Internal photo-activation of a dental composite using optical fibers: a holographic, thermographic and Raman study

Novta, Evgenije; Lainović, Tijana; Grujić, Dušan; Savić-Šević, Svetlana; Tóth, Elvira; Cvejić, Željka; Blažić, Larisa

doi:10.1007/s11082-022-04233-2

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…The increase in intrapulpal temperature during light-curing can be caused by factors related to the light source (intensity, wavelength, and exposure time), the restorative material (density, thermal conductivity and capacity, and increment thickness), and the tooth (thickness of remanent dentin, dentin shade, and type of dental element) [ 33 , 34 ]. Heat released by the exothermic reaction of the restorative material and exposure to light-curing unit [ 35 ] can also contribute to pulp damage. This is particularly concerning as the pulp is a highly vascularized tissue with the ability to dissipate heat to the dentin–pulp complex [ 14 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Rapid High-Intensity Light-Curing on Increasing Transdentinal Temperature and Cell Viability: An In Vitro Study

Miranda,

Lins,

Santi

et al. 2024

Polymers

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Background: This study investigated effects of rapid high-intensity light-curing (3 s) on increasing transdentinal temperature and cell viability. Methods: A total of 40 dentin discs (0.5 mm) obtained from human molars were prepared, included in artificial pulp chambers (4.5 × 5 mm), and subjected to four light-curing protocols (n = 5), with a Valo Grand light curing unit: (i) 10 s protocol with a moderate intensity of 1000 mW/cm2 (Valo-10 s); (ii) 3 s protocol with a high intensity of 3200 mW/cm2 (Valo-3 s); (iii) adhesive system + Filtek Bulk-Fill Flow bulk-fill composite resin in 10 s (FBF-10 s); (iv) adhesive system + Tetric PowerFlow bulk-fill composite resin in 3 s (TPF-3 s). Transdentinal temperature changes were recorded with a type K thermocouple. Cell viability was assessed using the MTT assay. Data were analyzed using one-way ANOVA and Tukey tests for comparison between experimental groups (p < 0.05). Results: The 3 s high-intensity light-curing protocol generated a higher temperature than the 10 s moderate-intensity standard (p < 0.001). The Valo-10 s and Valo-3 s groups demonstrated greater cell viability than the FBF-10s and TPF-3 s groups and statistical differences were observed between the Valo-3 s and FBF-10 s groups (p = 0.023) and Valo-3 s and TPF-3 s (p = 0.025), with a potential cytotoxic effect for the FBF-10 s and TPF-3 s groups. Conclusions: The 3 s rapid high-intensity light-curing protocol of bulk-fill composite resins caused a temperature increase greater than 10 s and showed cell viability similar to and comparable to the standard protocol.

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