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1.
Dental press j. orthod. (Impr.) ; 20(3): 50-57, May-Jun/2015. tab, graf
Article in English | LILACS | ID: lil-751404

ABSTRACT

OBJECTIVE: The aim of the present study was to compare dentoalveolar changes in mandibular arch, regarding transversal measures and buccal bone thickness, in patients undergoing the initial phase of orthodontic treatment with self-ligating or conventional bracket systems. METHODS: A sample of 25 patients requiring orthodontic treatment was assessed based on the bracket type. Group 1 comprised 13 patients bonded with 0.022-in self-ligating brackets (SLB). Group 2 included 12 patients bonded with 0.022-in conventional brackets (CLB). Cone-beam computed tomography (CBCT) scans and a 3D program (Dolphin) assessed changes in transversal width of buccal bone (TWBB) and buccal bone thickness (BBT) before (T1) and 7 months after treatment onset (T2). Measurements on dental casts were performed using a digital caliper. Differences between and within groups were analyzed by Student's t-test; Pearson correlation coefficient was also calculated. RESULTS: Significant mandibular expansion was observed for both groups; however, no significant differences were found between groups. There was significant decrease in mandibular buccal bone thickness and transversal width of buccal bone in both groups. There was no significant correlation between buccal bone thickness and dental arch expansion. CONCLUSIONS: There were no significant differences between self-ligating brackets and conventional brackets systems regarding mandibular arch expansion and changes in buccal bone thickness or transversal width of buccal bone. .


OBJETIVO: o objetivo do presente estudo foi comparar as alterações dentoalveolares transversais e a espessura óssea da arcada inferior em pacientes submetidos ao tratamento ortodôntico utilizando sistemas de braquetes autoligáveis ou convencionais. MÉTODOS: uma amostra de 25 pacientes requerendo tratamento ortodôntico foi recrutada com base no tipo de braquete. No Grupo 1, 13 pacientes foram tratados com braquetes autoligáveis (SLB, slot 0,022"); o Grupo 2 incluiu 12 pacientes, nos quais foram colados braquetes convencionais (CLB, slot 0,022"). Utilizou-se tomografia computadorizada de feixe cônico e um programa 3D (Dolphin) para avaliar as alterações pré-tratamento (T1) e 7 meses após o início desse (T2). As medições em modelos de gesso foram realizadas com o auxílio de um paquímetro digital. As diferenças intergrupos, bem como intragrupo, foram analisadas por meio de teste t de Student. Além disso, o coeficiente de correlação de Pearson foi utilizado. RESULTADOS: alterações dentoalveolares significativas foram observadas em ambos os grupos. Entretanto, não houve diferenças significativas entre os grupos. Houve uma diminuição da espessura óssea na região posterior e das medidas transversais em ambos os grupos. Não houve uma correlação significativa entre a espessura óssea posterior e a expansão da arcada dentária, em nenhum dos dois sistemas de braquetes utilizados. CONCLUSÕES: comparando-se o uso dos aparelhos autoligáveis e convencionais, concluiu-se que não houve diferenças dentoalveolares significativas quanto à expansão da arcada inferior e quanto à espessura óssea posterior. .


Subject(s)
Humans , Adolescent , Adult , Young Adult , Tooth/pathology , Orthodontic Brackets/classification , Orthodontic Appliance Design , Dental Arch/pathology , Models, Dental , Cone-Beam Computed Tomography/methods , Mandible/pathology , Orthodontic Wires , Tooth/diagnostic imaging , Bicuspid/diagnostic imaging , Cephalometry/methods , Prospective Studies , Tooth Crown/diagnostic imaging , Imaging, Three-Dimensional/methods , Dental Arch/diagnostic imaging , Malocclusion, Angle Class I/therapy , Mandible/diagnostic imaging , Molar/diagnostic imaging
2.
Dental press j. orthod. (Impr.) ; 19(5): 74-78, Sep-Oct/2014. tab, graf
Article in English | LILACS | ID: lil-727103

ABSTRACT

OBJECTIVE: By means of a photoelastic model, this study analyzed the stress caused on conventional and self-ligating brackets with expanded arch wires. METHOD: Standard brackets were adhered to artificial teeth and a photoelastic model was prepared using the Interlandi 19/12 diagram as base. Successive activations were made with 0.014-in and 0.018-in rounded cross section Nickel-Titanium wires (NiTi) and 0.019 x 0.025-in rectangular stainless steel wires all of which made on 22/14 Interlandi diagram. The model was observed on a plane polariscope - in a dark field microscope configuration - and photographed at each exchange of wire. Then, they were replaced by self-ligating brackets and the process was repeated. Analysis was qualitative and observed stress location and pattern on both models analyzed. CONCLUSIONS: Results identified greater stress on the region of the apex of premolars in both analyzed models. Upon comparing the stress between models, a greater amount of stress was found in the model with conventional brackets in all of its wires. Therefore, the present pilot study revealed that alignment of wires in self-ligating brackets produced lower stress in periodontal tissues in expansive mechanics. .


OBJETIVO: o presente estudo analisou, por meio de um modelo fotoelástico, a distribuição das tensões geradas em braquetes convencionais e autoligáveis quando ativados com arcos expandidos. MÉTODOS: braquetes convencionais foram colados em dentes artificiais e, em seguida, foi confeccionado o modelo fotoelástico, utilizando como base o diagrama 19/12, de Interlandi. Foram feitas trocas sucessivas com fios de liga de níquel-titânio (NiTi) de secção circular 0,014" e 0,018" e de liga de aço de secção retangular 0,019" x 0,025", todos no diagrama 22/14 de Interlandi. A cada troca de fio, o modelo foi observado em polariscópio plano, na configuração de campo escuro, e fotografado. Foi feita a substituição por braquetes autoligáveis e repetido o experimento. A análise foi qualitativa, observando o local e o padrão da tensão das franjas nos dois modelos analisados. CONCLUSÕES: os resultados identificaram uma maior padrão de tensões das franjas na região do ápice de pré-molares em ambos os modelos analisados. Ao se comparar as tensões entre os modelos, observou-se uma maior quantidade de tensão nas franjas no modelo com braquetes convencionais em todos os fios utilizados no experimento. Portanto, o presente estudo mostrou que o alinhamento dos fios nos braquetes autoligáveis produz forças mais suaves nos tecidos periodontais nas mecânicas expansionistas. .


Subject(s)
Humans , Orthodontic Appliance Design , Orthodontic Wires , Orthodontic Brackets/classification , Biomechanical Phenomena , Dental Alloys/chemistry , Mandible , Materials Testing , Models, Anatomic , Nickel/chemistry , Pilot Projects , Photography/methods , Stainless Steel , Stress, Mechanical , Surface Properties , Titanium/chemistry , Tooth Apex/physiology , Tooth Root/physiology
4.
Dental press j. orthod. (Impr.) ; 19(3): 139-157, May-Jun/2014. graf
Article in English | LILACS | ID: lil-723145

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 ligatures) 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 system of self-ligating brackets, with which greater expansive and protrusive tooth movement (maxillary arch) is expected, with conventional brackets Capelozza Prescription III, with which maintaining the original form of the arch (mandibular arch) with as little changes as possible is key to yield the desired results. .


INTRODUÇÃO: a Ortodontia passa, como toda ciência, por constantes evoluções tecnológicas que buscam aumentar a efetividade da abordagem terapêutica, visando a diminuição do tempo de tratamento, o aumento do conforto para os pacientes, bem como a obtenção da tão almejada, e pouco alcançada, estabilidade em longo prazo. O estágio atual de desenvolvimento tecnológico da Ortodontia representa, ao que tudo indica, uma fase de transição entre os sistemas convencionais de ligação (com módulos elásticos) e os chamados autoligáveis. As evidências científicas nem sempre consubstanciam a clara percepção clínica das vantagens desse sistema, no que diz respeito a um menor tempo de alinhamento e nivelamento, uma relativa simplificação técnica, maior conforto para os pacientes, além do aumento da capacidade de tratamento sem extrações - embora essa indicação esteja mais ligada à avaliação do padrão morfológico facial, e menos a qualquer escolha técnica. Desde um passado recente e não menos brilhante, a Ortodontia vem utilizando a individualização de braquetes para tratamentos compensatórios, buscando aumentar a efetividade da abordagem terapêutica, com menores custos biológicos e menor tempo de tratamento. OBJETIVO: o presente artigo tem como objetivo apresentar um protocolo bem definido de melhor aproveitamento dessa fase de transição tecnológica, buscando explorar o que cada sistema tem de melhor, principalmente sob a óptica da redução do tempo de tratamento e aumento da capacidade de movimentação dentária compensatória em pacientes adultos. Especificamente, serão abordadas as más oclusões de Classe III compensáveis, usando o sistema de braquetes ...


Subject(s)
Adult , Female , Humans , Male , Young Adult , Orthodontic Appliance Design , Orthodontic Brackets/classification , Clinical Protocols , Cephalometry/methods , Decision Making , Dental Arch/pathology , 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 , Treatment Outcome , Tooth Movement Techniques/instrumentation , Tooth Movement Techniques/methods
5.
Anon.
Dental press j. orthod. (Impr.) ; 19(2): 27-38, Mar-Apr/2014. graf
Article in English | LILACS | ID: lil-714611

ABSTRACT

Dr. Marissa Keesler attended dental school at Creighton University in Omaha, Nebraska and in 1987 received her Doctor of Dental Surgery degree with high honors. In 1989, she graduated from Marquette University with a Certificate and Master of Science degree in Orthodontics. Dr. Keesler has been an Adjunct Professor in the Marquette Graduate Orthodontic Department since 1990 and has been a guest speaker at several universities and orthodontic groups nationally and internationally. She has contributed to the development of several orthodontic textbooks in topics related to multidisciplinary treatment and the indirect bonding technique. Dr. Keesler is a member of the American Association of Orthodontists and many other local and national dental and orthodontic societies such as the Edward H. Angle Society of Orthodontists and the Pierre Fauchard Academy. She also has Diplomate status with the American Board of Orthodontics and is a graduate of the AEO Roth/Williams Center. Dr. Keesler has been in specialty practice since 1989 and has had a full-time private practice in Neenah since 1992. In 2000, she was joined by her husband, Dr. Jeffrey T. Keesler, who has a dual specialty in Prosthodontics and Orthodontics. Dr. Roberto Lima Filho.


A Dra. Marissa Keesler graduou-se em Odontologia pela Creighton University (EUA) e em 1987 recebeu, com distinção, o título de Doutora em Odontologia, área de concentração em Cirurgia. Em 1989, recebeu o título de Mestre em Ortodontia, pela Marquette University. É professora adjunta no Curso de Graduação do Departamento de Ortodontia da Marquette University desde 1990, além de conferencista convidada em várias universidades e grupos relacionados à Ortodontia nos EUA e ao redor do mundo. Tem dado valiosa contribuição na publicação de diversos livros, relacionados ao tratamento multidisciplinar e à técnica de colagem indireta. É membro de renomadas entidades científicas como a Associação Americana de Ortodontistas, Sociedade Edward H. Angle, Academia Pierre Fauchard, entre outras. Diplomada pelo conceituado American Board of Orthodontics e graduada pelo AEO Roth/Williams Center, a Dra. Keesler está envolvida na prática de especialidades odontológicas desde 1989 e tem trabalhado em sua clínica particular, na cidade de Neenah (Wisconsin, EUA), desde 1992. Dr. Roberto Lima Filho.


Subject(s)
Humans , Orthodontics, Corrective/methods , Patient Care Planning , Radiography, Panoramic , Centric Relation , Dental Bonding/methods , Patient Compliance , Orthodontic Brackets/classification , Orthodontic Appliance Design , Orthodontic Retainers , Occlusal Adjustment , Dentist-Patient Relations , Malocclusion/diagnosis , Malocclusion/therapy , Malocclusion, Angle Class II/therapy
6.
Acta odontol. latinoam ; 27(3): 120-124, 2014. graf
Article in English | LILACS | ID: lil-761859

ABSTRACT

Orthodontic brackets contribute to the accumulation of bacterialplaque on tooth surfaces because they hinder oral hygiene.In contrast to conventional brackets, self-ligating brackets donot require additional parts to support the arches, thus improvingdental hygiene. The aim of this study was to compare thegingival response in orthodontic patients wearing self-ligatingor conventional brackets. A sample of 22 patients aged 16 to 30years was divided into two groups: Group A, treated with selfligatingbrackets (Damon system) and Group B, treated withconventional brackets (Roth technique). The following wereassessed during the treatment: Plaque Index (PI), GingivalIndex (GI) and Probing Depth (PD), and sub-gingival sampleswere taken from teeth 14/24 for microbiological observation.No statistically significant difference was found between GroupsA and B; p>0.05 (sign-ranked) or between PI, GI and PD at thedifferent times (Friedman’s Analysis of Variance), even thoughthe indices were found to increase at 14 days, particularly forself-ligating brackets. The quantity and quality of microorganismspresent were compatible with health on days 0, 28 and 56.As from day 14 there is a predominance of microbiota compatiblewith gingivitis in both groups. In the samples studied,orthodontic treatment increases bacterial plaque and inflammatorygingival response, but gingival-periodontal health canbe maintained with adequate basic therapy...


bacteriana en las superficies dentarias, debido a que dificultanla higiene oral. A diferencia de los brackets convencionales, losbrackets autoligables no requieren elementos adicionales parasujetar los arcos, lo cual favorecería la higiene dentaria. Elobjetivo del presente trabajo fue comparar la respuesta gingivalen pacientes ortodóncicos, utilizando brackets autoligablesy brackets convencionales. Se estudiaron 22 pacientes, entre 16y 30 años, divididos en dos grupos: A, tratado con bracketsautoligables, Sistema Damon) y B, tratado con brackets convencionales,Técnica de Roth. Durante el tratamiento, seevaluaron los Índices de Placa (IP), Índice Gingival (IG) y Profundidadde Sondaje (PS) y se tomaron muestras subgingivalesde las piezas 14/24 para su observación microbiológica. En laevaluación estadística no se encontraron diferencias estadísticamentesignificativa entre los grupos A y B; p>0.05 (de losrangos con signo) y ni en los IP, IG y PS en los diferentes tiemposevaluados (Análisis de varianza de Friedman), sin embargose observa un aumento en los índices a los 14 días, sobre todoen autoligables. Los microorganismos se presentaron en cantidady calidad compatible con salud el día 0, 28 y 56; a partirdel día 14 predomina microbiota compatible con gingivitis paraambos grupos. En las muestras estudiadas el tratamientoortodóncicos produce incremento de placa bacteriana yrespuesta gingival inflamatoria, pero con terapia básica adecuadapuede mantenerse la salud gingivo-lperiodontal. Losbrackets autoligables y los o convencionales, produjeronrespuesta gingival simila...


Subject(s)
Humans , Male , Adolescent , Adult , Female , Young Adult , Biofilms , Gingival Diseases/microbiology , Orthodontic Brackets/classification , Colony Count, Microbial , Culture Media , Dental Plaque Index , Gingivitis/diagnosis , Gingivitis/microbiology , Orthodontic Appliance Design , Periodontal Index , Data Interpretation, Statistical
7.
Dental Journal-Shahid Beheshti University of Medical Sciences. 2008; 26 (1): 20-26
in Persian | IMEMR | ID: emr-86121

ABSTRACT

Due to the disadvantages of self cure composites, application of light cure composites is suggested in orthodontics but light transmission through metal brackets is in doubt. The aim of this study was to compare shear bond strength [SBS] of Ideal Maccoo and Brilliant composites in bonding steel and ceramic brackets. Eight intact first upper premolars were collected for this experimental invitro study and randomly divided into 4 equal groups. The buccal surfaces were etched and cured by visible light after applying margin bond resin. In the first group Ideal Maccoo composite was applied on the steel bracket base [SI group], bracket positioning in the correct location was done and then curing was performed by visible light for 40 seconds [20 seconds from occlusal and 20 seconds from gingival]. In the second group fascination ceramic brackets with Ideal Maccoo composite [CI group], in the third group ceramic brackets with Brilliant composite [CB group] and in the fourth group steel brackets with Bralliant composite [SB group] were bonded to teeth with the same method. SBS was measured by Zwick testing Machine. To compare the groups, Kolomgrov-Smironov, two way analysis of variance, one way analysis of variance and Tukey tests were used. Mean SBS was 9.71 +/- 3.37, 7.36 +/- 4.40, 5.58 +/- 2.21 and 12.36 +/- 5.77 in SI, CI, CB and SB groups respectively. Tukey test showed significant difference between SB and CB groups [P<0.001], no significant differences was detected between CI and SI, SI and SB and between CI and CB. Ideal Maccoo and Brilliant light cure composites had good capabilities in steel bracket bonding whereas ceramic brackets had lower shear bond strength. In bonding ceramic brackets only Ideal Maccoo composite showed acceptable results


Subject(s)
Dental Cements/classification , Dental Cements/standards , Dental Cements , Orthodontic Brackets/classification , Orthodontic Brackets/statistics & numerical data , Dental Porcelain , Curing Lights, Dental/classification
8.
Rev. dent. press ortodon. ortop. maxilar ; 8(3): 25-31, maio-jun. 2003. tab
Article in Portuguese | LILACS | ID: lil-365670

ABSTRACT

O propósito deste trabalho é ressaltar a importância da correta montagem do aparelho ortodôntico, avaliando a confiabilidade na acuidade visual ao se posicionar um acessório e verificando se a experiência clínica pode influenciar nesse posicionamento. Para isto, distribuiu-se diagramas com duas linhas de referência, uma vertical e outra horizontal, aos alunos dos cursos de pós-graduação em Ortodontia, aos níveis de especialização, mestrado e doutorado. Orientou-se os alunos a construir visualmente os ângulos de 3°, 5° e 7° a partir das linhas de referência. De acordo com os resultados desse trabalho, pudemos observar que a confiança apenas na acuidade visual, independente da experiência profissional, apresentou-se insuficiente para o estabelecimento de uma correta angulação do acessório ortodôntico. Assim, devemos dispensar especial atenção durante a montagem do aparelho na técnica "Edgewise", lançando mão de instrumentos que nos auxiliem na correta angulação dos acessórios ortodônticos, como por exemplo, os anguladores, a fim de se evitar as indesejáveis conseqüências das angulações dentárias incorretas.


Subject(s)
Orthodontic Brackets/classification , Tooth Movement Techniques , Orthodontics, Corrective , Orthodontic Appliances , Orthodontics
10.
In. Ferreira, Flávio Vellini. Ortodontia: diagnóstico e planejamento clínico. Säo Paulo, Artes Médicas, 3 ed; 1999. p.361-98, ilus. (BR).
Monography in Portuguese | LILACS, BBO | ID: lil-271662
11.
In. Ferreira, Flávio Vellini. Ortodontia: diagnóstico e planejamento clínico. Säo Paulo, Artes Médicas, 2 ed; 1998. p.363-98, ilus. (BR).
Monography in Portuguese | LILACS, BBO | ID: lil-271515
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