Long-Term Results of a Modified Removable Expansion Plate to Increase Arch Length: A Series of 10 Cases

Crowding, protrusion, and class II or end-on occlusion are malocclusions frequently associated with a narrow transverse dimension. The goal of expansion is to reduce the need for extractions in permanent dentition through elimination of arch length discrepancies as well as correction of bony base imbalances. Gaining arch length makes the subsequent fixed appliance treatment easier and shorter. Palatal expansion is usually achieved by using fixed rapid maxillary expansion, but because of the complexity, cost, and increased laboratory steps, this step is sometimes omitted. We have modified the design and screw activation protocol of the removable Schwarz plate in such a way that it gives efficient and stable expansion as well as arch perimeter gain with simpler mechanics. We present the long-term results of 10 such cases treated with this modified expander followed by fixed appliances.

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Long-term effects of Class III treatment with rapid maxillary expansion and facemask therapy followed by fixed appliances

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1067/mod.2003.44 ◽

2003 ◽

Vol 123 (3) ◽

pp. 306-320 ◽

Cited By ~ 162

Author(s):

Patricia Vetlesen Westwood ◽

James A. McNamara ◽

Tiziano Baccetti ◽

Lorenzo Franchi ◽

David M. Sarver

Keyword(s):

Rapid Maxillary Expansion ◽

Class Iii ◽

Long Term Effects ◽

Maxillary Expansion ◽

Fixed Appliances ◽

Class Iii Treatment

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MODERN PERSPECTIVES ON RAPID PALATAL EXPANSION

International Journal of Advanced Research ◽

10.21474/ijar01/12864 ◽

2021 ◽

Vol 9 (5) ◽

pp. 497-500

Author(s):

Kinnari Markana ◽

Keyword(s):

Transverse Dimension ◽

Rapid Maxillary Expansion ◽

Maxillary Expansion ◽

Negative Effects ◽

Palatal Expansion ◽

Beneficial Effects ◽

Rapid Palatal Expansion ◽

Mini Implants ◽

Maxillary Deficiency ◽

Skeletal Expansion

Maxillary deficiency in the transverse dimension is a common problem in children. The conventional management of such malocclusion is with conventional rapid maxillary expansion. The beneficial effects of such an orthodontic therapy are explained in detail in the literature. But there are also negative effects of conventional rapid maxillary expansion. Thus, the improvements in the methods of expansion has led to discovery of miniscrew assisted rapid palatal expansion. The miniscrew assisted rapid palatal expansion are supported by mini implants and thus enable better skeletal expansion of maxilla. This article will discuss the favourable effects, negative effects, and clinical uses of conventional and miniscrew assisted rapid palatal expansion.

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Long-term stability of rapid maxillary expansion combined with chincup protraction followed by fixed appliances

The Angle Orthodontist ◽

10.2319/012514-68.1 ◽

2015 ◽

Vol 85 (2) ◽

pp. 270-277 ◽

Cited By ~ 2

Author(s):

Juan Carlos Palma ◽

Natalia Tejedor-Sanz ◽

M. Dolores Oteo ◽

José Antonio Alarcón

Keyword(s):

Rapid Maxillary Expansion ◽

Maxillary Expansion ◽

Term Stability ◽

Long Term Stability ◽

Fixed Appliances

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Long-Term Results of Rapid Maxillary Expansion and Facemask: Long-Term of Regular Protraction

Turkish Journal of Orthodontics ◽

10.13076/tjo-d-14-00011 ◽

2014 ◽

Vol 27 (2) ◽

pp. 51-62

Author(s):

Şirin Nevzatoğlu ◽

Nazan Küçükkeleş

Keyword(s):

Rapid Maxillary Expansion ◽

Long Term Results ◽

Maxillary Expansion

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Long-Term Effects of Rapid Maxillary Expansion Followed by Fixed Appliances

The Angle Orthodontist ◽

10.2319/011209-22.1 ◽

2010 ◽

Vol 80 (1) ◽

pp. 5-9 ◽

Cited By ~ 46

Author(s):

Hakan Gurcan Gurel ◽

Badel Memili ◽

Mustafa Erkan ◽

Yusuf Sukurica

Keyword(s):

Rapid Maxillary Expansion ◽

Long Term Effects ◽

Maxillary Expansion ◽

Long Term Changes ◽

Fixed Appliances ◽

Relapse Rates ◽

Maxillary Arch

Abstract Objective: To evaluate the long-term changes in maxillary arch widths, overjet, and overbite in patients who were treated with rapid maxillary expansion (RME) followed by edgewise appliances. Materials and Methods: The material for the study consisted of study casts taken from 41 patients (19 males, 22 females) on four different occasions (before treatment, T1; after RME, T2; after treatment, T3; and during follow-up period, T4). The upper intercanine, interpremolar, and intermolar widths and overjet and overbite were measured on each set of study casts. Mean age of the subjects was 13.2 ± 1.3 years (range, 11.2–16.9 years) at T1, 13.3 ± 1.3 years (range, 11.3–17 years) at T2, 15.5 ± 1.4 years (range, 13.1–18.8 years) at T3, and 20.4 ± 1.6 years (range, 17.9–24.8 years) at T4. Results: The net increase in intercanine width, interpremolar width, intermolar width, overjet, and overbite was 1.4 ± 2.4 mm, 4.6 ± 2.6 mm, 4.3 ± 2.5 mm, 0.1 ± 0.6 mm, and 0.2 ± 0.6 mm, respectively, and the relapse rates were 37% for intercanine width, 19% for interpremolar width, and 17% for intermolar width at the end of the follow-up period. Conclusions: A significant amount of relapse occurred in maxillary arch widths at the postretention assessment, the greatest being in intercanine width. RME significantly decreased overbite and increased overjet, and a statistically significant decrease was observed in both overbite and overjet at the postretention assessment.

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RAPID PALATAL EXPANSION AND ITS FEATURES

ASJ. ◽

10.31618/asj.2707-9864.2020.2.40.23 ◽

2020 ◽

Vol 2 (40) ◽

pp. 20-22

Author(s):

A.K. Al Dzhafari ◽

S.A. Ulyanovskaya

Keyword(s):

Rapid Maxillary Expansion ◽

Maxillary Expansion ◽

Maxillofacial Region ◽

Posterior Teeth ◽

Anatomical Features ◽

Palatal Expansion ◽

Rapid Palatal Expansion ◽

Congenital Deformities ◽

Upper Jaw ◽

Mid Palatal Suture

Rapid Maxillary expansion or palatal expansion as it is sometimes called, occupies unique niche in dentofacial therapy. Rapid Maxillary expansion (RME) is a skeletal type of expansion that involves the separation of the mid-palatal suture and movement of the maxillary shelves away from each other. RME effects the maxillary complex, palatal vaults, maxillary anterior and posterior teeth, adjacent periodontal structures to bring about an expansion in the maxillary arch. Morphogenesis and anatomical features of the upper jaw determine the choice of the method of rapid palatal expansion with narrowing of the upper dentition, as an effective method for eliminating congenital deformities of the maxillofacial region. The majority of dental transverse measurements changed significantly as a result of RME. The maturity of the maxillofacial structures determines the timing and degree of success of rapid palatal dilatation treatment.

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Condylar Changes in Children with Posterior Crossbite after Maxillary Expansion: Tridimensional Evaluation

Children ◽

10.3390/children8010038 ◽

2021 ◽

Vol 8 (1) ◽

pp. 38

Author(s):

Rosamaria Fastuca ◽

Helga Turiaco ◽

Fausto Assandri ◽

Piero A. Zecca ◽

Luca Levrini ◽

...

Keyword(s):

Rapid Maxillary Expansion ◽

3D Analysis ◽

Maxillary Expansion ◽

3D Slicer ◽

Palatal Expansion ◽

Posterior Crossbite ◽

Rapid Palatal Expansion ◽

Before And After ◽

Condylar Position ◽

Caucasian Patients

(1) Background: To investigate condylar position in subjects with functional posterior crossbite comparing findings before and after rapid maxillary expansion (RME) treatment through 3D analysis; (2) Methods: Thirty-two Caucasian patients (14 males, mean age 8 y 8 m ± 1 y 2 m; 18 females mean age 8 y 2 m ± 1 y 4 m) with functional posterior crossbite (FPXB) diagnosis underwent rapid palatal expansion with a Haas appliance banded on second deciduous upper molars. Patients’ underwent CBCT scans before rapid palatal expansion (T0) and after 12 months (T1). The images were processed through 3D slicer software; (3) Results: The condylar position changes between T1 and T0 among the crossbite and non-crossbite sides were not statistically significant, except for the transversal axis. At T1, the condyles moved forward (y axis) and laterally (x axis), they also moved downward (z axis) but not significantly; (4) Conclusions: Condilar position in growing patients with functional posterior crossbite did not change significantly after rapid maxillary expansion.

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Treatment of Unilateral Cleft Lip and Palate Patient With Intraoral Tooth Tissue Borne Distractor and Facemask Therapy: A Case Report

The Cleft Palate-Craniofacial Journal ◽

10.1177/1055665621993366 ◽

2021 ◽

pp. 105566562199336

Author(s):

Akansha Bansal Agrawal ◽

Harshavardhan Kidiyoor ◽

Anand K. Patil Morth

Keyword(s):

Case Report ◽

Cleft Lip ◽

Cleft Lip And Palate ◽

Face Mask ◽

Rapid Maxillary Expansion ◽

Growth Potential ◽

Maxillary Expansion ◽

Long Term Stability ◽

Tooth Tissue

This case report demonstrates the successful use of intraoral distractor/hygenic rapid expander (HYRAX) for rapid maxillary expansion in anteroposterior direction with an adjunctive use of face mask therapy for anterior orthopedic traction of maxillary complex in a cleft patient with concave profile. The patient was a 13-year-old girl who reported with a chief complaint of backwardly positioned upper jaw and a severely forward positioned lower jaw. Therefore, a treatment was chosen in which acrylic bonded rapid maxillary expansion was done with tooth tissue borne intraoral distractor/HYRAX having a different activation schedule along with Dr Henri Petit facemask to treat maxillary retrognathism. As a result, crossbite got corrected and attained a positive jet with no bone loss in cleft area over a period of 5 months which was followed by fixed mechanotherapy achieving a well settled occlusion in 1 year. After completion of expansion and fixed mechanotherapy, ANB became +1 post-treatment which was −4 pretreatment. The prognathic profile was markedly improved by expansion and taking advantage of the remaining growth potential, thus minimizing the chances of surgery later in life. This provided a viable alternative to orthognathic surgery with good long-term stability.

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