ArticleLasers in surgery and medicine2026
Bonding Strength of Universal Adhesives to Laser-Etched Deep and Superficial Dentin.
Article in Lasers in surgery and medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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2 authors.
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Abstract
objectiveThe effectiveness of laser-etching (LE) on dentin shear bond strength (SBS) of universal adhesives remains unclear. This study aimed to compare the SBS of a nanohybrid composite resin to superficial and deep dentin following application of a contemporary universal adhesive using either self-etch (SE) or LE. MATERIALS AND
methodsForty-four extracted human molars were embedded in acrylic blocks and prepared to obtain superficial or deep dentin surfaces (n = 22 each), and then assigned to four groups (n = 11). The Scotchbond Universal Adhesive (SBU) was applied in SE in Groups 1 and 3, while dentin surfaces were conditioned with an Er, Cr:YSGG laser (1.5 W, 20 Hz) before adhesive application in Groups 2 and 4. The nanohybrid composite (Filtek Z550-FZU) was placed and light-cured. SBS was determined with a universal testing machine, while fracture patterns were evaluated under a stereomicroscope, and the results were statistically assessed by either ANOVA or the Kruskal-Wallis test (p < 0.05).
resultsApplication of universal adhesive using SE and LE did not affect the shear bond strength of nanohybrid composite resin placed after application to superficial and deep dentin (p > 0.05). Evaluation of failure types revealed no difference in failure type distribution between SE and LE groups (p > 0.05).
conclusionDentin depth and etching technique had no effect on the SBS of composite resin. No difference was found between groups in terms of failure types.
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