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Nanohybrid resin composites: nanofiller loaded materials or traditional microhybrid resins?纳米杂化树脂复合材料：负载纳米填料的材料还是传统的微杂化树脂？
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Effect of LED light-curing on the relative hardness of tooth-colored restorative materials.
Oper Dent. 2009 Jan-Feb;34(1):65-71. doi: 10.2341/08-38.
3
Depth of cure of dental resin composites: ISO 4049 depth and microhardness of types of materials and shades.牙科树脂复合材料的固化深度：ISO 4049规定的材料类型和色号的深度及显微硬度
Oper Dent. 2008 Jul-Aug;33(4):408-12. doi: 10.2341/07-104.
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Influence of light-polymerization modes on the degree of conversion and mechanical properties of resin composites: a comparative analysis between a hybrid and a nanofilled composite.光聚合模式对树脂复合材料转化率和力学性能的影响：混合复合材料与纳米填充复合材料的对比分析
Oper Dent. 2008 May-Jun;33(3):287-93. doi: 10.2341/07-81.
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Evaluation of curing light distance on resin composite microhardness and polymerization.光固化灯距离对树脂复合材料显微硬度和聚合反应的影响评估。
Oper Dent. 2007 Nov-Dec;32(6):571-8. doi: 10.2341/06-163.
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Influence of light polymerization modes on degree of conversion and crosslink density of dental composites.
J Mater Sci Mater Med. 2008 Mar;19(3):1027-32. doi: 10.1007/s10856-007-3220-5. Epub 2007 Aug 1.
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The effectiveness of different polymerization protocols for class II composite resin restorations.用于II类复合树脂修复体的不同聚合方案的有效性。
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Light-emitting diode curing light irradiance and polymerization of resin-based composite.发光二极管固化灯的辐照度与树脂基复合材料的聚合反应
J Am Dent Assoc. 2006 Feb;137(2):213-23. doi: 10.14219/jada.archive.2006.0147.
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Variation of depth of cure and intensity with distance using LED curing lights.
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Relative curing degree of polyacid-modified and conventional resin composites determined by surface Knoop hardness.通过表面努氏硬度测定的多元酸改性树脂复合材料和传统树脂复合材料的相对固化程度。
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六种采用不同聚合方式光固化的复合树脂的维氏硬度及固化深度评估。

Evaluation of Vickers hardness and depth of cure of six composite resins photo-activated with different polymerization modes.

作者信息

Poggio C, Lombardini M, Gaviati S, Chiesa M

机构信息

Department of Operative Dentistry, University of Pavia, Policlinico "San Matteo", Piazzale Golgi 2, 27100 Pavia, Italy.

出版信息

J Conserv Dent. 2012 Jul;15(3):237-41. doi: 10.4103/0972-0707.97946.

DOI:10.4103/0972-0707.97946
PMID:22876009
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3410332/
Abstract

AIM

The current in vitro study evaluated Vickers hardness (VK) and depth of cure (hardness ratio) of six resin composites, polymerized with a light-emitting diode (LED) curing unit by different polymerization modes: Standard 20 s, Standard 40 s, Soft-start 40 s.

MATERIALS AND METHODS

SIX RESIN COMPOSITES WERE SELECTED FOR THE PRESENT STUDY: three microhybrid (Esthet.X HD, Amaris, Filtek Silorane), two nanohybrid (Grandio, Ceram.X mono) and one nanofilled (Filtek Supreme XT). The VK of the surface was determined with a microhardness tester using a Vickers diamond indenter and a 200 g load applied for 15 seconds. The mean VK and hardness ratio of the specimens were calculated using the formula: hardness ratio = VK of bottom surface / VK of top surface.

RESULTS

For all the materials tested and with all the polymerization modes, hardness ratio was higher than the minimum value indicated in literature in order to consider the bottom surface as adequately cured (0.80). Curing time did not affect hardness ratio values for Filtek Silorane, Grandio and Filtek Supreme XT.

CONCLUSION

The effectiveness of cure at the top and bottom surface was not affected by Soft-start polymerization mode.

摘要

目的

当前的体外研究评估了六种树脂复合材料的维氏硬度（VK）和固化深度（硬度比），这些材料通过发光二极管（LED）固化单元以不同的聚合模式进行聚合：标准20秒、标准40秒、软启动40秒。

材料与方法

本研究选用了六种树脂复合材料：三种微混合材料（Esthet.X HD、Amaris、Filtek Silorane）、两种纳米混合材料（Grandio、Ceram.X mono）和一种纳米填充材料（Filtek Supreme XT）。使用维氏金刚石压头的显微硬度测试仪，在200克载荷下施加15秒来测定表面的VK。使用公式：硬度比=底面VK/顶面VK来计算试样的平均VK和硬度比。

结果

对于所有测试材料和所有聚合模式，硬度比均高于文献中为将底面视为充分固化而指出的最小值（0.80）。固化时间对Filtek Silorane、Grandio和Filtek Supreme XT的硬度比值没有影响。

结论

软启动聚合模式不影响顶面和底面的固化效果。