Importance of age on the dynamic mechanical behavior of intertubular and peritubular dentin.
Importance of age on the dynamic mechanical behavior of intertubular and peritubular dentin.
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DOI：
10.1016/j.jmbbm.2014.11.021
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发表时间：
2015-02
影响因子：
3.9
通讯作者：
Arola, Dwayne
中科院分区：
文献类型：
--
作者：
Ryou, Heonjune;Romberg, Elaine;Pashley, David H.;Tay, Franklin R.;Arola, Dwayne
使用纳米动态力学分析（nanoDMA）对人类冠状牙本质进行了实验评估。主要目标是量化管间和管周牙本质随年龄的机械行为的任何独特变化，并评估沉积在管腔内的矿物质的微观结构和机械行为。使用单压痕并通过扫描探针显微镜在扫描模式下通过 nanoDMA 评估冠状牙本质样本。结果显示，两个年龄组（18-25 岁与 54-83 岁）之间的管间或管周组织的储能模量或复数模量没有显着差异。然而，年轻和年老牙本质之间的阻尼行为存在显着差异，如损耗模量和 tanδ 响应所示。对于管间和管周组件，旧组的阻尼能力明显较低。基于 nanoDMA 的扫描显示，旧牙本质小管表现出弹性行为梯度，从套囊到充满新沉积矿物质的小管中心，弹性模量降低。
An experimental evaluation of human coronal dentin was performed using nanoscopic Dynamic Mechanical Analysis (nanoDMA). The primary objectives were to quantify any unique changes in mechanical behavior of intertubular and peritubular dentin with age, and to evaluate the microstructure and mechanical behavior of the mineral deposited within the lumens. Specimens of coronal dentin were evaluated by nanoDMA using single indents and in scanning mode via scanning probe microscopy. Results showed that there were no significant differences in the storage modulus or complex modulus between the two age groups (18–25 versus 54–83 yrs) for either the intertubular or peritubular tissue. However, there were significant differences in the dampening behavior between the young and old dentin, as represented in the loss modulus and tanδ responses. For both the intertubular and peritubular components, the capacity for dampening was significantly lower in the old group. Scanning based nanoDMA showed that the tubules of old dentin exhibit a gradient in elastic behavior, with decrease in elastic modulus from the cuff to the center of tubules filled with newly deposited mineral.
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影响因子：
9.7
作者：
Kim, Young Kyung;Mai, Sui;Mazzoni, Annalisa;Liu, Yan;Tezvergil-Mutluay, Arzu;Takahashi, Kei;Zhang, Kai;Pashley, David H.;Tay, Franklin R.
通讯作者：
Tay, Franklin R.
影响因子：
2.4
作者：
Habelitz, S;Marshall, GW;Marshall, SJ
通讯作者：
Marshall, SJ
影响因子：
14
作者：
Arola, D;Reprogel, RK
通讯作者：
Reprogel, RK
影响因子：
3
作者：
Balooch, M.;Habelitz, S.;Marshall, G. W.
通讯作者：
Marshall, G. W.
影响因子：
6
作者：
Arola, D.;Bajaj, D.;Zhang, D.
通讯作者：
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