Influence of beam homogenization on bond strength of adhesives to dentin
| Autor: | Jorge Soto-Montero, Marcelo Giannini, Carlos Tadeu dos Santos Dias, Richard B. Price, Gabriel Nima |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Molar
Materials science Dental Cements 02 engineering and technology Dental bonding Composite Resins 03 medical and health sciences 0302 clinical medicine Adhesives Tensile Strength Materials Testing Dentin medicine Homogenizer Light beam General Materials Science Thermal emittance Composite material General Dentistry Bond strength Dental Bonding 030206 dentistry 021001 nanoscience & nanotechnology Resin Cements medicine.anatomical_structure Mechanics of Materials Dentin-Bonding Agents RESISTÊNCIA DE UNIÃO (ODONTOLOGIA) Adhesive 0210 nano-technology |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0109-5641 |
| DOI: | 10.1016/j.dental.2020.10.003 |
| Popis: | Objective This study evaluated the effect of beam homogeneity on the microtensile bond strength (μTBS) of two adhesive resins to dentin. Methods One polywave light-emitting-diode (LED) LCU (Bluephase Style, Ivoclar Vivadent AG) was used with two different light guides: a regular tip (RT, 1010 mW/cm2 emittance) and a homogenizer tip (HT, 946 mW/cm2 emittance). The emission spectra and beam profiles were measured from both light guides. Extracted third molars were prepared for μTBS evaluation using two adhesive systems: Excite F (EXF) and Adhese Universal (ADU). Bond strength was calculated for each specimen (n = 10) at locations that correlated with the output of the two LED chips emitting blue (455 nm) and the one chip that emitted violet light (409 nm) after 24-hs and after one-year water-storage. The μTBS was analyzed using a four-way analysis of variance (factors: adhesive system, light guide, LED wavelength, and storage time) and post-hoc Tukey test (α = 0.05). Results EXF always delivered a higher μTBS than ADU (p 0.05). Significance Homogeneity of the emitted light beam was associated with higher 24-h μTBS to dentin, regardless of the adhesive tested. Also, differences in the composition of adhesives can affect their compatibility with restorative composites and their ability to maintain bonding over one year. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect