A Study on Light-cured Type II Glass-ionomer Cement for Repair

修复用光固化II型玻璃离子水门汀的研究

• 批准号: 11671907
• 负责人: TAKASHI Kuroda
• 金额: $ 1.98万
• 依托单位: Nihon-University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11671907/
• 关键词: Esthetics; Patch restoration; Glass-ionomner cement; bond strength; Flexural strength; Bondin agent; サーマルサイクル; 曲げ強さ; 接着性

There are some occasions in the use of light-cured glass-ionomer cements (LCGIC) when it is necessary for repairs to be made to aged restorations. It has been reported that the highest bond strength was obtained with the reduction of aged cements followed by bonding agent application. The purpose of this study was to examine the effect of thermal cycling on bond strength between aged LCGIC and newly added LCGIC using various bonding agents. Also, the flexural strength of repaired cements was measured.Two LCGICs, Fuji Ionomer Type IILC (GC) and Vitremer (3M), and five commercially available bonding agents were employed. After thermal cycling for 10,000 cycles, bonding agents were applied on the cement specimens. After surface treatment, LCGIC was condensed into molds placed on the aged cement and light activated. The finished specimens were subjected to thermal cycling for 1,000, 3,000, and 10,000 cycles to simulate the degradation occurring in oral environment. These samples were stored in 37℃ water for 24 hours, then shear bond strength test and flexural strength test were carried out using an Instron testing machine (Type 4204, Instron) at a crosshead speed of 1.0 mm/min. The results were as follows :1. Thermal cycling decreased the bond strengths between aged and newly added LCGICs. This tendency was less for the filled bonding agents than non-filled bonding agents.2. After the bond strength tests, the failure modes of the specimen made with filled bonding agents revealed mixed or cohesive failure. Adhesive failure tended to increase with increasing thermal cycles .Thermal cycling decreased the flexural strengths of repaired LCGIC.This tendency was less for the filled bonding agents than non-filled bonding agents.

在某些情况下，当需要对老化牙槽骨进行修复时，使用光固化玻璃离子水门汀（LCGIC）。据报道，最高的粘结强度与老化水泥的减少，其次是粘结剂的应用。本研究的目的是研究热循环对使用不同粘结剂的老化LCGIC和新添加的LCGIC之间的粘结强度的影响。此外，还测量了修复水泥的弯曲强度。使用了两种LCGIC，Fuji Ilium Type IILC（GC）和Vitremer（3 M），以及五种市售粘结剂。在热循环10，000次循环后，将粘合剂施加到水泥样本上。在表面处理之后，LCGIC被冷凝到放置在老化的水泥上的模具中并且被光活化。对成品样本进行1，000、3，000和10，000次热循环，以模拟口腔环境中发生的降解。将这些样品在37℃水中储存24小时，然后使用Instron试验机（4204型，Instron）以1.0 mm/min的十字头速度进行剪切粘结强度测试和弯曲强度测试。热循环降低了老化和新添加的LCGIC之间的粘结强度。这种趋势是较小的填充粘结剂比非填充粘结剂。在粘结强度测试之后，用填充粘结剂制成的试样的失效模式显示混合或内聚失效。随着热循环次数的增加，粘接失效率有增加的趋势，热循环降低了修复后LCGIC的弯曲强度，但填充粘接剂的这种趋势小于非填充粘接剂。

项目成果

坪田 圭司: "光硬化型グラスアイオノマーセメントの補修修復に関する研究-とくにサーマルサイクルが新旧修復物間の接着強さおよび曲げ強さにおよぼす影響について-"日本歯科保存学雑誌. 42・6. 1081-1088 (1999)

Keiji Tsubota：“光固化玻璃离子水门汀的修复和修复研究 - 特别是热循环对新旧修复体之间的粘合强度和弯曲强度的影响 -”日本保守牙科杂志 42・6。 (1999)