Effect of various Er:YAG laser conditioning energies on dentin surface: micromorphological investigation and dentin-resin shear bond strength test.
Acid etching
Dentin-resin bond
Laser ablation
Scanning electron microscopy
Shear strength
Surface roughness
Journal
Lasers in medical science
ISSN: 1435-604X
Titre abrégé: Lasers Med Sci
Pays: England
ID NLM: 8611515
Informations de publication
Date de publication:
25 Oct 2023
25 Oct 2023
Historique:
received:
05
12
2022
accepted:
19
10
2023
medline:
26
10
2023
pubmed:
25
10
2023
entrez:
25
10
2023
Statut:
epublish
Résumé
The aim of this study is to assess the influence of various Er:YAG laser energies on dentin surface micromorphology and dentine-resin shear bond strength (SBS). Eighty dentin specimens were prepared and divided randomly into ten groups: control group (CG), phosphoric acid-etched group (AG), four laser-conditioned groups treated with various pulse energies of 40, 60, 80, and 100 mJ (L40, L60, L80, L100), and four laser-conditioned acid-etched groups (LA40, LA60, LA80, LA100). Two specimens from each group underwent scanning electron microscopy examination, while the remaining six were subjected to the dentin-resin SBS test. Statistical analyses included Welch's analysis of variance (ANOVA), followed by post hoc Tamhane's T2 multiple comparisons test, Pearson's correlation, and Fisher's exact test. Pulse energies of 60, 80, and 100 mJ fully exposed the dentin tubule orifices, although 100 mJ lead to microcracks. Laser-conditioned surfaces exhibited smaller tubule diameters compared to acid-etched surfaces, and tubule diameters positively correlated with dentin-resin SBS. Laser-conditioned groups showed lower SBS values, while laser-conditioned acid-etched groups demonstrated higher SBS values. No significant relationship was observed between dentin surface roughness and SBS. The range of laser energies used for dentin conditioning had limited effects on SBS or failure modes. Laser conditioning with energies ranging from 40 to 100 mJ effectively removes the smear layer from the dentin surface. However, to enhance dentin-resin bond strength, further acid etching of the laser-conditioned surface is necessary.
Identifiants
pubmed: 37878132
doi: 10.1007/s10103-023-03915-x
pii: 10.1007/s10103-023-03915-x
doi:
Types de publication
Journal Article
Randomized Controlled Trial
Langues
eng
Sous-ensembles de citation
IM
Pagination
242Subventions
Organisme : National Natural Science Foundation of China
ID : 62175135
Organisme : Fundamental Research Program of Shanxi Province
ID : 202203021221240
Organisme : Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University
ID : KF202105
Informations de copyright
© 2023. The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.
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