Publication: Transmissão de luz emitida por fotopolimerizador multi-picos através de braquetes cerâmicos mono e policristalinos
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CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::ORTODONTIA
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Summary
Objective: To evaluate light transmission through monocrystalline and
polycrystalline ceramic brackets using a multi-peak light-curing unit
(LCU). Materials and Methods: In vitro study with seventeen ceramic brackets:
five monocrystalline (IceramS, InspireIce, Luminous, Radiance, Safira) and
twelve polycrystalline (CeramicSLI, ClarityAdvancedCeramic, DamonClear,
Iceclear, Iceram, Iceram, In-OvationC, In-Vu, Inflexion, OvationC, PolySafira, and
Translux). LCU power and emission spectrum in normal and ortho modes were
measured at zero mm from the integrating sphere aperture and transmitted
through each bracket using an integrating sphere connected to a spectrometer.
Irradiance and transmitted energy were calculated. Beam profiles were obtained
via laser beam profiler. Data were analyzed by two-way ANOVA and Tukey's test
(α = 0.05). Results: All brackets significantly reduced radiant power, irradiance,
and energy compared to the light emitted by the LCU (P < 0.001). PolySafira and
IceramP showed higher light transmission, while CeramicSLI and In-Vu showed
the lowest values. Light transmission was not influenced by the crystalline
structure. The ortho mode increased radiant power and irradiance but reduced
total energy compared to the standard mode (P < 0.001). Conclusion: Light
transmission depends on bracket design and optical properties, rather than
crystalline structure. The activation mode modifies light emission; the ortho mode
increases irradiance but reduces total energy, which is lower than required for
light-activation of orthodontic resins, a factor that should be considered when
selecting polymerization protocols.
Keywords: Orthodontic Brackets; Ceramics; Curing Lights Dental;
Photopolymerization.
Abstract
Objective: To evaluate light transmission through monocrystalline and
polycrystalline ceramic brackets using a multi-peak light-curing unit
(LCU). Materials and Methods: In vitro study with seventeen ceramic brackets:
five monocrystalline (IceramS, InspireIce, Luminous, Radiance, Safira) and
twelve polycrystalline (CeramicSLI, ClarityAdvancedCeramic, DamonClear,
Iceclear, Iceram, Iceram, In-OvationC, In-Vu, Inflexion, OvationC, PolySafira, and
Translux). LCU power and emission spectrum in normal and ortho modes were
measured at zero mm from the integrating sphere aperture and transmitted
through each bracket using an integrating sphere connected to a spectrometer.
Irradiance and transmitted energy were calculated. Beam profiles were obtained
via laser beam profiler. Data were analyzed by two-way ANOVA and Tukey's test
(α = 0.05). Results: All brackets significantly reduced radiant power, irradiance,
and energy compared to the light emitted by the LCU (P < 0.001). PolySafira and
IceramP showed higher light transmission, while CeramicSLI and In-Vu showed
the lowest values. Light transmission was not influenced by the crystalline
structure. The ortho mode increased radiant power and irradiance but reduced
total energy compared to the standard mode (P < 0.001). Conclusion: Light
transmission depends on bracket design and optical properties, rather than
crystalline structure. The activation mode modifies light emission; the ortho mode
increases irradiance but reduces total energy, which is lower than required for
light-activation of orthodontic resins, a factor that should be considered when
selecting polymerization protocols.
Keywords: Orthodontic Brackets; Ceramics; Curing Lights Dental;
Photopolymerization.
Keywords
Braquetes Ortodônticos, Orthodontic Brackets, Cerâmica, Ceramics, Luzes de Cura Odontológica, Curing Lights Dental, Fotopolimerização, Photopolymerization
Citation
GOBI, Sara Saramago. Transmissão de luz emitida por fotopolimerizador multi-picos através de braquetes cerâmicos mono e policristalinos. 2026. 39 f. Dissertação (Mestrado em Odontologia) - Universidade Federal de Uberlândia, Uberlândia, 2026. DOI http://doi.org/10.14393/ufu.di.2026.96.