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Start Over Search Limiters Full Text Topic orthodontic appliance design Journal dental press journal of orthodontics
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1. From conventional to self-ligating bracket systems: is it possible to aggregate the experience with the former to the use of the latter?

Author

Capistrano A, Cordeiro A, Siqueira DF, Capelozza Filho L, Cardoso Mde A, and Almeida-Pedrin RR

Subjects
Adult, Cephalometry methods, Clinical Protocols, Decision Making, Dental Arch pathology, Female, Humans, Male, Malocclusion, Angle Class III diagnosis, Malocclusion, Angle Class III therapy, Mandible pathology, Maxilla pathology, Overbite diagnosis, Overbite therapy, Patient Care Planning, Prognathism diagnosis, Prognathism therapy, Technology, Dental, Time Factors, Tooth Movement Techniques instrumentation, Tooth Movement Techniques methods, Treatment Outcome, Young Adult, Orthodontic Appliance Design, Orthodontic Brackets classification
Abstract

Introduction: Orthodontics, just as any other science, has undergone advances in technology that aim at improving treatment efficacy with a view to reducing treatment time, providing patients with comfort, and achieving the expected, yet hardly attained long-term stability. The current advances in orthodontic technology seem to represent a period of transition between conventional brackets (with elastic modules) and self-ligating brackets systems. Scientific evidence does not always confirm the clear clinical advantages of the self-ligating system, particularly with regard to reduced time required for alignment and leveling (a relatively simple protocol), greater comfort for patients, and higher chances of performing treatment without extractions - even though the number of extractions is more closely related to patient's facial morphological pattern, regardless of the technique of choice. Orthodontics has recently and brilliantly used bracket individualization in compensatory treatment with a view to improving treatment efficacy with lower biological costs and reduced treatment time., Objective: This paper aims at presenting a well-defined protocol employed to produce a better treatment performance during this period of technological transition. It explores the advantages of each system, particularly with regards to reduced treatment time and increased compensatory tooth movement in adult patients. It particularly addresses compensable Class III malocclusions, comparing the self-ligating brackets system, in which greater expansive and protrusive tooth movement (maxillary arch) is expected, with Capelozza Prescription III conventional brackets, in which maintaining the original form of the arch (mandibular arch) with as little changes as possible is key to yield the desired results.

Published
2014
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2. Virtual orthodontic setup in orthodontic camouflage planning for skeletal Class III malocclusion

Author

Felipe Augusto M. Barreto and João Roberto R. da Costa Santos

Subjects
Dente supranumerário, Incisivo, Orthodontics, Extração dentária, Mordida cruzada, 030207 dermatology & venereal diseases, 03 medical and health sciences, 0302 clinical medicine, Incisor, otorhinolaryngologic diseases, medicine, Crossbite, Supernumerary, business.industry, Orthodontic Appliance Design, BBO Case Report, 030206 dentistry, Tooth extraction, Craniometry, medicine.disease, Skeletal class, lcsh:RK1-715, Ortodontia corretiva, Dental arch, medicine.anatomical_structure, Tooth, supernumerary, lcsh:Dentistry, Orthodontics, corrective, Oral Surgery, Malocclusion, business
Abstract

The purpose of this paper was to emphasize the importance of the orthodontic setup in treatment planning for skeletal Class III malocclusion correction in an adult patient with moderate lower anterior crowding and anterior crossbite associated with two supernumerary lower incisors.

Published
2018

3. Surface morphology changes of acrylic resins during finishing and polishing phases

Author

Glaucio Serra, Liliane Siqueira de Morais, and Carlos N. Elias

Subjects
Acrylic resins, Morphology (linguistics), Materials science, Surface Properties, Scanning electron microscope, Resinas acrílicas, Acrylic Resins, Mineralogy, Polishing, Orthodontics, Surface finish, Propriedades de superfície, Dental Materials, Orthodontic Appliances, Removable, Materials Testing, Surface properties, Humans, Orthodontic Appliance Design, Composite material, Acrylic resin, Sandpaper, Lasers, Silicates, Abrasive, Silicon Dioxide, Dental Polishing, lcsh:RK1-715, Microscopia eletrônica de varredura, lcsh:Dentistry, visual_art, Microscopy, Electron, Scanning, visual_art.visual_art_medium, Oral Surgery, Scanning electron microscopy, Surface finishing
Abstract

INTRODUCTION: The finishing and polishing phases are essential to improve smoothness and shining on the surface of acrylic resins used to make removable orthodontic appliances. A good surface finishing reduces roughness, which facilitates hygiene, prevents staining and provides greater comfort to the patients. OBJECTIVE: The aim of this paper was to analyze the changes on surface morphology of acrylic resins during finishing and polishing phases. METHODS: Thirty discs (10 mm in diameter and 5 mm in length) were made with acrylic resin and randomly divided into ten groups. The control group did not receive any treatment while the other groups received gradual finishing and polishing. The last group received the entire finishing and polishing procedures. Surface morphology was qualitatively analyzed through scanning electron microscopy and quantitatively analyzed through a laser profilometer test. RESULTS: The acrylic resin surfaces without treatment showed bubbles which were not observed in the subsequent phases. Wearing out with multilaminated burs, finishing with wood sandpaper and finishing with water sandpaper resulted in surfaces with decreasing irregularities. The surfaces that were polished with pumice and with low abrasive liquids showed high superficial smoothness. CONCLUSION: Highly smooth acrylic resin surfaces can be obtained after mechanical finishing and polishing performed with multilaminated burs, wood sandpaper, water sandpaper, pumice and low abrasive liquids. INTRODUÇÃO: as etapas de acabamento e polimento são essenciais para a obtenção de lisura e brilho da superfície de resinas acrílicas utilizadas na confecção de aparelhos ortodônticos. O bom acabamento da resina facilita a higiene, previne o manchamento e propicia maior conforto ao paciente. OBJETIVO: o objetivo desse trabalho foi analisar as alterações na morfologia superficial de resinas acrílicas (Clássico, São Paulo) durante as etapas do acabamento e polimento mecânico. MÉTODOS: foram confeccionados 30 discos (10mm de diâmetro e 5mm de altura) de resina acrílica autopolimerizável, que foram divididos aleatoriamente em dez grupos. O grupo controle não recebeu nenhum tratamento. Os demais grupos receberam acabamento e polimento graduais. O último grupo recebeu todo o tratamento de acabamento e polimento. A morfologia superficial foi avaliada qualitativamente por microscopia eletrônica de varredura e quantitativamente pela análise da rugosidade superficial. RESULTADOS: as superfícies de resina acrílica sem tratamento apresentaram bolhas, as quais não foram observadas nas fases subsequentes. O desgaste com fresa multilaminada seguido de acabamento com lixa de madeira e lixa d'água produziram superfícies com irregularidades decrescentes. As superfícies polidas com branco de Espanha e líquido de baixa abrasividade (Kaol) apresentaram bom acabamento superficial. CONCLUSÃO: é possível obter resina acrílica com alta lisura superficial após acabamento e polimento mecânico com fresas, lixas de madeira, lixas d'água, branco de Espanha e líquidos de baixa abrasividade (Kaol).

Published
2013

4. Class II malocclusion with accentuated occlusal plane inclination corrected with miniplate: a case report

Author

Marcel Marchiori Farret and Milton M. Benitez Farret

Subjects
Angle Class II malocclusion, Orthodontic anchorage procedures, Orthodontic appliance design, Dentistry, RK1-715
Abstract

ABSTRACT Introduction: A canted occlusal plane presents an unesthetic element of the smile. The correction of this asymmetry has been typically considered difficult by orthodontists, as it requires complex mechanics and may sometimes even require orthognathic surgery. Objective: This paper outlines the case of a 29-year-old woman with Class II malocclusion, pronounced midline deviation and accentuated occlusal plane inclination caused by mandibular deciduous molar ankylosis. Methods: The patient was treated with a miniplate used to provide anchorage in order to intrude maxillary teeth and extrude mandibular teeth on one side, thus eliminating asymmetry. Class II was corrected on the left side by means of distalization, anchored in the miniplate as well. On the right side, maxillary first premolar was extracted and molar relationship was kept in Class II, while canines were moved to Class I relationship. The patient received implant-prosthetic rehabilitation for maxillary left lateral incisor and mandibular left second premolar. Results: At the end of treatment, Class II was corrected, midlines were matched and the canted occlusal plane was totally corrected, thereby improving smile function and esthetics.

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5. Superelasticity and force plateau of nickel-titanium springs: an in vitro study

Author

Lídia Parsekian Martins, Renato Parsekian Martins, Sergei Godeiro Fernandes Rabelo Caldas, Camila Ivini Viana Vieira, Universidade Federal do Rio Grande do Norte (UFRN), and Universidade Estadual Paulista (Unesp)

Subjects
Dental Stress Analysis, Force plateau, Thermodynamics, Orthodontics, Plateau (mathematics), NiTi, 03 medical and health sciences, 0302 clinical medicine, Nickel, Materials Testing, Orthodontic Wires, In vitro study, Humans, Orthodontic Appliance Design, Superelasticity, Mathematics, Titanium, Superelasticidade, 030206 dentistry, Articles, Coil spring, Elasticity, lcsh:RK1-715, Nickel titanium, Spring (device), Patamar de força, lcsh:Dentistry, Pseudoelasticity, Stress, Mechanical, Oral Surgery, 030217 neurology & neurosurgery, Dental Alloys
Abstract

Objective: This paper analyzed whether nickel-titanium closed coil springs (NTCCS) have a different superelastic (SE) behavior according to activation and whether their force plateau corresponds to that informed by the manufacturer. Methods: A total of 160 springs were divided into 16 subgroups according to their features and activated proportionally to the length of the extensible part (NiTi) of the spring (Y). The force values measured were analyzed to determine SE rates and force plateaus, which were mathematically calculated. These plateaus were compared to those informed by the manufacturer. Analysis of variance was accomplished followed by Tukey post-hoc test to detect and analyze differences between groups. Results: All subgroups were SE at the activation of 400% of Y length, except for: subgroups 4B and 3A, which were SE at 300%; subgroups 4E and 4G, which were SE at 500%; and subgroup 3C, which was SE at 600%. Subgroup 3B did not show a SE behavior. Force plateaus depended on activation and, in some subgroups and some activations, were similar to the force informed. Conclusions: Most of the springs showed SE behavior at 400% of activation. Force plateaus are difficult to compare due to lack of information provided by manufacturers. resumo Objetivo: o presente artigo analisou se as molas helicoidais fechadas de níquel-titânio apresentam superelasticidade (SE), de acordo com a ativação, e se o platô de força medido corresponde ao informado pelo fabricante. Material e Métodos: 160 molas foram divididas em 16 subgrupos, de acordo com suas características, e foram ativadas proporcionalmente ao comprimento da parte extensível (NiTi) da mola (Y). Os valores de força obtidos foram analisados para determinar as taxas de SE e os platôs de força, os quais foram calculados matematicamente - sendo esses platôs comparados aos informados pelos fabricantes. Uma análise de variância foi realizada, seguida do teste post-hoc de Tukey, para detectar e analisar as diferenças entre os grupos. Resultados: todos os subgrupos apresentaram SE em ativação de 400% do comprimento Y, com exceção dos subgrupos 4B e 3A (que apresentaram SE a 300%), dos subgrupos 4E e 4G (com SE a 500%) e do subgrupo 3C (que apresentou SE na ativação de 600%). O subgrupo 3B não apresentou comportamento superelástico. Os platôs de força dependeram da ativação e em alguns subgrupos, em determinadas ativações, foram semelhantes à força informada pelo fabricante. Conclusões: a maioria das molas apresentou comportamento superelástico na ativação de 400%. Os platôs de força são difíceis de ser comparados, devido à falta de informações por parte dos fabricantes.

6. Deformation of nickel-titanium closed coil springs: an in vitro study

Author

Renato Parsekian Martins, José Maurício dos Santos Nunes Reis, Lídia Parsekian Martins, Luiz Geraldo Vaz, Camilla Ivini Viana Vieira, and Universidade Estadual Paulista (Unesp)

Subjects
Dental Stress Analysis, Deformação, Orthodontics, Materials testing, NiTi, 03 medical and health sciences, 0302 clinical medicine, Biomecânica, Orthodontic Appliances, Nickel, Materials Testing, Alloys, Orthodontic Appliance Design, In vitro study, Biomechanics, Titanium, Physics, Articles, 030206 dentistry, Elasticity, Deformation, lcsh:RK1-715, lcsh:Dentistry, Oral Surgery, Humanities, 030217 neurology & neurosurgery
Abstract

Objective: The aim of this paper was to determine the amount of deformation in four commercial brands of nickel-titanium closed springs. Methods: A total of 130 springs were divided into 13 subgroups, according to their features and manufacturers (Morelli, Orthometric, Ormco and GAC) and activated from 100% to 1000% of the effective length of the nickel-titanium portion present at the spring, at 37 °C. Deactivation data were plotted and deformation was found graphically. The values were compared by analysis of variance and Tukey's post-hoc test. Results: Springs manufactured by Morelli had the same amount of deformation when they were activated up to 700% of Y activation; springs by Orthometric had the same amount of deformation up to 600-700% of Y; springs by Ormco had the same amount of deformation up to 700-800% of Y; and finally, the majority of springs by GAC had similar deformation up to 800%-1000% of activation. All springs tested could be activated up to 700% without rupture. Conclusions: Most subgroups were similarly deformed up to 700% of activation, without rupture of springs. Subgroups 4B, 4C, 4D and 4E showed the same amount of deformation up to 1000% of activation without any rupture at all. RESUMO Objetivo: o objetivo desse trabalho foi determinar a deformação em molas fechadas de níquel-titânio de quatro marcas comerciais. Métodos: cento e trinta molas foram divididas em treze subgrupos, de acordo com suas características e fabricantes (Morelli, Orthometric, Ormco e GAC), com ativação entre 100% e 1.000% do comprimento efetivo de níquel-titânio presente na mola (Y), a 37 °C. Dados de desativação foram coletados e a deformação foi obtida de forma gráfica. Os valores foram comparados por meio de análise de variância e teste post-hoc de Tukey. Resultados: as molas da Morelli apresentaram a mesma quantidade de deformação considerando-se 700% de ativação de Y; as molas da Orthometric tiveram a mesma quantidade de deformação até 600-700% de Y; as molas da Ormco tiveram a mesma quantidade de deformação até 700-800% de Y; e, por fim, a maioria das molas da GAC apresentou deformação semelhante até 800-1.000% de ativação. Todas as molas testadas puderam ser ativadas até 700% sem ruptura. Conclusões: a maioria dos subgrupos se deformou de maneira semelhante até 700% de ativação, sem ruptura das molas. Os subgrupos 4B, 4C, 4D e 4E demonstraram a mesma quantidade de deformação até 1.000% de ativação, sem nenhuma ruptura.

7. Class II malocclusion with accentuated occlusal plane inclination corrected with miniplate: a case report

Author

Milton Meri Benitez Farret and Marcel Marchiori Farret

Subjects
Molar, Adult, Tooth Movement Techniques, Cephalometry, medicine.medical_treatment, Má oclusão Classe II de Angle, Orthognathic surgery, Dentistry, Orthodontics, Desenho do aparelho ortodôntico, Malocclusion, Angle Class II, Angle Class II malocclusion, Maxillary first premolar, 03 medical and health sciences, 0302 clinical medicine, stomatognathic system, Radiography, Panoramic, Premolar, medicine, Ankylosis, Humans, Maxillary central incisor, business.industry, Orthodontic anchorage procedures, 030206 dentistry, Articles, medicine.disease, Orthodontic Anchorage Procedures, lcsh:RK1-715, Procedimentos de ancoragem ortodôntica, Orthodontic appliance design, medicine.anatomical_structure, lcsh:Dentistry, Female, Oral Surgery, Malocclusion, business, 030217 neurology & neurosurgery
Abstract

Introduction: A canted occlusal plane presents an unesthetic element of the smile. The correction of this asymmetry has been typically considered difficult by orthodontists, as it requires complex mechanics and may sometimes even require orthognathic surgery. Objective: This paper outlines the case of a 29-year-old woman with Class II malocclusion, pronounced midline deviation and accentuated occlusal plane inclination caused by mandibular deciduous molar ankylosis. Methods: The patient was treated with a miniplate used to provide anchorage in order to intrude maxillary teeth and extrude mandibular teeth on one side, thus eliminating asymmetry. Class II was corrected on the left side by means of distalization, anchored in the miniplate as well. On the right side, maxillary first premolar was extracted and molar relationship was kept in Class II, while canines were moved to Class I relationship. The patient received implant-prosthetic rehabilitation for maxillary left lateral incisor and mandibular left second premolar. Results: At the end of treatment, Class II was corrected, midlines were matched and the canted occlusal plane was totally corrected, thereby improving smile function and esthetics. RESUMO Introdução: o plano oclusal inclinado representa um elemento antiestético para o sorriso. A correção dessa assimetria é normalmente considerada difícil pelos ortodontistas, requerendo mecânica complexa e, algumas vezes, até cirurgia ortognática. Objetivo: esse artigo descreve o caso de uma paciente de 29 anos, portadora de má oclusão de Classe II, com considerável desvio das linhas médias e acentuada inclinação do plano oclusal, causada pela anquilose de molar decíduo inferior. Métodos: a paciente foi tratada com ancoragem em miniplaca, para promover a intrusão dos dentes superiores e extrusão dos dentes inferiores em um lado, eliminando a assimetria. A Classe II foi corrigida no lado esquerdo por meio de distalização, também ancorada na miniplaca. No lado direito, o primeiro pré-molar superior foi extraído e a relação de molares de Classe II foi mantida, enquanto os caninos foram movidos para relação de Classe I. A paciente recebeu reabilitação por meio de implante e prótese no incisivo lateral superior esquerdo e no segundo pré-molar inferior esquerdo. Resultados: ao término do tratamento, a Classe II foi corrigida, as linhas médias estavam coincidentes e a inclinação do plano oclusal foi totalmente corrigida, melhorando consideravelmente os aspectos funcionais e estéticos da oclusão.