Aims: To evaluate the effect of two prepared and commercial solution on surface roughness and tensile strength of highly impact acrylic denture base material Materials and Methods: The total number of specimens were one hundred and fifty. They were prepared from highly impact acrylic and subdivided into five groups for each solution (EDTA, Soda+H2O2, Lacalut, Corega and distilled water). Two laboratory tests were used for this research. Surface Roughness and tensile strength test. The surface roughness test specimens were constructed with dimensions (10×10×2±0.03mm) (length, width, and thickness respectively). According to ADA specification no.12 the tensile test specimens were constructed with dimensions 90×10×3±0.03mm (length, width, and thickness respectively). The immersion periods in this research are (2 day, 7 day and one month). ANOVA and Duncan multiple range test were used. The statistical results were considered significant at p ≤ 0.05. Results: the results showed that (soda+H2O2) has no significant change on the surface roughness and tensile strength of highly impact acrylic denture base material in (2d ay, 7 day, and 1 month) conclusion: (soda+H2O2) has the lowest effect on the surface roughness and tensile strength of highly impact acrylic denture base material in (2 day, 7 day, and 1 month)
Key words: denture cleanser, highly impact, lacalut
Table of Contents
Introduction
Materials and Methods
Results
Tensile Strength
Surface Roughness
Discussion
Conclusion
Objectives & Topics
The primary aim of this research is to evaluate the influence of two experimental and two commercial cleansing solutions on the surface roughness and tensile strength of highly impact acrylic denture base materials over different immersion periods.
- Evaluation of denture base material integrity under chemical stress.
- Comparative analysis of experimental solutions (EDTA, Soda+H2O2) vs. commercial products (Corega, Lacalut).
- Assessment of mechanical property degradation (tensile strength) over 2-day, 7-day, and 1-month periods.
- Analysis of surface roughness (Ra) changes following immersion in various cleansers.
- Determination of a safe, effective denture cleanser that does not compromise material durability.
Excerpt from the Book
Materials and Methods
The total number of specimens was one hundred and fifty. Seventy five for each test were prepared from highly impact acrylic and subdivided into five groups for each solution. The immersion periods in this study are (2day, 7 day and one month)
Highly impact acrylic (vertex-dental) used in this research mixed according to the manufacture instruction. The liquid powder ratio is 1 ml liquid and 1.2 mg powder, adding powder to the liquid and then mixing the powder to liquid for 30 min , leave the mixing for 8 min in room temperature 22 °C until reach to the dough stage adding the highly impact acrylic to the flask through in room temperature 22 °C and then press the flask by press , and putting immediately inside hot water approximately 70°C for 90 min and then rising the degree of temperature to the 100 °C for 30 min and the remove the flask and leave it to cool. Two laboratory tests were used for this research. tensile strength and Surface roughness test, According to ADA specification no.12 the tensile test specimens were constructed with dimensions 90×10×3±0.03mm (length, width, and thickness respectively) Then universal testing machine (Gunt, Germany) was used to measure the tensile strength of specimens The force at failure was recorded in Newton (N) and the true tensile strength value was calculated by the following formula: Tensile strength = F(N)/A (mm2) (16) . The surface roughness test specimens were constructed with dimensions (10×10×2±0.03mm) (length, width, and thickness respectively) The surface roughness (Ra) values were measured using a profilometer (Stylus 10 UK) which can measure small surface variations by moving a diamond stylus in contact with the surface.(17). The specimens were fabricated by using Type III model dental stone (Zhermack SPA Rovigo, Italy) as a mold. This study deals with five solutions (table 1).two experimental prepared solutions, solution one
Summary of Chapters
Introduction: Provides the historical context of PMMA usage in dentistry and discusses the inherent challenges regarding mechanical strength and the impact of various cleaning agents on denture materials.
Materials and Methods: Details the preparation of acrylic specimens, the composition of the five testing solutions, and the specific laboratory protocols used for tensile strength and surface roughness testing.
Results: Presents the statistical data from the ANOVA and Duncan multiple range tests, comparing the effects of different solutions on tensile strength and surface roughness across specified time intervals.
Discussion: Interprets the findings by analyzing how the chemical components of the cleansers, such as CO2 or O2 release, interact with and affect the physical properties of the acrylic resin.
Conclusion: Summarizes that Soda+H2O2 demonstrated no significant negative impact on the material properties, suggesting it as a potentially safer alternative for patient use compared to others.
Keywords
denture cleanser, highly impact, lacalut, acrylic resin, surface roughness, tensile strength, PMMA, immersion periods, EDTA, Soda+H2O2, Corega, material integrity, dental prosthetics, mechanical properties, chemical disinfection
Frequently Asked Questions
What is the core focus of this research paper?
The paper examines how different denture cleansing solutions affect the structural integrity, specifically the tensile strength and surface roughness, of high-impact acrylic denture base materials over time.
Which cleansing solutions were tested in this study?
The study compared two experimental solutions (EDTA and a Soda+H2O2 mixture) against two commercial products (Corega and Lacalut) and distilled water as a control.
What is the primary research objective?
The objective is to identify a cleansing method that maintains the mechanical properties of denture bases while ensuring the cleanser is non-deleterious and safe for long-term patient use.
What methodology was employed to test the specimens?
The researchers used tensile strength testing via a universal testing machine and surface roughness analysis using a profilometer, evaluated with statistical methods like ANOVA and Duncan's multiple range test.
What does the main body of the work cover?
It covers the experimental setup, material preparation according to manufacturer instructions, detailed immersion protocols, and statistical analysis of results obtained after 2 days, 7 days, and 1 month.
Which keywords best characterize this work?
The research is characterized by terms such as denture cleanser, high-impact acrylic, tensile strength, surface roughness, and chemical immersion effects.
Why was Soda+H2O2 highlighted in the conclusion?
The study concluded that the Soda+H2O2 solution had the lowest impact on the surface roughness and tensile strength of the acrylic material throughout the entire testing duration, indicating higher material safety.
How did immersion time influence the results?
The study found significant differences in surface roughness over time, whereas there was no significant difference in tensile strength for the solutions after a one-month immersion period.
- Citation du texte
- Amer Taqa (Auteur), 2012, The Effect of Newly Prepared Cleansing Agent on The Surface Roughness and Tensile Strength of Highly Impact Acrylic Denture Base Material, Munich, GRIN Verlag, https://www.grin.com/document/210058
