RESUMO

Coloured compounds (anthocyanins) in açaí can stain resin-modified glass-ionomer cement (RMGIC) due to its low staining resistance. AIM: The aim of this study was to assess whether açaí compromises the surface colour and roughness of RMGIC in vitro. MATERIALS AND METHOD: Disc-shaped specimens (2 mm thick, 8 mm in diameter) of Vitremer™ (3M ESPE, St Paul, MN, USA) were prepared according to the manufacturer 's instructions. The mixture was inserted into a silicone mouldplaced between two mylar strips, and light cured. Specimens were randomly divided into three groups (n=25) according to the solutions to be used for chemical degradation: artificial saliva (control), açaí sorbet and açaí juice. A spectrophotometer CM-2600d/2500d (Konica Minolta, Tokyo, Japan) was used to analyse the colour (CIELa*b* scale). Surface roughness (Ra, mm) was measuredusing theprofilometer Surfcorder SE 1700 (Kosaka Corp, Tokyo, Japan). The specimens were subjected to three daily soaks (6 ml, 15 minutes) for 14 days at 37°C. They were washed in distilled water and placed in fresh saliva (30 minutes in the interval). After the third soak in a day, they were stored in fresh saliva overnight. Outcomes were analysed at baseline (L*, a*, b*, Ra) and after degradation (L'*, a'*, b'*, Ra'). RESULTS: The pH values of saliva, sorbet, and juice were 7.0, 3.8, and 4.9, respectively. ΔE* values were 6.6 for saliva, 6.9 for sorbet and 7.8 for juice. There was a significant ΔE* difference between saliva (p=0.005) and juice (p=0.002), and between juice and sorbet (p=0.019), but none between saliva and sorbet (p=0.401). There was no significant Δb* difference between the solutions. No difference between juice and sorbet was observed for Δa*, but they were significantly different from saliva (p<0.001). Brightness (L*) changed significantly. Juice showed the highest ΔE* (7.8) and ΔL* (7.7). No significant change was observed for roughness and there was no difference between the solutions for ARa. CONCLUSIONS: Açaí and saliva led to unacceptable staining, but no significant roughness changes in the resin-modified glass-ionomer cement.

As antocianinas presentes no açaí podem manchar o cimento de ionomero de vidro modificado por resina (CIVMR) devido a baixa resistencia ao manchamento do material. OBJETIVO: O objetivo desse estudo foi avaliar se o açaí compromete a cor e a rugosidade de superficie de um CIVMR in vitro. MATERIAIS E MÉTODOS: Amostras (2 mm de espessura, 8 mm de diámetro) de Vitremer™ (3M ESPE, St Paul, MN, USA) foram preparadas de acordo com as instrugoes do fabricante. O materialfoi espatulado, inserido em um molde de silicone colocado entre duas tiras de poliestireno e fotopolimerizado. Após, as amostras foram randomizadas e alocadas em tres grupos (n=25) de acordo com as solugoes usadas para a degradagao química: saliva artificial (controle) e sorbet de açaí e suco de açaí. Utilizou-se o espectrofotometro CM-2600d/2500d (Konica Minolta, Tokyo, Japan) para a análise da cor (escala CIELa*b*) e o rugosímetro Surfcorder SE 1700 (Kosaka Corp, Tokyo, Japan) para a rugosidade de superficie (Ra, mm). As amostras foram submetidas a tres imersoes diárias (6 ml, 15 minutos) em cada solugao por 14 dias a 37°C, tendo sido lavadas em água destilada e mantidas em saliva fresca (30 minutos) nos intervalos. Após a terceira imersao no dia, as amostras foram mantidas em saliva renovada até o dia seguinte. As variáveis foram analisadas antes (L*, a*, b*, Ra) e depois da degradagao química (L'*, a'*, b'*, Ra'). RESULTADOS: Os valores de pH da saliva, sorbet e suco foram, respectivamente 7,0, 3,8 e 4,9. Houve diferenga significante para ΔE* entre saliva (p=0.005) e suco (p=0.002) e entre suco e sorbet (p=0.019), mas nao entre saliva e sorbet (p=0.401). Nao foi observada diferenga significante para Δb* entre as solugoes. Nao houve diferenga significante para Δa* entre suco e sorbet, mas eles foram significativamente diferentes da saliva (p<0.001). A luminosidade (L*) mostrou alteragao significante. O suco mostrou os maiores valores de ΔE* (7,8) e ΔL* (7,7)". Nao houve mudanga significante para a rugosidade e nao foi observada diferenga significante entre as solugoes para ARa (p>0.05). CONCLUSÃO: O açaí e a saliva causaram manchamento inaceitável do glaze do CIVMR e insignificante alteragao da rugosidade.

Assuntos

RESUMO

ABSTRACT Coloured compounds (anthocyanins) in açaí can stain resin-modified glass-ionomer cement (RMGIC) due to its low staining resistance. Aim The aim of this study was to assess whether açaí compromises the surface colour and roughness of RMGIC in vitro. Materials and Method Disc-shaped specimens (2 mm thick, 8 mm in diameter) of Vitremer™ (3M ESPE, St Paul, MN, USA) were prepared according to the manufacturer 's instructions. The mixture was inserted into a silicone mouldplaced between two mylar strips, and light cured. Specimens were randomly divided into three groups (n=25) according to the solutions to be used for chemical degradation: artificial saliva (control), açaí sorbet and açaí juice. A spectrophotometer CM-2600d/2500d (Konica Minolta, Tokyo, Japan) was used to analyse the colour (CIELa*b* scale). Surface roughness (Ra, mm) was measuredusing theprofilometer Surfcorder SE 1700 (Kosaka Corp, Tokyo, Japan). The specimens were subjected to three daily soaks (6 ml, 15 minutes) for 14 days at 37°C. They were washed in distilled water and placed in fresh saliva (30 minutes in the interval). After the third soak in a day, they were stored in fresh saliva overnight. Outcomes were analysed at baseline (L*, a*, b*, Ra) and after degradation (L'*, a'*, b'*, Ra'). Results The pH values of saliva, sorbet, and juice were 7.0, 3.8, and 4.9, respectively. ΔE* values were 6.6 for saliva, 6.9 for sorbet and 7.8 for juice. There was a significant ΔE* difference between saliva (p=0.005) and juice (p=0.002), and between juice and sorbet (p=0.019), but none between saliva and sorbet (p=0.401). There was no significant Δb* difference between the solutions. No difference between juice and sorbet was observed for Δa*, but they were significantly different from saliva (p<0.001). Brightness (L*) changed significantly. Juice showed the highest ΔE* (7.8) and ΔL* (7.7). No significant change was observed for roughness and there was no difference between the solutions for ARa. Conclusions Açaí and saliva led to unacceptable staining, but no significant roughness changes in the resin-modified glass-ionomer cement.

RESUMO As antocianinas presentes no açaí podem manchar o cimento de ionomero de vidro modificado por resina (CIVMR) devido a baixa resistencia ao manchamento do material. Objetivo O objetivo desse estudo foi avaliar se o açaí compromete a cor e a rugosidade de superficie de um CIVMR in vitro. Materials e Método Amostras (2 mm de espessura, 8 mm de diámetro) de Vitremer™ (3M ESPE, St Paul, MN, USA) foram preparadas de acordo com as instrugoes do fabricante. O materialfoi espatulado, inserido em um molde de silicone colocado entre duas tiras de poliestireno e fotopolimerizado. Após, as amostras foram randomizadas e alocadas em tres grupos (n=25) de acordo com as solugoes usadas para a degradagao química: saliva artificial (controle) e sorbet de açaí e suco de açaí. Utilizou-se o espectrofotometro CM-2600d/2500d (Konica Minolta, Tokyo, Japan) para a análise da cor (escala CIELa*b*) e o rugosímetro Surfcorder SE 1700 (Kosaka Corp, Tokyo, Japan) para a rugosidade de superficie (Ra, mm). As amostras foram submetidas a tres imersoes diárias (6 ml, 15 minutos) em cada solugao por 14 dias a 37°C, tendo sido lavadas em água destilada e mantidas em saliva fresca (30 minutos) nos intervalos. Após a terceira imersao no dia, as amostras foram mantidas em saliva renovada até o dia seguinte. As variáveis foram analisadas antes (L*, a*, b*, Ra) e depois da degradagao química (L'*, a'*, b'*, Ra'). Resultados Os valores de pH da saliva, sorbet e suco foram, respectivamente 7,0, 3,8 e 4,9. Houve diferenga significante para ΔE* entre saliva (p=0.005) e suco (p=0.002) e entre suco e sorbet (p=0.019), mas nao entre saliva e sorbet (p=0.401). Nao foi observada diferenga significante para Δb* entre as solugoes. Nao houve diferenga significante para Δa* entre suco e sorbet, mas eles foram significativamente diferentes da saliva (p<0.001). A luminosidade (L*) mostrou alteragao significante. O suco mostrou os maiores valores de ΔE* (7,8) e ΔL* (7,7)". Nao houve mudanga significante para a rugosidade e nao foi observada diferenga significante entre as solugoes para ARa (p>0.05). Conclusao O açaí e a saliva causaram manchamento inaceitável do glaze do CIVMR e insignificante alteragao da rugosidade.

RESUMO

OBJECTIVE: To evaluate and compare the friction of different ligature modes used in orthodontics, and to propose a new ligature model for conventional brackets ("H low-friction orthodontic ligature). MATERIALS AND METHODS: Samples were randomly divided into seven experimental groups: (1) resin H ligature (H3D), designed by the authors of this study and produced in a 3D printer, with conventional bracket; (2) metal H ligature (HFM), with conventional bracket; (3) passive self-ligating bracket (SLP); (4) "8" low-friction unconventional elastic (LT8), with conventional bracket; (5) loose conventional metal ligature (MLS), with conventional bracket; (6) conventional metal ligature fully tightened (MLT), with conventional bracket; (7) conventional elastic ligature (CEL), with conventional bracket-control. All samples were subjected to mechanical static friction testing using the EMIC DL 2000 universal testing machine. STATISTICAL ANALYSIS: To assess the normality requirement, the Shapiro-Wilk test was used, which showed a non-normal distribution for the means of the groups (p < 0.05). Therefore, statistical tests were performed to assess the existence of statistically significant differences between the groups through the Kruskal-Wallis, followed by Dunn's test, pairwise comparison, p < 0.05. RESULTS: The results obtained showed lower friction values for HFM (0.002 kgf), SLP (0.003 kgf), and LT8 (0.004 kgf)-these did not differ statistically from each other. These were followed by H3D (0.020 kgf), MLS (0.049 kgf), CEL (0.12 kgf), and, finally, MLT (0.21 kgf). CONCLUSION: The lowest friction value was found for the metal H ligature, similar to the self-ligating bracket and the "8" low-friction unconventional elastic. The resin H ligature presented intermediate friction values and the highest friction force was found for the MLT group.

RESUMO

Resumo Este trabalho é uma descrição de um caso clínico de paciente portador de Síndrome de Treacher Collins (STC). O paciente em questão é menor de idade e foi submetido a tratamento ortodôntico interceptivo de má oclusão de classe II, característica da síndrome devido à retrognatia, no Centro de Atenção e Pesquisa em Anomalia Craniofacial (CEAPAC), Cascavel ­ PR. As disostoses faciais são um conjunto de anomalias raras do esqueleto craniofacial, a mais comumente descrita é a STC, que é uma doença rara, sem predisposição por sexo ou raça. Os sintomas e a severidade desta síndrome diferem de indivíduo para indivíduo, mesmo entre membros da mesma família. Suas características comuns são as anormalidades dos pavilhões auriculares, hipoplasia dos ossos da face, obliquidade antimongolóide das fendas palpebrais com coloboma palpebral inferior e fissura palatina e o principal problema anatômico é a hipoplasia do terço médio da face e o hipodesenvolvimento da mandíbula e mento, o que leva o paciente portador desta síndrome apresentar por suas características faciais uma má oclusão de classe II muitas vezes associadas à mordida aberta, além de outros problemas orais como, por exemplo, as patologia das glândulas salivares, respiração bucal e apinhamento dentário. O tratamento ortodôntico intercepetivo do menor, embora após terminado tenha permanecido com má oclusão de classe II, obteve mudanças em parâmetros cefalométricos e faciais do paciente.(AU)

Abstract This work is a description of a clinical case of a patient with Treacher Collins Syndrome (CTS). The patient in question is younger and underwent interceptive orthodontic treatment of class II malocclusion, characteristic of the syndrome due to retrognathia, at the Center for Attention and Research in Craniofacial Anomaly (CEAPAC), Cascavel ­ PR. Facial dysostosis is a set of rare anomalies of the craniofacial skeleton, the most commonly described being CTS, it is a rare disease, without predisposition by sex or race. The symptoms and severity of this syndrome differ from individual to individual, even among members of the same family. Its common features are auricular pavilion abnormalities, facial bone hypoplasia, antimongoloid obliquity of the palpebral fissures with lower palpebral coloboma and cleft palate, and the main anatomical problem is hypoplasia of the middle third of the face and hypodevelopment of the mandible and chin, which Due to their facial characteristics, patients with this syndrome have a Class II malocclusion, often associated with an open bite, in addition to other oral problems such as salivary gland pathology, mouth breathing and dental crowding. The minor's interceptive orthodontic treatment, although after it ended, he remained with class II malocclusion, resulted in changes in the patient's cephalometric and facial parameters.(AU)

Assuntos

RESUMO

This study evaluated the effect of auricular acupuncture (AA) on physical (PA) and emotional (EA) aspects of patients with temporomandibular disorders (TMDs) and compared the effect of AA with those of Sham and occlusal splints (OS). In accordance with the CONSORT guidelines, patients with TMDs were evaluated by axes I and II of the RDC-TMD. The patients were allocated among three groups: OS, Sham and AA; and followed for 8 weeks. Both intragroup and intergroup evaluation for quantitative variables were analyzed with ANOVA, one-way, followed by the Tukey test. Qualitative variables were analyzed with the Kruskal-Wallis, and Dunn tests (intergroup evaluation) and for intragroup analyses, the Friedman and Wilcoxon tests were applied. At the end of the experiment, the chi-squared test was applied to compare the three groups with respect to the number of variables that had shown improved scores. The adopted level of significance for all tests was α = 5%. Intragroup analysis showed that, in the Sham group, no improvement in performance was seen in either EA and significant was improvements in 5 variables for 9 for PA, while in the AA group, significant improvements were observed in 2 variables for EA and in 9 for PA. In the OS group at the end of this study, significant improvements were observed in 8 and 8 variables for EA and PA, respectively. The analysis of therapies used revealed that the number of variables exhibiting significantly improved outcomes after treatment was similar between the AA and OS groups, whereas the sham group showed statistically significant differences when compared with the other two groups. In conclusion, this study demonstrated that AA applied at a specific TMJ ear point was able to bring about improvements in patients with TMDs, with outcomes similar to those in patients treated with an OS. CLINICAL TRIAL REGISTRATION: RBR-69ynnw (Brazilian Registry of Clinical Trials).

Assuntos

RESUMO

Polymeric aesthetic aligners were introduced in orthodontics as an innovative alternative to fixed appliances, however, their compositions and the thermal molding process may influence the biomechanical characteristics of these aligners. In this study four different clear aligner brands were used, ACE 035 Essix, C + Essix, Crystal 0.75 and Crystal 1.0, whose aim was to identify the thermal-processing influence on the mechanical and physicochemical properties of these materials, and to suggest a orthodontic sequence of wear for these appliances to achieve more effective treatment results. For the tensile tests the sample size calculation was based on probability distributions from the F test. The effect size used was 0.3, type 1 error of 0.05. Statistical Yield strength and Young's Modulus results were evaluated using the Shapiro-Wilk test. The groups were compared using the parametric test of analysis of variance, with Tukey post-test. Differences were statistically considered at the p < 0.05. The Infrared spectroscopy analysis showed no changes in the samples' chemical structure after thermal-processing. However, in the polypropylene aligner, differences were verified in the region attributed to the crystalline phase. Differential Scanning Calorimetry analysis for the same sample showed a crystallinity fraction decrease due to relaxation between polymer chains after molding. In the tensile tests evaluated, the tensile strength and 'Young's modulus presented higher values for aligners containing 100% polyethylene terephthalate glycol. Performing an analogy exercise of the properties of orthodontic wires used in conventional fixed appliances and, relating them to orthodontic plastics, aligners composed of different materials and/or thicknesses could be used in increasing sequence in terms of the modulus of elasticity, starting with C+, which has a lower elastic modulus value, using the ACE 035 as an intermediate and finishing with the Crystal 0.75 and 1.0, providing the desired stiffness to the aligners for the final phase.

Assuntos

RESUMO

Resumo Inúmeras variáveis são consideradas em uma oclusão normal, uma delas é a homeostasia da musculatura facial e sua harmonia com os ossos e dentes. Diversos fatores podem levar a alterações na funcionalidade muscular. Um exemplo é a queimadura facial, na qual é comum a formação de cicatrizes hipertróficas que provocam disfunção nas estruturas musculares e impactam no crescimento facial e no desenvolvimento da dentição. Paciente K.R.S, sexo feminino, 15 anos, procurou tratamento no Centro de Atenção e Pesquisa de Anomalias Craniofaciais (CEAPAC) com queixa de "dentes tortos". Durante anamnese relatou que quando criança sofreu um acidente doméstico que acarretou queimaduras na face e parte do corpo. A paciente era portadora de má oclusão de Classe I de Angle e lingualização dos incisivos superiores e inferiores. Observou-se atresia das arcadas dentárias e apinhamento moderado. Realizou-se a expansão rápida da maxila e expansão dentária inferior com a placa lábio ativa, seguida de alinhamento e nivelamento dos dentes com aparelho fixo. Na fase de contenção utilizaram-se placas de Hawley (superior e inferior), além de uma contenção fixa inferior. Os tratamentos de expansão das arcadas e alinhamento se mostraram viáveis e previsíveis. Entretanto a estabilidade tem prognóstico duvidoso, o que levou os autores a indicarem o uso das contenções por tempo indeterminado.(AU)

Abstract Numerous variables are considered in a normal occlusion, one of those is the homeostasis of the facial musculature and its harmony with bones and teeth. Several factors can lead to change in muscle functionality. An example is the facial burn injury in which it is common formation of hypertrophic scars that cause muscle structures dysfunction and impact on facial growth and dentition development. Patient K.R.S, 15-years-old, female, sought treatment at the Center for Attention and Research of Craniofacial Anomalies (CEAPAC) complaining of "crooked teeth". She reported during anamnesis that when she was a child, she suffered a domestic accident which caused facial, and body burn injury. The patient had Angle Class I malocclusion and upper and lower incisor lingualization. Dental arch atresia and moderate crowding were observed. Rapid maxillary expansion and lower dental expansion were performed with the lip bumper, followed by teeth alignment and leveling with a fixed appliance. In the retainment phase, Hawley plates (upper and lower) were used in addition to a fixed lower retainer. The treatment of arch expansion and alignment proved to be viable and predictable, however, the stability has a dubious prognosis, which led the authors to indicate the use of retainers indefinitely. (AU)

Assuntos

RESUMO

Vitamin D (VD) is important for the development and maintenance of bone tissue. This study used clinical and radiographic evaluations to analyze whether insufficient VD levels affect the periimplant health of patients with implant-supported prostheses. Data were collected for 33 patients with implant-supported prostheses: probing depth (PD); width of keratinized mucosa (wKM); bleeding index (mBI); periimplant plaque index (mPI); distance from implant to bone crest and VD level using chemiluminescence. After 1 year of implant-supported prosthesis installation, patients with levels under 30 ng/ml at baseline received 50000 IU of VD per week for 8 weeks (post treatment, PT), when clinical and radiographic evaluations were repeated for the control (n=19) and the VD (n=14) groups. Clinical and radiographic results were compared at baseline and at PT. There were differences in PD (p=0.0247) and distance from implant to bone crest (p<0.0001), but there were not statistically different after supplementation. wMK, mBI and mPI were not statistically different between groups. VD levels were 24.95 ± 0.96 ng/mL in the VD group (42.42% of patients), whereas 57.57% of all participants had a mean VD value of 40.99 ± 1.23 ng/mL, a statistically significant difference (p = 0.0034). According to clinical and radiographic findings, VD serum levels do not seem to affect periimplant health. (AU)

A vitamina D (VD) é importante para o desenvolvimento e a manutenção do tecido ósseo. Este estudo clínico e radiográfico avaliou a reposição dos níveis de vitamina D na saúde periimplantar de pacientes com próteses implantossuportadas. Profundidade bolsa a sondagem (PS), largura da mucosa queratinizada (LMQ), sangramento a sondagem (mBI), presença de placa bacteriana (mPI), distância entre implante e cristas ósseas e dosagem de VD utilizando o teste de quimioluminescência, foram medidos em 33 pacientes. Pacientes com dosagens acima de 30 ng/ml foram classificados como suficientes de VD (grupo controle, n = 19). Pacientes com menos de 30ng/ml (grupo VD, n = 14) receberam, após 1 ano da instalação da prótese sobre implante, reposição de 50.000 UI por semana durante 8 semanas, quando os exames foram repetidos. Dados iniciais intragrupos, bem como dados iniciais e pós-tratamento (PT) intergrupos e intragrupos, foram comparados. Diferenças estatísticas foram encontradas em PS (p=0.0247) e distância entre crista óssea e implante (p<0.0001) entre os grupos, mas não após reposição. Não houve diferença em LMQ, mBI e mPI entre os grupos. O valor médio de VD do grupo VD foi 24,95±0.96 ng/ml para 42,42% dos pacientes, enquanto 57,57% da amostra apresentaram valor médio de 40,99±1.23 ng/ml, demonstrando diferença estatística (p=0.0034). A reposição de VD não parece influenciar os achados clínicos e radiográficos da saúde periimplantar. (AU)

RESUMO

OBJECTIVE: This study evaluates the bond strength of two compositions of aesthetic translucent zirconia (TZ). MATERIALS AND METHODS: For this evaluation, test specimens were prepared from ICE Zirkon TZ and Prettau Anterior zirconia (PAZ) that were stored in distilled water at 37°C for two time periods: T1 (24 h) and T2 (90 days) to simulate aging. Two factors were evaluated for the samples-ceramic and aging time. The samples were subjected to tests of microshear strength and fracture type and were evaluated using scanning electron microscopy. RESULTS: The results were analyzed using the D'Agostino test, analysis of variance, and Tukey's test (p < 0.01). Statistically significant differences were observed for ceramic type and aging time. CONCLUSION: The results showed that PAZ provides significantly superior performance to TZ at the two aging times evaluated.

RESUMO

ABSTRACT Objective: This study aimed to assess the bond strength and marginal microleakage in composite resin restorations, using the Single Bond Universal adhesive system associated with Ultralux (halogen) and Bluephase (LED) light curing units. Methods: For bond strength, 80 healthy human third molars were divided into halogen light (n=40) and LED (n=40), and subdivided according to the following application techniques for the adhesive system: etch-and-rinse (enamel), self-etching (enamel), etch-and-rinse (dentin), and self-etching (dentin). The teeth were subjected to the microtensile test and the fracture pattern was observed under an optical microscope at 40X magnification; they were analyzed by ANOVA, and Fisher and Tukey's tests (5%). For the marginal microleakage test, 120 class II cavities were prepared in 60 healthy human third molars that were randomly divided into halogen light (n=30) and LED (n=30), and subdivided according to the following application techniques for the adhesive system: etch-and-rinse, selective etching, and self-etching. The teeth were thermocycled 2000 times (±5/55°C), stained in 5% basic fuchsin and sectioned for qualitative and quantitative assessments; they were analyzed by Kruskall-Wallis and Dunn tests (5%). Results: For the bond strength of enamel and dentin, the adhesive application with prior acid etching was better than self-etching (p<0.0001), regardless of the type of light curing unit (p<0.05). Etch-and-rinse showed the lowest microleakage values (p<0.0001). Conclusion: Etch-and-rinse obtained the best results relative to the other application techniques for the adhesive system in both tests, regardless of the type of light curing unit.

RESUMO Objetivo: Avaliar a resistência de união e microinfiltração marginal em restaurações de resina composta, utilizando sistema adesivo Single Bond Universal associado com fotoativadores Ultralux (halógeno) e Bluephase (LED). Métodos: Para resistência de união, oitenta terceiros molares humanos hígidos foram divididos: Halógena (n=40); LED (n=40), sendo subdivididos de acordo com a técnica de aplicação do sistema adesivo: condicionamento total-esmalte; autocondicionante-esmalte; condicionamento total-dentina; autocondicionante-dentina. Os dentes foram submetidos ao teste de microtração e o padrão de fratura foi observado em microscópio ótico - 40X de aumento, analisadas pelos testes ANOVA, Tukey e Fisher (5%). Para o ensaio de microinfiltração marginal, 120 cavidades classe II foram preparadas em sessenta terceiros molares humanos hígidos, aleatoriamente divididos: Halógena (n=30); LED (n=30) e subdivididos de acordo com a técnica de aplicação do sistema adesivo: condicionamento total; condicionamento seletivo; autocondicionante. Os dentes foram termociclados 2000 vezes (±5/55ºC), corados em fucsina básica 5% e seccionados para avaliações qualitativa e quantitativa, analisados pelos testes Kruskall-Wallis e Dunn (5%). Resultados: Para resistência de união em esmalte e dentina, a aplicação do adesivo com condicionamento ácido prévio, foi melhor que o autocondicionante (p<0.0001), independentemente do tipo de fotoativador utilizado (p<0.05). O condicionamento total mostrou os menores valores de microinfiltração, (p<0.0001). Conclusão: O condicionamento total, obteve os melhores resultados em relação às outras técnicas de aplicação do sistema adesivo em ambos os testes, independentemente do tipo de aparelho fotoativador.