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1.
Am J Orthod Dentofacial Orthop ; 159(3): 321-332, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33487499

RESUMO

INTRODUCTION: This study aimed to investigate the relative efficacy of maxillary protraction combined with a modified alternate rapid maxillary expansion and constriction (Alt-RAMEC) protocol compared with conventional protocols in the early orthopedic treatment of skeletal Class III malocclusion. METHODS: A sample of 39 patients was divided into 3 groups on the basis of different interventions. Conventional facemask (FM) with splint-type intraoral devices was performed in the FM group (7 males and 5 females; mean age, 9.53 ± 1.37 years). Maxillary expansion with an activation rate of 0.5 mm/d (twice a day) followed by FM therapy was applied in the rapid maxillary expansion group (RME/FM) (6 males and 6 females; mean age, 9.31 ± 1.60 years). In the Alt-RAMEC/FM group (7 males and 8 females; mean age, 10.01 ± 1.31 years), Alt-RAMEC was started simultaneously and throughout the entire course of maxillary protraction, with repetitive alternations between activation and deactivation of expanders (0.5 mm/d for 7 days). The patients in all groups were instructed to wear FMs for a minimum of 12 h/d. Pretreatment and posttreatment lateral cephalograms were all traced and measured. RESULTS: The Alt-RAMEC group showed statistically more significant maxillary advancement than other groups (A-VRP, 3.87 mm vs 3.04 mm [RME/FM], vs 2.04 mm [FM]; P <0.05). Analysis of variance did not reveal significant intergroup differences in palatal plane angulation changes (P >0.05). No pronounced mandibular clockwise rotations were noted in the Alt-RAMEC/FM group with distinct intergroup differences (P <0.05). There were more skeletal effects (88.7%) during overjet correction in the Alt-RAMEC/FM protocol. CONCLUSIONS: A combination of the modified Alt-RAMEC protocol with FM revealed more favorable skeletal effects compared with FM and RME/FM protocols in treating prepubertal patients with maxillary deficiency.


Assuntos
Má Oclusão de Angle Classe III , Técnica de Expansão Palatina , Cefalometria , Criança , Constrição , Aparelhos de Tração Extrabucal , Feminino , Humanos , Masculino , Má Oclusão de Angle Classe III/terapia , Máscaras , Maxila
2.
Eur J Paediatr Dent ; 21(4): 262-270, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33337900

RESUMO

AIM: The use of maxillary protraction appliances (MPAs) and Facemask (FM), with or without a rapid maxillary expansion (RME), have become a routine orthopaedic treatment procedure for the treatment of Class III in growing individuals; several authors have suggested that maxillary protraction could have a positive impact on airway dimensions. The purpose of this systematic review and meta-analysis was to assess the efficacy of maxillary protraction appliances (MPAs), with or without a rapid maxillary expansion (RME), on airway dimensions in children in mixed or early permanent dentition. MATERIALS AND METHODS: An electronic search was performed on PubMed, Medline, Scopus, The Cochrane Library, EMBASE and the System for Information on Grey Literature in Europe until November 30th, 2019. The Newcastle-Ottawa (NOS) scale was used to assess the studies' quality. Review Manager 5.3 (provided by the Cochrane Collaboration) was used to synthesize the effects on airway dimensions. RESULTS: After full text assessment, 8 studies were included in the qualitative and quantitative synthesis. NOS scores ranged 6 to 9 indicating high quality. The effects of two therapeutic protocols were compared, treatment with MPAs only (113 subjects treated - 65 controls) and the treatment with MPAs + RME (137 subjects treated- 87 controls). The MPAs only treatment group displayed a significantly increase in nasopharyngeal airway dimension at PNS-AD1 (random: mean difference, 1.39 mm, 95% CI, 0.32 mm, 2.47 mm, p= 0.01) and at PNS-AD2 (random: mean difference, 1.70 mm, 95% CI, 1.14 mm, 2.26 mm, p= 0.00001). No statistically significant changes were found post treatment in MPAs + RME treatment groups at PNS-AD1 (P= 0.15), PNS-AD2 (P= 0.17), McNamara's upper pharynx (MPAs + RME P= 0.05, MPAs P= 0.99) and McNamara lower pharynx (MPAs + RME P= 0.25, MPAs P= 0.40). CONCLUSION: MPAs only treatment can increase the pharyngeal thickness after treatment both at PNS-A1 and PNS-AD2. MPA+ RME had no effect on sagittal widths compared with controls, but the effect on the transverse dimension could not be assessed.


Assuntos
Má Oclusão de Angle Classe III , Técnica de Expansão Palatina , Cefalometria , Criança , Europa (Continente) , Aparelhos de Tração Extrabucal , Humanos , Maxila
3.
Eur J Paediatr Dent ; 21(4): 271-276, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33337901

RESUMO

AIM: The aim of the present prospective study was to evaluate if the treatment performed using high-pull traction on a Stephenson plate had real orthopaedic outcomes in subjects with severe Class II Division 1 malocclusion due to maxillary protrusion. MATERIALS AND METHODS: Twenty-three growing patients showing Class II Division 1 malocclusion (Stephenson plate group, SPG) were treated and compared with an untreated Class II control group (CG - 21 subjects selected from the database of Bolton-Brush Growth Study). Lateral cephalograms at T0 and T1 for both groups were analysed using cephalometric tracing by Jarabak, Pancherz and Ghosh-Nanda. RESULTS: Orthopaedic forces were applied in SPG. SPG group showed significantly greater decrease than CG group of SNA° (-1.4° vs +0.7°), ANB° (-1.3° vs +0°), WITS (-1° vs 0.6°), overjet (-4.1 mm vs +0.3 mm), molar relationships (-6.1° mm vs -0.1 mm) and upper incisors proclination (1/SpP, -10.3° vs -1°). The maxilla substantially maintained its position (A/OLp +0.3 mm, SNA° -1.4°) while the mandible slightly grew (Pg/OLp +1.7 mm; SNB° + 0.7°). Facial pattern and AFA/AFP ratio did not change. CONCLUSION: The high-pull traction on the Stephenson plate produced more dental than skeletal outcomes in growing subjects, despite of the application of orthopaedic forces.


Assuntos
Má Oclusão de Angle Classe II , Maxila , Cefalometria , Aparelhos de Tração Extrabucal , Humanos , Má Oclusão de Angle Classe II/terapia , Mandíbula , Estudos Prospectivos , Tração
4.
Orthod Fr ; 91(3): 239-248, 2020 10 01.
Artigo em Francês | MEDLINE | ID: mdl-33146618

RESUMO

The aim of our study was to evaluate the effect of treatment with a maxillary protraction appliance on the development of the craniofacial structures and to describe the correlation between the skeletal changes and the sagittal airway dimension associated with tongue, soft palate, and hyoid bone position in skeletal Class III children. A total of 40 patients with Class III malocclusions were evaluated by the use of lateral cephalograms. Pretreatment and posttreatment cephalometric radiographs were analyzed; linear and angular measurements were performed by the same orthodontist. The effect of treatment with a maxillary protraction appliance on the development of the craniofacial structures were evaluated by Student's T test and the correlation between treatment changes in craniofacial morphology and those in upper airway, tongue, soft palate, and hyoid position was evaluated by Pearson's correlation test. A significant increase in maxillary forward growth, inhibition of mandibular forward growth, and clockwise rotation of the mandible were observed. The statistical analysis revealed that maxillary growth had a significant positive effect on the superior upper airway sagittal dimension. The nasopharyngeal airway dimensions can be improved in the short term with maxillary protraction in skeletal Class III children.


Assuntos
Aparelhos de Tração Extrabucal , Má Oclusão de Angle Classe III , Cefalometria , Criança , Humanos , Má Oclusão de Angle Classe III/diagnóstico por imagem , Má Oclusão de Angle Classe III/terapia , Mandíbula , Maxila/diagnóstico por imagem , Faringe/diagnóstico por imagem
5.
J Orofac Orthop ; 81(6): 407-418, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32676721

RESUMO

PURPOSE: The aim of this retrospective study was to evaluate the skeletal, dental, and soft tissue effects of the alternating rapid maxillary expansions and constrictions (Alt-RAMEC) protocol combined with a facemask in prepubertal patients. METHODS: The study group (mean age 9.74 ± 1.46 years) consisted of 20 patients with class III malocclusion characterized by maxillary retrognathism. They were treated with a facemask for 7 months following a 9­week Alt-RAMEC protocol. Cone-beam computed tomography (CBCT) records and three-dimensional (3D) photographs taken before (T0) and after the protraction and retention period (T1) were evaluated. The study group was compared with a well-matched control group of 16 untreated patients (mean age 9.44 ± 0.79 years) with the same malocclusion. The records for the control group included cephalometric radiographs and 3D photographs. RESULTS: In the study group, significant forward movements of A point (3.49 mm), nasal (2.91 mm) and zygomatic bones were achieved. Intermolar, internasal, and interzygomatic widths increased. Soft tissue points followed the hard tissue movements, apart from b and pog. In the control group, A (0.97 mm), B (1.69 mm), Pog, and b points presented forward movement. Significant differences were found regarding the forward movement of the maxilla between the groups. CONCLUSION: The Alt-RAMEC/facemask protocol was effective not only in the maxillary region but also in the midface.


Assuntos
Aparelhos de Tração Extrabucal , Má Oclusão de Angle Classe III , Cefalometria , Criança , Humanos , Má Oclusão de Angle Classe III/diagnóstico por imagem , Má Oclusão de Angle Classe III/terapia , Maxila/diagnóstico por imagem , Técnica de Expansão Palatina , Estudos Retrospectivos
6.
Dental Press J Orthod ; 25(2): 25-31, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32490924

RESUMO

OBJECTIVE: Evaluate dental and skeletal changes resulting from the exclusive use of the cervical headgear for 15 ± 4 months in the treatment of patients with Class II division 1 malocclusion. METHODS: Differences between the beginning (T1) and immediately after the end of the therapy (T2) with the cervical headgear in growing patients (Experimental Group, EG, n = 23) were examined and compared, during compatible periods, with those presented by a group of untreated individuals (Control Group, CG, n =22) with similar malocclusions and chronological age. The cephalometric variables evaluated were: ANB, GoGn.SN, AO-BO, S'-ANS, S'-A, S'-B, S'-Pog and S'-U6 (maxillary first molar). The Shapiro-Wilk and Levene tests were used to evaluate the results. RESULTS: Significant differences were found relative to the ANB, S'-U6, AO-BO, S'-ANS, S'-A, S'-B and S'-Pog variables between T1 and T2 when comparing both groups. No statistically significant variation was found regarding the GoGn.SN angle. CONCLUSIONS: The use of cervical headgear promoted distal movement of the maxillary first molars and restricted the anterior displacement of the maxilla, without significantly affecting the GoGn.SN angle.


Assuntos
Má Oclusão de Angle Classe II , Cefalometria , Aparelhos de Tração Extrabucal , Humanos , Maxila , Dente Molar , Estudos Prospectivos
7.
J Evid Based Dent Pract ; 20(2): 101408, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32473799

RESUMO

ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: The effectiveness of Alt-RAMEC combined with maxillary protraction in the treatment of patients with a class III malocclusion: a systematic review and meta-analysis, Mohammed Almuzian, Elise McConnell, M. Ali Darendeliler, Fahad Alharbi & Hisham Mohammed. J Orthod 2018;45(4);250-9. SOURCE OF FUNDING: No financial support was reported. TYPE OF STUDY/DESIGN: Systematic review.


Assuntos
Má Oclusão de Angle Classe III , Técnica de Expansão Palatina , Constrição , Aparelhos de Tração Extrabucal , Humanos , Maxila
8.
Ortodoncia ; 84(167): 96-107, jun. 2020. ilus
Artigo em Espanhol | LILACS | ID: biblio-1147813

RESUMO

La maloclusión dentaria se encuentra en íntima relación con la postura del paciente y la dinámica funcional, la resolución de estos tres aspectos solo podrá ser efectiva y estable en el tiempo con un tratamiento de forma integral. Por lo tanto, a los objetivos ortodóncicos ­que hablan de: estética facial, estética dentaria, salud periodontal, estabilidad de la ATM, oclusión funcional, motivo de la consulta­ debemos agregar, estabilidad postural.


Assuntos
Humanos , Feminino , Criança , Adolescente , Postura , Má Oclusão , Cefalometria , Aparelhos de Tração Extrabucal , Má Oclusão/terapia , Respiração Bucal
9.
Prog Orthod ; 21(1): 11, 2020 May 04.
Artigo em Inglês | MEDLINE | ID: mdl-32363550

RESUMO

BACKGROUND: To compare dentoskeletal changes produced by the maxillary splint headgear and cervical headgear appliance during the early phase of Class II treatment, specially the initial overjet and upper incisors position. SUBJECTS AND METHODS: In this retrospective study, 28 Class II patients treated with the maxillary splint headgear (MSG, mean age 10.1 ± 1.9 years) and 28 Class II patients treated with cervical headgear (CHG, mean age 9.5 ± 1.9 years) were evaluated before and after treatment. Statistical comparisons between the two groups for cephalometric measurements at T1 and for T2-T1 changes were performed by means of independent sample t tests. RESULTS: The MSG showed a significantly greater reduction of the overjet in comparison to the CHG (- 2.4 mm and - 0.7 mm, respectively) and a significantly greater maxillary incisor uprighting (- 1.8 mm and 0.4 mm, respectively). In the MSG, overjet correction was due mainly to mandibular advancement (3.5 mm), while the correction of molar relationship (3.9 mm) was 64% skeletal and 36% dentoalveolar. In the CHG, the overjet correction was also more skeletal, due to mandibular growth (1.8 mm), while correction of molar relationship (3.5 mm) was 63% dentoalveolar and 37% skeletal. CONCLUSIONS: Both groups showed favorable skeletal mandibular changes, which was more significant in the MSG. Regarding tooth movement, the maxillary splint headgear was more effective in uprighting upper incisors and reducing the overjet than cervical headgear appliance.


Assuntos
Aparelhos de Tração Extrabucal , Má Oclusão de Angle Classe II , Cefalometria , Criança , Humanos , Maxila , Estudos Retrospectivos , Contenções , Técnicas de Movimentação Dentária
10.
Orthod Craniofac Res ; 23(4): 445-454, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32406170

RESUMO

OBJECTIVE: The aim of this study was to compare treatment outcomes with different maxillary protraction methods in patients with skeletal Class III malocclusion resulting from maxillary retrognathia. SETTING AND SAMPLE POPULATION: A total of 55 individuals consisting of 29 females and 26 males with a mean age of 11.4 ± 1.06 years were included in this study. MATERIAL AND METHODS: Fifty-five treated maxillary retrognathic patients who underwent different protraction facemask methods were evaluated. Eighteen patients treated with RME were in the first group, and 19 patients treated with a modified Alt-RAMEC protocol were in the second group; eighteen patients on whom face masks with miniplates were applied were included in the skeletal anchorage (SA) group. Thirty measurements were made on lateral cephalometric radiographs before and after treatment. Differences between the groups were assessed with the ANOVA test. RESULTS: The mean age was higher in the SA group (11.96 ± 0.92 years) compared with the other groups. The mean ANB angle increased by 2.96°, 4.91° and 3.86° in the RME, Alt-RAMEC and SA groups, respectively. The forward movement of the maxilla was similar between the groups. However, while the rate of protraction was higher in the modified Alt-RAMEC group, a greater skeletal effect was found in the SA group. CONCLUSION: The most effective method in terms of skeletal effect is the application of the face mask with skeletal anchorage; the modified Alt-RAMEC protocol can be applied before face mask to obtain faster protraction.


Assuntos
Má Oclusão de Angle Classe III , Maxila , Cefalometria , Criança , Aparelhos de Tração Extrabucal , Feminino , Humanos , Masculino , Má Oclusão de Angle Classe III/diagnóstico por imagem , Má Oclusão de Angle Classe III/terapia , Técnica de Expansão Palatina
11.
J Orofac Orthop ; 81(3): 209-219, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32342120

RESUMO

PURPOSE: The aim of this study was to evaluate the hard and soft tissue effects and differences of the Alt-RAMEC protocol to the facemask and conventional facemask protocols in patients with unilateral cleft lip and palate. METHODS: This prospective study was carried out with 30 patients with unilateral cleft lip and palate with skeletal and dental class III malocclusions who were referred to a university department of orthodontics. The patients were evaluated with the cervical vertebral maturation method and divided into two groups, each consisting of 15 patients. The patients in group I (mean age 10.00 ± 0.73 years) were treated according to conventional facemask protocol, and the patients in group II (mean age 10.07 ± 2.43 years) were treated according to the Alt-RAMEC protocol before facemask application. Lateral cephalometric radiographs were evaluated by using the Dolphin Imaging Software version 11.7. The skeletal, dentoalveolar and soft tissue differences and treatment times were evaluated. RESULTS: Group II demonstrated a 5.73° increase in SNA, which was statistically significant, while this increase was 3.13° in group I (p < 0.001). Results for Co­A and A­PTV showed a significant increase for group II only (group I: 1.02 mm, 1.06 mm, group II: 3.02 mm, 2.21 mm; p < 0.05 and p < 0.01, respectively). In addition, group II presented significant increase for the values of ANB, N­A-Pg, SN/MP, Wits, U1-SN, U1-L1, U1-PTV, U1-FHP, U6-PTV, U6-FHP, overjet, Ss-PTV, UL-PTV and UL­S line (p < 0.001). The treatment mean times were 7.3 months in group I and 4.7 months in group II (p < 0.01). CONCLUSION: Applying the facemask after having followed the Alt-RAMEC protocol induced more skeletal, dentoalveolar and soft tissue changes in comparison to the conventional facemask protocol in patients with unilateral cleft lip and palate.


Assuntos
Fenda Labial , Fissura Palatina , Má Oclusão de Angle Classe III , Cefalometria , Criança , Aparelhos de Tração Extrabucal , Humanos , Maxila , Técnica de Expansão Palatina , Estudos Prospectivos
12.
J Orthod ; 47(2): 170-180, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32166995

RESUMO

The aim of this article is to report a case series of a miniscrew-anchored maxillary protraction therapy (MAMP). Two male patients presenting with Class III malocclusion were included in this report. The treatment consisted of a hybrid expander and two miniscrews at the anterior region of the mandible anchoring Class III elastics for maxillary protraction. Effective maxillary length, ANB angle and Wits appraisal increased after treatment. Slight dental effects were observed. MAMP therapy produced substantial skeletal effects and might be a good treatment option for Class III growing patients.


Assuntos
Má Oclusão de Angle Classe III , Técnica de Expansão Palatina , Cefalometria , Aparelhos de Tração Extrabucal , Humanos , Masculino , Mandíbula , Maxila
13.
J Indian Soc Pedod Prev Dent ; 38(1): 88-90, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32174635

RESUMO

One of the most common clinical challenges encountered with facemask therapy for early correction of skeletal Class III malocclusions is the delivery of appropriate direction of force for effecting the pure translation of maxilla. This technical note describes a novel method involving the use of Begg's auxiliary for achieving efficient and predictable delivery of protraction forces. With this modified assembly, effective vector control for facemask can be achieved without the need to remove the bonded Hyrax assembly. This chairside modification is an effective and invaluable method for predictable force delivery in facemask therapy.


Assuntos
Má Oclusão de Angle Classe III , Técnica de Expansão Palatina , Cefalometria , Aparelhos de Tração Extrabucal , Humanos , Maxila
14.
Medicentro (Villa Clara) ; 24(1): 207-216, ene.-mar. 2020. graf
Artigo em Espanhol | LILACS | ID: biblio-1091087

RESUMO

RESUMEN Los pacientes con hipoplasia anteroposterior del maxilar superior deben ser detectados durante la atención odontológica temprana, o sea, cuando todavía están en período de crecimiento, con la finalidad de poder inducir cambios de tipo alveolar, esqueléticos y estéticos. La paciente tenía 12 años de edad, contaba con potencial remanente de crecimiento y presentaba Síndrome de Clase III esqueletal, por retrusión del maxilar superior. La caracterizaba una mandíbula de tamaño normal y una mordida cruzada anterior; en su tratamiento se utilizó la máscara facial ortopédica de Petit, para la tracción anterior del maxilar, y el tornillo Hyrax, para la expansión dentoalveolar. Estos instrumentos se emplearon con el fin de corregir la mordida cruzada posterior simple del lado izquierdo. Se observaron resultados satisfactorios desde el punto de vista esqueletal, oclusal, faciales y del perfil.


ABSTRAC Patients with anteroposterior hypoplasia of the upper jaw should be detected during early dental care, that is, when they are still growing, in order to be able to induce alveolar, skeletal and aesthetic changes. The patient was 12 years old, had residual growth potential and presented skeletal Class III Syndrome due to retrusion of the upper jaw. She was characterized by a normal sized jaw and an anterior crossbite; a Petit orthopedic face mask was used as a treatment for anterior maxillary traction and a Hyrax screw for dentoalveolar expansion. These instruments were used in order to correct the simple posterior crossbite on the left side. Satisfactory results were observed from the skeletal, occlusal, facial and profile points of view.


Assuntos
Má Oclusão de Angle Classe III , Aparelhos de Tração Extrabucal
15.
Hua Xi Kou Qiang Yi Xue Za Zhi ; 38(1): 69-74, 2020 Feb 01.
Artigo em Chinês | MEDLINE | ID: mdl-32037769

RESUMO

OBJECTIVE: To assess the efficacy of bone anchorage and maxillary facemask protraction devices in treating skeletal class Ⅲ malocclusion in adolescents. METHODS: Articles relating to the use of bone anchorage and maxillary facemask protraction devices for treating skeletal class Ⅲ malocclusion in adolescents were searched from the databases of Cochrane Library, PubMed, EmBase, CNKI, and Wanfang database. Several inclusion and exclusion criteria were developed for the article screening. The clinical data were extracted, and the quality of the selected articles was evaluated. A Meta-analysis of SNA, SNB, ANB, ANS-Me, Wits, and U1-PP change was performed by using RevMan 5.3. RESULTS: Seven studies (264 patients) were included in the Meta-analysis. Among these studies, three were randomized controlled trials, and four were non-randomized controlled trials. Compared with the maxillary facemask protraction device group, the bone ancho-rage device group had higher SNA changes and lower ANS-Me, Wits, and U1-PP changes (P<0.05). No significant differences were observed in the SNB and ANB changes between these two groups. CONCLUSIONS: Compared with the maxillary facemask protraction device, the bone anchorage device can increase the extent of protraction of the maxilla and has better controls for the labial inclination of the maxillary anterior teeth in treating skeletal class Ⅲ malocclusion among adolescents. However, additional high-quality randomized controlled trials must be performed to verify the results.


Assuntos
Má Oclusão de Angle Classe III , Maxila , Adolescente , Cefalometria , Aparelhos de Tração Extrabucal , Humanos , Técnica de Expansão Palatina , Ensaios Clínicos Controlados Aleatórios como Assunto
16.
J Orofac Orthop ; 81(3): 172-182, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32107567

RESUMO

INTRODUCTION: The aim of this study was to compare banded versus modified appliances for anchorage during maxillary protraction in Class III malocclusions. PATIENTS AND METHODS: The sample size consisted of 40 growing patients with Class III maxillary deficiency: 20 patients received maxillary protraction with a modified appliance and 20 patients with a banded appliance. Pre- and posttreatment cephalometric radiographs of all subjects were obtained and analyzed. The paired t­test and Wilcoxon ranks test were used for statistical analysis. RESULTS: The patients in the modified appliance group needed fewer appointments and shorter treatment time than those in the banded appliance group. The modified appliance was superior to the banded appliance with respect to simple structure, comfort, retention, and convenience in maintaining oral hygiene. The modified appliance was as effective as the banded appliance in correcting the Class III malocclusion. However, a greater increase was found in mandibular plane angle, anterior facial height, total facial height, mesialization of maxillary molars, and proclination of maxillary incisors in the banded appliance group compared with that in the modified appliance group (P < 0.05). CONCLUSIONS: The newly developed modified appliance may be a promising approach in treating growing Class III patients with maxillary deficiency, which could decrease treatment time, increase treatment efficiency, and reduce anchorage loss.


Assuntos
Má Oclusão de Angle Classe III , Desenho de Aparelho Ortodôntico , Cefalometria , Aparelhos de Tração Extrabucal , Humanos , Maxila , Dente Molar
17.
Rev. ADM ; 77(1): 41-45, ene.-feb. 2020. ilus
Artigo em Espanhol | LILACS | ID: biblio-1088066

RESUMO

Introducción: La maloclusión clase III es considerada como severa y en la mayoría de los pacientes la etiología suele estar combinada entre componentes esqueléticos y dentoalveolares. Las posibilidades terapéuticas dependerán de la edad biológica del paciente y del tipo de maloclusión. Conforme va aumentando la edad del paciente va menguando la capacidad de crecimiento y se va asentando la relación de clase III esquelética. Las maloclusiones de clase III esqueléticas se pueden corregir mediante extracciones dentales y cirugía ortognática. Caso clínico: Paciente masculino de 13 años de edad con protrusión mandibular, discrepancia óseo dentaria negativa, convexidad facial disminuida y clase III dental y esqueletal. Resultados: Se resolvió la discrepancia óseo dentaria negativa del paciente, se logró la clase I Molar y canina con una sobremordida adecuada (AU)


Introduction: Class III malocclusion is considered severe and in most patients the etiology is usually combined between skeletal and dentoalveolar components. The therapeutic possibilities depend on the biological age of the patient and the type of malocclusion. As it increases the age of the patient wanes growth capacity and Will settled the relationship skeletal class III. The skeletal class III malocclusion can be corrected by tooth extractions and orthognathic surgery. Case report: Male patient 13 years old with mandibular protrusion, negative tooth bone discrepancy, decreased facial convexity and dental and skeletal class III. Results: Dental patient refusal bone discrepancy was resolved, I molar and canine class and adequate overbite was achieved (AU)


Assuntos
Humanos , Masculino , Adolescente , Técnica de Expansão Palatina , Aparelhos de Tração Extrabucal , Aparelhos Ortodônticos Fixos , Má Oclusão de Angle Classe III/terapia , Planejamento de Assistência ao Paciente , Extração Dentária , Fechamento de Espaço Ortodôntico
18.
Eur J Orthod ; 42(2): 174-179, 2020 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-31971997

RESUMO

BACKGROUND: Empiric data on headgear wear are scarce. The aim was to examine a possible discrepancy between the duration of wearing and force application, and whether such a difference is influenced by force level or direction of traction. MATERIALS AND METHODS: In this retrospective analysis, 122 consecutive patients were included. All were treated with headgear (three subgroups: high-pull headgear [n = 60], cervical-pull headgear [n = 32], and high-pull headgear in combination with an activator [n = 30]) and were monitored for three successive months using an electronic module. The device recorded chronographically the measured force magnitude and temperature, allowing to differentiate between the duration of headgear wear (recorded body temperature) and actual force application (recorded force). RESULTS: For all subgroups, the average recorded force application was lower than wear time (mean inactivity during wear: 15.9 ± 22.8 minutes/night). The direction of traction significantly influenced the extent and length of wear time without force application (P < 0.001): patients with cervical-pull headgear were more prone to inactive wear time (27.7 minutes/night) than patients with high-pull headgear (13.7 minutes/night) or with headgear-activator (7.8 minutes/night). The observed inter-individual variability of inactive wear time was considerable (0-134 minutes/night). The mean applied force was highly significantly associated with inactive wear time (correlation coefficient: -0.575; P < 0.001), and force levels below 250 g seem particularly related to episodes of inactivity. CONCLUSIONS: There is a clear incongruity between the duration of headgear wear and the duration of force application. Inactive wear time is influenced by the direction of traction and force level applied. Clinicians should be aware of the likelihood of periods of inactive wear time and researchers should search for options to reduce or even eliminate these periods.


Assuntos
Aparelhos de Tração Extrabucal , Tração , Humanos , Estudos Retrospectivos , Temperatura
19.
Eur J Orthod ; 42(2): 193-199, 2020 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-31750516

RESUMO

OBJECTIVES: The purpose of this study was to compare the results of skeletal anchorage (SAMP) and tooth- borne (TBMP) maxillary protraction followed by fixed appliance in growing skeletal Class III patients. MATERIALS AND METHODS: Patients treated with maxillary protraction were selected and classified into two groups (SAMP: n = 19, mean age = 11.19 years; TBMP: n = 27, mean age = 11.21 years). Lateral cephalograms taken before treatment (T0), after the maxillary protraction (T1), and after the fixed appliance treatment (T2) were analysed and all variables were statistically tested to find difference between the two groups. RESULTS: Compared to the TBMP, the SAMP showed significant forward growth of maxilla (Co-A point and SN-Orbitale) and improvement in intermaxillary relationship (ANB, AB to mandible plane, and APDI) after the overall treatment (T0-T2), with no significant sagittal changes in maxilla or mandible throughout the fixed appliance treatment (T1-T2). LIMITATIONS: In maxillary protraction, effects of skeletal anchorage were retrospectively compared with those of dental anchorage, not with Class I or III control. CONCLUSIONS AND IMPLICATIONS: After maxillary protraction, skeletal and tooth-borne anchorage did not cause significant differences in the residual growth of maxilla throughout the phase II treatment. Orthopaedic effects with skeletal anchorage showed appropriate stability in maxilla and intermaxillary relationship even after fixed appliance treatment.


Assuntos
Má Oclusão de Angle Classe III/terapia , Procedimentos de Ancoragem Ortodôntica , Cefalometria , Aparelhos de Tração Extrabucal , Humanos , Mandíbula , Maxila , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos Fixos , Técnica de Expansão Palatina , Estudos Retrospectivos
20.
Int J Pediatr Otorhinolaryngol ; 130: 109794, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31812840

RESUMO

OBJECTIVE: The aim of this investigation was to analyze the effects of RME and FM on the airway dimensions in Class III patients compared with untreated controls. METHODS: A sample of 47 Class III patients treated with RME and FM was analyzed. The treated group was compared with 18 untreated controls. Lateral cephalograms for each patient at T1, T2, and T3 were digitized. RESULTS: At long-term evaluation a significant increase in airway size and a significant decrease in adenoid size were found in the treated group as well as an improvement in the pharynx dimension. During active treatment the treated group showed a significant improvement in lower airway size and in lower pharynx dimension. A significant decrease in adenoid size was also found. CONCLUSION: The treatment with RME and FM produced favorable stable changes in the airway dimensions in Class III subjects when compared with untreated controls.


Assuntos
Aparelhos de Tração Extrabucal , Má Oclusão de Angle Classe III/patologia , Má Oclusão de Angle Classe III/terapia , Máscaras , Técnica de Expansão Palatina , Faringe/patologia , Fatores Etários , Cefalometria , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Estudos Retrospectivos
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