Caldas Danilo Biazzetto de Menezes, de Almeida Janaina Bertoncelo, Correr-Sobrinho Lourenço, Sinhoreti Mário Alexandre Coelho, Consani Simonides
Piracicaba Dental School, Piracicaba-São Paulo, Brazil.
Oper Dent. 2003 May-Jun;28(3):315-20.
This in vitro study evaluated the influence of curing tip distance on the Knoop Hardness Number (KHN) of a resin composite when using three different light curing units: (1) a halogen light (XL 1500 curing unit-3M), (2) a "softstart-polymerization" (Elipar Trilight curing in an exponential mode-ESPE) and (3) a PAC (Apolo 95E curing unit-DMD). The resin composite, Filtek Z250 (3M), was cured by these curing units at three light-tip distances from the resin composite: 0 mm, 6 mm and 12 mm. The resin composite specimens were flattened to their middle portion and submitted to 18 KHN measurements perspecimen. The results showed that for the Elipar Trilight unit, the hardness of the resin composite decreased as the light tip distance increased. The XL 1500 unit presented a significant decrease in hardness as the depth of cure of the resin composite increased. Apolo 95E caused a decrease in the resin composite hardness values when the depth of cure and light tip distance increased.
这项体外研究评估了在使用三种不同光固化装置时，固化头距离对树脂复合材料努氏硬度值（KHN）的影响：（1）卤素灯（XL 1500固化装置 - 3M公司），（2）“软启动聚合”（依丽倍加TriLight以指数模式固化 - ESPE公司）以及（3）一种PAC（阿波罗95E固化装置 - DMD公司）。树脂复合材料Filtek Z250（3M公司）由这些固化装置在距树脂复合材料三个不同的光固化头距离下进行固化：0毫米、6毫米和12毫米。将树脂复合材料试样的中间部分磨平，每个试样进行18次努氏硬度测量。结果表明，对于依丽倍加TriLight装置，随着光固化头距离增加，树脂复合材料的硬度降低。随着树脂复合材料固化深度增加，XL 1500装置的硬度显著下降。当固化深度和光固化头距离增加时，阿波罗95E装置会使树脂复合材料的硬度值降低。
