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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Stability of the Light Output, Oral Cavity Tip Accessibility in Posterior Region and Emission Spectrum of Light-Curing Units

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Andre, C. B. [1] ; Nima, G. [2] ; Sebold, M. [1] ; Giannini, M. [3] ; Price, R. B. [4]
Total Authors: 5
[1] Univ Estadual Campinas, Piracicaba Dent Sch, Restorat Dent, Piracicaba - Brazil
[2] Univ Estadual Campinas, Piracicaba Dent Sch, Dent Mat, Piracicaba - Brazil
[3] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Restorat Dent, Piracicaba - Brazil
[4] Dalhousie Univ, Dent Clin Sci, Halifax, NS - Canada
Total Affiliations: 4
Document type: Journal article
Source: Operative Dentistry; v. 43, n. 4, p. 398-407, JUL-AUG 2018.
Web of Science Citations: 5

Objectives: This study evaluated the light output from six light-emitting diode dental curing lights after 25 consecutive light exposures without recharging the battery, tip accessibility in the posterior region, and light beam spread from light-curing units. Methods: Irradiance, spectral peak, and radiant exposure were measured with the battery fully charged (Bluephase Style, ESPE Cordless, Elipar S10, Demi Ultra, Valo Cordless, and Radii-Cal) and monitored for 25 light exposures (each lasting 10 seconds). The tip diameter was measured to identify the beam size and the ability of the six light-curing units to irradiate all areas of the lower second molar in the standard output setting. Results: Four curing lights delivered a single peak wavelength from 454 to 462 nm, and two (Bluephase Style and Valo Cordless) delivered multiple emission peaks (at 410 and 458 nm and 400, 450, and 460 nm, respectively). The irradiance and radiant exposure always decreased after 25 exposures by 2% to 8%, depending on the light unit; however, only ESPE Cordless, Valo Cordless, and Radii-Cal presented a statistical difference between the first and the last exposure. The tip diameter ranged from 6.77 mm to 9.40 mm. The Radii-Cal delivered the lowest radiant exposure and irradiance. This light was also unable to access all the teeth with the tip parallel to the occlusal surface of the tooth. Conclusion: Not all of the blue-emitting lights deliver the same emission spectra, and some curing lights delivered a lower irradiance (as much as 8% lower) after the 25th exposure. (AU)

FAPESP's process: 16/07211-5 - Determination of energy levels delivered by light-curing units used to light-activate resin-based dental restorative materials
Grantee:Marcelo Giannini
Support type: Research Grants - Visiting Researcher Grant - International