COMPARATIVE STUDY OF THE SHEAR BOND STRENGTH OF COMPOSITE RESIN TO DENTAL ENAMEL CONDITIONED WITH PHOSPHORIC ACID OR Nd: YAG LASER

Eduardo, Carlos; Oliveira, Wilson T.; Myaki, Sílvio Issáo; Zezéll, Denise Maria

doi:10.1590/s0103-06631997000400004

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…The use of laser after the application of an adhesive system seemed viable because of the results obtained by Gonçalves et al, 9 who suggested the technique, and Eduardo et al, 8 who corroborated their studies. Our results compared the efficiency of these methods, with the best results found in the groups treated with laser.…”

Section: Discussionmentioning

confidence: 98%

Marginal Leakage in Class V Cavities Pretreated with Different Laser Energy Densities

Ribeiro

Anido

Rauscher

et al. 2005

Photomedicine and Laser Surgery

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The purpose of the present study was to evaluate in vitro the degree of marginal leakage in Class V cavities involving the cementoenamel junction. Cavities were 4 mm wide and 2 mm deep. The specimens received dentin pretreatment (37% phosphoric acid) followed by the Single Bond (3M) adhesive system application. The 40 specimens were then divided into four groups: Group 1 (control); Group 2 (Nd:YAG laser at 120 mJ/pulse, frequency of 10 Hz, power of 1.2 W); Group 3 (Nd:YAG laser at 140 mJ/pulse, frequency of 10 Hz, power of 1.4 W); Group 4 (Nd:YAG laser at 160 mJ/pulse, frequency of 10 Hz, power of 1.6 W). The cavities were restored with Z100 composite resin (3M) and light cured at 300-600 mW/cm 2 light intensity. Specimens were thermocycled to 500 cycles from 2-50°C. After that, they were dried and sealed with nail varnish, respecting 1 mm around the restorations, and immersed in 0.5% methylene blue solution for 4 h. After this period, the teeth were rinsed, dried, sectioned, and analyzed in a stereoscopic loupe. The highest leakage scores were considered for each specimen. The results were statistically analyzed by the analysis of variance (ANOVA) -Kruskal-Wallis test to the 5% level. For both the enamel and cementum, there was a decrease in marginal leakage with the application of laser energy; no significant differences were observed for Groups 2, 3, and 4. The results also showed a smaller tendency to marginal leakage on the cementum than on the enamel.

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Section: Discussionmentioning

confidence: 98%

Marginal Leakage in Class V Cavities Pretreated with Different Laser Energy Densities

Ribeiro

Anido

Rauscher

et al. 2005

Photomedicine and Laser Surgery

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“…A utilização de opções alternativas, como os lasers Er:YAG e Nd:YAG, no tratamento da superfície de esmalte e dentina, para restaurações estéticas adesivas 4 , vem apresentando resultados diversificados. Este fato desperta a necessidade de estudos mais elaborados que nos auxilie na busca de melhores parâmetros para se conseguir esta perfeita união 3,4,6,7,8,13,16,17,18,24,25,26 . Também se torna evidente que os adesivos devem ser pesquisados para que haja uma maior interação entre a superfície irradiada e o adesivo aplicado.…”

Section: Discussionunclassified

“…Atualmente, um dos passos operatórios alternativos para o tratamento dentinário é o uso da irradiação com laser Er:YAG 4 , que vem sendo estudado não somente para a realização de preparo cavitário, remoção de tecido cariado como no condicionamento de esmalte e dentina. Outro tipo de laser que tam-bém vem sendo pesquisado é o Nd:YAG, principalmente seu efeito em esmalte e dentina 3,6,7,8,16,17,19,24,25 .…”

Section: Introductionunclassified

Avaliação morfológica da união entre adesivo/resina composta e dentina irradiada com laser Er:YAG e laser Nd:YAG: estudo comparativo por microscopia de varredura

Oda

Oliveira

Liberti

2001

Pesqui. Odontol. Bras.

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Since bonding systems were introduced in the restorative procedures carried out with esthetic materials, the treatment of dentin surfaces has been widely studied in order to establish the ideal technique. The application of 37% phosphoric acid on dentin is still the best known method. However, alternative methods for treating the dentin surface have been discussed in the literature, including the utilization of some kinds of laser irradiation. The purpose of this research was to morphologically evaluate the bond between adhesive materials and the dentin treated with Er:YAG and Nd:YAG lasers, in a comparative study by means of scanning electron microscopy (SEM). Irradiation either substituted acid etching, or was associated to it. Recently extracted bovine incisors were utilized. They received class V cavity preparations and were restored with a bonding system and a light-cured composite resin. Meanwhile, some of the teeth underwent irradiation with Er:YAG laser or Nd:YAG laser before the application of the bonding agent and the composite resin. The samples were selected, prepared for SEM and submitted to morphological analysis. Data were registered in photomicrographs. Based on the microscopic observations, we concluded that only in the dentin surfaces submitted to irradiation with Er:YAG laser and to acid conditioning there was penetration of resin into the dentine. With the Nd:YAG laser treatment, there was only visual superposition of resin over the dentin surface, which suggests that there was only occlusion of the tubules, with characteristics of fusion in the superficial dentine.

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Nd:YAG Laser Influence on Sound Dentin Bond Strength

Matos¹,

Oliveira²,

Kuramoto³

et al. 1999

Journal of Clinical Laser Medicine & Surgery

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COMPARATIVE STUDY OF THE SHEAR BOND STRENGTH OF COMPOSITE RESIN TO DENTAL ENAMEL CONDITIONED WITH PHOSPHORIC ACID OR Nd: YAG LASER

Cited by 4 publications

References 7 publications

Marginal Leakage in Class V Cavities Pretreated with Different Laser Energy Densities

Marginal Leakage in Class V Cavities Pretreated with Different Laser Energy Densities

Avaliação morfológica da união entre adesivo/resina composta e dentina irradiada com laser Er:YAG e laser Nd:YAG: estudo comparativo por microscopia de varredura

Nd:YAG Laser Influence on Sound Dentin Bond Strength

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