Influence of the nano-hardness and elastic modulus of carious primary tooth dentin to resin adhesion

龋齿乳牙牙本质纳米硬度和弹性模量对树脂粘附的影响

• 批准号: 14571955
• 负责人: HOSOYA Yumiko
• 金额: $ 2.3万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14571955/
• 关键词: Primary tooth; under decay dentin; sound dentin; nano-hardness; elastic modulus; micro-tensile bond strength; adhesive resin; Novel Iig system for micro-tensile strength; 接着性レジン; 微少硬度; 微少引張接着強さ; 接着試験用jig

<Objective> :To compare the influence of the hardness and elasticity to resin adhesion between carious and sound dentin.<Results> :1.Development of originally designed jig system for micro-tensile strength Testing :New system for primary teeth has been developed.2.Hardness, elasticity and micro-tensile strengths of the carious and sound primary dentin :Physical properties of extracted primary tooth dentin were lower than permanent tooth dentin, especially for the dentin under the lesion and near me pulp.3.Hardness and elasticity of bonded carious and sound dentin :Clearfil Mega Bond (MB group, Kuraray Co.) and Single Bond (3M ESPE Co.Ltd.) were used. Compared to the dentin beneath the resin/dentin interface, the hardness of the interface dentin were higher and showed contrary results to previously reported permanent teeth. But, Young's modulus of the interface dentin were lower than dentin beneath the interface, same as for permanent teeth. No significant difference was found between the carious and sound groups.4.Micro-tensile bond strength(MTBS) for sound and carious dentin :MB or SB was applied on the extracted primary tooth dentin. Dumbbell-shaped and stick-shaped specimens were prepared. The mean MTBS of both dumbbell-shaped and stick-shaped specimens were low, and under 10MPa. No significant difference was found between the MB and SB, and sound and carious groups.<Conclusion> :When bonded to carious dentin, the HL was thicker, but the MTBS was low in both the carious and sound groups. The properties of primary tooth dentin might differ from permanent dentin, thus treatments designed based on permanent tooth dentin may not be optimized for primary tooth dentin. New system based on the physical properties of primary tooth dentin should be required.

<客观>：比较龋齿和声音牙本质之间的硬度和弹性对树脂粘附的影响。<结果>：1。最初设计的微张力强度测试设计的夹具系统的开发：已经开发了新的原发性牙齿系统。22。含量，弹性和较低牙齿的牙齿质量较低的牙齿的弹性，弹性和微含量较低的牙齿的牙齿较低的牙齿：牙本质在病变下和我附近的果肉下。3。使用粘性和声音牙本质的hard和弹性：Clearfil Mega Bond（MB Group，Kuraray Co.）和单键（3M ESPE CO.LTD。）。与树脂/牙本质界面下方的牙本质相比，牙本质的硬度更高，与先前报道的恒牙相反。但是，杨氏牙本质的模量低于界面下方的牙本质，与永久牙齿相同。在龋齿和声音组之间没有发现显着差异。4。用于声音和保育牙本质的微张紧键强度（MTB）：将MB或SB应用于提取的原发性牙齿牙本质上。制备了哑铃形和棍棒形的标本。两个哑铃形和棒状标本的平均MTB均低，低于10MPa。 MB和SB之间没有发现显着差异。原发性牙齿牙本质的特性可能与永久性牙本质不同，因此基于永久性牙齿牙本质设计的处理可能不会针对原代牙齿进行优化。应该基于原发性牙齿的物理特性的新系统。

项目成果

Hosoya Y., Marshall Jr G.W.: "The nano-hardness and elastic modulus of carious and sound primary canine dentin"Operative Dentistry. 29・1(in press). (2004)

Hosoya Y.，Marshall Jr G.W.：“龋齿和健全的初级犬牙本质的纳米硬度和弹性模量”29・1（印刷中）。

The nano-hardness and elastic modulus of carious and sound primary canine dentin.

龋齿和健全犬初级牙本质的纳米硬度和弹性模量。

• 发表时间: 2004
• 期刊: Operative Dentistry 29(2)
• 作者: Y.Hosoya;GW Marshall Jr.
• 通讯作者: GW Marshall Jr.

The nano-hardness and elastic modulus of carious and sound primary canine dentin

犬龋牙本质和健全牙本质的纳米硬度和弹性模量

• 发表时间: 2004
• 期刊: Operative Dentistry 29
• 作者: Y.Hosoya;GW Marshall Jr.
• 通讯作者: GW Marshall Jr.