scholarly journals Effect of Phosphoric Containing and Varnish-Coated Groups on Candida Albicans Adhesion and Porosity of Heat Cure Acrylic Denture Base Material

2018 ◽  
Vol 11 (1) ◽  
pp. 179-185 ◽  
Author(s):  
Zahraa S. Abed Karkosh ◽  
Basima M. A. Hussein ◽  
Wifaq M. Ali AL-Wattar
Keyword(s):  
Candida Albicans ◽  
Polymethyl Methacrylate ◽  
Base Material ◽  
Acrylic Resin ◽  
Denture Base ◽  
Heat Cure ◽  
Varnish Layer ◽  
Varnish Coating ◽  
Methacrylate Monomer ◽  
Experimental Group

The aim of this study was to evaluate the effect of modified heat cured polymethyl methacrylate denture base (PMMA) or varnish coating of the denture base on candida albicans adhesion and porosity. First experimental group was prepared by addition of 15% phosphoric acid 2-hydroxyethyl methacrylate ester with polymethyl methacrylate monomer. While second experimental group prepared by varnish layer coating after material processing, these groups were compared with the control one. Three groups of vertex acrylic resin used as control, mPMMA and varnish coated group (PPH Cerkamed Wojciech Pawlowski, Poland). The inverted light microscope was used to measure the candida albicans adherence after one week and one month of processing. Two-way ANOVA, LSD test, T- test and Dunnett T3 were performed on data. Modified Acrylic resin showed highly significant reduction in candida albicans adhesion and porosity, also for varnish coating group showed highly significant reduction in candida albicans adhesion and porosity test.

scholarly journals Enhancement of the Tensile and the Compression Properties for Heat- Cured Acrylic Resin Denture Base Materials

2018 ◽  
Vol 15 (4) ◽  
pp. 449-454
Author(s):  
Baghdad Science Journal
Keyword(s):  
Polymethyl Methacrylate ◽  
Compression Strength ◽  
Base Material ◽  
Acrylic Resin ◽  
Tensile Tests ◽  
Strength Test ◽  
Denture Base ◽  
Compression Properties ◽  
Base Materials ◽  
Styrene Butadiene

This work aims to investigate the tensile and compression strengths of heat- cured acrylic resin denture base material by adding styrene-butadiene (S- B) to polymethyl methacrylate (PMMA). The most well- known issue in prosthodontic practice is fracture of a denture base. All samples were a blend of (90%, 80%) PMMA and (10%, 20%) S- B powder melted in Oxolane (Tetra hydro furan). These samples were chopped down into specimens of dimensions 100x10x2.5mm to carry out the requirements of tensile tests. The compression strength test specimens were shaped into a cylinder with dimensions of 12.7mm in diameter and 20mm in length. The experimental results show a significant increase in both tensile and compression strengths when compared to control (standard) results for the preparation material.

scholarly journals The Comparison of Retention between Hot Curing and Fluid Denture Base Acrylic Resin (In Vivo)

2018 ◽  
Vol 2 (2) ◽  
pp. 150-161
Author(s):  
Bestun Akram ◽  
Rizgar Hasan
Keyword(s):  
Base Material ◽  
Acrylic Resin ◽  
Basic Requirement ◽  
Denture Base ◽  
Measuring Device ◽  
Base Materials ◽  
Heat Cure ◽  
Male Patients

Adequate retention is a basic requirement for the acceptance of complete denture. The aim of this study was to evaluate the retention quality of fluid denture base materials and compare it with conventional acrylic denture base materials Method: Sixteen edentulous male patients with an age 45-60 years participated in the study. For each patient two denture bases were constructed, one of them made from fluid denture base materials and the other made from hot acrylic denture base materials. A specially designed strain gauge measuring device was used to measure the force required to dislodge the two dentures from basal seats. Six measurements of retention of newly inserted denture base were recorded for each patient (three for maxillary acrylic denture base and three for maxillary fluid denture base). Results: The results of the retention test showed that the fluid denture base materials required more force in order to dislodge denture than the heat cure denture base materials, which means a significant improvement in retention quality obtained by fluid denture base materials. Conclusions: It has appeared that the fluid acrylic denture base materials produce denture base material with excellent retentive efficiency to the underlying tissue when compared to conventional denture base materials.

scholarly journals Influence of Different Reline Materials and Processing Methods on Flexural Strength of Denture Base Material

2021 ◽  
Vol 25 (2) ◽  
pp. 108-113
Author(s):  
Ozlem Gurbuz Oflezer ◽  
Hakan Bahadır ◽  
Senem Ünver ◽  
Ceyhan Oflezer
Keyword(s):  
Flexural Strength ◽  
Base Material ◽  
Acrylic Resin ◽  
Bending Test ◽  
Control Group ◽  
Processing Methods ◽  
Denture Base ◽  
Three Point Bending ◽  
Heat Cure ◽  
And Control

Summary Background/Aim: Relining is defined as the procedure used to resurface the tissue side of a denture with new base material, thus producing an accurate adaptation is provided at the denture foundation area. During mastication, relined dentures have to withstand masticatory forces to prevent fracture. The aim of this study was to evaluate the flexural strength of acrylic resin denture base relined with different methods and materials. Material and Methods: Fourteen experimental groups and one control group were determined to consider different reline materials and processing methods. Acrylic resin specimens were prepared with the dimensions of 65× 10× 1.5 mm and reline materials (1.5 mm thickness) were placed on acrylic resins. Reline material was not used in control group specimens. Flexural strength values of relined and control specimens were measured with three-point bending test at a speed of 5 mm/min. Data were analyzed with using one way Anova and Student t tests. Results: The highest flexural strength values were shown in control group (86.51±1.08 MPa). There were significant differences among relined specimens (p< 0.05). For the relined specimens, the highest flexural strength values were found in the relined specimens with denture base material (77.90±1.93 MPa), and the lowest values were found in relined with autopolymerize acrylic material (59.81±1.50 MPa). Conclusions: Relining of the heat cure denture base material significantly decreases the flexural strength for all processing methods and materials.

Effect of phosphate ester addition on transverse strength and hardness of heat cured acrylic denture base material

2018 ◽  
Vol 30 (2) ◽  
pp. 5-9
Author(s):  
Zahraa S. Abed karkosh ◽  
Basima M.A. Hussien
Keyword(s):  
Polymethyl Methacrylate ◽  
Testing Machine ◽  
Base Material ◽  
Hardness Test ◽  
Acrylic Resin ◽  
Control Group ◽  
Phosphate Ester ◽  
Denture Base ◽  
Hardness Tester ◽  
Transverse Strength

Background: acrylic resin denture base consider a common denture base material for its acceptable cost, aesthetic and easy processing but still has disadvantages including easy of fracture and low impact strength. Material and method: The experimental group was prepared by addition of 15% phosphoric acid 2-hydroxyethyl methacrylate ester (PA2HEME) with polymethyl methacrylate monomer; the experimental groups was compared with the control one. The specimens were prepared according to ADA specification No. 12 with dimension 65 mm x 10 mm x2.5 mm (length x width x thickness respectively). The prepared specimens were tested by three-point flexural strength utilizing Instron Universal Testing Machine (WDW, Layree Technology Co.), Shore D hardness tester used to measure hardness test. Statistical analysis used student T- test, mean and standard deviation. Results: The result of PA2HEME group showed high significant reduction comparing to the control group for both transverse strength and hardness test. Conclusion: Mixing 15% of PA2HEME with 85% methyl methacrylate (MMA) can reduce the mechanical properties of new modified polymethyl methacrylate (PMMA) acrylic resin.

The effects of silane-SiO2 nanocomposite films on Candida albicans adhesion and the surface and physical properties of acrylic resin denture base material

2014 ◽  
Vol 112 (6) ◽  
pp. 1530-1538 ◽  
Author(s):  
Sirasa Yodmongkol ◽  
Rojcharin Chantarachindawong ◽  
Sroisiri Thaweboon ◽  
Boonyanit Thaweboon ◽  
Taweechai Amornsakchai ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Physical Properties ◽  
Base Material ◽  
Acrylic Resin ◽  
Nanocomposite Films ◽  
Denture Base

scholarly journals Disinfection Effect of 10% Ricinus Communis Oil on Candida Albicans Counts of Heat Polymerized Acrylic Resin

2021 ◽  
Vol 24 (1) ◽  
pp. 6-10
Author(s):  
Putri Welda Utami ◽  
Nurdiana
Keyword(s):  
Candida Albicans ◽  
Ricinus Communis ◽  
Base Material ◽  
Acrylic Resin ◽  
Biological Properties ◽  
Chlorhexidine Gluconate ◽  
P Value ◽  
Denture Base ◽  
Post Test ◽  
Experimental Laboratory

Dentures is used to replace tooth loss. The most used denture base material is acrylic resin. The biological properties of acrylic resins give microorganisms the ability to colonize. Certain type of microorganism often found at the dentures base is Candida albicans. Denture’s disinfection is usually used to reduce Candida albicans. One of natural source that now is being widely researched is Ricinus communis oil. The purpose of this study was to analyze disinfection effect of Ricinus communis oil 10% on Candida albicans counts on heat polymerized acrylic resin. This research is an experimental laboratory study with a post-test only design. Samples was heat polymerization acrylic resin plates measuring 10 x 10 x 1 mm were made in the Department of Prosthodontic Faculty of Dentistry, Universitas Sumatera Utara with 10 plates for each for 10% Ricinus communis oil group and 0.2% chlorhexidine gluconate group (control). The Candida albicans colonies count was carried out in the Microbiology Laboratory, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara using colony counter. The data obtained was statistically count with the Kruskal-Wallis Test. The result showed the decrease in Candida albicans count with the highest value in the 10% Ricinus communis oil group is 9 x 100 CFU/ml and the highest value in the 0.2% chlorhexidine gluconate group is 0 x 100 CFU/ml. The Kruskal-Wallis test showed significant results with p value of 0.0001 (p <0.05) indicating there was a disinfection effect of 10% Ricinus communis oil and 0.2% chlorhexidine gluconate on Candida albicans count of heat polymerized acrylic resin. The study concluded that 10% Ricinus communis oil effective at decreasing Candida albicans count.

scholarly journals The effect of submersion denture base acrylic resin in a betel leaf ekstract solution against growth candida albicans

2017 ◽  
Vol 2 (3) ◽  
pp. 183
Author(s):  
Ardiansyah S. Pawinru ◽  
Andi Izham
Keyword(s):  
Candida Albicans ◽  
Oral Cavity ◽  
Leaf Extract ◽  
Longitudinal Design ◽  
Base Material ◽  
Acrylic Resin ◽  
Denture Base ◽  
Denture Stomatitis ◽  
Betel Leaf ◽  
Experimental Laboratory

Objective: Microorganisms are often found in the oral cavity is candida albicans approximately 40 % in the oral cavity. Candida albicans can penetrate the acrylic resin that can infect the soft tissue and is the cause of denture stomatitis therefore the disinfection pf denture base is an important factor that must be done. The purpose of the research is to determine how the effect of submersion denture base acrylic resin in a betel leaf exstract solution against growth candida albicans.Material and Methods: This research is an experimental laboratory with a longitudinal design (follow-up) study. The Sampling method used is Total Sampling. This study used a sample of 12 pieces of denture base material acrylic resin to be suspended candida albicans fungus for 1x24 hours at 37oC.Results: The number of candida albicans colonies n denture base acrylic resin which soaked betel leaf extract solution that the dilution 10-1with consentration 2.5% total colony count is 2 and the results 2.0 x 101 CFU/ml , on a control solution that the dilution 10-2 total colony 355 and the result 3.55x104 CFU/ml , that the dilution  10-3 total colony 62 and the result 6.2x104 CFU/ml.Conclusion: Betel leaf extract (piper linn) can inhibit the growth of candida albicans on denture base of acrylic resin, betel leaf extract (piper linn) 5% is a minimal anti-fungal power that can be used as a disinfectant solution in acrylic resin denture.

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