ArticleDental materials : official publication of the Academy of Dental Materials2025
Is high-power laser irradiation a time efficient method to debond zirconia restorations?
Article in Dental materials : official publication of the Academy of Dental Materials, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
1 citing paper in PubMed.
- Er YAG laser debonding of zirconia restorations from titanium abutments depends on cement type water content and thickness.Scientific reports · 2026Article
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
objectiveWe aimed to assess the time efficiency of an Er,Cr:YSGG laser at 7.5 W for removing adhesively bonded zirconia structures, evaluating (1) temperature safety (<44 °C), (2) cytotoxicity, (3) phase transformation, and (4) debonding.
methodsZirconia-resin cement-resin composite specimens were subjected to laser irradiation and monitored using an infrared camera. Cytotoxicity was evaluated by laser irradiating murine cells, with cell viability and proliferation assessed at 24 h and 7 days post-irradiation. Changes in zirconia surface roughness and morphology were analyzed and the localized tetragonal to monoclinic phase transformation (t → m) in the laser-irradiated zirconia was investigated using SEM/EBSD. The shear bond strength of laser irradiated 2 and 3 mm thick resin-bonded zirconia slices was tested. Additionally, a pull-off test was conducted on resin-bonded zirconia crowns to evaluate the laser's efficiency in removing clinically relevant specimens.
resultsMean temperatures across the specimens' layers were between 27.2 and 28.8 °C. Cell proliferation significantly increased following laser irradiation at both time points; however, a marked decrease in cell viability was observed after 7 days. While irradiation did not alter surface roughness, microcracks formed on the zirconia surface and triggered t → m phase transformation in these regions. Shear bond strength was significantly reduced in both the 2 and 3 mm irradiated zirconia groups, with most samples showing spontaneous debonding during irradiation. No significant difference in pull-off force was found between the non-irradiated and irradiated zirconia crowns. SIGNIFICANCE: Laser irradiation at 7.5 W for 120 s is not a time efficient method to remove zirconia crowns.
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