Análise das obrigações jurídicas do cirurgião-dentista que trabalha como profissional liberal / Analysis of legal obligations of the dentist working as independent professional

Resumo O objetivo do presente trabalho foi analisar as obrigações jurídicas do cirurgião-dentista que trabalha como profissional liberal. Diferentes legislações relacionadas às possíveis formas de trabalho em Odontologia no Brasil foram levantadas, sendo selecionadas as que se referiam ao trabalho do cirurgião-dentista que trabalha de forma independente, não subordinada a outros profissionais e sem constituir pessoa jurídica. Concluiu-se que, como profissional liberal, o cirurgião-dentista deve: 1) Estar inscrito no Conselho de Odontologia; atender aos requisitos da vigilância sanitária; obter alvará de Licença para Localização e Funcionamento e realizar o pagamento do Imposto sobre Prestação de Serviços para a Prefeitura da cidade em que for trabalhar e realizar o Cadastro Nacional dos Estabelecimentos de Saúde (CNES), instituído pelo Ministério da Saúde; 2) Respeitar suas obrigações como empregador perante os Técnicos em Saúde Bucal, os Auxiliares em Saúde Bucal e os cirurgiões-dentistas que lhe prestem serviços de natureza não eventual, sob sua dependência e mediante o pagamento de salário, previstos na Constituição Federal, na Consolidação das Leis do Trabalho, nas Convenções Coletivas de Trabalho e nos Acordos Coletivos de Trabalho; 3) Conhecer quais procedimentos podem ser delegados ao Técnico em Saúde Bucal e ao Auxiliar em Saúde Bucal; 4) Emitir Recibo de Pagamento Autônomo a outros cirurgiões-dentistas que prestem funções específicas de curta duração em seus consultórios; 5) Indenizar os pacientes, caso fique provado mediante perícia em um processo judicial, que tenha causado dano, por ação ou omissão voluntária, negligência ou imprudência, trabalhando individualmente ou, nos casos multidisciplinares, com outros profissionais. (AU)

Abstract The aim of this study was to analyze the legal obligations of a dentist working as an independent professional. Different legislations related to the possible types of Dentistry work in Brazil were raised, those related to the dentist who works independently, not subordinated to other professionals, and not constituting a company were selected. It was concluded that as an independent professional, the dentist must: 1) Be enrolled in the Dental Council; meet the requirements of health surveillance; obtain a license for Location and Operation and pay the Tax on Services to the City Hall of the city where he/she will work; and to carry out the National Register of Health Establishments (CNES), established by the Ministry of Health; 2) To respect his/her obligations as an employer of Oral Health Technicians, Oral Health Assistants and dentists who provide services of a non-eventual nature, under his/her dependence and by means of payment of salary, as required in the Federal Constitution, in Consolidation Labor Laws, Collective Bargaining Agreements and Collective Labor Agreements; 3) To know which procedures can be delegated to the Oral Health Technician and the Oral Health Assistant; 4) Issue Independent Worker Payment Receipt to other dentists who perform specific short-term functions in their offices; and 5) Indemnify patients, if it is established by means of an expertise evaluation in a lawsuit that the dentist had caused them harm, by voluntary act or omission, negligence or recklessness, working individually or in multidisciplinary cases with other professionals.(AU)

Dilemas éticos e bioéticos na indicação da Ortodontia preventiva e interceptativa baseada em evidências / Ethical and bioethical dilemmas in evidence based preventive and interceptive Orthodontics indication

Objetivos: O objetivo do presente trabalho foi analisar, se diante da "Odontologia Baseada em Evidências", seria ético o cirurgião-dentista, independentemente de sua especialidade, realizar tratamentos ortodônticos preventivos e interceptativos em crianças e adolescentes. Metodologia: A prevalência de diferentes maloclusões nas dentições decídua, mista e permanente, as legislações relacionadas às competências do cirurgião-dentista no Brasil e os resultados de revisões sistemáticas e de meta-análises sobre a comparação da efetividade do tratamento ortodôntico em 1 ou em 2 fases foram analisados pelo prisma ético do "Querer-Poder-Dever" e pelos princípios bioéticos da "autonomia", "beneficência", "não maleficência" e "justiça". Resultados e Considerações Finais: Concluiu-se que: 1) A alta prevalência de maloclusões nas dentições decídua, mista e permanente justifica que o cirurgião-dentista queira tratar as mesmas; 2) Pela legislação brasileira, o Clínico Geral, o Odontopediatra, o Ortodontista e o especialista em Ortopedia Funcional dos Maxilares podem tratar maloclusões em crianças e adolescentes; 3) Segundo os princípios bioéticos da não maleficência, beneficência e justiça, o cirurgião-dentista ético deve indicar tratamento ortodôntico preventivo e interceptativo apenas para determinados tipos e severidades de maloclusões, ponderando aspectos psicossociais envolvidos e considerando a maturidade do paciente e a conscientização dos pais; 4) Pelo princípio bioético da autonomia, o responsável legal do paciente em crescimento e com maloclusão deve ser esclarecido sobre as evidências científicas a favor e contra o tratamento ortodôntico preventivo e interceptativo, por meio de Termo de Consentimento Informado, para poder decidir se deseja que o paciente seja submetido a esse procedimento. (AU)

Objectives: The aim of this study was to analyze whether in face of "Evidence-Based Dentistry", it would be ethical for the dentist, regardless of his/her specialty, to perform preventive and interceptive orthodontic treatments in children and adolescents. Methods: Prevalence of different malocclusions in deciduous, mixed and permanent dentition, laws related to dentists' competences in Brazil, and results of systematic reviews and of meta-analyses on comparing orthodontic treatment effectiveness in 1 or 2 phases were analyzed by the ethical references of "willingness-permission-duty" and the bioethical principles of "autonomy", "beneficence", "non-maleficence" and "justice". Results and Final Considerations: It was concluded that: 1) High prevalence of malocclusions in deciduous, mixed and permanent dentition justifies dentists willingness to treat them; 2) According to Brazilian law, General Dentist, Pediatric Dentist, Orthodontist and Jaws Functional Orthopedist have legal permission to treat malocclusions in children and adolescents; 3) According to the bioethical principles of non-maleficence, beneficence and justice, the ethical dentist should only indicate preventive and interceptive orthodontic treatment for certain types and severities of malocclusions, considering psychosocial aspects involved and the patients maturity and parental awareness; 4) By the bioethical principle of autonomy, the legal representative of the growing patient with malocclusion must be informed about scientific evidence for and against preventive and interceptive orthodontic treatment by means of Informed Consent, in order to be able to decide whether he/she wishes the patient to be submitted to this procedure. (AU)

The Periodontal Benefit of Orthodontic Tooth Movement in a Deep Facial Recession of a Mandibular Incisor.

Gingival recession refers to the exposure of the tooth's surface by an apical shift of the gingiva. The aim of this paper is to present a clinical case of an adult patient with a skeletal Class I and clinically deep gingival recession in the mandibular left central incisor. A preadjusted appliance with 0.022 in × 0.028 in slot was placed in both arches. Rectangular arches were used, with the addition of root lingual torque, specifically in the left lower central incisor. Class II and vertical intermaxillary elastics were used throughout the active treatment to obtain intercuspation of the posterior teeth. The orthodontic movement with the application of a localized biomechanics system of forces into the mandibular left central incisor delivered good dental and functional occlusion and, mainly, gingival and periodontal health. The follow-up showed stable results with the periodontium within normal limits and an improved occlusal interdigitation.

Class II Division 2 subdivision left malocclusion associated with anterior deep overbite in an adult patient with temporomandibular disorder.

The orthodontic treatment of patients with chief complaint of temporomandibular disorders (TMD) presents doubtful prognosis, due to the poor correlation between malocclusions and TMDs. The present case report describes the treatment of an adult patient with Angle Class II Division 2 subdivision left malocclusion associated with anterior deep overbite and TMD. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements to obtain the title of BBO Diplomate.

Class II Division 2 subdivision left malocclusion associated with anterior deep overbite in an adult patient with temporomandibular disorder

ABSTRACT The orthodontic treatment of patients with chief complaint of temporomandibular disorders (TMD) presents doubtful prognosis, due to the poor correlation between malocclusions and TMDs. The present case report describes the treatment of an adult patient with Angle Class II Division 2 subdivision left malocclusion associated with anterior deep overbite and TMD. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements to obtain the title of BBO Diplomate.

RESUMO O tratamento ortodôntico de pacientes com queixa principal de disfunção nas articulações temporomandibulares (DTM) apresenta prognóstico duvidoso, devido à baixa correlação entre as más oclusões e as DTMs. O presente relato de caso descreve o tratamento de um paciente adulto com má oclusão de Classe II, divisão 2, subdivisão esquerda, de Angle e sobremordida profunda, associadas à DTM. Esse caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO), como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.

Tridimensional finite element analysis of teeth movement induced by different headgear forces.

BACKGROUND: This study aimed to simulate the actions of low-pull (LP), high-pull (HP), and combined pull (CP) headgears (HGs) and to analyze tooth movement tendencies through finite element analysis. METHODS: Tomographic slices of a human maxilla with complete permanent dentition were processed by reconstruction software, and the triangular surface mesh was converted into non-uniform rational B-spline (NURBS) curves. An HG facial bow was also modulated in 3D. The teeth and bone were considered to have isotropic and linear behavior, whereas the periodontal ligament was considered to have non-linear and hyperelastic behavior. Data regarding the application points, directions and magnitudes of forces were obtained from the literature and from a dolichofacial patient with class II, division 1 malocclusion, who was treated with a CP HG. RESULTS: The CP HG promoted 37.1 to 41.1 %, and the HP HG promoted 19.1 to 31.9 % of LP distalization. The HP HG presented the highest intrusion, and the LP HG presented the highest extrusion of the first molar. The LP HG contracted the distal side, and the HP and CP HGs contracted the lingual and distobuccal roots of the second molar to a lesser degree. CONCLUSIONS: The LP HG promotes the greatest distalization, followed by the CP and HP HGs; the LP HG causes greater extrusion of the first molar, and the HP HG causes greater intrusion of the first molar. The LP HG causes greater contraction of the second molar than the HP HG.

Orthodontic intrusion of maxillary incisors: a 3D finite element method study.

OBJECTIVE: In orthodontic treatment, intrusion movement of maxillary incisors is often necessary. Therefore, the objective of this investigation is to evaluate the initial distribution patterns and magnitude of compressive stress in the periodontal ligament (PDL) in a simulation of orthodontic intrusion of maxillary incisors, considering the points of force application. METHODS: Anatomic 3D models reconstructed from cone-beam computed tomography scans were used to simulate maxillary incisors intrusion loading. The points of force application selected were: centered between central incisors brackets (LOAD 1); bilaterally between the brackets of central and lateral incisors (LOAD 2); bilaterally distal to the brackets of lateral incisors (LOAD 3); bilaterally 7 mm distal to the center of brackets of lateral incisors (LOAD 4). RESULTS AND CONCLUSIONS: Stress concentrated at the PDL apex region, irrespective of the point of orthodontic force application. The four load models showed distinct contour plots and compressive stress values over the midsagittal reference line. The contour plots of central and lateral incisors were not similar in the same load model. LOAD 3 resulted in more balanced compressive stress distribution.

Orthodontic intrusion of maxillary incisors: a 3D finite element method study

Objective: In orthodontic treatment, intrusion movement of maxillary incisors is often necessary. Therefore, the objective of this investigation is to evaluate the initial distribution patterns and magnitude of compressive stress in the periodontal ligament (PDL) in a simulation of orthodontic intrusion of maxillary incisors, considering the points of force application. Methods: Anatomic 3D models reconstructed from cone-beam computed tomography scans were used to simulate maxillary incisors intrusion loading. The points of force application selected were: centered between central incisors brackets (LOAD 1); bilaterally between the brackets of central and lateral incisors (LOAD 2); bilaterally distal to the brackets of lateral incisors (LOAD 3); bilaterally 7 mm distal to the center of brackets of lateral incisors (LOAD 4). Results and Conclusions: Stress concentrated at the PDL apex region, irrespective of the point of orthodontic force application. The four load models showed distinct contour plots and compressive stress values over the midsagittal reference line. The contour plots of central and lateral incisors were not similar in the same load model. LOAD 3 resulted in more balanced compressive stress distribution.

Objetivo: frequentemente, no tratamento ortodôntico, é necessário o movimento de intrusão dos incisivos superiores. Assim, o objetivo deste estudo é avaliar o padrão de distribuição inicial e magnitude das tensões compressivas no ligamento periodontal (LPD) na simulação da intrusão ortodôntica dos incisivos superiores, considerando os pontos de aplicação da força. Métodos: modelos anatômicos 3D reconstruídos a partir de tomografias computadorizadas de feixe cônico foram utilizados para simular os carregamentos da intrusão dos incisivos superiores. Os pontos eleitos para a aplicação das forças foram: centralizado entre os braquetes dos incisivos centrais (LOAD 1); bilateralmente, entre os braquetes dos incisivos centrais e laterais (LOAD 2); bilateralmente, distal aos braquetes dos incisivos laterais (LOAD 3); bilateralmente, 7mm distal ao centro dos braquetes dos incisivos laterais (LOAD 4). Resultados e Conclusões: as tensões concentraram-se na região apical do LPD, independentemente do ponto de aplicação da força ortodôntica; os quatro modelos de carregamento mostraram distribuição e valores de tensão compressiva distintos na linha mediana sagital de referência; os gráficos de distribuição das tensões não foram similares para os incisivos central e lateral no mesmo modelo de carregamento; o LOAD 3 resultou em uma distribuição mais equilibrada das tensões compressivas.

Insertion torque, pull-out strength and cortical bone thickness in contact with orthodontic mini-implants at different insertion angles.

This study aimed to evaluate biomechanical behaviour of inclined orthodontic mini-implants by analyzing its insertion torque (IT), axial pull-out strength (APS), and cortical bone thickness in contact with mini-implant (CBTC). A total of 102 mini-implants were inserted at 90 degree, 60 degree, and 45 degree to the surface of synthetic bone. Peak IT was measured, and the mini-implants were aligned with the mechanical testing machine to record the APS. The cortical bone thickness in contact with each mini-implant was measured after the pull-out test and the data were subjected to statistical analyses. The 45 degree group had a significantly higher IT compared with the 90 degree group (P < 0.05). There was a statistically significant increase in the average of cortical bone thickness in CBTC across the three groups (P < 0.05). A negative correlation between the angulation and the CBTC (r = -0.95, P < 0.05) and a positive correlation between the APS and the CBTC were observed (r = 0.34, P < 0.05). Mini-implants that are inserted more inclined to the surface of the bone provide greater IT and an increased contact with the cortical bone. The greater the CBTC, the greater is the APS.

Validação jurídica do prontuário odontológico eletrônico: proposta fundamentada na legislação brasileira / Legal validation of electronic dental records: a proposal based on Brazilian Legislation

Introdução: buscando aliar a utilização de recursos tecnológicos digitais com a segurança jurídica, o objetivo do presente trabalho é viabilizar, por meio de conceitos da Ciência do Direito, uma proposta para validação jurídica do “Prontuário Odontológico Eletrônico”. Métodos: como no Ordenamento Jurídico brasileiro não há legislação específica sobre esse assunto, a questão foi analisada conforme a analogia, os costumes e os princípios gerais de direito. Resultados e Conclusões: é possível obter “Prontuário Odontológico Eletrônico” com a mesma validade jurídica do “Prontuário Odontológico Convencional”. Para tanto, o cirurgião-dentista, o laboratório de radiologia e o paciente devem assinar digitalmente os arquivos da documentação digital que tenham responsabilidade de assinar na documentação convencional não-digital.

Influence of Ortho Primer Morelli adhesion booster on orthodontic brackets shear bond strength

OBJECTIVE: This work aimed at assessing the bond strength (AS), the site of the flaw and the relation between them and Ortho Primer Morelli® (OPM) adhesion optimizer. METHODS: Sixty test specimens, made out of bovine permanent lower incisors, were divided into three groups: TXT Primer (control), in which a conventional adhesive system was applied (primer and paste); OPM, in which TXT primer was replaced by OPM; and TXT without Primer, in which only TXT paste was used. A shear force was applied at a speed of 0,5 mm/min. Failure site was assessed by the Remaining Adhesion Index (RAI). RESULTS: Kruskal-Wallis demonstrated that OPM (8.54 ± 1.86 MPa) presented a statistically higher AS (p < 0.05) IF compared to TXT Primer (6.83 ± 2.05 MPa). There was no statistically significant difference (p > 0.05) between TXT with or without Primer (6.42 ± 2.12 MPa). Regarding the RAI, the K test demonstrated that TXT Primer and OPM (prevailing scores 2 and 3) showed higher values (p < 0.05) IF compared to TXT without Primer (prevailing scores 0 and 1). Spearman demonstrated that there was no correlation between AS and RAI (p > 0.05). CONCLUSION: OPM increases AS and presents the same bond failure location if compared to a conventional adhesive system; the use of the TXT adhesive system paste only was shown to have the same AS if compared to conventional systems, except it does not allow to predict the adhesive failure site; there is no correlation between AS and bond failure location, regardless of the use of any adhesion optimizer.

Digital signature of electronic dental records.

INTRODUCTION: The purpose of this article is to examine the feasibility of digital signature technology to guarantee the legal validation of electronic dental records. METHODS: The possible uses of digital signature technology, the actual use of digital signature technology to authenticate electronic dental records, the authentication of each part of the electronic dental record, the general legal principles involved, how to digitally sign electronic dental record files, and the limitations of this method are discussed. RESULTS AND CONCLUSIONS: It is possible to obtain electronic dental records that carry the same legal certainty as conventional, nonelectronic records. For this purpose, each part of the electronic dental records should be digitally signed by the author of the document.

General dentist orthodontic practice in foreign legal systems

OBJECTIVE: General dentist orthodontic practice is a controversial issue and this paper aims to analyze it comparing foreign laws to Brazilian Legal System. METHODS: Regulations and scientific texts concerning orthodontic practice by general dentists, in Portuguese or English language, were sought. RESULTS AND CONCLUSION: Portugal clearly forbids general dentist orthodontic practice; United States of America do not clearly forbid general dentist orthodontic practice, but do regulate and promote campaigns to encourage public to seek specialist service; in Australia and England, corrective orthodontics are offered both by orthodontists and general dentists; it was not possible to evaluate how orthodontic services are provided in Eastern Europe; and the fact that general dentists are forbidden to practice corrective orthodontics in Brazilian Legal System is compatible to other countries policy.

Treatment of an adult with several missing teeth and atrophic old mandibular first molar extraction sites.

This report describes the orthodontic treatment of a woman, aged 34 years 2 months, with several missing teeth and atrophic mandibular first molar extraction sites. We had planned to close the spaces from the missing maxillary canines with mesial movement of the premolars and molars. In the mandibular arch, protraction of the second molars into first molar extraction sites and reduction of the mandibular incisor protrusion were performed. No miniscrews or bone plates were used. A modified helical loop was used, and it can be considered a simple and an efficient orthodontic method of closing the spaces without mesial or lingual tipping and rotation. Pleasing esthetic and functional results were achieved.

Prevalência de dentes supranumerários em pacientes que procuraram tratamento ortodôntico / Prevalence of supernumerary teeth in patients who sought orthodontic treatment

Objetivo: Este trabalho teve como objetivo avaliar a prevalência de dentes supranumerários em pacientes que procuraram atendimento na clínica odontológica no Programa de Pós-Graduação em Odontologia, área de concentração em Ortodontia da Pontifícia Universidade Católica do Paraná (PUCPR). Materiais e Métodos: Foram analisadas 247 radiografias panorâmicas, de pacientes com idades entre 6 anos e 12 anos e 11 meses, 112 do gênero masculino e 135 do feminino, em um negatoscópio em sala escura. Resultados: A prevalência dos dentes supranumerários foi de 2,43% (seis dentes), acometendo apenas a maxila de 6 indivíduos do gênero masculino, sendo todos localizados na região da linha mediana. O Teste de Diferença entre duas Proporções demonstrou que houve diferença estatística (p = 0,0063) entre os gêneros, considerandotanto “Arcada Dentária” quanto “Região”. Conclusão: Os dentes supranumerários foram encontradosexclusivamente no gênero masculino, na maxila e na linha mediana. Evidenciou-se a importância do exameradiográfico panorâmico no estudo da prevalência dessa anomalia dentária de desenvolvimento, para queprocedimentos preventivos, interceptivos e/ou corretivos possam ser planejados.

Objective: The aim of this study was to assess supernumerary teeth prevalence in patients who sought orthodontic treatment at Pontifical Catholic University of Paraná. Materials and methods: Standard viewbox with background light masked was utilized in order to evaluate 247 panoramic radiographs of both genders patients aging from 6 years-old to 12 years and 11 months. Results: Prevalence of supranumerary teeth was 2.43% (six teeth), localized only in maxillary arch and in the midline region of male subjects. Difference Between Two Proportions test showed that there was statistical difference (p = 0.0063) between genders, considering both “Dental Arch” and “Region”. Conclusions: Supranumerary teeth were only found in male patients, in maxilla and in the midline. Panoramic radiographs assessment is important in order to study the prevalence of this dental development anomaly and permits that interceptive and/or corrective procedures may be planned.

Orthodontic-prosthetic treatment of an adult with a severe Class III malocclusion.

This case report describes the treatment of a 37-year-old woman with multiple restored and missing teeth, a Class III subdivision malocclusion, and complete dental crossbite. Treatment options included orthognathic surgery and an orthodontic-prosthetic approach. The patient opted for nonsurgical treatment with space opening for prosthetic replacement of the first maxillary molars.

Influence of natural bovine enamel roughness on bond strength after etching.

OBJECTIVE: To determine and compare the longitudinal and transverse roughness parameters of the enamel surface of bovine teeth and evaluate the influence of these parameters on bond strength. MATERIALS AND METHODS: Ninety bovine incisors were used. The surface roughness of enamel was measured with a profilometer. For each tooth, five readings were taken in the longitudinal plane and five were taken in the transverse plane of the long axis of the tooth in an area equal to the size of the bracket base. The metal brackets were bonded with Transbond XT, and bond strength was evaluated in a universal test machine. RESULTS: There was a statistical correlation (P < .01) between the longitudinal and transverse roughness measurements. There was no correlation between roughness measurements (longitudinal and transverse) and bond strength (P > .05), nor was there a correlation between total roughness (longitudinal Ra and transverse Ra) and bond strength. The Student's t-test showed that there was a statistically significant difference (P < .05) between longitudinal and transverse roughness. CONCLUSION: The transverse roughness is greater than the longitudinal roughness, there is a strong correlation between longitudinal and transverse roughness, and there is no correlation between enamel roughness and bond strength.

Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement.

The aim of this study was to assess the influence of etching and light-curing time on the shear bond strength (SBS) and adhesive remnant index (ARI) of a resin-modified glass ionomer cement (RMGIC) upon debonding of orthodontic brackets. Sixty-eight bovine permanent incisors were obtained and embedded in acrylic resin. Edgewise metallic brackets were bonded to the teeth with Fuji Ortho LC RMGIC. The specimens were randomly assigned to 4 groups, using the following etching and light-curing times: G1: 10% polyacrylic acid and 40 s (control); G2: 37% phosphoric acid and 40 s; G3: 10% polyacrylic acid and 50 s; and G4: 37% phosphoric acid and 50 s. Shear test was performed at 0.5 mm/min and the ARI was assessed. G2 (3.6 ± 0.98 MPa) presented significantly higher (p<0.05) SBS than G1 (2.76 ± 0.86 MPa) and G4 (2.86 ± 0.68 MPa), and there was no statistically significant difference (p>0.05) between G2 and G3 (2.94 ± 0.67 MPa). ARI presented prevalence of scores 2 and 3 in all groups. RMGIC SBS enhanced with 37% phosphoric acid etching and 40 s light-curing time, but this did not occur when the light-curing time was increased, regardless of the acid used. RMGIC presented prevalence of failures at the adhesive/bracket interface.

Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

The aim of this study was to assess the influence of etching and light-curing time on the shear bond strength (SBS) and adhesive remnant index (ARI) of a resin-modified glass ionomer cement (RMGIC) upon debonding of orthodontic brackets. Sixty-eight bovine permanent incisors were obtained and embedded in acrylic resin. Edgewise metallic brackets were bonded to the teeth with Fuji Ortho LC RMGIC. The specimens were randomly assigned to 4 groups, using the following etching and light-curing times: G1: 10 percent polyacrylic acid and 40 s (control); G2: 37 percent phosphoric acid and 40 s; G3: 10 percent polyacrylic acid and 50 s; and G4: 37 percent phosphoric acid and 50 s. Shear test was performed at 0.5 mm/min and the ARI was assessed. G2 (3.6 ± 0.98 MPa) presented significantly higher (p<0.05) SBS than G1 (2.76 ± 0.86 MPa) and G4 (2.86 ± 0.68 MPa), and there was no statistically significant difference (p>0.05) between G2 and G3 (2.94 ± 0.67 MPa). ARI presented prevalence of scores 2 and 3 in all groups. RMGIC SBS enhanced with 37 percent phosphoric acid etching and 40 s light-curing time, but this did not occur when the light-curing time was increased, regardless of the acid used. RMGIC presented prevalence of failures at the adhesive/bracket interface.

O objetivo desta pesquisa foi avaliar a influência do condicionamento ácido e do tempo de fotopolimerização na Resistência Adesiva (RA) e no Índice de Adesivo Remanescente (IAR) do Cimento Ionômero de Vidro Modificado por Resina (CIVMR). Sessenta e oito incisivos permanentes de bovinos foram obtidos e incluídos em resina acrílica. Bráquetes metálicos edgewise foram colados nesses corpos de prova com o CIVMR Fuji Ortho. A amostra foi dividida em 4 grupos, utilizando os seguintes condicionamentos ácidos e tempos de fotopolimerização: G1- Ácido poliacrílico a 10 por cento e 40 s (controle); G2- Ácido fosfórico a 37 por cento e 40 s; G3- Ácido poliacrílico a 10 por cento e 50 s; e G4- Ácido fosfórico a 37 por cento e 50 s. O teste de cisalhamento foi realizado a 0,5 mm/min e o IAR avaliado. O G2 (3,6 ± 0,98 MPa) apresentou RA estatisticamente maior que o G1 (2,76 ± 0,86 MPa) e o G4 (2,86 ± 0,68 MPa) (p<0,05), e não houve diferença estatística entre G2 e G3 (2,94 ± 0,67 MPa) (p>0,05). O IAR apresentou prevalência dos escores 2 e 3 em todos os grupos. A RA do CIVMR aumenta com condicionamento com ácido fosfórico a 37 por cento e 40 s de fotopolimerização, mas isto não ocorre quando o tempo de fotopolimerização é aumentado, independente do tipo de ácido utilizado; e o CIVMR apresenta prevalência de fratura na interface adesivo/bráquete.