Viscoelastic properties of collagen-adhesive composites under water-saturated and dry conditions.
Viscoelastic properties of collagen-adhesive composites under water-saturated and dry conditions.
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DOI：
10.1002/jbm.a.35204
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发表时间：
2015-02
影响因子：
4.9
通讯作者：
Spencer, Paulette
中科院分区：
文献类型：
--
作者：
Singh, Viraj;Misra, Anil;Parthasarathy, Ranganathan;Ye, Qiang;Spencer, Paulette
关键词：
为了研究胶原-粘合剂复合材料的时间和速率依赖性机械性能，在干燥和潮湿条件下进行了蠕变和单调实验。该复合材料是通过将牙本质粘合剂渗透到脱矿的牛牙本质中来制备的。实验结果表明，对于干燥条件下的小应力水平，复合材料和纯粘合剂都具有相似的行为。另一方面，在潮湿条件下，与纯粘合剂相比，复合材料明显柔软且脆弱。发现潮湿条件下的行为受到粘合剂和胶原蛋白的亲水性的影响。由于粘合剂-胶原复合材料是形成粘合剂-牙本质界面的复杂结构的一部分，因此它们的存在将影响修复体的整体性能。我们发现至少需要 4 个元素的 Kelvin-Voigt 模型才能拟合蠕变柔量数据，这表明粘合剂-胶原复合材料是具有多种特征时间尺度的复杂聚合物，其机械行为将受到加载速率和频率的显着影响。这些类型材料的机械性能尚未得到广泛研究。导出的模型提供了一个额外的优点，即可以利用它来提取其他粘弹性属性，而这些属性通常需要通过实验才能获得。校准模型用于获得应力松弛函数、频率相关存储模量和损耗模量以及速率相关弹性模量。
To investigate the time and rate dependent mechanical properties of collagen-adhesive composites, creep and monotonic experiments are performed under dry and wet conditions. The composites are prepared by infiltration of dentin adhesive into a demineralized bovine dentin. Experimental results show that for small stress level under dry conditions, both the composite and neat adhesive have similar behavior. On the other hand, in wet conditions, the composites are significantly soft and weak compared to the neat adhesives. The behavior in the wet condition is found to be affected by the hydrophilicity of both the adhesive and collagen. Since the adhesive-collagen composites area part of the complex construct that forms the adhesive-dentin interface, their presence will affect the overall performance of the restoration. We find that Kelvin-Voigt model with at least 4-elements is required to fit the creep compliance data, indicating that the adhesive-collagen composites are complex polymers with several characteristics time-scales whose mechanical behavior will be significantly affected by loading rates and frequencies. Such mechanical properties have not been investigated widely for these types of materials. The derived model provides an additional advantage that it can be exploited to extract other viscoelastic properties which are, generally, time consuming to obtain experimentally. The calibrated model is utilized to obtain stress relaxation function, frequency-dependent storage and loss modulus, and rate dependent elastic modulus.
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影响因子：
14
作者：
Shanmugasundaram, N;Ravichandran, P;Rao, KP
通讯作者：
Rao, KP
DOI：
10.1002/jbm.b.31987
发表时间：
2012-02
期刊：
Journal of biomedical materials research. Part B, Applied biomaterials
影响因子：
--
作者：
Park J;Ye Q;Singh V;Kieweg SL;Misra A;Spencer P
通讯作者：
Spencer P
DOI：
10.1002/jbm.b.30012
发表时间：
2004-07-15
影响因子：
3.4
作者：
Misra, A;Spencer, P;Katz, JL
通讯作者：
Katz, JL
影响因子：
7.6
作者：
Chiaraputt, S.;Mai, S.;Tay, F. R.
通讯作者：
Tay, F. R.
影响因子：
5
作者：
Armstrong, SR;Boyer, DB;Keller, JC
通讯作者：
Keller, JC