scholarly journals Long-term evaluation of rapid maxillary expansion and bite-block therapy in open bite growing subjects:

2018 ◽  
Vol 88 (5) ◽  
pp. 523-529 ◽  
Author(s):  
Manuela Mucedero ◽  
Dimitri Fusaroli ◽  
Lorenzo Franchi ◽  
Chiara Pavoni ◽  
Paola Cozza ◽  
...  
Keyword(s):  
Rapid Maxillary Expansion ◽  
Open Bite ◽  
Control Group ◽  
Long Term Effects ◽  
Maxillary Expansion ◽  
Bite Block ◽  
Mandibular Molars ◽  
Lateral Cephalograms ◽  
Skeletal Pattern

ABSTRACT Objective: To evaluate the long-term effects of rapid maxillary expansion (RME) and posterior bite block (BB) in prepubertal subjects with dentoskeletal open bite. Materials and Methods: The treatment group (TG) comprised 16 subjects (14 girls, 2 boys) with dentoskeletal open bite with a mean age of 8.1 ± 1.1 years treated with RME and BB. Three consecutive lateral cephalograms were available before treatment (T1), at the end of the active treatment with the RME and BB (T2), and at a follow-up observation at least 4 years after the completion of treatment (T3). The TG was compared with a control group (CG) of 16 subjects (14 girls, 2 boys) matched for sex, age, and vertical skeletal pattern. An independent sample t-test was used to compare the T1 to T3, T1 to T2, and T2 to T3 cephalometric changes between the TG and the CG. Results: In the long term, the TG showed a significantly greater increase in overbite (+1.8 mm), reduced extrusion of maxillary and mandibular molars (−3.3 mm), and, consequently, a significant decrease in facial divergence (−2.8°) when compared with untreated subjects. Conclusions: The RME and BB protocol led to successful and stable recovery of positive overbite in 100% of the patients considered. Correction of open bite was associated with reduced extrusion of maxillary and mandibular molars with a significant improvement in vertical skeletal relationships when compared with the CG.

scholarly journals Short-term and long-term effects of rapid maxillary expansion on the nasal soft and hard tissue:

2020 ◽  
Vol 91 (1) ◽  
pp. 46-53
Author(s):  
Cassie T. Truong ◽  
Hyeran H. Jeon ◽  
Puttipong Sripinun ◽  
Ann Tierney ◽  
Normand S. Boucher
Keyword(s):  
Normal Growth ◽  
Rapid Maxillary Expansion ◽  
Control Group ◽  
Long Term Effects ◽  
Maxillary Expansion ◽  
Hard Tissue ◽  
Alar Base ◽  
Significant Difference ◽  
Term Evaluation

ABSTRACT Objectives To evaluate nasal soft and hard tissue changes immediately post–rapid maxillary expansion (RME) and to assess the stability of these changes using cone beam computed tomography (CBCT). Materials and Methods A total of 35 treatment group (TG) patients (18 girls, 17 boys; 9.39 ± 1.4) had a pre-RME CBCT and a post-RME CBCT approximately 66 days after expansion, and 25 patients had a follow-up CBCT 2.84 years later. A total of 28 control group (CG; no RME) patients (16 girls, 12 boys; 8.81 ± 1.6) had an initial CBCT and a CBCT an average of 2.25 years later. Soft and hard tissue nasal landmarks were measured in transverse, sagittal, and coronal planes of space on CBCT scans. Differences within the same group were evaluated by paired t-tests or Wilcoxon signed-rank tests. Long-term comparisons between TG and CG were evaluated by independent-sample t-tests or Wilcoxon rank-sum tests. Results Immediately post-RME, there were statistically significant mean increases of 1.6 mm of alar base width, 1.77 mm of pyriform height, and 3.57 mm of pyriform width (P < .05). CG showed the significant increases over 2.25 years (P < .001). Compared with CG, the long-term evaluation of TG demonstrated only pyriform height and pyriform width showed a statistically significant difference (P < .01). Conclusions Although RME produced some significant increase on the nasal soft tissue immediately after expansion, it regressed to the mean of normal growth and development over time. However, long-term evaluation of TG compared with CG showed only pyriform height and pyriform width to be affected by RME.

scholarly journals Changes in mandibular shape after early treatment in subjects with open bite: a geometric morphometric analysis

2020 ◽  
Vol 42 (6) ◽  
pp. 643-649
Author(s):  
Roberta Lione ◽  
Dimitri Fusaroli ◽  
Manuela Mucedero ◽  
Valeria Paoloni ◽  
Chiara Pavoni ◽  
...  
Keyword(s):  
Open Bite ◽  
Procrustes Analysis ◽  
Control Group ◽  
Maxillary Expansion ◽  
Mandibular Ramus ◽  
Anterior Open Bite ◽  
Bite Block ◽  
Geometric Morphometric ◽  
Counterclockwise Rotation ◽  
Lateral Cephalograms

Summary Objectives To evaluate the mandibular modifications in anterior open bite (OB) growing subjects treated with Rapid Maxillary Expansion and bite block (RME/BB) or Quad Helix with crib (QH/C) when compared with a Control Group (CG) by using Geometric Morphometric Method (GMM) and conventional cephalometric. Materials The OB group comprised 34 subjects (26 girls, 8 boys) with dentoskeletal OB and a mean age of 8.0 ± 1.0 years. OB group was divided in two subgroups: RME/BB group comprised 17 subjects (13 girls, 4 boys), while QH/C group included 17 subjects (13 girls, 4 boys). The two subgroups were compared with a CG of 17 subjects (13 girls, 4 boys) matched for sex, age, vertical pattern, and observation periods. Two consecutives lateral cephalograms were available: the first one was taken before treatment (T1), and the second one was acquired at a follow-up observation at least 4 years after the completion of treatment (T2). Landmarks and semilandmarks were digitized on lateral cephalograms and GMM was applied. Procrustes analysis and principal component analysis were performed. Analysis of variance (ANOVA) with Tukey post hoc tests was used to compare the T2–T1 cephalometric changes between the RME/BB, QH/C, and CG. Results In the long term, RME/BB showed a significantly greater decrease of the Condylar axis to mandibular plane angle when compared to CG and QH/C. GMM showed an increased in height of the mandibular ramus in RME/BB group with tendency to counterclockwise rotation of the mandible when compared with QH/C and CG groups. Conclusions RME/BB subjects showed significant changes in the shape of the mandibular ramus with a counterclockwise rotation tendency when compared with QH/C and CG subjects.

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

2003 ◽  
Vol 123 (3) ◽  
pp. 306-320 ◽  
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

Does rapid maxillary expansion have long-term effects on airway dimensions and breathing?

2011 ◽  
Vol 140 (2) ◽  
pp. 146-156 ◽  
Author(s):  
Carolina Baratieri ◽  
Matheus Alves ◽  
Margareth Maria Gomes de Souza ◽  
Mônica Tirre de Souza Araújo ◽  
Lucianne Cople Maia
Keyword(s):  
Rapid Maxillary Expansion ◽  
Long Term Effects ◽  
Maxillary Expansion ◽  
Airway Dimensions

scholarly journals Molar Changes with Cervical Headgear Alone or in Combination with Rapid Maxillary Expansion

2008 ◽  
Vol 78 (5) ◽  
pp. 847-851 ◽  
Author(s):  
Marcel Marchiori Farret ◽  
Eduardo Martinelli S. de Lima ◽  
Vanessa Pereira Araújo ◽  
Susana Maria Deon Rizzatto ◽  
Luciane Macedo de Menezes ◽  
...  
Keyword(s):  
Class Ii ◽  
Rapid Maxillary Expansion ◽  
Control Group ◽  
Maxillary Expansion ◽  
Lateral Cephalograms ◽  
Cervical Traction ◽  
Permanent Molars ◽  
Group 2 ◽  
First Permanent Molars ◽  
Group 1

Abstract Objective: To test the hypothesis that there is no difference in the distal movement of the maxillary first permanent molars when cervical headgear is used alone or in combination with rapid maxillary expansion. Materials and Methods: The sample was composed of 36 subjects (aged 9 to 13 years), treated in the Faculty of Dentistry, Pontifícia Universidade Cat;aaolica, Rio Grande do Sul, Brazil. The individuals were in good health and in their pubertal growth period. All had Class II division 1 malocclusion. The patients were divided into two groups: group 1 (22 subjects), Class II, with a normal transverse maxilla treated with cervical traction headgear (HG) 400 g 12 h/d, and group 2 (14 subjects), Class II maxillary transverse deficiency treated with rapid maxillary expansion plus cervical traction headgear (RME + HG). An additional group 3 (17 subjects) served as a control group and included individuals with the same characteristics. All subjects had two lateral cephalograms: initial (T1) and progress (T2), taken 6 months later. Differences between T1 and T2 were compared with the Student's t-test, and three groups were compared by the analysis of variance and Tukey multiple comparison test. Results: Results showed greater distal tipping and greater distal movement of the first permanent molars in group 1 (HG) than in group 2 (RME + HG), P < .05. No extrusion of first permanent molar occurred in either group (P > .05). Conclusion: The hypothesis was rejected. Cervical traction headgear alone produced greater distal movement effects in maxillary first permanent molars when compared with rapid maxillary expansion associated with cervical headgear.

Relationship between rapid maxillary expansion and nasal cavity size and airway resistance: Short- and long-term effects

2008 ◽  
Vol 134 (3) ◽  
pp. 370-382 ◽  
Author(s):  
Nanci Lara Oliveira De Felippe ◽  
Adriana C. Da Silveira ◽  
Grace Viana ◽  
Budi Kusnoto ◽  
Bonnie Smith ◽  
...  
Keyword(s):  
Nasal Cavity ◽  
Airway Resistance ◽  
Rapid Maxillary Expansion ◽  
Cavity Size ◽  
Long Term Effects ◽  
Maxillary Expansion ◽  
Short And Long Term

Rapid maxillary expansion. A study of the long-term effects

1996 ◽  
Vol 109 (4) ◽  
pp. 361-367 ◽  
Author(s):  
Paloma Velázquez ◽  
Elena Benito ◽  
Luis Alberto Bravo
Keyword(s):  
Rapid Maxillary Expansion ◽  
Long Term Effects ◽  
Maxillary Expansion

Soft Tissue Alterations Following Protraction Approaches with and without Rapid Maxillary Expansion

2014 ◽  
Vol 38 (3) ◽  
pp. 277-283 ◽  
Author(s):  
N Canigur Bavbek ◽  
B Balos Tuncer ◽  
T Tortop
Keyword(s):  
Soft Tissue ◽  
Rapid Maxillary Expansion ◽  
Chronological Age ◽  
Control Group ◽  
Class Iii ◽  
Maxillary Expansion ◽  
Upper Lip ◽  
Lateral Cephalograms ◽  
Tissue Changes ◽  
Soft Tissue Changes

The aim of this study was to compare the soft tissue changes influenced by reverse headgear therapy with (RHg+RME) or without (RHg) rapid maxillary expansion with each other and with an untreated Class III control group (C). Study design: RHg group (10 girls, 6 boys, mean chronological age 11.1 years), RHg+RME group (12 girls, 4 boys, mean chronological age 10.8 years) and C group (7 girls, 11 boys, mean chronological age 10.2 years) comprised skeletally Class III patients with maxillary deficiency. Soft tissue measurements were made on lateral cephalograms at the beginning and at the end of the treatment and observation periods. Changes within each group and the differences between the groups were analyzed by paired t-test; the differences between the groups were determined by variance analysis and Duncan test with a significance level p<0.05. Results: The sagittal depth of nose and maxilla, upper lip height and protrusion were significantly increased in treatment groups and the differences were significant when compared to control group (p<0.05). Conclusion: Forward movement of upper lip was more prominent in RHg group. Reverse headgear treatment with or without RME revealed significant soft tissue changes when compared with a growing Class III control group with the same skeletal characteristics.

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