Andreasi Bassi M, Andreasi Bassi S, Andrisani C, Lico S, Baggi L, Lauritano D
Private practice in Rome, Italy.
Private practice in Matera, Italy.
Oral Implantol (Rome). 2017 Feb 14;9(Suppl 1-2016 to N 4-2016):80-89. doi: 10.11138/orl/2016.9.1S.080. eCollection 2016 Jan-Mar.
Evaluate how the spherical glass mega fillers (SGMFs) can positively interfere with light diffusion when incorporated in a composite restoration.
30 samples (Ss) were performed, applying 2 composite layers of 3 mm each: 6 were made with composite only; 6 with a layer of SGMFs of O1.5mm within the first layer of composite; 6 with 2 overlapping layers of SGMFs of O1.5mm; 6 with a layer of SGMFs of O2mm; 6 with 2 overlapping layers of SGMFs of O2mm. The curing time was set at 40s for the first layer, and 120s for the second layer, transilluminated through the first layer. Digital pictures were taken, in standardized settings, during the transillumination, and the light intensity was measured with a digital image analysis software.
From a lateral view the Ss with a single layer of SGMFs of O1.5mm and O2mm, the relative increments of light intensity, were of 24.37% and 33.33% respectively. Concerning the Ss made with 2 layers of SGMFs, the relative increments were of 67.99% and 66.4% respectively. In front view has emerged a relative increase rate of light intensity of 53.66% and 79.58%, in the Ss with a single layer of SGMFs of O1.5mm and of O2mm respectively. Furthermore, in the Ss with two layers of SGMFs of O1.5mm and O2mm the relative increments were of 267.53 and 319.63% respectively.
The SGMFs are reliable in facilitating light diffusion within the light-curing composite resins.
评估球形玻璃大颗粒填料（SGMFs）在复合树脂修复体中对光扩散的积极影响。
制备30个样本，每层复合树脂厚度为3mm，共两层：6个样本仅使用复合树脂；6个样本在第一层复合树脂中加入一层直径1.5mm的SGMFs；6个样本使用两层重叠的直径1.5mm的SGMFs；6个样本在第一层复合树脂中加入一层直径2mm的SGMFs；6个样本使用两层重叠的直径2mm的SGMFs。第一层固化时间设定为40秒，第二层通过第一层进行透照，固化时间设定为120秒。在透照过程中，按照标准化设置拍摄数码照片，并使用数字图像分析软件测量光强度。
从侧面看，含有一层直径1.5mm和2mm的SGMFs的样本，光强度相对增量分别为24.37%和33.33%。对于含有两层SGMFs的样本，相对增量分别为67.99%和66.4%。从正面看，含有一层直径1.5mm和2mm的SGMFs的样本，光强度相对增加率分别为53.66%和79.58%。此外，含有两层直径1.5mm和2mm的SGMFs的样本，相对增量分别为267.53%和319.63%。
SGMFs在促进光固化复合树脂内的光扩散方面是可靠的。
