The effect of hyper-branched polymers on the properties of dental composites and adhesives
The effect of hyper-branched polymers on the properties of dental composites and adhesives
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DOI：
10.1163/1568561042708304
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发表时间：
2004-01-01
影响因子：
2.3
通讯作者：
Kenig, S
中科院分区：
文献类型：
--
作者：
Dodiuk-Kenig, H;Lizenboim, K;Kenig, S
随着商业超支化（HB）和树枝状聚合物的出现，其具有三维（3D）形态和高外围官能度，为配制具有增强的机械和物理性能的牙科粘合剂和复合材料创造了新的机会。本研究的目的是调查通过将HB和树枝状聚合物纳入丙烯酸酯基牙科复合材料和粘合剂系统所获得的性能。评估了四种商业HB聚合物：聚酰胺-胺树状聚合物、两种树状聚酰胺和HB聚酯酰胺。这些添加到牙科修复玻璃填充预聚物中，基于BisGMA，HEMA和TEGDMA。树枝状聚合物和HB聚合物容易与预聚物共混。HB聚酯酰胺（HB 1），添加量（0.1-3.0重量%）对力学性能的显着影响。发现添加0.3wt%（最佳值）的HB聚酯酰胺将压缩强度从253：1：20 MPa提高到386 +/-20 MPa，并且将线性收缩率从2.4 +/-0.2%降低到1.5 +/-0.2%（对于模型牙科复合物制剂）。结果表明，添加到牙科粘合剂组合物中的HB聚酯酰胺增加了剪切粘结强度并增强了对各种牙科表面的粘结耐久性。
With the emergence of commercial hyper-branched (HB) and dendritic polymers, having a three-dimensional (3D) morphology with high peripheral functionality, new opportunities have been created for formulating dental adhesives and composites with enhanced mechanical and physical properties. The objective of the present study was to investigate the properties obtained by incorporating HB and dendritic polymers into acrylate-based dental composite and adhesive systems. Four commercial HB polymers were evaluated: Polyamidoamine dendrimer, two dendripolyamides and HB polyesteramide. These were added to dental restorative glass filled prepolymers, based on BisGMA, HEMA and TEGDMA. The dendritic and HB polymers blended readily with the prepolymers. A significant effect of HB polyesteramide (HB1), addition (0.1-3.0 wt%) on the mechanical properties was shown. It was found that addition of 0.3 wt% (optimal value) of HB polyesteramide raised the compressive strength from 253 :1: 20 MPa to 386 +/- 20 MPa and lowered the linear shrinkage from 2.4 +/- 0.2% to 1.5 +/- 0.2 % (for a model dental composite formulation). It was shown that the HB polyesteramide added to the dental adhesive compositions increased the shear bond strength and enhanced the bond durability to a variety of dental surfaces.