Aim: This study aims to measure the amount of fluoride release in deionized water from two composite resins materials (Kerr and Tetric ceram)over period of one month. By using different curing time for curing the composite.Materials and Methods : Two types of composite resin materials were used.
They are Tetric ceram and Kerr composite resins divided into five groups for each type of materials used, each group contain ten sample materials and cured with different time of curing which are (20,30,40,50,60) seconds.The samples measured fluoride release after storing in 5ml of deionized water then incubated incubator at 37°C for 24 hours.Results: The amount of fluoride release was affected by the period of curing time. The materials which cured at (20,30,40) seconds gave high amount of fluoride release while the materials which cured at (50,60)seconds gave low amount of fluoride release.
Conclusions: The amount of fluoride release from composite resins materials were affected by curing time. There is an increase in the amount of fluoride release by decreasing the period of curing time and decreasing by increasing the period of curing time.
Table of Contents
1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Conclusion
Research Objectives and Themes
The primary objective of this study is to investigate the influence of varying curing times on the amount of fluoride release from two specific types of composite resin materials (Kerr and Tetric ceram) over a storage period of one month in deionized water.
- Measurement of fluoride ion release from dental restorative materials.
- Evaluation of the impact of light-curing duration on polymer matrix conversion.
- Comparative analysis of Tetric ceram and Kerr composite resin behaviors.
- Assessment of the relationship between curing time and the resulting material hardness and structural integrity.
Excerpt from the Publication
DISCUSSION
The amount of fluoride released from the composite resin as F, AlF6 or as fluoro phosphate compounds principally jeriring from glass particles that had no reaction at mixture time(16).
In Addition to the fluoride containing glass fillers compound embedded in to the matrix may also due to the presence of fluoride from YF3 (Ytterebum fluoride)(17).
In this study by the use of low curing time (20,30,40) seconds will lead to increase of the amount of fluoride release while when increasing in the period of curing time (50,60)seconds there was a decrease in the amount of fluoride release. This is due to the increase of the degree of conversion of C=C double bond to CC a single bond and leading to cohesion of the polymer net works which reduce the frontal mobility of carboxyl groups. This will lead to obstruction of the amount of the fluoride released from the materials at the high degree of curing time (50 and 60) seconds (18).
Summary of Chapters
Introduction: Provides the scientific background on the cariostatic properties of fluoride and the role of composite resins in modern restorative dentistry.
Materials and Methods: Details the experimental setup, including sample preparation of Tetric ceram and Kerr resins, curing protocols, and the analytical measurement of fluoride release using ion-specific electrodes.
Results: Presents the measured fluoride release data through tables and calibration curves, confirming significant differences in fluoride release among groups with varying curing times.
Discussion: Interprets the findings by linking the polymer degree of conversion and the mobility of carboxyl groups to the observed changes in fluoride release based on curing duration.
Conclusion: Summarizes that shorter curing times (20, 30, 40 seconds) result in higher fluoride release, whereas longer curing times (50, 60 seconds) lead to reduced fluoride release.
Keywords
Curing time, Fluoride release, Composite resin, Dental restorative materials, Tetric ceram, Kerr composite, Polymerization, Ion-specific electrode, Cariostatic agent, Degree of conversion, Restorative dentistry.
Frequently Asked Questions
What is the primary focus of this study?
The study focuses on how different durations of light-curing affect the release of fluoride ions from two commercially available composite resin materials.
What are the central themes discussed in the paper?
The themes include the chemical properties of dental composites, the mechanism of fluoride release, the importance of curing time in resin polymerization, and the structural impact on filler particle mobility.
What is the core research question?
The research question asks whether varying the curing time (20, 30, 40, 50, and 60 seconds) significantly changes the amount of fluoride released from Tetric ceram and Kerr composite resins.
Which scientific methodology was employed?
The researchers utilized an experimental design involving 50 disk samples per material type, which were light-cured, stored in deionized water, and measured using an ion-specific electrode and calibration curves.
What does the main body of the paper cover?
The main body covers the theoretical background of dental materials, the standardized experimental procedures, statistical analysis of fluoride release, and an interpretation of how polymer structure affects ion diffusion.
Which keywords best characterize this research?
Key terms include Curing time, Fluoride release, Composite resin, Polymerization, and Cariostatic agent.
Why does longer curing time result in lower fluoride release?
Longer curing times lead to a higher degree of conversion of C=C bonds into a denser polymer network, which limits the mobility of carboxyl groups and obstructs the release of fluoride from the fillers.
Is there a significant difference between the two materials tested?
The study focuses on the effects observed within both material types, noting that both exhibit an inverse relationship between curing duration and fluoride release.
- Quote paper
- Amer Taqa (Author), Manal A. Sultan (Author), 2008, The Effect of Curing Time on Fluoride, Munich, GRIN Verlag, https://www.grin.com/document/209001
