The total number of samples (45) were divided into three main groups cured according to three curing cycles (The standard short cycle, rapid was subdivided into three subgroup: The control group (without additives), samples prepared with the addition of Nigella Sativa , and samples prepared with the addition of Thyme oil. Color was measured for all the samples. Results were analyzed statistically by (Descriptive statistics, ANOVA and Duncan’s multiple range test) and showed that both additives(Nigella Sativa and Thyme oil) showed significant changes in the color of denture base. conclusion Both additives (Nigella sativa and Thyme oil) showed significant changes in the color of acrylic resin denture base material. The addition of Thyme oil to the samples cured by the regular heat curing cycle showed color change (ΔE=3.376) in relation to the standard (ADA) cycle which is an acceptable range in vitro.
This study were to evaluate the effect of Nigella sativa and Thyme oil on The color of Acrylic Resin Denture Base Material.
Table of Contents
1. Introduction
2. Materials and Methods
2.1. Color Test (by the use of VITA Easyshade)
3. Results
3.1. Color Change Test
3.1.1. By The Use of VITA Easyshade
3.1.2. Measuring Color Changes According to the (CIE L* a* b*) Color System
4. Discussion
4.1. Color Change
5. Conclusion
Research Objectives and Themes
The primary objective of this study is to evaluate the influence of adding Nigella sativa and Thyme oil as additives to acrylic resin denture base material on its color stability, comparing different curing cycles to determine clinically acceptable outcomes.
- Color stability assessment of denture base polymers
- Evaluation of medical plant extract additives
- Comparative analysis of heat curing cycles
- In vitro color measurement using VITA Easyshade
- Statistical analysis of lightness, chroma, and hue variations
Excerpt from the Book
Materials and Methods
The total number of samples (45), were prepared from vertex heat cured denture base resin material according to manufacturer's instructions powder/liquid mixing ratio (2/1) . Samples were divided into three main groups:
1.The first group (15 samples) cured according to the standard short cycle(2) at 74 °C for 90 minutes, then at 100 °C for 30 minutes (5 samples were the control prepared without additives, 5 samples prepared with the addition of Nigella Sativa oil and 5 samples prepared with the addition of Thyme oil).
2. The second group (15 samples) cured according to the standard rapid simplified manufacturer’s instruction curing cycle at 70 °C for 10 minutes, then at 100 °C for 20 minutes (5 samples were the control prepared without additives, 5 samples prepared with the addition of Nigella Sativa oil and 5 samples prepared with the addition of Thyme oil).
3. The third group (15 samples) cured according to the standard regular manufacturer’s instructions at 100 °C for 30 minutes (5 samples were the control prepared without additives, 5 samples prepared with the addition of Nigella Sativa oil and 5 samples prepared with the addition of Thyme oil).
Summary of Chapters
Introduction: This chapter highlights the increasing necessity for color-stable denture base materials and introduces the potential of Nigella sativa and Thyme oil as beneficial additives.
Materials and Methods: This section details the preparation of 45 acrylic samples using three distinct curing cycles and describes the calibration and application of the VITA Easyshade device for color testing.
Results: This chapter presents the statistical data derived from the color change tests, including lightness, chroma, and hue values across all groups and additive concentrations.
Discussion: This section interprets the findings, specifically focusing on the acceptable color change observed when Thyme oil is added to samples processed via the regular heat curing cycle.
Conclusion: This final section confirms that both additives induce significant color changes and identifies that the addition of Thyme oil in a regular curing cycle provides clinically acceptable in vitro results.
Keywords
Acrylic Resin, Denture Base, Nigella Sativa, Thyme Oil, Color Stability, VITA Easyshade, Curing Cycles, Polymethylmethacrylate, In Vitro, Lightness, Chroma, Hue, Dental Materials, Additives, Polymerization
Frequently Asked Questions
What is the core focus of this research?
The study investigates how the addition of Nigella sativa and Thyme oil to acrylic resin influences the color properties of denture bases across various manufacturing curing cycles.
What are the primary themes explored in the study?
The research explores dental material science, color stability criteria, the efficacy of herbal extracts in synthetic polymers, and the impact of different heat-polymerization protocols.
What is the main research question?
The study aims to determine whether the inclusion of these specific plant extracts maintains color stability within clinically acceptable limits for denture base materials.
Which scientific methodology is employed?
The researchers utilized a controlled in vitro experiment involving 45 samples, categorized by curing cycle and additive type, with precise measurements captured using the VITA Easyshade spectrophotometer.
What content is covered in the main body?
The main body covers the detailed sample preparation, the specific curing parameters, the technical calibration of measurement tools, and comprehensive statistical analysis tables.
Which keywords best characterize this work?
Key terms include Acrylic Resin, Denture Base, Nigella Sativa, Thyme Oil, Color Stability, and Curing Cycles.
Did the addition of Thyme oil yield positive results?
Yes, the addition of Thyme oil to samples cured via the standard regular heat curing cycle resulted in an acceptable color change (ΔE=3.376) according to in vitro standards.
How was the color change quantified?
Color change was calculated using the CIE L*a*b* color difference metrics, comparing the baseline values to the values measured after the curing and testing process.
- Quote paper
- Dr. Amer A. Taqa (Author), Nadira A. Hatim (Author), Saja Amjad Abdul Razzak (Author), 2012, Evaluate The Effect of Nigella Sativa and Thyme oil on the Color of Acrylic Resin Denture Base Material, Munich, GRIN Verlag, https://www.hausarbeiten.de/document/207697
