Factors affecting buccal bone changes of maxillary posterior teeth after rapid maxillary expansion

Rapid maxillary expansion is defined as the release of medio-palatine suture using an orthopedic forces. The role of this procedure is to expand the upper jaw in order to achieve the broadening of the upper arch. This study was initiated to quantify the effects of disjunction and post- treatment bone changes, after an adequate contention which lasted for three weeks. This study is carried on laboratory animals (common breed rabbit) to determine tensile strength and the elasticity modulus of biological materials used in orthdodontics. The results of the study are consistent with those reported in the literature reference.

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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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Alveolar bone changes after rapid maxillary expansion with tooth-born appliances: a systematic review

European Journal of Orthodontics ◽

10.1093/ejo/cjx057 ◽

2017 ◽

Vol 40 (3) ◽

pp. 296-303 ◽

Cited By ~ 18

Author(s):

Antonino Lo Giudice ◽

Ersilia Barbato ◽

Leandro Cosentino ◽

Claudia Maria Ferraro ◽

Rosalia Leonardi

Keyword(s):

Systematic Review ◽

Alveolar Bone ◽

Rapid Maxillary Expansion ◽

Maxillary Expansion ◽

Bone Changes

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Cone-beam computed tomography evaluation of dental, skeletal, and alveolar bone changes associated with bonded rapid maxillary expansion

The Journal of Indian Orthodontic Society ◽

10.4103/0301-5742.175709 ◽

2016 ◽

Vol 50 (1) ◽

pp. 19-25 ◽

Cited By ~ 2

Author(s):

Namrata Dogra ◽

M S Sidhu ◽

Ashish Dabas ◽

Seema Grover ◽

Manish Gupta

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Rapid Maxillary Expansion ◽

Cone Beam ◽

Maxillary Expansion ◽

Bone Changes

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Buccal alveolar bone changes following rapid maxillary expansion and fixed appliance therapy

The Angle Orthodontist ◽

10.2319/060220-504.1 ◽

2020 ◽

Author(s):

Adam Sperl ◽

Laurence Gaalaas ◽

John Beyer ◽

Thorsten Grünheid

Keyword(s):

Computed Tomography ◽

Alveolar Bone ◽

Treatment Time ◽

Rapid Maxillary Expansion ◽

Cone Beam ◽

Maxillary Expansion ◽

Bone Thickness ◽

Fixed Appliance ◽

Computed Tomography Scans ◽

Bone Changes

ABSTRACT Objectives To assess factors that may be associated with buccal bone changes adjacent to maxillary first molars after rapid maxillary expansion (RME) and fixed appliance therapy. Materials and Methods Pretreatment (T1) and posttreatment (T2) cone-beam computed tomography scans were obtained from 45 patients treated with RME and preadjusted edgewise appliances. Buccal alveolar bone thickness was measured adjacent to the mesiobuccal root of the maxillary first molar 4 mm, 6 mm, and 8 mm apical to the cementoenamel junction, and anatomic defects were recorded. Paired and unpaired t-tests were used to compare alveolar bone thickness at T1 and T2 and to determine whether teeth with posttreatment anatomic defects had thinner initial bone. Correlation analyses were used to examine relationships between buccal alveolar bone thickness changes and amount of expansion, initial bone thickness, age at T1, postexpansion retention time, and treatment time. Results There was a statistically significant reduction in buccal alveolar bone thickness from T1 to T2. Approximately half (47.7%) of the teeth developed anatomic defects from T1 to T2. These teeth had significantly thinner buccal bone at T1. Reduction in alveolar bone thickness was correlated with only one tested variable: initial bone thickness. Conclusions RME and fixed-appliance therapy can be associated with significant reduction in buccal alveolar bone thickness and an increase in anatomic defects adjacent to the expander anchor teeth. Anchor teeth with greater initial buccal bone thickness have less reduction in buccal bone thickness and are less likely to develop posttreatment anatomic defects of buccal bone.

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Alveolar bone changes after asymmetric rapid maxillary expansion

The Angle Orthodontist ◽

10.2319/090214.1 ◽

2014 ◽

Vol 85 (5) ◽

pp. 799-805 ◽

Cited By ~ 6

Author(s):

Mehmet Akin ◽

Zeliha Muge Baka ◽

Zehra Ileri ◽

Faruk Ayhan Basciftci

Keyword(s):

Cortical Bone ◽

Alveolar Bone ◽

Rapid Maxillary Expansion ◽

Maxillary Expansion ◽

Bone Thickness ◽

Unaffected Side ◽

Posterior Teeth ◽

Cortical Bone Thickness ◽

Paired Samples ◽

Affected Side

ABSTRACT Objective: To quantitatively evaluate the effects of asymmetric rapid maxillary expansion (ARME) on cortical bone thickness and buccal alveolar bone height (BABH), and to determine the formation of dehiscence and fenestration in the alveolar bone surrounding the posterior teeth, using cone-beam computed tomography (CBCT). Materials and Methods: The CBCT records of 23 patients with true unilateral posterior skeletal crossbite (10 boys, 14.06 ± 1.08 years old, and 13 girls, 13.64 ± 1.32 years old) who had undergone ARME were selected from our clinic archives. The bonded acrylic ARME appliance, including an occlusal stopper, was used on all patients. CBCT records had been taken before ARME (T1) and after the 3-month retention period (T2). Axial slices of the CBCT images at 3 vertical levels were used to evaluate the buccal and palatal aspects of the canines, first and second premolars, and first molars. Paired samples and independent sample t-tests were used for statistical comparison. Results: The results suggest that buccal cortical bone thickness of the affected side was significantly more affected by the expansion than was the unaffected side (P < .05). ARME significantly reduced the BABH of the canines (P < .01) and the first and second premolars (P < .05) on the affected side. ARME also increased the incidence of dehiscence and fenestration on the affected side. Conclusions: ARME may quantitatively decrease buccal cortical bone thickness and height on the affected side.

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Evaluation of the effects of modified bonded rapid maxillary expansion on occlusal force distribution: A pilot study

European Journal of Dentistry ◽

10.4103/1305-7456.175695 ◽

2016 ◽

Vol 10 (01) ◽

pp. 103-108

Author(s):

Fatma Deniz Uzuner ◽

Hande Odabasi ◽

Secil Acar ◽

Tuba Tortop ◽

Nilufer Darendeliler

Keyword(s):

Rapid Maxillary Expansion ◽

Rank Test ◽

Force Distribution ◽

Maxillary Expansion ◽

Initial Value ◽

Posterior Teeth ◽

Occlusal Force ◽

Signed Rank ◽

Signed Rank Test ◽

Mandibular Posterior Teeth

ABSTRACT Objective: To evaluate the effects of modified bonded rapid maxillary expansion (RME) on occlusal force distribution. Materials and Methods: The sample included 12 patients (7 girls and 5 boys; mean age: 13.1 years) at the permanent dentition stage with bilateral posterior cross-bite. The patients were treated with a modified bonded RME appliance, activated twice a day. The study was terminated when the palatal cusps of the maxillary posterior teeth were occluding with the buccal cusps of the mandibular posterior teeth. The postretention period was 3 months. The T-Scan III device was used to analyze the percentages of occlusal force distribution, and records were taken at the pretreatment (T1), the postreatment (T2), and the postretention (T3) periods. Wilcoxon signed rank test was used for statistical analyses. Results: Incisors were most frequently without contact, followed by canines. The highest forces were seen in the second and first molar regions. A significant decrease was seen in total occlusal force during treatment (T1–T2); however, during retention, the force returned to its initial value, and no significant differences were found (T1–T3). No differences were found between right and left sides and in occlusal forces of the teeth in all time periods. Conclusion: The use of modified bonded RME decreases the total occlusal forces during the treatment period, but it does returns to its initial value after the postretention period.

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Cone-beam computed tomography evaluation of dental, skeletal, and alveolar bone changes associated with bonded rapid maxillary expansion

The Journal of Indian Orthodontic Society ◽

10.1177/0974909820160105 ◽

2016 ◽

Vol 50 (1) ◽

pp. 19-25 ◽

Cited By ~ 1

Author(s):

Namrata Dogra ◽

M S Sidhu ◽

Ashish Dabas ◽

Seema Grover ◽

Manish Gupta

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Rapid Maxillary Expansion ◽

Cone Beam ◽

Maxillary Expansion ◽

Bone Changes

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Root Resorption of Maxillary Posterior Teeth after Rapid Maxillary Expansion: A Comprehensive Review of the Current Evidence from in-vitro and in-vivo Studies

The Open Dentistry Journal ◽

10.2174/1874210602115010097 ◽

2021 ◽

Vol 15 (1) ◽

pp. 97-101

Author(s):

Vincenzo Ronsivalle ◽

Federica Casella ◽

Grazia Fichera ◽

Orazio Bennici ◽

Cristina Conforte ◽

...

Keyword(s):

Root Resorption ◽

Rapid Maxillary Expansion ◽

Current Evidence ◽

Radiographic Examination ◽

Biological Processes ◽

Maxillary Expansion ◽

Posterior Teeth ◽

Retention Period

Background: The application of heavy forces to the dentition, as those produced during a Rapid Maxillary Expansion (RME), has been associated in the literature with the development of root resorption of maxillary posterior teeth. Objective: The aim of the present manuscript was to report the available data from in-vitro and in-vivo studies that can elucidate the biological processes of resorption and repair of radicular cementum after RME. Methods: Studies evaluating the occurrence of root resorption after RME by means of histological and radiographic methodology were included. We detailed the changes of the radicular anatomy after RME and provided a synthesis of the most valuable scientific evidence showing the biological processes behind the potential modifications of radicular anatomy. Results. Loss of cementum material and reduction of radicular volumes were seen after rapid maxillary expansion. A small radicular volumetric recovery of anchored teeth occurred after the retention period; this reparative phenomenon was caused by cementum deposition without the reattachment of periodontal fibers, supporting the detrimental effects associated with RR. Conclusion:Retention period and the timing of radiographic examination could influence the extension of radicular resorption detected after RME since root resorption and cementum repair may occur at the same time at this stage.

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Transverse dentoalveolar response of mandibular arch after rapid maxillary expansion (RME) with tooth-borne and bone-borne appliances:

The Angle Orthodontist ◽

10.2319/042520-353.1 ◽

2020 ◽

Vol 90 (5) ◽

pp. 680-687 ◽

Cited By ~ 1

Author(s):

Antonino Lo Giudice ◽

Vincenzo Ronsivalle ◽

Manuel Lagravere ◽

Rosalia Leonardi ◽

Stefano Martina ◽

...

Keyword(s):

Rapid Maxillary Expansion ◽

Cone Beam ◽

Significant Gain ◽

Maxillary Expansion ◽

Posterior Teeth ◽

Mandibular Arch ◽

Angular Measurements ◽

Clinically Significant ◽

Mandibular Posterior Teeth ◽

Coronal View

ABSTRACT Objectives To assess and compare spontaneous expansion of mandibular posterior teeth between tooth-borne (TB) and bone-borne (BB) rapid maxillary expansion (RME). Materials and Methods This study included 36 adolescents with bilateral maxillary crossbite receiving tooth-borne (average age: 14.4 ± 1.3 years) or bone-borne (average age: 14.7 ± 1.4 years) maxillary expansion. Cone beam computed tomography was acquired before expansion (T1) and after 6 months' retention (T2). Specific linear and angular measurements were performed in the coronal view to assess buccal inclinations and widths of mandibular posterior units. All data were statistically analyzed. Results In both groups there was a significant increase in buccal-lingual inclination of mandibular posterior teeth ranging from 1.67° to 2.30° in the TB group and from 1.46° to 2.11° in BB group. Mandibular posterior widths showed an increase ranging from 0.80 mm to 1.33 mm in TB group and from 0.64 mm to 0.96 mm in the BB group. No differences between groups were found for linear or angular measurements. Conclusions A clinically significant gain of space in the mandibular arch should not be expected after RME.

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