Journal article
Polywave And Monowave Light-Curing Units Effects On Polymerization Efficiency Of Different Photoinitiators
Brazilian dental science, Vol.24(4), pp.1-9
10/01/2021
DOI: 10.14295/bds.2021.v24i4.2661
Abstract
Objective: of this study was to characterize and correlate the absorption spectra of three photoinitiators [camphorquinone (CQ), diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO) and phenylbis (2,4,6-trimethylbenzoyl)-phosphine oxide (BAPO)], using second or third-generation light curing units (LCU), and to evaluate the degree of conversion and the physical properties of an experimental resin adhesive. Material and methods: Second-generation (Radii-cal® and Emitter D®) and third-generation (Valo® Cordless and Bluephase N®) LCU were assessed regarding spectrum and irradiance rate of emitted light. Also, the photoinitiators (CQ, TPO and BAPO) were characterized by a light absorption spectrum assessed by UV-Vis spectroscopy, degree of conversion and yellowing effect. Statistical analyzes considered two-way ANOVA and post-hoc Tukey test. Results: BAPO presented higher reactivity compared to TPO. Regarding degree of conversion of the photoinitiators activated by different light-curing units, the Emitter D® device promoted a high degree of conversion. BAPO presented the highest yellowing effect values. Conclusions: The emission and absorption characteristics of the photoinitiators were different. The polymerization reaction activated by the second-generation light-curing unit was reduced when using an experimental resin with photoinitiator TPO, and the third-generation light-curing unit showed a higher polymerization potential regardless of the photoinitiator.
Keywords
Light-curing of dental adhesives; Photoinitiators dental; Curing lights dental.
Details
- Title: Subtitle
- Polywave And Monowave Light-Curing Units Effects On Polymerization Efficiency Of Different Photoinitiators
- Creators
- Peterson Oliveira BoeiraMateus de Azevedo Kinalski - Universidade Federal de PelotasMateus Bertolini Fernandes Dos SantosRafael Ratto de MoraesGiana da Silveira Lima
- Resource Type
- Journal article
- Publication Details
- Brazilian dental science, Vol.24(4), pp.1-9
- DOI
- 10.14295/bds.2021.v24i4.2661
- ISSN
- 2178-6011
- eISSN
- 2178-6011
- Language
- English
- Date published
- 10/01/2021
- Academic Unit
- Prosthodontics
- Record Identifier
- 9984945917602771
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