Study on factors affecting the failure, deformation and adhesive durability of fluoride-releasing restorative materials

含氟修复材料破坏、变形及粘接耐久性影响因素研究

• 批准号: 12671899
• 负责人: NAKAJIMA Hiroshi
• 金额: $ 1.73万
• 依托单位: Meikai University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671899/
• 关键词: Filling Materials; Fluoride; Glass Ionomers; Strength; Adhesion; 強さ; 充填材料

The main goal of this study was to obtain the knowledge in the factors affecting the failure and deformation and the adhesive durability of fluoride-releasing materials under the various mechanical or chemical stress conditions, in order to develop more durable fluoride-releasing materials in the oral cavity. To achieve this goal the study mainly focused to characterize the failure and deformation behavior of commercially available fluoride-releasing restorative materials. Conventional glass ionomers increased strength with time; however, the ambient water and the acidic atmosphere deteriorate the surface texture. This would reduce the failure resistance of these materials. Resin-modified (light-cured) glass ionomers showed larger mechanical strength than the conventional ones because of incorporation of resin components into the matrix. The incorporated resin components notably enlarged elastic and residual deformation under static loading condition. The large deformation under stress, which exceeds the amount of deformation of tooth, would negatively influence the durability of materials when they were placed in the cavities. Glass ionomer-modified resin composites (compomers) or fluoride-releasable resin composite showed the greatest strength under any conditions employed among the fluoride-releasing materials examined in the study. This could be obtained from the strength and properties of the matrix made from resin. The adhesive strength to bovine dentin of compomers reduced after the repeated loading. As compared to other materials, these materials revealed the greatest resistance to fracture when the specimens were subjected to repeated shear loading condition. The durability of adhesion depended upon the bonding treatment used in these materials. Since the compomers have larger water sorption, the bonding strength between the compomer and the bonding agent would be a critical factor for durability. Further investigation will be made in future.

本研究的主要目的是了解口腔氟释放材料在各种机械或化学应力条件下破坏变形的影响因素及粘结耐久性，以开发更耐用的口腔氟释放材料。为了实现这一目标，本研究主要集中于表征市售的释氟修复材料的破坏和变形行为。传统的玻璃离子材料随着时间的推移强度增加，但环境水和酸性气氛会使表面纹理恶化。这将降低这些材料的抗毁性。树脂改性(光固化)玻璃离子由于在基质中加入了树脂组分，因此比传统玻璃离子具有更高的机械强度。加入的树脂组分在静载条件下显著增大了弹性变形和残余变形。应力作用下的大变形量超过了牙齿的变形量，会对材料放置在空洞中的耐久性产生不利影响。玻璃离子改性树脂复合体(复合体)或氟化物释放树脂复合体在研究中检测的氟化物释放材料中，在任何条件下都显示出最大的强度。这可以通过树脂制成的基质的强度和性能来获得。复合体对牛牙本质的粘接强度在反复加载后有所下降。与其他材料相比，当试件处于反复剪切加载条件下时，这些材料显示出最大的抗断裂能力。粘接的耐久性取决于在这些材料中使用的粘合处理。由于复合体具有较大的吸水率，因此复合体与粘结剂之间的粘结强度将是影响耐久性的关键因素。今后将对此进行进一步调查。