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http://hdl.handle.net/1843/45434| Type: | Artigo de Periódico |
| Title: | Effect of indirect restorative material and thickness on light transmission at different wavelengths |
| Authors: | Rafael Rocha Pacheco Adriana Oliveira Carvalho Carolina Bosso André Ana Paula Almeida Ayres Renata Bacelar Castanhede de Sá Tiago Monteiro Dias Frederick Rueggeberg Marcelo Giannini |
| Abstract: | Purpose: The aim of this study was to evaluate the influence of indirect restorative material type and thickness on the transmission of different wavelengths from a broad-banded dental curing light. Methods: Four dental indirect restorative materials for computer-aided design and computer-aided manufacturing (CAD/CAM) were evaluated: [RC] resin/ceramic hybrid material (Lava Ultimate), [FC] feldspathic ceramic (VitaBlocs), and two zirconia-based ceramics ([ZK] Katana; and [ZL] Lava). Total loss of irradiance (TL) was measured for blue (WB, 425-490nm) and violet (WV, 350-425nm) wavelengths. Specimens of 15×15mm with varying thicknesses (0.5, 1.0, 1.5, and 2.0mm) were fabricated (n=5). A plasma-arc dental light-curing unit was used (Arc Light-II). To assess TL as a function of wavelength, a software (Spectra Suite v5.1) connected to a spectroradiometer (USB2000) and an integrating sphere (CTSM-LSM-60-SF) was used. Data was subjected to statistical analysis (two-way ANOVA and post-hoc Tukey test, α=0.05). Results: A 0.5mm interposition resulted in TL from 50.5 to 67.2%, depending on material. Increased thickness resulted in higher TL for all materials. FC showed less TL compared to ZK. In general, WV showed higher TL than did WB, and WV/WB proportion decreased with increasing thickness. Conclusions: Indirect materials significantly reduced TL, and this effect is greater with increasing thickness. WV showed lower penetration compared to WB |
| Subject: | Ceramics Composite resins |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | FAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | 10.1016/j.jpor.2018.12.004 |
| URI: | http://hdl.handle.net/1843/45434 |
| Issue Date: | Apr-2019 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/abs/pii/S1883195818304882?via%3Dihub |
| metadata.dc.relation.ispartof: | Journal of Prosthodontic Research |
| Appears in Collections: | Artigo de Periódico |
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