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, Margareth; Oliveira, Denise Cerqueira; Liberti, Édson Aparecido

doi:10.1590/s1517-74912001000400003

Cited by 25 publications

(6 citation statements)

References 19 publications

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“…So, the dentin characteristics after the Er:YAG laser irradiation are not compatible with the nowadays adhesive materials. The collagen thermal denaturation caused by the Er:YAG laser irradiation [15,21,22,25,33,34,48,51] does not allow or hinders the hybrid layer formation [9,[42][43][44], which is the main responsible for the adhesion.…”

Section: Discussionmentioning

confidence: 99%

Bond strength of an adhesive system irradiated with Nd:YAG laser in dentin treated with Er:YAG laser

Malta

Costa²,

Pelino³

et al. 2007

Laser Phys. Lett.

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Abstract:The purpose of this in vitro study was to verify through micro tensile bond test the bond strength of an adhesive system irradiated with Nd:YAG laser in dentine previously treated with Er:YAG laser. Twenty caries free extracted human third molars were used. The teeth were divided in four experimental groups (n = 5): (G1) control group; (G2) irradiation of the adhesive system with the Nd:YAG laser; (G3) dentin treatment with Er:YAG laser; (G4) dentin treatment with Er:YAG laser followed by the irradiation of the adhesive system with Nd:YAG laser. The Er:YAG laser fluency parameter for the dentin treatment was of 60 J/cm 2 . The adhesive system was irradiated with the Nd:YAG laser with fluency of 100 J/cm 2 . Dental restorations were performed with Adper Single Bond 2/Z250. One tooth from each group was prepared for the evaluation of the adhesive interface under SEM and bond failure tests were also performed and evaluated. The statistical analysis showed statistical significant difference between the groups G1 and G3, G1 and G4, G2 and G3, and G2 and G4; and similarity between the groups G1 and G2, and G3 and G4. The adhesive failures were predominant in all the experimental groups. The SEM analysis showed an adhesive interface with features confirming the results of the mechanical tests. The Nd:YAG laser on the adhesive system did not influence the bond strength in dentin treated or not with the Er:YAG laser. Groups

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Section: Discussionmentioning

confidence: 99%

Bond strength of an adhesive system irradiated with Nd:YAG laser in dentin treated with Er:YAG laser

Malta

Costa²,

Pelino³

et al. 2007

Laser Phys. Lett.

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“…Its use prior to adhesive system application modifies the dentin and makes it impermeable, through melting and recrystallization. This process fully or partially obliterates the dentinal tubules [9][10][11], making the dentin become more resistant to acid etching [12][13][14], hindering infiltration of the adhesive system, and possibly forming a less thick hybrid layer, with shorter and fewer resin extensions [12,15,16].…”

Section: Introductionmentioning

confidence: 99%

Dentin bond strength of an adhesive system irradiated with an Nd:YAG laser

Ruschel

Malta²,

Monteiro

2016

Laser Phys.

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The objective of this study was to evaluate the microtensile bond strength of an adhesive system applied to dentin, followed by Nd:YAG laser irradiation. Twenty-two recently extracted third molars were divided into four groups (n = 5). In the G1 and G2 groups, the adhesive system was applied conventionally, and in groups G3 and G4, the adhesive system was irradiated with an Nd:YAG laser (100 J cm −2 ). The specimens were stored in distilled water at 37 °C, those in groups G1 and G3 for 24 h, and those in groups G2 and G4 for 3 months. Two teeth from groups G1 and G3 were used for observation of the hybrid layer, using a confocal microscope (n = 1). The teeth were submitted to a microtensile bond strength test. Analysis of the type of fracture was performed using a stereoscope (40×). The results for microtensile bond strength (MPa) and standard deviation (±SD) were: G1-31.68 (5.14); G2-37.88 (±5.04); G3-35.32 (±8.79); G4-31.53 (±9.01). There were no significant differences among the groups (p > 0.05). Adhesive failure was predominant in all the groups. The Nd:YAG laser irradiation of the adhesives did not influence dentin bond strength during the periods of 24 h or 3 months of storage in distilled water.

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“…These are considered simple, low costing and efficient approaches as the first line of treatment for the majority of patients. Moreover, the use of different types of lasers in the treatment of dentin hypersensitivity has been reported, with wide variation in their effectiveness, depending on the used type of laser and parameters [11][12][13] . Invasive procedures may include gingival surgery, adhesive restoration or pulpectomy 11 .…”

Section: Introductionmentioning

confidence: 99%

Effect of a desensitizing dentifrice on the bond strength of different adhesive systems

Cavalcanti¹,

Souza²,

Lopes³

et al. 2013

Braz. J. Oral Sci.

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Aim: This in vitro study evaluated the effect of using a dental hypersensitivity treatment on the bond strength to dentin of etch-and-rinse and self-etching simplified adhesive systems. Methods: 40 healthy molars were used. The crowns of teeth were removed at the dentinoenamel junction, and remaining roots were sectioned in the mesiodistal direction along their long axis, separating the buccal and lingual/palatal halves. The segments obtained were ground, keeping the buccal or lingual/palatal face turned downwards in order to flatten the surface and produce a standardized smear layer. Prepared specimens were randomly distributed into 4 groups (n=10), according to the combination of surface treatment with the desensitizing dentifrice Colgate Sensitive Pro-Relief (Colgate Palmolive ®) (test group-with dentifrice and control group-without dentifrice) and type of simplified bonding agent (etch-and-rinse and self-etching agents). Resin composite blocks were fabricated on the dentin surfaces, after application of bonding agents, and specimens were sectioned into rectangular stick-shaped specimens with cross-sectional area of approximately 0.8mm 2. For microtensile bond strength tests, 4 sticks were randomly selected from the central region of specimens, and fixed to a universal test machine. Data were analyzed statistically by the Mann-Whitney U test (a=0.05). Results: The bond strength obtained in the group without desensitizer (control) + etch-and-rinse agent was significantly higher compared with the other groups. Under both experimental conditions, the self-etching agent showed weak bond strength to dentin. Conclusions: Change in the dentin substrate by obliteration of tubules in the process of relieving dentinal sensitivity could reduce the bond strength of simplified etch-and-rinse and self-etching bonding agents.

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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

Cited by 25 publications

References 19 publications

Bond strength of an adhesive system irradiated with Nd:YAG laser in dentin treated with Er:YAG laser

Bond strength of an adhesive system irradiated with Nd:YAG laser in dentin treated with Er:YAG laser

Dentin bond strength of an adhesive system irradiated with an Nd:YAG laser

Effect of a desensitizing dentifrice on the bond strength of different adhesive systems

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