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Lasers in Medical Science

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11-08-2022 | Laser | Original Article

Effect of nanosecond- and microsecond-pulse Er,Cr:YSGG laser ablation on dentin shear bond strength of universal adhesives

Authors: Zhengdong Xiong, Shanshan Tu, Lingling Jiang, Tingqing Cheng, Haihe Jiang

Published in: Lasers in Medical Science | Issue 8/2022

Abstract

Objective

The study aimed to evaluate the bond strength of universal adhesives to dentin after Er,Cr:YSGG laser irradiation with nanosecond-domain and microsecond-domain pulses.

Methods

Eighty extracted caries-free, sound human molars were divided into eight groups. The enamel was removed until the dentin occlusal flat dentin surface was exposed. Etch-and-rinse followed by adhesive was applied to group 1, and a self-etch adhesive was applied to group 2. Er,Cr:YSGG laser (3 mJ, 100 Hz, 100 ns), (3 mJ, 100 Hz, 150 μs), and (20 mJ, 100 Hz, 150 μs) were applied to groups 3–4, 5–6, and 7–8, respectively. The laser preparation was followed by self-etch adhesives or adhesives treatment. When the composite resin had been built up on the samples, the shear bond strength was tested, and the data were statistically analyzed using analysis of variance (ANOVA).

Results

Groups prepared with nanosecond-pulse laser showed significantly higher bond strength values than the microsecond-pulse laser groups and self-etch mode group, and the SEM photographs also showed more dentinal tubules and no damage in the ablation area. The shear bond strength of long pulse laser ablated was comparable to that of self-etching system when it was combined with a self-etch adhesive at low energy, but higher energy laser degraded shear bond strength.

Conclusions

The pulse width of Er,Cr:YSGG laser affects the bond strength, nanosecond pulses of laser irradiation without water cooling can enhance bond strength, but microsecond pulses of laser cannot enhance bond strength.

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Title: Effect of nanosecond- and microsecond-pulse Er,Cr:YSGG laser ablation on dentin shear bond strength of universal adhesives
Authors: Zhengdong Xiong
Shanshan Tu
Lingling Jiang
Tingqing Cheng
Haihe Jiang
Publication date: 11-08-2022
Publisher: Springer London
Keywords: Laser
Er,Cr:YSGG Laser
Published in: Lasers in Medical Science / Issue 8/2022
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-022-03625-w

At a glance: The STEP trials

Springer Medicine

Effect of nanosecond- and microsecond-pulse Er,Cr:YSGG laser ablation on dentin shear bond strength of universal adhesives

Abstract

Objective

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Objective

Methods

Results

Conclusions

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