Study on Mechanical Properties of Light Cured Composite Resins

光固化复合树脂力学性能研究

• 批准号: 62570866
• 负责人: IWAMOTO Tsugio
• 金额: $ 1.02万
• 依托单位: Kanagawa Dental College
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62570866/
• 关键词: Light Cured Posterior Composite Resin; Fracture Toughness; 摩耗; 光重合型臼歯用コンポジットレジン; 破壊靭性

In this study, the influence of water sorption and thermal stress on various mechanical properties of two different types of posterior composite resins by chemically and light cured systems were investigated.The results obtained were summarized as follows. 1) Both light and chemical cured composite resins showed similar KC value and that decreased with the increase of water sorption. 2) Water immersion and thermal stress were not affected on Vickers hardness of both materials. 3) By SEM observation, fractured surfaces of light and chemically cured specimens were slightly different. With the time process increased, a remarkable number of filler particles was shown falling off or protruding from the surfaces of both composite resins. 4) Surface roughness was enhanced by water sorption and thermal stress. in addition, light cured composite was found to be rougher than chemically cured composite. 5) Under compressive and three-point-bending loading to the chemical composite resins, AE (Acoustic Emission) event counts were increased gradually with time.

本研究探讨了吸水性和热应力对两种不同类型的后牙复合树脂的化学固化和光固化体系的各种力学性能的影响，得到的结果如下。1)光固化和化学固化复合树脂的KC值相似，且随吸水率的增加而降低。2)水浸和热应力对两种材料的维氏硬度没有影响。3)通过扫描电镜观察，光固化和化学固化试样的断口形貌略有不同。随着处理时间的增加，大量的填料颗粒从两种复合树脂的表面脱落或突出。4)水吸附和热应力增强了表面粗糙度。此外，发现光固化复合材料比化学固化复合材料更粗糙。5)在压缩和三点弯曲载荷作用下，复合材料的声发射事件数随时间逐渐增加。

项目成果

熊田さえみ: 日本歯科保存学雑誌. 31. 745-759 (1988)

Saemi Kumada：日本保守牙科杂志 31. 745-759 (1988)

Koji Hanaoka: "Study on The Relation Between Component and Fracture Behavior of Posterior Composite Resins-Investigation by Means of AE Technique" Journal of Conservative Dentistry. 30. 497-519 (1987)

Koji Hanaoka：“后牙复合树脂成分与断裂行为之间关系的研究 - 通过 AE 技术进行研究”《保守牙科杂志》。

花岡孝治: 日本歯科保存学会雑誌. 30. 497-519 (1987)

Koji Hanaoka：日本保守牙科学会杂志 30. 497-519 (1987)

熊田さえみ: 神奈川歯学. 22. 715-723 (1988)

熊田佐美：神奈川牙科。22. 715-723 (1988)

熊田さえみ: 日本歯科保存学会雑誌. 31. 745-759 (1988)

Saemi Kumada：日本保守牙科学会杂志 31. 745-759 (1988)。