scholarly journals Acrylic resin disinfection by peracetic acid and microwave energy

2015 ◽  
Vol 63 (3) ◽  
pp. 315-318 ◽  
Author(s):  
Carmen Beatriz Borges FORTES ◽  
Vicente Castelo Branco LEITUNE ◽  
Fabrício Mezzomo COLLARES ◽  
Nélio Bairros DORNELLES JUNIOR ◽  
Stéfani Becker RODRIGUES ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Microwave Irradiation ◽  
Incubation Period ◽  
Peracetic Acid ◽  
Acrylic Resin ◽  
Microwave Energy ◽  
The Other ◽  
Disinfection Methods ◽  
Acrylic Resins ◽  
Irradiation Power

Objective: The objective of this study was to evaluate the effectiveness of disinfection methods in microwave and immersion in peracetic acid in heat-cured, self-cured and microwave-cured acrylic resin, contaminated with Candida albicans. Methods: Five specimens were prepared for each type of acrylic resin. All were infected with Candida Albicans, incubated at 37°C for 24 hours. The group which underwent microwave energy was irradiated with a power of 840W for 1 minute and the other group underwent disinfection by soaking of 0.2% peracetic acid for 5 minutes. Results: All samples proved to be contaminated after the incubation period. After the different processes of disinfection, both immersion in 0.2% peracetic acid as microwave irradiation were effective in disinfection of the 3 types of acrylic resins contaminated by Candida Albicans. Conclusion: Concluded that soaking in 0,2% peracetic acid for 5 minutes with microwave irradiation power 840W for 1 minute are effective methods for disinfecting heat-cured acrylic resin, self-cured acrylic resin and microwave-cured acrylic resin, contaminated with Candida Albicans.

scholarly journals Nanopigmented Acrylic Resin Cured Indistinctively by Water Bath or Microwave Energy for Dentures

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
L. S. Acosta-Torres ◽  
M. C. Arenas ◽  
R. E. Nuñez­-Anita ◽  
F. H. Barceló-Santana ◽  
C. A. Álvarez-Gayosso ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Methyl Methacrylate ◽  
Acrylic Resin ◽  
Microwave Energy ◽  
Water Bath ◽  
Poly Methyl Methacrylate ◽  
Transverse Strength ◽  
Acrylic Resins

The highlight of this study was the synthesis of nanopigmented poly(methyl methacrylate) nanoparticles that were further processed using a water bath and/or microwave energy for dentures. The experimental acrylic resins were physicochemically characterized, and the adherence ofCandida albicansand biocompatibility were assessed. A nanopigmented acrylic resin cured by a water bath or by microwave energy was obtained. The acrylic specimens possess similar properties to commercial acrylic resins, but the transverse strength and porosity were slightly improved. The acrylic resins cured with microwave energy exhibited reducedC. albicansadherence. These results demonstrate an improved noncytotoxic material for the manufacturing of denture bases in dentistry.

scholarly journals Water sorption of heat-polymerized acrylic resins processed in mono and bimaxillary flasks

2006 ◽  
Vol 17 (2) ◽  
pp. 122-125 ◽  
Author(s):  
Carolina B. Meloto ◽  
Laís R. Silva-Concílio ◽  
Cristiane Machado ◽  
Margarete C. Ribeiro ◽  
Fábio A. Joia ◽  
...  
Keyword(s):  
Water Sorption ◽  
Acrylic Resin ◽  
Microwave Energy ◽  
Water Bath ◽  
Acrylic Resins ◽  
Energy Processing ◽  
Group 3 ◽  
Group 2 ◽  
Student’S T ◽  
Group 1

This study evaluated water sorption in heat-polymerized acrylic resins processed in monomaxillary flasks by water bath and in bimaxillary flasks by microwave energy and water bath. Fifty heat-polymerized acrylic resin specimens were fabricated according to the 12th specification of the American Dental Association and assigned to 3 groups: group 1 was processed by water bath in monomaxillary metallic flask; group 2 was processed by microwave energy in bimaxillary PVC flask; and group 3 was processed by water bath in bimaxillary metallic flask. Specimens were submitted to water sorption test, means were calculated and analyzed statistically by Student's t-test. Means (in g/cm³) were: group 1 - 0.024085, group 2 - 0.025312 and group 3 - 0.022098. Microwave energy processing and the amount of stone and resin used in the bimaxillary PVC flask did not influence water sorption; specimens processed in bimaxillary metallic flask by water bath presented lower water sorption means, suggesting an inadequate polymerization of the acrylic resin mass.

scholarly journals In Vivo and In Vitro evaluation of the efficacy of a peracetic acid-based disinfectant for decontamination of acrylic resins

2006 ◽  
Vol 17 (2) ◽  
pp. 117-121 ◽  
Author(s):  
Ana Lúcia Campani Chassot ◽  
Maria Inês Pereira Poisl ◽  
Susana Maria Werner Samuel
Keyword(s):  
Bacillus Subtilis ◽  
Peracetic Acid ◽  
Bacillus Stearothermophilus ◽  
Acrylic Resin ◽  
Human Saliva ◽  
Acrylic Resins ◽  
The Media ◽  
High Level

The purpose of this study was to assess the antimicrobial efficacy of a peracetic acid-based disinfectant for decontamination of heat-polymerized, chemically activated and microwave-polymerized acrylic resins. Resin plates were contaminated in vivo upon intraoral use by 10 volunteers for 7 nights and slabs were contaminated in vitro by contact with Bacillus subtilis and Bacillus stearothermophilus. The contaminated acrylic resin specimens were immersed in a 0.2% peracetic acid-based disinfectant (Sterilife®; Lifemed) for 5 min or 10 min and placed in a BHI culture medium. After incubation at 37°C for 48 h, bacterial growth was assessed by analyzing turbidity of the medium. For all types of acrylic resin, no turbidity of the medium was observed for any of the resin specimens immersed in the peracetic acid-based disinfectant for either 5 or 10 min. On the other hand, the media with specimens that were not immersed in the disinfectant (control) showed turbidity in 100% of the cases, indicating the presence of microorganisms in both tested conditions. In conclusion, immersion for at least 5 min in a 0.2% peracetic acid-based disinfectant promoted high-level disinfection of heat-polymerized, chemically activated and microwave-polymerized acrylic resins contaminated with either human saliva or Bacillus subtilis or Bacillus stearothermophilus.

scholarly journals Pengaruh Rebusan Minyak Atsiri Daun Sirih Merah (Piper Crocatum) sebagai Bahan Pembersih Gigi Tiruan Resin Akrilik terhadap Kekasaran Permukaan dan Perubahan Warna

2020 ◽  
Vol 17 (2) ◽  
pp. 50
Author(s):  
Rismawati Tri Kalasworojati ◽  
Ady Soesetijo ◽  
R. Rahardyan Parnaadji
Keyword(s):  
Surface Roughness ◽  
Essential Oils ◽  
Test Group ◽  
Acrylic Resin ◽  
The Other ◽  
Group Design ◽  
Betel Leaf ◽  
Acrylic Resins ◽  
Post Test ◽  
Dental Practices

Acrylic resins are frequently used as the basic materials of dentures in daily dental practices. Submersion of dentures in disinfectant is usually done by denture users to prevent plaque accumulation. Red betel leaf decoction and essential oils of red betel leaf 10% and 25% can be used as an alternative natural disinfectant contain polyphenols, because it can inhibit the growth of Candida albicans which is commonly found in prosthesis denture users. On the other hand, the polyphenols of red betle leaves was predicted can affect the roughness and discoloration of acrylic resin. The purpose of this study was to determine the differences in surface roughness and discoloration of heat cured acrylic resin submersed in decoction of red betel leaf and essential oil of red betel leaf 10% and 25%. This study was a laboratory experimental with pre and post test group design research.measuring surface roughness value with surface roughness TR 220 and discoloration value with color reader TCR 200. Conclusion: there is a difference in surface roughness and discoloration of acrylic resin that is submersed in decoction of red betel leaves and essential oils of red betel leaf 10% and 25%.

scholarly journals Evaluation and Comparison of the Effectiveness of Physical Methods of Disinfection on Heat-Polymerized Polymethyl Methacrylate – An In-vitro Study

2021 ◽  
pp. 285-293
Author(s):  
Kapil Soni ◽  
Vivek Choukse ◽  
Rajeev Shrivastava ◽  
Umesh Palekar ◽  
Prabha Shakya Newaskar ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Microwave Irradiation ◽  
Uv Radiation ◽  
Acrylic Resin ◽  
Positive Control ◽  
Mean Value ◽  
Control Group ◽  
Group A ◽  
The Mean ◽  
Group B

Introduction: The common relationship of Candida and the ample proof that acrylic resin dentures are related to denture stomatitis in the oral cavity, which can range from simple mucosal lesions to a fatal systemic form. The current study aims to assess and compare the efficacy of microwave irradiation and UV radiation in the disinfection of Candida albicans infection in heat-polymerized polymethyl methacrylate. Materials and Methods: A total of 90 specimens were prepared with heat-polymerized acrylic resin, out of which 30 were used for Microwave irradiation, and 30 were used for UV irradiation, and 30 were used for positive control. There were three groups: Group A (Positive Control group); Group B (Microwave irradiation); Group C (UV radiation). After preparing the samples they were chemically sterilized, then infected with C. Albicans, and again Group B is disinfected with Microwave irradiation, Group C is disinfected by UV light and Group A is kept as Positive control without disinfection. Turbidity was measured for each group after re-infection of every specimen in CFU/ml. Results: In the present study, the CFU/ml of Candida albicans in the control group was 2.97x107±0.6 x 107 (P= .000), for microwave irradiation, the mean value was 5.3±11.1 (P= .000), and for UV radiation, the mean value was 19.3±22.9 (P= .003). Conclusion: According to the results of the current study, microwave irradiation (6 minutes at 650W) is more effective than UV radiation (10 minutes each side at 254nm wavelength) of Candida albicans infection on the heat-polymerized acrylic resin in laboratory conditions.

scholarly journals In Vitro Antifungal Evaluation of Seven Different Disinfectants on Acrylic Resins

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
A. Z. Yildirim-Bicer ◽  
I. Peker ◽  
G. Akca ◽  
I. Celik
Keyword(s):  
Surface Roughness ◽  
Candida Albicans ◽  
Uv Light ◽  
Acrylic Resin ◽  
Cost Effective ◽  
Alternative Methods ◽  
Acrylic Resins ◽  
Significant Difference ◽  
White Vinegar

Objective. The aim of this study was to evaluate alternative methods for the disinfection of denture-based materials.Material and Methods. Two different denture-based materials were included in the study. Before microbial test, the surface roughness of the acrylic resins was evaluated. Then, the specimens were divided into 8 experimental groups(n=10), according to microorganism considered and disinfection methods used. The specimens were contaminated in vitro by standardized suspensions ofCandida albicansATCC#90028 andCandida albicansoral isolate. The following test agents were tested: sodium hypochlorite (NaOCl 1%), microwave (MW) energy, ultraviolet (UV) light, mouthwash containing propolis (MCP), Corega Tabs, 50% and 100% white vinegar. After the disinfection procedure, the number of remaining microbial cells was evaluated in CFU/mL. Kruskal-Wallis, ANOVA, and Dunn’s test were used for multiple comparisons. Mann WhitneyUtest was used to compare the surface roughness.Results. Statistically significant difference(P<0.05)was found between autopolymerised and heat-cured acrylic resins. The autopolymerised acrylic resin surfaces were rougher than surfaces of heat-cured acrylic resin. The most effective disinfection method was 100% white vinegar for tested microorganisms and both acrylic resins.Conclusion. This study showed that white vinegar 100% was the most effective method for tested microorganisms. This agent is cost-effective and easy to access and thus may be appropriate for household use.

scholarly journals Influence of storage period and effect of different brands of acrylic resin on the dimensional accuracy of the maxillary denture base

2008 ◽  
Vol 19 (3) ◽  
pp. 204-208 ◽  
Author(s):  
Ana Carolina Miéssi ◽  
Marcelo Coelho Goiato ◽  
Daniela Micheline dos Santos ◽  
Stefan Fiúza de Carvalho Dekon ◽  
Ricardo Coelho Okida
Keyword(s):  
Storage Period ◽  
Dimensional Accuracy ◽  
Acrylic Resin ◽  
Microwave Energy ◽  
Denture Base ◽  
Significance Level ◽  
Dimensional Changes ◽  
Acrylic Resins ◽  
Significant Difference ◽  
Hot Bath

The aim of this study was to evaluate the dimensional changes of denture bases made from different resins after different storage periods. For this purpose, 25 sets of plaster models/resin bases were prepared using 4 acrylic resins submitted to two types of polymerization: 1- QC-20 submitted to polymerization by microwave energy; 2- QC-20 submitted to polymerization by water hot bath; 3- Vipi Cril submitted to polymerization by water hot bath; 4- Vipi Wave submitted to polymerization by microwave energy; and 5- Onda Cryl submitted to polymerization by microwave energy. After polymerization, the specimens were sectioned for accuracy readings using a comparison microscope. Readings were taken at 3 points: the crests of the right (A) and left (B) ridges, and the median region of the palate, in 4 different periods. The data obtained were submitted to two-way ANOVA and Tukey's test at 5% significance level. The greatest distortions were found in the posterior palatal region of the base (M), with statistically significant difference (p<0.05) for the studied resins. All acrylic resins presented dimensional changes and the storage period influenced these alterations.

scholarly journals Evaluation of Different Polymerization Methods of Ocular Prosthesis Acrylic Resins on Subcutaneous Tissue Inflammatory Response in Rats

2021 ◽  
Author(s):  
Emily Da Silva ◽  
Marcelo C Goiato ◽  
Sandro Bitencourt ◽  
Daniela Dos Santos ◽  
Victor Brito ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Inflammatory Infiltrate ◽  
Subcutaneous Tissue ◽  
Chemical Activation ◽  
Immunohistochemical Analysis ◽  
Acrylic Resin ◽  
Microwave Energy ◽  
Ocular Prosthesis ◽  
Acrylic Resins ◽  
Tnf Α

Objectives: The aim of this study was to evaluate the influence of different polymerization methods of acrylic resin for ocular prostheses on the subcutaneous tissue inflammatory response of rats. Methods: Samples were prepared by: water bath (WB), microwave energy (MW), or autopolymerization (AP) (n=20/group). The inflammatory response (cell count and immunohistochemical analysis of IL-1β, IL-6, TNF-α, IL-17, and MIP-3α) was analyzed by the implantation of a sample from each group in the subcutaneous tissue of 20 Wistar rats, and evaluated after 7, 15, 30, and 60 days. Quantitative and qualitative data were submitted to ANOVA and Tukey test (p<0.05) and to visual comparison, respectively. Results: There was a moderate inflammatory infiltrate for MW and AP groups and a light infiltrate for the WB group after 7 days. The inflammatory infiltrate and the immunolabeling of tested targets decreased gradually during the 60 days. The AP group had the highest immunolabeling of TNF-α (7 days), IL-1β and IL-17 (15, 30 days), and IL-6 (30, 60 days). The WB and MW groups showed a greater immunolabeling at 15 and 30 days, while the MW group also had high results at 60 days. Conclusion: Polymerization by microwave energy and by chemical activation resulted in a higher inflammatory response. Keywords: Ocular Prosthesis, Acrylic Resins, Biocompatibility Testing

scholarly journals Comparison of Candida albicans colony amount in heat-cured acrylic and thermoplastic nylon resin after immersion in Ulee Kareng coffee (Coffea robusta)

2017 ◽  
Vol 29 (1) ◽  
Author(s):  
Iin Sundari ◽  
Ridha Andayani ◽  
Novriyanti Fatimah Harahap
Keyword(s):  
Candida Albicans ◽  
Base Material ◽  
Acrylic Resin ◽  
T Test ◽  
Test Results ◽  
Denture Base ◽  
Acrylic Resins ◽  
Experimental Laboratory ◽  
Coffea Robusta ◽  
Colony Counter

Introduction: Heat-cured acrylic resin is the most often used material in the manufacture of denture base. Along with the development of science and technology, to overcome the shortcomings of heat-cured acrylic resin, repairment of denture base material was done, one of them is a thermoplastic nylon resin. On the use of denture often found Candida albicans attached to the denture. This study aimed to determine the comparison of the amount of Candida albicans colony on heat-cured acrylic and thermoplastic nylon resin after immersed in the Ulee Kareng coffee (Coffea robusta). Methods: The number of specimens in this study were 8 specimens; 4 Meliodent® heat-cured acrylic resins and 4 Bio Tone® thermoplastic nylon resins with size of 10x10x2 mm. The methods of this study was experimental laboratory. The specimens were stored in a solution of Ulee Kareng coffee (Coffea robusta) for 7 days. Each specimen was contaminated with Candida albicans, then the number of Candida albicans colony was counted with Colony counter, from threshing results of heat-cured acrylic and thermoplastic nylon resins. Data were analyzed with unpaired t test. Results: Unpaired t test results showed that there were significant differences (p<0.05) between the number of colonies of Candida albicans in heat-cured acrylic resin (4.5 CFU/ml) and thermoplastic nylon resin (1.5 CFU/ml) after both immersed in the Ulee Kareng coffee (Coffea robusta). Conclusion: The amount of Candida albicans colony on heat-cured acrylic resin was higher than on thermoplastic nylon resin.

scholarly journals Rice vinegar removes Candida albicans from denture acrylic resins

2021 ◽  
Vol 76 (07) ◽  
pp. 409-413
Author(s):  
Tarana Garach ◽  
Sindisiwe Shangase ◽  
Mulalo Molaudzi ◽  
Julitha Molepo
Keyword(s):  
Candida Albicans ◽  
Low Cost ◽  
Acrylic Resin ◽  
White Wine ◽  
Denture Stomatitis ◽  
Significance Level ◽  
Apple Cider ◽  
Acrylic Resins ◽  
Post Test ◽  
Rice Vinegar

Denture stomatitis, mainly caused by Candida albicans, often affect denture wearers. To manage these patients, denture hygiene is of utmost importance. There is a need for low cost, easily accessible denture disinfectants. To investigate the efficacy of rice vinegar and other disinfecting solutions in removing C. albicans from acrylic resins. Hundred and eighty acrylic resin plates were contaminated with C. albicans strains and divided into five groups. These were immersed in apple cider vinegar (ACV), white wine vinegar (WWV), rice vinegar (RV), chlorhexidine (CHX), and sterile distilled H2O (control). The plates were incubated at room temperature for 30 minutes, 1 hour and 8 hours. Candida removing ability of the disinfecting solutions was evaluated, and data was analyzed using two-way ANOVAwith Tukey post-test. Significance level of p< 0.05 was used. RV, ACV, WWV and CHX showed the highest efficacy (100%) in removing both C. albicans strains at 8 hours (p>0.05). CHX was the most effective disinfectant in removing both C. albicans strains at 30 minutes, 1 hour, and 8 hours (99%-100%). RV was as effective as ACV, WWV and CHX in removing C. albicans from acrylic plates at 8 hours.

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