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1.
Sensors (Basel) ; 21(5)2021 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-33799930

RESUMO

BACKGROUND: In the dental field, digital technology has created new opportunities for orthodontists to integrate their clinical practice, and for patients to collect information about orthodontics and their treatment, which is called "teledentistry." Dental monitoring (DM) is a recently introduced orthodontic application that combines safe teledentistry with artificial intelligence (AI) using a knowledge-based algorithm, allowing an accurate semi-automatic monitoring of the treatment. Dental Monitoring is the world's first SaaS (Software as a Service) application designed for remote monitoring of dental treatment, developed in Paris, France, with Philippe Salah as the Co-founder and CEO. CASES PRESENTATION: This report describes two cases in which DM system was essential to achieve the control of certain movements: it was possible to follow the movement, even if complex, such as the anterior cross of an adult patient and a lack of space in the canine of the growing patient. The software analyzed the fit and retention of the aligner, thus ensuring correct biomechanics. They were treated during the COVID-19 pandemic lockdown with aligners. The first case is a growing patient who was monitored during an interceptive orthodontic treatment to manage a retained upper canine. The second case is an adult patient forced to finalize his treatment of upper lateral incisor crossbite. The software analyzed the fit and retention of the aligner, thus ensuring correct biomechanics. CONCLUSIONS: DM system appears to be a promising method, useful for improving the interaction between doctor and patient, generally acceptable and useful to patients, even in critical clinical situations, at least in cases with optimal compliance and ability to use the tool properly.


Assuntos
Inteligência Artificial , Desenho de Aparelho Ortodôntico , Software , Telemedicina , Técnicas de Movimentação Dentária , Adulto , Controle de Doenças Transmissíveis , França , Humanos , Pandemias
2.
Eur J Paediatr Dent ; 22(1): 35-40, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33719481

RESUMO

BACKGROUND: The aim of this paper is to illustrate the use of a modified vertical holding appliance (G-VHA) to obtain the vertical control of maxillary molars and tongue stimulation in order to achieve a transverse activation in growing patients with dental open bite without the patient's compliance. CASE REPORTS: The G-VHA is a modified trans-palatal bar with a resin pad covering the Omega central loop and two adjunctive lateral loops to ensure the bar flexibility. The G-VHA is designed to direct the force of the tongue against the upper molars to generate intrusion and at the same time to stimulate and re-educate the tongue. Two cases of dental open bite in growing patients are illustrated. Both patients were successfully treated, and the open bite was fully corrected thanks to molar intrusion, following counterclockwise rotation of the mandible and tongue correction. Finishing of alignment was performed in phase II of the treatment with conventional appliances. CONCLUSION: The G-VHA proved to be effective in controlling the vertical position of maxillary molars promoting the counter-clockwise rotation of the mandible and stimulating a different tongue posture.


Assuntos
Mordida Aberta , Cefalometria , Humanos , Mandíbula , Dente Molar , Mordida Aberta/terapia , Desenho de Aparelho Ortodôntico , Técnicas de Movimentação Dentária
3.
Prog Orthod ; 22(1): 9, 2021 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-33748887

RESUMO

BACKGROUND: The mechanical strength of mini-implants is a critical factor due to their small diameters. Currently, it is not possible to state whether there is a relevant difference between the mechanical properties of stainless steel (SS-MIs) and titanium alloy mini-implants (TA-MIs). The objective of this study was to test the null hypothesis that there is no difference in the mechanical strength of SS-MIs and TA-MIs, and to analyze, by scanning electron microscopy (SEM), the SS-MI, and TA-MI threads resistance to morphological damage after insertion. METHODS: A standardized sample of 504 SS-MIs and TA-MIs with diameters ranging from 1.2 mm to 1.8 mm was used. Torsional fracture was performed in 154 MIs. Flexural strength of 280 MIs was evaluated at 1 mm and 2 mm-deflection. The threads of 70 MIs were morphologically analyzed by scanning electron microscopy (SEM), before and after their insertion in high-density artificial bone blocks. Comparisons between SS-MIs and TA-MIs were performed with t tests or Mann-Whitney U tests. A multiple linear regression analysis was used to evaluate the influence of variables on the ranging of MI mechanical strength. RESULTS: SS-MIs had higher fracture torque. The mean difference between the SS-MIs and TA-MIs fracture torque was of 4.09 Ncm. The MI diameter explained 90.3% of the total variation in fracture torque, while only 2.2% was explained by the metallic alloy. The SS-MI group presented a higher deformation force during the 1mm and 2mm-deflection. The mean difference between the flexural strength of SS and TA-MIs at 1 mm and 2 mm-deflection was of 18.21 N and 17.55 N, respectively. There was no noticeable morphological damage to the threads of SS-MIs and TA-MIs. CONCLUSIONS: The null hypothesis was rejected. SS-MIs were 13.2% and 20.2% more resistant to torsional fracture and deflection, respectively. The threads of the SS-MIs and TA-MIs were not damaged during the insertion and removal process. Thus, the use of SS-MI can reduce the fracture risk without increasing the MI diameter.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Aço Inoxidável , Ligas , Humanos , Laboratórios , Teste de Materiais , Desenho de Aparelho Ortodôntico , Estresse Mecânico , Titânio , Torque
4.
Am J Orthod Dentofacial Orthop ; 159(3): e275-e280, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33518439

RESUMO

INTRODUCTION: The purpose of this study was to compare predicted anterior teeth intrusion measurements with the actual clinical intrusion measurements using cone-beam computed tomography. Understanding the precision of the software in anticipating changes may help practitioners predict the need for overcorrection. METHODS: Twenty-two patients, with a mean age of 23.74 years, who underwent Invisalign (Align Technology, Santa Clara, Calif) clear aligners treatment for both arches only after having completed treatment with an initial series of aligners were included in this study. The pretreatment and posttreatment cone-beam computed tomography scans after the initial series were acquired by a single orthodontist practitioner. ClinCheck measurements were recorded with Align Technology. The long axis of the anterior tooth intrusion movement was measured in 142 teeth. A comparison between the predicted and actual measurements of anterior intrusion of the teeth was performed, and the intraclass correlation coefficients showed an almost perfect agreement in the linear measurements. RESULTS: A statistically notable difference between the predicted and actual measurements of anterior intrusion. The predicted intrusion movement of the maxillary canines (P = 0.001), maxillary lateral incisors (P <0.0001), and maxillary central incisors (P <0.0001) significantly differed from the actual values. Similarly, the intrusion movement in the mandibular teeth seemed to be inaccurate, with significant differences in the mandibular canines (P <0.0001) and mandibular lateral and central incisors (P <0.0001). CONCLUSIONS: The mean precision of true anterior intrusion with Invisalign clear aligners was 51.19%, and the mean amount of correction was 48.81%. The use of other supplementary methods of anterior teeth intrusion may be helpful to reduce the rate of midcourse corrections and refinements.


Assuntos
Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos Removíveis , Adulto , Tomografia Computadorizada de Feixe Cônico , Humanos , Incisivo/diagnóstico por imagem , Técnicas de Movimentação Dentária , Adulto Jovem
5.
Am J Orthod Dentofacial Orthop ; 159(4): 470-479, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33558030

RESUMO

INTRODUCTION: The aims of this study were to evaluate the long-term skeletodental effects, the volume of maxillary tuberosity, and airway space changes after maxillary molar distalization using modified C-palatal plate (MCPP) in adolescents with Class II malocclusion. METHODS: The sample consisted of 20 adolescent patients (MCPP group; mean age, 12.9 ± 1.0 year) who underwent bilateral distalization of their maxillary dentition and 20 subjects as a control group. In the MCPP group, cone-beam computed tomography images were taken before distalization, at the end of the treatment, and during retention with a minimum of a 3-year posttreatment follow up period. Repeated measures ANOVA followed by post-hoc analysis with the Bonferroni test were used to identify significant differences between time points. RESULTS: After the long-term observation period, sagittal skeletal and dental relationships were maintained (there were no significant changes in ANB, occlusal plane angle, and overjet postretention). The vertical skeletal dimension did not change during treatment and was stable at the long-term follow-up (the mandibular plane angle and ANS-Me were relatively well maintained). The volume of the maxillary tuberosity showed no significant change during long-term retention. However, the volume was significantly smaller in the treatment group than in the control group (P <0.0001). There were no significant airway space changes after distalization and the postretention period. In addition, there was no significant difference between the MCPP and control groups. CONCLUSIONS: Improved sagittal skeletal and dental relationships because of treatment were maintained in the long-term evaluation. There was no negative long-term effect on airway space associated with the maxillary arch distalization. Therefore, these findings might be beneficial for clinicians in diagnosis and treatment planning for Class II malocclusion in adolescents.


Assuntos
Má Oclusão de Angle Classe II , Técnicas de Movimentação Dentária , Adolescente , Cefalometria , Criança , Tomografia Computadorizada de Feixe Cônico , Humanos , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/terapia , Maxila/diagnóstico por imagem , Desenho de Aparelho Ortodôntico
6.
Am J Orthod Dentofacial Orthop ; 159(4): e363-e375, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33573898

RESUMO

INTRODUCTION: Rapid palatal expansion is a common therapy during orthodontic treatment and could be a preliminary step for correcting different malocclusions; furthermore, this treatment could be necessary at any age. Different anchorage approaches have been proposed to obtain an effective skeletal result, although every device produces both dental and skeletal effects. This study aimed to compare the dentoskeletal effects of a bone-borne palatal expander considering 2 groups of patients of different ages. METHODS: Twenty-four patients consecutively treated were included in the study; patients were divided into 2 groups according to their age: group 1 with age ≤16 years and group 2 patients >16 years. All patients had a preexpansion cone-beam computed tomography scan; a second scan was required at the end of activations. All patients received a bone-borne appliance anchored on 4 miniscrews. RESULTS: Significant intragroup differences were found for maxillary width and dental diameters. No significant differences were found between groups with regard to longitudinal changes, except for the maxillary right plane. CONCLUSIONS: The use of bone-borne maxillary expansion was effective in generating palatal widening both in growing and young adult patients. No significant skeletal or dental differences were found between groups.


Assuntos
Má Oclusão , Técnica de Expansão Palatina , Adolescente , Tomografia Computadorizada de Feixe Cônico , Humanos , Má Oclusão/diagnóstico por imagem , Má Oclusão/terapia , Maxila/diagnóstico por imagem , Desenho de Aparelho Ortodôntico , Adulto Jovem
7.
Prog Orthod ; 22(1): 3, 2021 Jan 18.
Artigo em Inglês | MEDLINE | ID: mdl-33458787

RESUMO

BACKGROUND: Patient quality of life (QoL) during orthodontic treatment is an important consideration that requires greater academic investigation as greater focus is placed on enhancing patient experience. Quality of life (QoL) was assessed in three orthodontic appliance groups, i.e., vestibular, lingual, and aligners during the initial stages of treatment. The sample was comprised of 117 adult patient-subjects distributed into 3 groups: vestibular (n = 41), lingual (n = 37), and aligner (n = 39). A WHOQOL-BREF questionnaire surveyed four domains (physical health, psychological health, social relationships, and environment). RESULTS: Mean scores for domain 1, physical health, showed that the aligner group (28.1) had significantly greater scores than that of the vestibular (22.7) or lingual (22) groups. Domain 2, psychological health, demonstrated significant differences (P < 0.001) between all groups, with the aligner group scoring the highest (23.2), followed by the lingual (18.4) and vestibular (15.2) groups. Domain 3, social relationship, showed that aligner (10.9) and lingual (10.2) scores were significantly greater (P < 0.001) than those of the vestibular group (7.8). Domain 4, environment, displayed significant differences between all groups, with the aligner group scoring highest (32.1), followed by the lingual group (29.3), and lastly the vestibular group (26.4). Overall, the highest mean score was obtained by the aligner group (23.1) and the lowest mean score was by the vestibular group (18). The mean domain scores for all three groups were significantly different (P ≤ 0.005) from each other (Table 2). CONCLUSIONS: Overall, patients undergoing Aligner therapy reported the overall highest QoL scores, followed by lingual and vestibular groups.


Assuntos
Aparelhos Ortodônticos , Qualidade de Vida , Adulto , Humanos , Desenho de Aparelho Ortodôntico , Inquéritos e Questionários
8.
J Esthet Restor Dent ; 33(1): 253-258, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33410248

RESUMO

Orthodontics as well as dentistry are undergoing a technological revolution with advances in medical imaging, 3D printing and customization of appliances and devices. Digital orthodontics can be defined as the process of manufacturing customized appliances based on a target setup which incorporates tooth positioning in six-degrees-of-freedom. Three-dimensional medical imaging provides better diagnostic tools and allows for fabrication of orthodontic appliances based on the coordinates system of the occlusal plane within the facial anatomy. This article describes the state-of-the-art in goal-driven orthodontic treatment, warns against the commercialization of our profession, and highlights the advantages of lingual orthodontics in terms of protection of the enamel.


Assuntos
Ortodontia , Imageamento Tridimensional , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Impressão Tridimensional
9.
Orthod Craniofac Res ; 24 Suppl 1: 103-112, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33484608

RESUMO

OBJECTIVES: The aim of this systematic review is to assess the treatment effects (amount of distalization, distal tipping and vertical movement) of buccally versus palatally placed temporary skeletal anchorage devices (TSADs) on maxillary first molars during distalization. MATERIALS AND METHODS: Medline and Scopus databases were searched up to September 2020 for randomized controlled trials (RCTs) and non-randomized prospective cohort studies on maxillary molar distalization using TSADs in patients with Class II malocclusion. After study selection, data extraction and risk of bias assessment, meta-analyses were performed for the amount of distalization, distal tipping and intrusion of first molars. RESULTS: Nine studies (2 RCTs and 7 prospective studies) were included. The risk of bias of the RCTs was low to unclear. The non-randomized studies were of moderate quality. In five studies, the TSADs were placed in the infrazygomatic process while in two studies, they were placed in the buccal inter-radicular spaces, and in two studies, they were placed in the midpalatal region. The first molar distalization was 2.75 mm when buccal inter-radicular TSADs were used, but 4.07 and 4.17 mm with palatal and infrazgomatic TSADs. The palatal appliances were associated with 11.17° of distal tipping of the first molar while infrazygomatic and buccal inter-radicular TSADs resulted in 3.99° and 1.70° of tipping, respectively. CONCLUSIONS: Inter-radicular TSADs resulted in less distal tipping but also in less distalization. Palatal TSAD-supported appliances showed the greatest amount of distal tipping. Further RCTs or prospective studies on the effect of various designs of TSAD-supported distalization are warranted.


Assuntos
Má Oclusão de Angle Classe II , Procedimentos de Ancoragem Ortodôntica , Cefalometria , Humanos , Maxila , Dente Molar , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Técnicas de Movimentação Dentária
10.
Angle Orthod ; 91(2): 149-156, 2021 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-33434285

RESUMO

OBJECTIVES: To determine dentoalveolar and skeletal effects produced in mature patients by the Carriere Motion Class III (CM3) appliance followed by fixed appliances. MATERIALS AND METHODS: This retrospective study evaluated 32 patients at three time points: T1 (initial), T2 (removal of CM3), and T3 (posttreatment). Serial cephalograms were traced and digitized, and best-fit regional superimpositions were constructed. Eleven linear and 7 angular variables were measured. The starting forms of the CM3 patients were compared with a sample of untreated subjects with normal occlusions and well-balanced faces. RESULTS: The CM3 phase lasted 6.3 months, followed by a phase of fixed appliances lasting 12.9 months; the total duration of treatment was 19.2 months. Minimal skeletal changes were measured sagittally, with only a slight increase in lower anterior facial height observed during treatment. Most treatment changes were dentoalveolar in nature. Wits appraisal increased 4.0 mm during treatment. The molar relationship improved by 6.0 mm during phase I, a value that rebounded slightly during phase II, resulting in an improvement toward Class I of 4.8 mm. Best-fit regional superimpositions revealed anterior movement of upper molars relative to the maxilla and posterior movement of lower molars relative to the mandible. CONCLUSIONS: The Carriere Motion Class III appliance is an effective and efficient method of resolving occlusal problems in minimally growing Class III patients. Primary treatment effects are dentoalveolar in nature with minimal skeletal alterations.


Assuntos
Má Oclusão de Angle Classe II , Aparelhos Ortodônticos Funcionais , Adolescente , Adulto , Cefalometria , Humanos , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/terapia , Mandíbula , Maxila , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos Fixos , Estudos Retrospectivos
12.
Prog Orthod ; 22(1): 2, 2021 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-33409700

RESUMO

BACKGROUND: The aim of this study was to investigate the effect of surface roughening and acid etching on clinical success rate and removal and insertion torque of orthodontic miniscrews. MATERIALS AND METHODS: Sixty-two orthodontic miniscrews (Jail Medical Corporation, Seoul, Korea) with the same design and dimensions (10-mm length, 2-mm diameter) are divided into two (sandblasted and acid-etched versus control) groups. The sample of the study was 31 patients whose miniscrews were needed for en masse retraction of the upper six anterior teeth. In this split-mouth study, the miniscrews were placed in the attached gingiva between the second premolar and the first molar. The side (left or right) was selected randomly. The miniscrews were loaded 6 weeks after insertion, and the patients were followed up after 3, 6, 10, 14, and 18 weeks and then for 4 weeks interval. Chi-square, correlation, and independent t tests were done using SPSS ver24 to interpret the data. RESULTS: The survival rate was 90.3% and 83.9% for the sandblasted and acid-etched versus the control group, respectively. The difference in survival rate was not statistically significant (p > 0.05). Removal torque was higher for the sandblasted group (p < 0.05). Younger patients showed less survival rate (p < 0.05) in both groups. Insertion side, namely, left or right, was not statistically significant. CONCLUSIONS: Although sandblasting increased removal torque, it did not influence the survival rate of orthodontic miniscrews significantly.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Parafusos Ósseos , Humanos , Boca , Desenho de Aparelho Ortodôntico , Taxa de Sobrevida , Torque
13.
Angle Orthod ; 91(1): 22-29, 2021 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-33339047

RESUMO

OBJECTIVES: To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. MATERIALS AND METHODS: The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. RESULTS: The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P < .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P < .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. CONCLUSIONS: The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.


Assuntos
Má Oclusão de Angle Classe II , Desenho de Aparelho Ortodôntico , Adolescente , Cefalometria , Feminino , Humanos , Masculino , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/terapia , Maxila , Técnicas de Movimentação Dentária
14.
Dental press j. orthod. (Impr.) ; 26(1): e2119248, 2021. tab, graf
Artigo em Inglês | LILACS-Express | LILACS, BBO - Odontologia | ID: biblio-1154063

RESUMO

ABSTRACT Objective: The aim of this study was to compare three teaching methods' time and personnel requirements, and their effects on plaque and gingival indices. Methods: This study was a single-blind randomized controlled trial on fixed orthodontic appliance candidates (n = 90), assigned into a control group (n = 30) and two different study groups (n = 30 each). The control group received standard printed educational material and was assisted with verbal information. The study groups either received video-assisted or hands-on training about fixed orthodontic appliance and oral hygiene. The time requirements for all three educational interventions was recorded during the initial visit. The adequacy of oral hygiene was documented through plaque and gingival indices during the initial visit and eighth week of the treatment. The continuous variables were analyzed using 1-way ANOVA. Tukey HSD and Student t-tests were used for post-hoc comparisons (α?#8197;= 0.05). Also, a chi-square test was used for the analysis of categorical variables. Results: Standard education failed to maintain the plaque and gingival indices at the eighth week of the treatment. Although both video-assisted and hands-on training took a considerable amount of time, they served well in preserving both of the indices at the eighth week. The longer the educational intervention was, the better the preservation of the plaque and gingival indices. Conclusion: Educational intervention, either with video-assisted or hands-on programs, provided better results in oral hygiene depending on the time and personnel constraints of the orthodontist.


RESUMO Objetivo: O objetivo do presente estudo foi comparar a duração e os pré-requisitos de equipe de três métodos de orientação ao paciente, e seus efeitos sobre os índices de placa e de sangramento gengival. Métodos: Esse foi um estudo controlado aleatório cego em candidatos (n=90) a tratamento ortodôntico fixo, que foram divididos em um grupo controle (n=30) e dois grupos de estudo (n= 30 cada). O grupo controle recebeu material educacional impresso e foi orientado com informações verbais. Os grupos de estudo receberam treinamento em formato de vídeo ou treinamento hands-on sobre o tratamento com Ortodontia fixa e higiene bucal. O tempo necessário para cada um dos três tipos de treinamento foi registrado durante a visita inicial. A qualidade da higiene bucal foi avaliada por meio dos índices de placa e de sangramento gengival durante a visita inicial e na oitava semana de tratamento. As variáveis contínuas foram analisadas utilizando-se one-way ANOVA. Os testes HSD de Tukey e t de Student foram utilizados para comparações post-hoc (α?#8197;= 0,05), e o teste qui-quadrado foi utilizado para análise das variáveis categóricas. Resultados: O método de ensino convencional fracassou em manter os índices de placa e de sangramento gengival até a oitava semana de tratamento. Apesar de tanto o método de treinamento com vídeos e de treinamento hands-on demandarem um tempo considerável, eles conseguiram manter ambos os índices até a oitava semana. Quanto mais longa a orientação realizada, melhor foi a manutenção dos índices de placa e de sangramento gengival. Conclusão: Tanto o método de treinamento com vídeo quanto no formato hands-on obtiveram melhores resultados de higiene bucal, mas dependem do tempo e das limitações de equipe de cada ortodontista.

15.
Angle Orthod ; 90(3): 362-368, 2020 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378427

RESUMO

OBJECTIVE: To investigate treatment stability of miniscrew-anchored maxillary distalization in Class II malocclusion. MATERIALS AND METHODS: This retrospective study included a distalization (n = 19) and a control (n = 19) group; a patient group with minor corrections served the control. Lateral cephalograms of 38 adult patients were taken before (T0), immediately after (T1), and 3-4 years after (T2) treatment. Horizontal and vertical movement and tipping of the maxillary first molars (U6) and central incisors (U1) were measured along with skeletal craniofacial parameters at three time points to compare the two groups regarding the achieved treatment effects and their stability. RESULTS: Total arch distalization therapy led to 4.2 mm of distal movement of U6 without distal crown tipping (0.6° of axis change) and 3.3° of occlusal plane steepening. Over an average retention period of 42 months, maxillary total arch distalization provided high stability of treatment results, showing the same amount of mesial movement (0.7 mm) as the control group. CONCLUSIONS: In Class II treatment, miniscrew-anchored maxillary total arch distalization can provide stable distal movement of the maxillary first molars and central incisors.


Assuntos
Má Oclusão de Angle Classe II , Procedimentos de Ancoragem Ortodôntica , Adulto , Cefalometria , Humanos , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/terapia , Maxila , Dente Molar/diagnóstico por imagem , Desenho de Aparelho Ortodôntico , Estudos Retrospectivos , Técnicas de Movimentação Dentária
16.
Angle Orthod ; 90(5): 688-694, 2020 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378485

RESUMO

OBJECTIVE: To compare the biomechanics of straight labial, straight lingual, and mushroom lingual archwire systems when used in posterior arch expansion. MATERIALS AND METHODS: An electro-mechanical orthodontic simulator allowing for buccal-lingual and vertical displacements of individual teeth and three-dimensional force/moment measurements was instrumented with anatomically shaped teeth for the maxillary arch. In-Ovation L brackets were bonded to lingual surfaces, and Carriere SLX brackets were bonded to labial surfaces to ensure consistency of slot dimensions. Titanium molybdenum archwires were bent to an ideal arch form, and the teeth on the orthodontic simulator were set to a passive position. Posterior teeth from the canine to second molar were moved lingually to replicate a constricted arch. From the constricted position, the posterior teeth were simultaneously moved until the expansive force decreased below 0.2 N. Initial force/moment systems and the amount of predicted expansion were compared for posterior teeth at a significance level of α = 0.05. RESULTS: Archwire type affected both the expected expansion and initial force/moment systems produced in the constricted position. In general, the lingual systems produced the most expansion. The archwire systems were not able to return the teeth to their ideal position, with the closest system reaching 41% of the intended expansion. CONCLUSIONS: In general, lingual systems were able to produce greater expansion in the posterior regions when compared with labial systems. However, less than half of the intended arch expansion was achieved with all systems tested.


Assuntos
Braquetes Ortodônticos , Fios Ortodônticos , Fenômenos Biomecânicos , Incisivo , Desenho de Aparelho Ortodôntico , Técnicas de Movimentação Dentária
17.
Angle Orthod ; 90(4): 491-499, 2020 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378493

RESUMO

OBJECTIVES: To determine three-dimensional treatment changes produced by the Class II Carriere Motion appliance (CMA) in Class II adolescent patients with Class I and Class II skeletal relationships. MATERIALS AND METHODS: The sample included 59 adolescents (16 boys and 43 girls) with unilateral or bilateral Class II molar and bilateral Class II canine relationship. They were divided into group 1 with skeletal Class I (N = 27; ANB 2.90° ± 1.40°; 13.30 ± 1.53 years) and group 2 with skeletal Class II (N = 32; ANB 6.06° ± 1.64°; 13.26 ± 1.76 years). Cone beam computed tomography images were traced with Invivo software pretreatment (T1) and post-CMA usage (T2). The treatment changes in 36 measurements were calculated in each group, and the changes in 16 measurements were compared between them. RESULTS: In group 1 and 2, maxillary first molars underwent significant distal movement (1.92 mm ± 0.80 mm and 1.67 mm ± 1.56 mm, respectively) with distal tipping and rotation, maxillary canines underwent significant distal movement (2.34 mm ± 1.07 mm and 2.24 mm ± 1.91 mm, respectively) with distal tipping and rotation, and mandibular molars underwent significant mesial movement (-1.37 mm ± 1.23 mm and -2.51 mm ± 1.51 mm, respectively) with mesial tipping. Between the groups, there were significant differences in mandibular molar mesial movement and the U1-SN changes (P < .05). CONCLUSIONS: The CMA corrected Class II malocclusion through distal tipping and rotational movement of maxillary canines and molars and corrected mesial tipping of mandibular molars. Significantly more mandibular molar mesial movement and maxillary incisor flaring were observed in patients with skeletal Class II.


Assuntos
Má Oclusão de Angle Classe II , Adolescente , Cefalometria , Feminino , Humanos , Incisivo , Masculino , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/terapia , Maxila/diagnóstico por imagem , Dente Molar/diagnóstico por imagem , Desenho de Aparelho Ortodôntico , Técnicas de Movimentação Dentária
18.
Angle Orthod ; 90(4): 485-490, 2020 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378505

RESUMO

OBJECTIVE: To assess the efficacy and efficiency of treatment in adolescents presenting with mild malocclusions, comparing outcomes using clear aligners to fixed appliances. MATERIALS AND METHODS: Patients identified retrospectively and consecutively from one private practice had been treated with either clear aligners (Invisalign, Align Technology, Santa Clara, Calif) or fixed appliances (0.022 Damon, Ormco, Orange, Calif; n = 26/group). Assessments of occlusion were made using the American Board of Orthodontics Discrepancy Index (DI) for initial records and Cast-Radiograph Evaluation (CRE) for final records. Number of appointments, number of emergency visits, and overall treatment time were determined from chart reviews. Data were analyzed using Pearson's correlation, Wilcoxon rank tests, unpaired t-tests, and Chi-square tests, with significance set to P ≤ .05. RESULTS: Pretreatment, the aligner and fixed groups showed no significant difference in overall severity (DI: 11.9 ± 5.3 vs 11.6 ± 4.8) or in any individual DI category. Posttreatment scores showed finishes for the aligner group had fewer discrepancies from ideal relative to the fixed appliance group (CRE: 30.1 ± 8.3 vs 37.0 ± 9.3; P < .01). Patients treated with aligners had fewer appointments (13.7 ± 4.4 vs 19.3 ± 3.6; P < .0001), fewer emergency visits (0.8 ± 1.0 vs 3.6 ± 2.5; P < .0001), and shorter overall treatment time (16.9 ± 5.7 vs 23.4 ± 4.4 months; P < .0001). CONCLUSIONS: Outcomes for treatment of mild malocclusions in adolescents showed equivalent effectiveness of clear aligners compared to fixed appliances, with significantly improved results for clear aligner treatment in terms of tooth alignment, occlusal relations, and overjet. Assessment of the number of appointments, number of emergency visits, and overall treatment time showed better outcomes for treatment with clear aligners.


Assuntos
Má Oclusão , Aparelhos Ortodônticos Removíveis , Adolescente , Humanos , Má Oclusão/terapia , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos Fixos , Avaliação de Resultados em Cuidados de Saúde , Estudos Retrospectivos , Resultado do Tratamento
19.
Artigo em Inglês | MEDLINE | ID: mdl-33339137

RESUMO

BACKGROUND: The occurrence of an orofacial trauma can originate health, social, economic and professional problems. A 13-year boy suffered the avulsion of tooth 11 and 21, lost at the scenario. METHODS: Three intraoral appliances were manufactured: A Hawley appliance with a central expansion screw and two central incisors (1), trumpet edentulous anterior tooth appliance (2) and a customized splint (3) were designed as part of the rehabilitation procedure. Objectively assessing the sound quality of the trumpet player with these new devices in terms of its spectral, temporal, and spectro-temporal audio properties. A linear frequency response microphone was adopted for precision measurement of pitch, loudness, and timbre descriptors. RESULTS: Pitch deviations may result from the different intra-oral appliances due to the alteration of the mouth cavity, respectively, the area occupied and modification/interaction with the anatomy. This investigation supports the findings that the intra-oral appliance which occupies less volume is the best solution in terms of sound quality. CONCLUSIONS: Young wind instrumentalists should have dental impressions of their teeth made, so their dentist has the most reliable anatomy of the natural teeth in case of an orofacial trauma. Likewise, the registration of their sound quality should be done regularly to have standard parameters for comparison.


Assuntos
Incisivo/lesões , Ortodontia , Avulsão Dentária/reabilitação , Adolescente , Humanos , Masculino , Maxila , Boca/anatomia & histologia , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Radiografia Panorâmica , Dente , Avulsão Dentária/diagnóstico por imagem , Avulsão Dentária/terapia
20.
Angle Orthod ; 90(5): 634-639, 2020 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378478

RESUMO

OBJECTIVES: To examine the effect of micro-osteoperforation (MOP) on the space closure rate using passive self-ligating or conventional brackets. MATERIALS AND METHODS: This was a two-arm parallel randomized controlled trial undertaken at the outpatient department of a dental college. There were 60 participants (30 women and 30 men) who fulfilled the inclusion criteria. Both the study and control groups were subjected to MOPs throughout the period of space closure. MOPs were repeated every 28 days. The experimental group (mean age 19.5 ± 1.66 years) was bonded with passive self-ligating brackets while the control group (mean age 19.9 ± 1.13 years) was bonded with conventional brackets. Both groups were examined and compared for rate of space closure. An evaluation was conducted for both groups until the entire extraction space was closed and confirmed by evaluation of a tight contact between the canine and the second premolar using a piece of dental floss. RESULTS: Before the initiation of retraction, all initial criteria were similar between the two groups (P > .05). No difference was observed between the two groups in the rate of space closure (P > .05). CONCLUSIONS: MOP in conjunction with passive self-ligation does not increase the rate of orthodontic space closure when compared with MOP used with conventional brackets.


Assuntos
Braquetes Ortodônticos , Fechamento de Espaço Ortodôntico , Adolescente , Adulto , Dente Pré-Molar/cirurgia , Feminino , Humanos , Masculino , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos Fixos , Fios Ortodônticos , Técnicas de Movimentação Dentária , Adulto Jovem
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