Christina Karanasiou, Dimitrios Dionysopoulos, Petros Mourouzis, Dimitrios Strakas, Olga Naka, Kosmas Tolidis
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引用次数: 0
摘要
本研究评估了三种树脂基修复材料在使用铒、铬:钇钪镓石榴石(Er,Cr:YSGG)或二极管(980 nm)激光进行两种激光辅助诊室牙齿漂白后表面性质的变化。测试了纳米混合复合材料(Enamel Plus HRi)、不含双-GMA 的复合材料(Enamel Plus HRi Bio Function)和树脂基质 CAD-CAM 陶瓷(Shofu Block HC)。每种材料制备了 40 个试样,分为四组(n = 10/组)。对照组未进行任何漂白处理,第 2 组使用 40% 过氧化氢(H2O2)进行漂白,第 3 组和第 4 组分别使用二极管激光器(980 纳米)或 Er,Cr:YSGG 激光器进行相同的漂白处理。使用维氏硬度计和光学轮廓仪测量表面显微硬度和粗糙度。漂白试样的显微硬度较低,纳米杂化复合材料与无漂白组的差异最大。对于不含 Bis-GMA 的复合材料,无漂白和激光辅助漂白之间的显微硬度差异小于传统漂白技术。漂白试样的表面粗糙度较高,纳米杂化复合材料与对照试样的差异最大。研究发现,激光辅助牙齿漂白方案不会影响受测树脂基试样的表面显微硬度和粗糙度,因此适合临床使用。
Effect of laser irradiation during in-office tooth bleaching on surface properties of resin-based restorative materials
This study evaluated the changes in surface properties of three resin-based restorative materials after two laser-assisted, in-office tooth bleaching protocols using erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) or diode (980 nm) lasers. A nanohybrid composite (Enamel Plus HRi), a Bis-GMA-free composite (Enamel Plus HRi Bio Function), and a resin-matrix CAD-CAM ceramic (Shofu Block HC) were tested. Forty specimens for each material were prepared and divided into four groups (n = 10/group). The control specimens did not undergo any bleaching treatment, whereas group 2 received bleaching with 40% hydrogen peroxide (H2O2), while groups 3 and 4 underwent the same bleaching procedure with the use of diode (980 nm) or Er,Cr:YSGG lasers, respectively. Surface microhardness and roughness measurements were conducted using a Vickers tester and an optical profilometer. Microhardness was lower in bleached specimens, with the nanohybrid composite exhibiting the largest difference from the no bleaching group. For the Bis-GMA-free composite the microhardness difference between no bleaching and laser-assisted bleaching were smaller than seen for the conventional bleaching technique. Surface roughness was higher in bleached specimens, with nanohybrid composite showing the largest differences from the control specimens. The examined laser-assisted tooth bleaching protocols were found not to impact surface microhardness and roughness of the tested resin-based specimens and they are deemed suitable for clinical use.
期刊介绍:
The European Journal of Oral Sciences is an international journal which publishes original research papers within clinical dentistry, on all basic science aspects of structure, chemistry, developmental biology, physiology and pathology of relevant tissues, as well as on microbiology, biomaterials and the behavioural sciences as they relate to dentistry. In general, analytical studies are preferred to descriptive ones. Reviews, Short Communications and Letters to the Editor will also be considered for publication.
The journal is published bimonthly.