ABSTRACT

The aim of this study is to examine the effect of chlorhexidine (CHX), ozone and photodynamic (PDT) therapy on the microleakage of reinforced glass ionomer cement and on tooth discoloration. The class V cavities were opened on the buccal faces of 96 extracted molar teeth and the samples were divided into four groups (n = 24). Before and after cavity disinfection, color measurement of teeth was determined by using a spectrophotometer. The groups were separated into two subgroups and restored with ACTIVA and Giomer. One thousand thermal cycles were applied to the teeth at 5–55 C. After the penetration of 0.5% basic fuchsin, teeth were examined with a stereomicroscope and SEM. The data were statistically analyzed using the Mann Whitney U-test and the Kruskal Wallis test. The differences were statistically significant among the cavity disinfectants on the occlusal edge in the ACTIVA groups (p < .05), There was no significant difference considering cavity disinfectants on occlusal and gingival margins in the Giomer groups (p > .05). While ozone gas showed an acceptable color change in teeth, CHX and PDT caused the discoloration in teeth. It was concluded that the Ozone gas does not affect the microleakage of the reinforced glass ionomer cements and does not cause detectable color change. CHX and PDT reduce the microleakage of ACTIVA at the enamel level.

摘要

本研究的目的是检查氯己定 (CHX)、臭氧和光动力 (PDT) 治疗对增强玻璃离子粘固剂微渗漏和牙齿变色的影响。在 96 颗拔除臼齿的颊面上开出 V 类蛀牙，将样品分为四组（n = 24）。在腔体消毒前后，使用分光光度计测定牙齿的颜色。这些组被分成两个亚组，并用 ACTIVA 和 Giomer 恢复。在 5-55°C 下对牙齿施加一千次热循环。在渗透 0.5% 碱性品红后，用立体显微镜和 SEM 对牙齿进行检查。使用 Mann Whitney U 检验和 Kruskal Wallis 检验对数据进行统计分析。p < .05)，Giomer 组在咬合和牙龈边缘使用蛀牙消毒剂没有显着差异 ( p > .05)。虽然臭氧气体在牙齿中显示出可接受的颜色变化，但 CHX 和 PDT 导致牙齿变色。得出的结论是，臭氧气体不会影响增强玻璃离子水门汀的微渗漏，并且不会引起可检测的颜色变化。CHX 和 PDT 可减少 ACTIVA 在牙釉质水平的微渗漏。