Avaliação da capacidade antimicrobiana dos sistemas adesivos

Introduction: The aim of this research was to evaluate the antimicrobial ability of adhesive systems and to study the relationship between acidity and the antimicrobial ability of conventional adhesive systems and self-etching adhesive systems and acid etching. Methods: Two conventional adhesive systems were used, Adper™ Single Bond 2 and OptiBond™ S, along with two self-etching systems, Scotchbond™ Universal and OptiBond™ All-In-One systems, as well as two acid etching systems, etch-37™ and select hv™ etch w / bac. For this experiment, an agar diffusion test was performed using three bacteria, Streptococcus mutans, Lactobacillus casei and Actinomyces odontolyticus, to measure the inhibition zone of the substances studied. The pH of those substances was also evaluated. Results: The acid etchings showed the highest inhibition zones against the three bacteria as well as lower pH values than those of the self-etching adhesive systems, followed by conventional adhesive systems, which showed the lower halos or demonstrated no antimicrobial ability against certain bacteria. Conclusions: The acid etchings and self-etching adhesive systems were found to have greater antimicrobial activity than conventional adhesive systems against Streptococcus mutans, Lactobacillus casei and Actinomyces odontolyticus. It was also found that the more acidic the substances studied were, the greater their antimicrobial ability.Introducción: el objetivo de este trabajo de investigación fue evaluar la capacidad antimicrobiana de los sistemas adhesivos, así como estudiar la relación entre la acidez y la capacidad antimicrobiana de los sistemas adhesivos convencionales, los autoacondicionadores y el grabado ácido. Métodos: se utilizaron dos sistemas adhesivos convencionales, Adper™ Single Bond 2 y OptiBond™ S, dos autoacondicionadores, Scotchbond™ Universal y OptiBond™ All-In-One, y dos grabados ácidos, etch-37™ y select hv™ etch w/bac. Para este experimento se realizó una prueba de difusión en Agar utilizando tres bacterias, Streptococcus mutans, Lactobacillus casei y Actinomyces odontolyticus, para medir el halo de inhibición de las sustancias estudiadas. También fue evaluado el pH que poseen dichas sustancias. Resultados: los grabados ácidos presentaron los mayores halos de inhibición contra las tres bacterias, así como los valores menores de pH que los sistemas adhesivos autoacondicionadores, seguido de los sistemas adhesivos convencionales que presentaron los menores halos o no presentaron ninguna capacidad antimicrobiana contra algunas de las bacterias. Conclusiones: se mostró que los grabados ácidos y los sistemas adhesivos autoacondicionadores presentaron mayor capacidad antimicrobiana que los sistemas adhesivos convencionales contra Streptococcus mutans, Lactobacillus casei y Actinomyces odontolyticus. A su vez se comprobó que mientras más ácidas fueron las sustancias estudiadas, mayor resultó la capacidad antimicrobiana.  Introdução: o objetivo deste trabalho de pesquisa foi avaliar a capacidade antimicrobiana dos sistemas adesivos, bem como estudar a relação entre a acidez e a capacidade antimicrobiana dos sistemas adesi-vos convencionais, os autocondicionadores e o condicionamento ácido. Métodos: utilizaram-se dois sistemas adesivos convencionais, Adper™Single Bond 2 e OptiBond™ S, dois autocondicionadores, Scotchbond™Universal e OptiBond™ All-In-One, dois condicionamentos ácidos, etch-37™e select hv™etch w/bac. Para este experimento, realizou-se uma prova de difusão em Agar que utiliza três bactérias, Streptococcus mutans, Lactobacillus casei e Actinomyces odontolyticus, para medir o halo de inibição das substâncias estudadas. Também foi avaliado o pH que possuem essas substâncias. Resultados: os condicionamentos ácidos apresentaram os maiores halos de inibição contra as três bactérias, bem como os valores menores de pH que os sistemas adesivos autocondicio-nadores, seguido dos sistemas adesivos convencionais que apresentaram os menores halos ou não apresentaram nenhuma capacidade antimi-crobiana contra algumas das bactérias. Conclusões: constatou-se que os condicionamentos ácidos e os sistemas adesivos autocondicionadores apresentaram uma maior capacidade antimicrobiana que os sistemas adesivos convencionais contra Streptococcus mutans, Lactobacillus casei e Actinomyces odontolyticus. Por sua vez, comprovou-se que, quanto mais ácidas fossem as substâncias estudadas, maior resultava a capacidade an-timicrobiana

Epidemiology of pertussis in two Ibero-American countries with different vaccination policies: lessons derived from different surveillance systems

Background Pertussis is a re-emerging disease worldwide despite its high vaccination coverage. European and Latin-American countries have used different surveillance and vaccination policies against pertussis. We compared the epidemiology of this disease in two Ibero-American countries with different vaccination and surveillance policies. Methods We compared the epidemiology of pertussis in Spain and the Dominican Republic (DR). We present a 10-year observational study of reported pertussis based on suspected and/or probable cases of pertussis identified by the national mandatory reporting system in both countries between 2005 and 2014. Both countries have a similar case definition for pertussis surveillance, although Spain applies laboratory testing, and uses real time PCR and/or culture for case confirmation while in DR only probable and/or suspected cases are reported. We analyzed incidence, hospitalization, case-fatality rates, mortality and vaccination coverage. Results The average annual incidence in children aged <1 year was 3.40/100,000 population in Spain and 12.15/100,000 in DR (p = 0.01). While the incidence in DR was generally higher than in Spain, in 2011 it was six times higher in Spain than in DR. The highest infant mortality in Spain was 0.017/100,000 in 2011, and the highest in DR was 0.08/100,000 in 2014 (p = 0.01). The proportion of hospitalized cases per year among children <1 year varied between 22.0% and 93.7% in Spain, and between 1.1% and 29.4% in DR (p = 0.0002), while mortality varied from 0 to 0.017 and 0 to 0.08 per 100,000 population in Spain and DR, respectively (p = 0.001). Vaccination coverage was 96.5% in Spain and 82.2% in DR (p = 0.001). Conclusions Pertussis is a public health problem in both countries. Surveillance, prevention and control measures should be improved, especially in DR. Current vaccination programs are not sufficient for preventing continued pertussis transmission, even in Spain which has high vaccination coverag

Avaliação da eficácia da esterilização do instrumental odontológico na clínica de odontologia de Unibe

Introduction: In the field of dentistry, one way to prevent cross-contamination between patients is by eliminating blood waste and other fluids that have been obtained during the use of instruments. The objective of this research was to evaluate the effectiveness of autoclaving dental instruments in the areas of Endodontics and Periodontics. Methods: An in-vitro, experimental and cross-sectional study was performed on a population of 75 students in comprehensive clinics iii, iv and v at the Unibe dental clinic. 60 samples were taken using smears, which were then inoculation on chromo-agar orientation petri plates and subsequently incubated. The sample consisted of: 10 endodontic files in closed boxes before sterilization in the autoclave, the same 10 endodontic files after sterilization in the autoclave, 10 periodontal instruments (curettes and scalers) before and after sterilization in the autoclave with cloths in perforated boxes, and 10 periodontal instruments before and after sterilization in the autoclave with pouches in perforated boxes.&nbsp; Conclusion: 60% of the endodontic files after sterilization were found not to be contaminated and 69% for both cloths and pouches had no contamination.Introducción: en el área de la odontología, una de las maneras para prevenir que se produzca una contaminación cruzada entre pacientes es eliminando los residuos de sangre y otros fluidos que han sido obtenidos durante la utilización de los instrumentos. El objetivo de esta investigación es evaluar la eficacia de la esterilización en la autoclave del instrumental odontológico del Área de Endodoncia y Periodoncia. Métodos: se realizó un estudio in vitro, experimental y transversal en una población de 75 estudiantes que se encuentran en la clínica integral III, IV y V de la clínica dental de Unibe. Se tomaron 60 muestras, a las cuales se les realizó un frotis; estas fueron inoculadas en placas petris cromo-agar orientación y posteriormente incubadas. La muestra estuvo constituida por 10 limas endodónticas en cajas cerradas antes de esterilizar en la autoclave, 10 limas endodónticas después de esterilizar en la autoclave, 10 instrumentos periodontales (curetas y jaquetes) antes de esterilizar en paños en la autoclave en cajas perforadas, 10 de los mismos instrumentos después de esterilizar en paños en la autoclave, 10 instrumentos periodontales antes de esterilizar en fundas en la autoclave en cajas perforadas y estas mismas 10 después de haber sido esterilizadas en fundas en la autoclave. Conclusión: se determinó que el 60% de las limas, después de esterilizar, no estaba contaminado y que el 69%, para ambos paños y fundas, no presentaba contaminación. &nbsp;Introdução: na área da odontologia, uma das maneiras para prevenir que se produza uma contaminação cruzada entre pacientes é quando se eliminam os resíduos de sangue e outros fluídos que foram obtidos durante a utilização dos instrumentos. O objetivo desta pesquisa é avaliar a eficácia da esterilização na autoclave do instrumental odon-tológico da Área de Endodontia e Periodontia. Métodos: realizou-se um estudo in vitro, experimental e transversal na população de 75 estudantes que se encontram na clínica integral iii, iv e v da clínica dental de Uni-be. Tomaram-se 60 amostras, nas quais foi realizado um esfregaço; estas foram inoculadas em placas de Petri cromo-agar orientação e, posterior-mente, incubadas. A amostra esteve constituída por 10 limas endodôn-ticas em caixas fechadas antes de esterilizar na autoclave, 10 limas endo-dônticas depois de esterilizar na autoclave, 10 instrumentos periodontais (curetas e jaquetas) antes de esterilizar em panos na autoclave em caixas perfuradas, 10 dos mesmos instrumentos depois de esterilizar em panos autoclave, 10 instrumentos periodontais antes de esterilizar em bolsas de autoclave em caixas perfuradas e estas mesmas 10 depois de terem sido esterilizadas em bolsas na autoclave. Conclusão: determinou-se que 60% das limas, depois de esterilizar, não estavam contaminadas e que 69%, para ambos os panos e bolsas, não apresentavam contaminação

Knowledge of dentistry students and clinical dentists in the Dominican Republic regarding their photoactivation equipment and protocols

The aim of this thesis was to evaluate and show undergraduate students the technical characteristics and measurement of the irradiance of their photoactivation devices, as well as to assess the knowledge of Dominican dentists about the technical characteristics and photoactivation protocols. The work was divided into two studies: (1) a conference accompanied by the equipment in an in vitro experiment and (2) application of a questionnaire to dentists in the Dominican Republic. In the first study, a group of 30 students received a theoretical class on photopolymerization and were invited to present themselves with their photoactivation devices for measurement. Each student measured the irradiance of their equipment using a spectroradiometer and a digital radiometer with distances of 0 mm and 6 mm. All light curing lights used by the students were classified as budget equipment. The irradiation values were influenced by the equipment used to assess this characteristic (radiometer or spectrophotometer) and by the distance (0mm or 6mm). The second study involved the development of a self-administered online questionnaire, consisting of five sections, to inquire about: 1. Professional profile and sociodemographic data; 2. Technical characteristics of the device; 3. Evaluation of the technical characteristics of the device; 4. Knowledge about the risk of eye damage; and 5. Features to consider when purchasing new equipment. The final questionnaire was written in Google Forms and consisted of 60 mandatory questions. A total of 374 valid responses were received in 10 days. The mean difference was calculated using a T-student test and the amount of intensity reduction produced by distance was also calculated as a percentage. Univariate statistical analysis and bivariate analysis between different groups of variables were performed on the questionnaire data. Categorical variables were evaluated using the chi-square test. In cases where Likert scale variables were present, the Kruskall-Wallis statistical test was performed to establish differences in the scores obtained between the groups. Dominican dentists recognize that it is extremely important to know the technical characteristics of their equipment, although most are unaware of the technical details of their devices. They also don't have a good understanding of the effects of blue light on vision. With this thesis we can conclude that Dominican students and dentists are unaware of the technical characteristics of their equipment and how these details can affect the photoactivation quality of light curing of resin materials.Sem bolsaO objetivo desta tese foi avaliar e mostrar aos alunos de graduação as características técnicas e mensuração da irradiância de seus dispositivos de fotoativação bem como avaliar o conhecimento de dentistas dominicanos sobre as características técnicas e protocolos de fotoativação. O trabalho foi dividido em dois estudos: (1) uma conferência acompanhada dos equipamentos em um experimento in vitro e (2) aplicação de um questionário aos cirurgiões-dentistas da Republica Dominicana. No primeiro estudo, um grupo de 30 alunos recebeu uma aula teórica sobre fotoativação e foram convidados a se apresentarem com seus dispositivos para aferição. Cada aluno mediu a irradiância de seu equipamento por meio de um espectroradiômetro e um radiômetro digital com distâncias de 0 mm e 6 mm. Todos os fotopolimerizadores utilizados pelos alunos foram classificados como equipamentos de baixo custo. Os valores de irradiação foram influenciados pelo equipamento utilizado para avaliar esta característica (radiômetro ou espectroradiômetro) e pela distância (0mm ou 6mm). O segundo estudo envolveu a elaboração de um questionário online autoaplicável, composto por cinco seções, para indagar sobre: 1. Perfil profissional e dados sociodemográficos; 2. Características técnicas do dispositivo; 3. Avaliação das características técnicas do dispositivo; 4. Conhecimento sobre o risco de lesões oculares; e 5. Recursos a serem considerados ao adquirir novos equipamentos. O questionário final foi escrito no Formulários Google e consistia em 60 perguntas obrigatórias. Um total de 374 respostas válidas foram recebidas em 10 dias. Foi calculada a diferença de média com o test T-student e a quantidade de redução de intensidade produzida pela distância também foi calculada em porcentagem. Nos dados do questionario foram realizada análise estatística univariada e uma análise bivariada entre diferentes grupos de variáveis. As variáveis categóricas foram avaliadas com o teste do qui-quadrado. Nos casos de variáveis do tipo escala Likert, foi realizado o teste estatístico Kruskall-Wallis para estabelecer diferenças nos escores obtidos entre os grupos. Os dentistas dominicanos reconhecem que é extremamente importante conhecer as características técnicas de seus equipamentos, embora a maioria não tenha conhecimento dos detalhes técnicos de seus dispositivos. Eles também não têm boa compreensão dos efeitos da luz azul na visão. Com esta tese podemos concluir que estudantes e dentistas dominicanos desconhecem as características técnicas de seus equipamentos e como esses detalhes podem afetar a qualidade da fotoativação de materiais odontológicos fotoativados

Avaliação da capacidade antimicrobiana dos sistemas adesivos

Introducción: el objetivo de este trabajo de investigación fue evaluar la capacidad antimicrobiana de los sistemas adhesivos, así como estudiar la relación entre la acidez y la capacidad antimicrobiana de los sistemas adhesivos convencionales, los autoacondicionadores y el grabado ácido. Métodos: se utilizaron dos sistemas adhesivos convencionales, Adper™ Single Bond 2 y OptiBond™ S, dos autoacondicionadores, Scotchbond™ Universal y OptiBond™ All-In-One, y dos grabados ácidos, etch-37™ y select hv™ etch w/bac. Para este experimento se realizó una prueba de difusión en Agar utilizando tres bacterias, Streptococcus mutans, Lactobacillus casei y Actinomyces odontolyticus, para medir el halo de inhibición de las sustancias estudiadas. También fue evaluado el pH que poseen dichas sustancias. Resultados: los grabados ácidos presentaron los mayores halos de inhibición contra las tres bacterias, así como los valores menores de pH que los sistemas adhesivos autoacondicionadores, seguido de los sistemas adhesivos convencionales que presentaron los menores halos o no presentaron ninguna capacidad antimicrobiana contra algunas de las bacterias. Conclusiones: se mostró que los grabados ácidos y los sistemas adhesivos autoacondicionadores presentaron mayor capacidad antimicrobiana que los sistemas adhesivos convencionales contra Streptococcus mutans, Lactobacillus casei y Actinomyces odontolyticus. A su vez se comprobó que mientras más ácidas fueron las sustancias estudiadas, mayor resultó la capacidad antimicrobiana.  Introdução: o objetivo deste trabalho de pesquisa foi avaliar a capacidade antimicrobiana dos sistemas adesivos, bem como estudar a relação entre a acidez e a capacidade antimicrobiana dos sistemas adesi-vos convencionais, os autocondicionadores e o condicionamento ácido. Métodos: utilizaram-se dois sistemas adesivos convencionais, Adper™Single Bond 2 e OptiBond™ S, dois autocondicionadores, Scotchbond™Universal e OptiBond™ All-In-One, dois condicionamentos ácidos, etch-37™e select hv™etch w/bac. Para este experimento, realizou-se uma prova de difusão em Agar que utiliza três bactérias, Streptococcus mutans, Lactobacillus casei e Actinomyces odontolyticus, para medir o halo de inibição das substâncias estudadas. Também foi avaliado o pH que possuem essas substâncias. Resultados: os condicionamentos ácidos apresentaram os maiores halos de inibição contra as três bactérias, bem como os valores menores de pH que os sistemas adesivos autocondicio-nadores, seguido dos sistemas adesivos convencionais que apresentaram os menores halos ou não apresentaram nenhuma capacidade antimi-crobiana contra algumas das bactérias. Conclusões: constatou-se que os condicionamentos ácidos e os sistemas adesivos autocondicionadores apresentaram uma maior capacidade antimicrobiana que os sistemas adesivos convencionais contra Streptococcus mutans, Lactobacillus casei e Actinomyces odontolyticus. Por sua vez, comprovou-se que, quanto mais ácidas fossem as substâncias estudadas, maior resultava a capacidade an-timicrobiana.Introduction: The aim of this research was to evaluate the antimicrobial ability of adhesive systems and to study the relationship between acidity and the antimicrobial ability of conventional adhesive systems and self-etching adhesive systems and acid etching. Methods: Two conventional adhesive systems were used, Adper™ Single Bond 2 and OptiBond™ S, along with two self-etching systems, Scotchbond™ Universal and OptiBond™ All-In-One systems, as well as two acid etching systems, etch-37™ and select hv™ etch w / bac. For this experiment, an agar diffusion test was performed using three bacteria, Streptococcus mutans, Lactobacillus casei and Actinomyces odontolyticus, to measure the inhibition zone of the substances studied. The pH of those substances was also evaluated. Results: The acid etchings showed the highest inhibition zones against the three bacteria as well as lower pH values than those of the self-etching adhesive systems, followed by conventional adhesive systems, which showed the lower halos or demonstrated no antimicrobial ability against certain bacteria. Conclusions: The acid etchings and self-etching adhesive systems were found to have greater antimicrobial activity than conventional adhesive systems against Streptococcus mutans, Lactobacillus casei and Actinomyces odontolyticus. It was also found that the more acidic the substances studied were, the greater their antimicrobial ability

Epidemiology of pertussis in two Ibero-American countries with different vaccination policies: lessons derived from different surveillance systems

BACKGROUND: Pertussis is a re-emerging disease worldwide despite its high vaccination coverage. European and Latin-American countries have used different surveillance and vaccination policies against pertussis. We compared the epidemiology of this disease in two Ibero-American countries with different vaccination and surveillance policies. METHODS: We compared the epidemiology of pertussis in Spain and the Dominican Republic (DR). We present a 10-year observational study of reported pertussis based on suspected and/or probable cases of pertussis identified by the national mandatory reporting system in both countries between 2005 and 2014. Both countries have a similar case definition for pertussis surveillance, although Spain applies laboratory testing, and uses real time PCR and/or culture for case confirmation while in DR only probable and/or suspected cases are reported. We analyzed incidence, hospitalization, case-fatality rates, mortality and vaccination coverage. RESULTS: The average annual incidence in children aged <1 year was 3.40/100,000 population in Spain and 12.15/100,000 in DR (p = 0.01). While the incidence in DR was generally higher than in Spain, in 2011 it was six times higher in Spain than in DR. The highest infant mortality in Spain was 0.017/100,000 in 2011, and the highest in DR was 0.08/100,000 in 2014 (p = 0.01). The proportion of hospitalized cases per year among children <1 year varied between 22.0% and 93.7% in Spain, and between 1.1% and 29.4% in DR (p = 0.0002), while mortality varied from 0 to 0.017 and 0 to 0.08 per 100,000 population in Spain and DR, respectively (p = 0.001). Vaccination coverage was 96.5% in Spain and 82.2% in DR (p = 0.001). CONCLUSIONS: Pertussis is a public health problem in both countries. Surveillance, prevention and control measures should be improved, especially in DR. Current vaccination programs are not sufficient for preventing continued pertussis transmission, even in Spain which has high vaccination coverage.Sincere thanks go to CIBER Epidemiology and Public Health, CIBERESP-Spain for funding this study, because through the concession of a aid for a short stay abroad to Ruben Solano, to complete the title international of PhD in Medicine.S

Casos de parálisis flácida aguda reportados para descartar polio en la República Dominicana entre 2001 y 2017: revisión de sus factores etiopatológicos

Introduction:In 2001, after an 18 case Polio outbreak near Constanza, Public Health Ministry and Panamerican Health Organization agreed to review within 60 days, cases of Acute Flaccid Paralysis (AFP), supervised by neurology specialists. Both institutions published epidemic’s features while JRS/CJSW performed electromyogram. Methods: After culture, reports and neurological examination, diagnosis of eleven categories was recorded. Sample included 188 male, 148 female. Results: Poliomyelitis cases (18) irregularly immunized cases were included; PNS Guillain-Barré syndromes (84) were most frequent AFP, 2 fatalities coincided with short, intervals between previous illness and GBS, one due to vaccination. (polio relates to membrane D55 vulnerability, GBS to protein mimicry, the rest to cytokines); transverse myelitis plus Acute disseminated encephalomyelitis (58) with immune pathology caused by initial infections like chicken pox; In CNS, encephalitis or meningitis (49) were identified by increased reflexes and spasticity rather than flaccidity; peripheral neuropathy, (23) with scarce glove/ stocking cases, more with mononeuropathy, important because of its asymmetry; myopathy (25) having known past Streptococcal event. Severe arthropaties were included because functional weakness resembled Polio, plus 4 Sydenham’s chorea; enterovirus (16): a relatively new entity for AFP: found easily by positive stool identification; Vasculitis (11): a rarely diagnosed CVA. Cerebral tumors (10) found by CAT/MRI scanning, having 2 postoperative fatalities. Asymmetric weaknesses (15) casting doubt for motoneurone involvement, but none was showing stool confirmation of poliovirus. Normal Neurological examination in 24, without laboratory evidence to arrive at diagnosis. Three parents refused reviewing. Conclusion: Besides making sure absence of new cases of polio by examining all reported AFP cases. On reviewing its literature we have contributed in knowing its clinical variety and pathology.Introducción: Tras 18 casos de poliomielitis descubiertos al final del 2000, en Constanza, el Ministerio de Salud Pública (MSP) y la Organización Panamericana de la Salud (OPS), comparten la responsabilidad de revisar, a los 60 días, todos los casos de Parálisis Flácidas Agudas (PFA). Para examinarlos se nombra un comité de pro­fesores (Tolentino, Mendoza, Santoni). Las entidades comprometidas habían publicado las características clí­nico-epidemiológicas del brote, mientras que J.Santoni y C.Santoni Williams publican su electromiografía. Para este artículo se revisa la literatura de etiopatogenias en la PFA y polio. Métodos: Se citan 336 casos acompañados por encargados comunitarios, 188 varones, 148 hembras, edad promedio: 6.2 años. Se revisa: evolución, imágenes, analítica, cultivo viral en heces. Así mismo, diagnóstico y clasificación tras examen neurológico. Resultados: Casos de poliomielitis (18), de 1 a 13 años: todos vacunados irregularmente. Citamos patología de membrana CD155 y del cañón neuronal. Describimos los casos de PFA en orden descendente; síndromes de Guillain-Barré (84), 10 de ellos Miller-Fisher; evolución moderada, 2 fallecidos. Se atribuye a mímica proteica de oligosacáridos. Casos de FPA que involucran a las cito­kinas; mielitis y encefalomielitis diseminada agudas (58); encefalitis, meningitis, cerebelitis (49); polineuritis/mono­neuritis (23); miopatías relacionadas a Estreptococias (25) con sus 6 Coreas por mímica proteica anti-lysogangliosi­do GM1; procesos entero virales (16), vasculitis con ACV escasos (11), tumores (10). Finalmente, encontramos 15 con exámenes asimétricos sospechosos de motoneurona lesionada, pero todos con cultivos fecales de poliovirus negativos; y 24 exámenes neurológicos normales, pero sin causa. Aceptamos 3 inasistencias. Conclusión: Demostramos la ausencia de nuevos casos de polio y actualizamos la clasificación de las PFA. Revisando sus etiopatogenias las entendemos mejor

Influence of different light curing units on the bond strength of indirect resin composite restorations

The aim of this study was to evaluate the influence of different light sources on the bond strength of indirect resin composite restorations cemented with a dual-cure resin cement. The superficial dentin of human third molars was exposed and acid-etched and an adhesive system was applied (Single Bond 2). Four-mm-thick indirect resin composite restorations (Gradia) were fabricated and cemented using a dual-cure resin cement (Rely X). Four light sources were used to polymerize the cement: QTH - Optilux 401; LED1 - L.E.Demetron 1; LED2 - Optilight CL; and LED3 - Ultralume 5. The teeth were stored for 24 h and then sectioned, yielding stick-shaped specimens for each group with a bonded area of 1.0 mm². The specimens were then tested in a universal testing machine, at a crosshead speed of 1 mm/min. Data were analyzed using ANOVA. Bond strength mean values were: QTH: 22.5 (± 8.4); LED1: 22.7 (± 9.4); LED2: 21.4 (± 10.2); and LED3: 27.3 (± 13.8). No statistically significant difference was observed among the experimental groups. The bond strength values when the cement was polymerized using different LED lights were equivalent to the values when the QTH light was used. It can be concluded that the variety of light sources used in the present study did not influence the bond strength of indirect resin composite restorations cemented with a dual-cure resin cement