Evaluation Of Colour Stability, Gloss, Microhardness And Surface Roughness Between Microhybrid And Nano-Based Light Cured Composites In Different Ph Solutions

Jasin, Naziah Binti Md (2024) Evaluation Of Colour Stability, Gloss, Microhardness And Surface Roughness Between Microhybrid And Nano-Based Light Cured Composites In Different Ph Solutions. Masters thesis, Perpustakaan Hamzah Sendut.

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Abstract

Nanotechnology in dentistry is not something new. The application of nanotechnology provides many advantages and benefits especially in the production of high-quality restorative materials. Research and continuous improvement are conducted to ensure that the newly developed composite resins have superior characteristics that are resistant to mechanical challenges to remain and sustain in the oral environment for a lifetime. This study aims to evaluate the influence of various types of beverages that are widely used in malaysia on colour stability, surface gloss, microhardness, and surface roughness of contemporary composite resins. A total of 450 samples were fabricated from the three types of composites tested; filtektm 250; filtektm 250 xt; filtektm 350 xt (n=150). All samples were immersed in five immersion solutions consisting of distilled water, artificial saliva, soft drink, energy drink and instant black coffee for 100 days. Findings of this study was analysed using one-way anova and post-hoc test at significant level of p<0.05. The results of the study showed that all the composites immersed in various ph levels experienced a significant change in colour and gloss after the assessment periods of 24 hours, d10, d20, d30, d60 and d100 using a colorimeter and gloss meter. Evaluations of the microhardness level using vickers hardness test was performed at 24 hours, d30 and d100 found that nanofilled composites present a higher strength against mechanical stress compared to microhybrid composites.

Item Type: Thesis (Masters)
Subjects: R Medicine > R Medicine (General) > R5-920 Medicine (General)
Divisions: Institut Perubatan & Pergigian Termaju (Advanced Medical & Dental Institute (AMDI)) > Thesis
Depositing User: Mr Hasmizar Mansor
Date Deposited: 09 Mar 2026 01:49
Last Modified: 09 Mar 2026 01:49
URI: http://eprints.usm.my/id/eprint/63731

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