Refractive index mismatch and monomer reactivity influence composite curing depth
Refractive index mismatch and monomer reactivity influence composite curing depth
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DOI：
10.1177/154405910808700115
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发表时间：
2008-01-01
影响因子：
7.6
通讯作者：
Burtscher, P.
中科院分区：
文献类型：
--
作者：
Shortall, A. C.;Palin, W. M.;Burtscher, P.
有限的固化深度是光活化复合材料的缺点。我们假设固化光透射率和固化深度受单体反应性和填料/树脂折射率失配的影响。记录了基于锶（折射率1.51）或钡（折射率1.53）玻璃填料的复合材料在整个固化过程中的透光率。将填料（70重量%）与折射率范围为1.4703至1.5370的4种双酚-A二缩水甘油醚-二甲基丙烯酸酯（bis-GMA）：三甘醇二甲基丙烯酸酯（TEGDMA）制剂混合。在聚合之后，测定固化深度和固化前后的透明性参数。与单体反应性和填料/树脂折射率不匹配相关的透射率变化和固化深度，具有显著的相互作用。复合材料在固化时变得更加不透明或半透明。优化填料/树脂折射率不匹配提供了增加的固化深度，并有助于色调匹配。
Limited cure depth is a drawback of light-activated composites. We hypothesize that curing light transmission and cure depth are influenced by monomer reactivity and filler/resin refractive index mismatch. Light transmission throughout cure was recorded for composites based on strontium ( refractive index 1.51) or barium ( refractive index 1.53) glass fillers. Fillers were mixed ( 70 wt%) with 4 bisphenol-A diglycidyl-ether-dimethacrylate (bis-GMA): triethylene glycol dimethacrylate ( TEGDMA) formulations with refractive indices ranging from 1.4703 to 1.5370. Following polymerization, cure depth and pre- and post-cure translucency parameters were determined. Transmission changes and cure depths related to monomer reactivity and filler/resin refractive index mismatch with significant interaction. Composites became more opaque or translucent on curing. Optimizing filler/resin refractive index mismatch provides increased curing depth and assists shade-matching.