应用数学和力学2012，Vol.33Issue(3)：320-331,12.DOI:10.3879/j.issn.1000-0887.2012.03.005
增龄对人牙本质失水收缩的重要性
Importance of Aging to the Dehydration Shrinkage of Human Dentin
摘要
Abstract
There was an increase in the mineral content of human dentin with aging. Due to the consequent changes in mineral to collagen ratio, this process may influence the degree of hydrogen bonding that occurs with loss of water and the extent of shrinkage as a result of dehydration. Thus, the objective of this investigation was to quantify the differences in dehydration shrinkage of human dentin with patient age. Specimens of coronal dentin were prepared from the molars of young (23 ≤ age≤34) and old (52 ≤ age ≤ 62) patients and then maintained in storage solutions of water or Hanks balanced salt solution (HBSS). Dimensional changes of the dentin specimens occurring over periods of free convection were evaluated using microscopic digital image correlation (DIC). Results distinguished that the shrinkage of young dentin is significantly larger than that for old dentin, regardless of orientation and period of storage (p < 0. 01). Strains parallel to the tubules increased with proximity to the dentin enamel junction (DEJ) whereas the shrinkage strains in the transverse direction were largest in deep dentin (I. E. Near the pulp). The degree of anisotropy in shrinkage increased from the pulp to the DEJ and was largest in young dentin.关键词
牙本质/DIC/矿物成分/硬化症/收缩Key words
dentin/ DIC/ mineral content/ sclerosis/ shrinkage分类
化学化工引用本文复制引用
汪饶饶,毛霜霜,依赖恩·隆伯格,德温·阿罗拉,张东升..增龄对人牙本质失水收缩的重要性[J].应用数学和力学,2012,33(3):320-331,12.基金项目
国家自然科学基金资助项目(11172161) （11172161）
上海市重点学科建设基金资助项目(S30106) （S30106）
上海市教委重点基金资助项目(12ZZ092) （12ZZ092）
口腔疾病研究国家重点实验室(四川大学)开放基金资助项目(SKLODSCU2009KF03) （四川大学）
上海市科委基金资助项目(10410701900 （）
11195820900:10ZR1423400) （）
美国国立牙科和颅面研究基金资助项目(R01-DE016904) （R01-DE016904）
