Biomechanical properties of human primary enamel derived the fracture toughness -comparative study of permanent enamel-

人类原生牙釉质的生物力学特性衍生断裂韧性-永久牙釉质的比较研究-

• 批准号: 22592279
• 负责人: HAYASHI-SAKAI SACHIKO
• 金额: $ 3.16万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22592279/
• 关键词: 歯学; 物性実験; バイオメカニクス; 破壊力学

The purpose of the present study was to examine the fracture toughness and Vickers microhardness number of permanent and primary human enamel using the indentation microfracture method. Crack resistance and a parameter indirectly related to fracture toughness were measured in 48 enamel specimens from 16 permanent teeth and 12 enamel specimens obtained from six primary teeth.The Vickers microhardness number of the middle portion was greater than the upper portion in primary enamel. The fracture toughness was highest in the middle portion of permanent enamel, because fracture toughness greatly depends upon microstructure. These findings suggest that primary teeth are not miniature permanent teeth but have specific and characteristic mechanical properties.

本研究的目的是用压痕微断口方法测定恒牙和乳牙釉质的断裂韧性和维氏显微硬度数。本文测定了16颗恒牙的48个釉质标本和6个乳牙的12个釉质标本的抗裂性和与断裂韧性间接相关的参数。恒牙釉质中段的断裂韧性最高，这是因为断裂韧性在很大程度上依赖于显微组织。这些发现表明，乳牙不是微型恒牙，而是具有特定和特征的机械性能。

项目成果

Determination of fracture toughness of human permanent and primary enamel using an indentation microfracture method

• DOI: 10.1007/s10856-012-4678-3
• 发表时间: 2012-05
• 期刊: Journal of Materials Science: Materials in Medicine
• 作者: S. Hayashi-Sakai;J. Sakai;M. Sakamoto;H. Endo

脛骨骨形状コンピュータモデルの座標系自動構築法

胫骨骨形计算机模型坐标系自动构建方法

• 发表时间: 2010
• 期刊: 日本臨床バイオメカニクス学会誌
• 作者: 解晨;田邊裕治;笹川圭右;古賀良生;佐藤卓;谷藤理;坂本信;小林公一
• 通讯作者: 小林公一

Numerical analysis pressure on cup surface after THA

全髋关节置换术后杯面压力数值分析

• 发表时间: 2010
• 期刊: Journal of JSEM
• 作者: Hayashi-Sakai S;Maruyama Y;Taguchi Y;Sakamoto M,Notaguchi Y,Tanabe Y,Sasagawa K,Kubota Y,Yoshida H,Kobayashi K;Sakamoto M,Kobayashi K;Kubota Y,Sakamoto M,Kobayashi K,Koga Y,Tanabe Y;Kai S,Sakamoto M,Kobayashi K,Minato I,Koga Y,Tanabe Y
• 通讯作者: Kai S,Sakamoto M,Kobayashi K,Minato I,Koga Y,Tanabe Y

ヒト関節接触領域の生体内解析

人体关节接触区域的体内分析

• 发表时间: 2010
• 期刊: トライボロジスト
• 作者: Hayashi-Sakai S;Maruyama Y;Taguchi Y;Sakamoto M,Notaguchi Y,Tanabe Y,Sasagawa K,Kubota Y,Yoshida H,Kobayashi K;Sakamoto M,Kobayashi K;Kubota Y,Sakamoto M,Kobayashi K,Koga Y,Tanabe Y;Kai S,Sakamoto M,Kobayashi K,Minato I,Koga Y,Tanabe Y;Sasagawa K,Sakamoto M,Yoshida H,Kobayashi K,Tanabe Y;坂本信
• 通讯作者: 坂本信

距骨および踵骨海綿骨のMRIによるIn Vivo構造解析

距骨和跟骨松质骨的MRI体内结构分析

• 发表时间: 2010
• 期刊: 日本臨床バイオメカニクス学会誌
• 作者: Hayashi-Sakai S;Maruyama Y;Taguchi Y;Sakamoto M,Notaguchi Y,Tanabe Y,Sasagawa K,Kubota Y,Yoshida H,Kobayashi K;Sakamoto M,Kobayashi K;Kubota Y,Sakamoto M,Kobayashi K,Koga Y,Tanabe Y;Kai S,Sakamoto M,Kobayashi K,Minato I,Koga Y,Tanabe Y;Sasagawa K,Sakamoto M,Yoshida H,Kobayashi K,Tanabe Y;坂本信;坂本信,小林公一,吉田秀義,笹川圭右,窪田陽介
• 通讯作者: 坂本信,小林公一,吉田秀義,笹川圭右,窪田陽介