ◽

Flávia Uchôa Costa Bartolomeo ◽

Juan Martin Palomo ◽

Martinho Campolina Rebello Horta ◽

...

Keyword(s):

Cleft Lip ◽

Cleft Lip And Palate ◽

Rapid Maxillary Expansion ◽

Cone Beam ◽

Tomographic Image ◽

Maxillary Expansion ◽

Downward Movement ◽

Computed Tomographic ◽

Significant Difference ◽

Maxillary Region

ABSTRACT Objective: The aim of this study was to evaluate the skeletal and dental effects of rapid maxillary expansion (RME) in cleft patients using two types of expanders. Methods: Twenty unilateral cleft lip and palate patients were randomly divided into two groups, according to the type of expander used: (I) modified Hyrax and (II) inverted Mini-Hyrax. A pretreatment cone-beam computed tomographic image (T0) was taken as part of the initial orthodontic records and three months after RME, for bone graft planning (T1). Results: In general, there was no significant difference among groups (p > 0.05). Both showed a significant transverse maxillary expansion (p < 0.05) and no significant forward and/or downward movement of the maxilla (p > 0.05). There was greater dental crown than apical expansion. Maxillary posterior expansion tended to be larger than anterior opening (p < 0.05). Cleft and non-cleft sides were symmetrically expanded and there was no difference in dental tipping between both sides (p > 0.05). Conclusions: The appliances tested are effective in the transverse expansion of the maxilla. However, these appliances should be better indicated to cleft cases also presenting posterior transverse discrepancy, since there was greater expansion in the posterior maxillary region than in the anterior one.

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Rapid maxillary expansion: Do banded teeth develop more external root resorption than non-banded anchorage teeth?

The Angle Orthodontist ◽

10.2319/011015-20.1 ◽

2015 ◽

Vol 86 (1) ◽

pp. 39-45 ◽

Cited By ~ 3

Author(s):

Débora C Martins ◽

Bernardo Q Souki ◽

Paula L Cheib ◽

Gerluza A.B Silva ◽

Igor D.G Reis ◽

...

Keyword(s):

Root Resorption ◽

Rapid Maxillary Expansion ◽

Control Group ◽

Maxillary Expansion ◽

Orthodontic Anchorage ◽

External Root Resorption ◽

Significant Difference ◽

Band Group ◽

Orthodontic Forces ◽

Root Surfaces

ABSTRACT Objective: To compare external root resorption (ERR) when bands and wires are used as orthodontic anchorage during rapid maxillary expansion (RME). Materials and Methods: Histologic analysis was performed on 108 sites from 18 maxillary first premolars and on 36 sites from six mandibular first premolars in nine subjects (mean age = 15.2 ± 1.4 years) 3 months after RME. Maxillary teeth were pooled into two groups (n = 54 each) according to the type of orthodontic anchorage (band group [BG] vs wire group [WG]). Anchorage type was randomly chosen in a split-mouth design. Mandibular first premolars, which were not subjected to orthodontic forces, were used as the control group (CG). Results: All premolars in the BG and WG showed ERR at the level of the cementum and dentin. Repair with cementum cells was observed in all resorption areas, but complete repair was rarely found. No statistically significant difference was found between the BG and WG with regard to the ERR. No association was found between the root height position (middle or cervical third) and the incidence of ERR. Buccal root surfaces showed a higher amount of ERR compared with the palatal and interproximal surfaces. ERR was not found in any teeth in the CG. Conclusion: All maxillary first premolars subjected to RME showed ERR and partial cementum repair. Banded teeth did not develop more ERR than nonbanded anchorage teeth.

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Dental arch changes following rapid maxillary expansion

European Journal of Orthodontics ◽

10.1093/ejo/cjn045 ◽

2008 ◽

Vol 30 (5) ◽

pp. 469-476 ◽

Cited By ~ 22

Author(s):

S. Mutinelli ◽

M. Cozzani ◽

M. Manfredi ◽

M. Bee ◽

G. Siciliani

Keyword(s):

Rapid Maxillary Expansion ◽

Dental Arch ◽

Maxillary Expansion

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Establishment of Yemeni Dental Arch Form

Orthodontic Journal of Nepal ◽

10.3126/ojn.v3i2.10073 ◽

2013 ◽

Vol 3 (2) ◽

pp. 22-26

Author(s):

Nabil M Al-Zubair

Keyword(s):

Dental Arch ◽

Clustering Method ◽

Arch Form ◽

Arch Width ◽

Length Measurements ◽

Arch Forms ◽

Dental Arch Width ◽

Dental Cast ◽

Dental Arch Form

Objective: To assess the dental arch forms of Yemeni adult sample. Materials & Method: The Eucledian clustering method of analysis was utilized for the determination of dental arch form. A total of 398 study models were constructed and evaluated to do measurements for both arches using a modified sliding caliper gauge. Six dental cast measurements divided into three sagittal and three transverse measurements were utilized to represent the dental arch width and length measurements. Result: Narrow form is the most prevalent arch form (30.9%) followed by wide form (23.9%), their prominence appear more in females and the least prevalent arch form was the mid form (9.3%), while flat and pointed forms were in between 18.3% and 17.6% respectively. Conclusion: Five arch forms: narrow, wide, mid, pointed and flat were distinguished as unique forms for the dental arches, with the predominance of the narrow arch form were found among Yemeni adults.

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