Scale dependent nanomechanical properties of dentin adhesive and adhesive-collagen composite.

IF 1.5 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Frontiers in dental medicine Pub Date : 2024-11-28 eCollection Date: 2024-01-01 DOI:10.3389/fdmed.2024.1423461
Viraj Singh, Ranganathan Parthasarathy, Qiang Ye, Paulette Spencer, Anil Misra
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Abstract

The complex micrometer construct at the interface that joins the composite material to the tooth surface in restorative dentistry is composed of the composite formed by infiltrating adhesive into demineralized dentin (collagen matrix). The overall performance of composite restorations is therefore directly linked to the properties of the polymerized adhesive and adhesive-collagen composite. Nanoindentation and nanoDMA tests are performed on model methacrylate based adhesive and collagen-adhesive composite to study their mechanical properties. The adhesive collagen composite is prepared by the infiltration of dentin adhesive into a completely demineralized bovine dentin. The obtained experimental results show that both the neat adhesive and the collagen-adhesive composite are heterogeneous materials at the spatial scales of property interrogation. It is also found that the reduced elastic modulus generally decreases with increasing indentation contact depth reaching an asymptote for both neat adhesive and collagen-adhesive composite. This reduced modulus behavior can be attributed to the increase in the indentation interaction volume. In addition, the measured frequency dependent storage and loss moduli indicate that both the neat adhesive and collagen adhesive composites are viscoelastic materials which are likely to exhibit creep deformation and rate-dependent behavior in physiological function.

牙本质黏合剂及黏合剂-胶原复合材料纳米力学性能的尺度依赖性研究。
在修复牙科中,复合材料与牙齿表面连接的界面处的复杂微米结构是由将粘接剂渗透到脱矿牙本质(胶原基质)中形成的复合材料组成的。因此,复合修复体的整体性能与聚合胶粘剂和胶粘剂-胶原复合材料的性能直接相关。对模型甲基丙烯酸酯基胶粘剂和胶原-胶粘剂复合材料进行纳米压痕和纳米odma试验,研究其力学性能。通过将牙本质粘接剂渗透到完全脱矿的牛牙本质中制备粘接剂胶原复合材料。实验结果表明,在性能询问的空间尺度上,整齐胶粘剂和胶原-胶粘剂复合材料都是异质材料。同时发现,无论是纯胶粘剂还是胶原-胶粘剂复合材料,其弹性模量随压痕接触深度的增加而减小,并趋近于渐近线。这种降低模量的行为可归因于压痕相互作用体积的增加。此外,测量的频率依赖性存储模量和损耗模量表明,纯胶和胶原胶复合材料都是黏弹性材料,在生理功能上可能表现出蠕变变形和速率依赖性行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.10
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0.00%
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审稿时长
13 weeks
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