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Akarsu S, Atasoy S, Arıkan M, Koca B, Yiğin SN. Effects of three disinfection solutions on residual monomers released from resin nanoceramic CAD/CAM blocks. Heliyon 2024; 10:e24369. [PMID: 38317897 PMCID: PMC10838691 DOI: 10.1016/j.heliyon.2024.e24369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 02/07/2024] Open
Abstract
The aim of this study was to evaluate the effects of three disinfection solutions on the amount of monomers released from resin nanoceramic CAD/CAM blocks using high performance liquid chromatography (HPLC). Forty resin nanoceramic CAD/CAM (Cerasmart, GC, Japan) samples (12x14 × 2 mm) were divided into four groups; each group was disinfected using one of four solutions (Group 1: no disinfectant; Group 2: 70 % ethanol; Group 3: 2 % glutaraldehyde; and Group 4: 1 % sodium hypochlorite) for 5 min. Analysis of residual monomers (UDMA and Bis-EMA) amounts was performed using an HPLC instrument (Dionex Ultimate 3000, Thermo Fisher Scientific). After 30 days, the amounts of monomers found were as follows: 14.54 ppm for Group 1; 9.28 ppm for Group 2; 10.60 ppm for Group 3; and 2.76 ppm for Group 4 (the smallest monomer amount) (p < 0.001). Disinfection of indirect restorations prior to cementation can reduce the amount of residual monomers remaining from resin nanoceramic CAD/CAM blocks.
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Affiliation(s)
- Serdar Akarsu
- Ordu University, Faculty of Dentistry, Department of Restorative Dentistry, Turkey
| | - Samet Atasoy
- Ordu University, Faculty of Dentistry, Department of Restorative Dentistry, Turkey
| | - Merve Arıkan
- Ordu University, Faculty of Dentistry, Department of Restorative Dentistry, Turkey
| | - Bengisu Koca
- Ordu University, Faculty of Dentistry, Department of Restorative Dentistry, Turkey
| | - Sena Nur Yiğin
- Ordu University, Faculty of Dentistry, Department of Restorative Dentistry, Turkey
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Disinfectant effects of Brazilian green propolis alcohol solutions on the Staphylococcus aureus biofilm of maxillofacial prosthesis polymers. J Prosthet Dent 2022; 128:1405-1411. [PMID: 33992467 DOI: 10.1016/j.prosdent.2021.03.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 03/06/2021] [Accepted: 03/08/2021] [Indexed: 01/02/2023]
Abstract
STATEMENT OF PROBLEM Brazilian green propolis may be an alternative product that reduces the development of a microbial biofilm on the polymers used for maxillofacial prostheses. However, its effects as a disinfectant have not been fully established. PURPOSE The purpose of this in vitro study was to investigate the effects of Brazilian green propolis alcohol solutions against the Staphylococcus aureus biofilm on polymers used in maxillofacial prostheses, the maxillofacial silicone elastomer (MDX4-4210), and specific acrylic resins for ocular prostheses. MATERIAL AND METHODS A total of 324 disk-shaped specimens (3×10 mm) of each material were fabricated. All specimens were contaminated with S. aureus (108 cells/mL) to assess the antibiofilm activity of immersion solutions and protocols. Thus, 162 specimens of each material were randomly distributed and equally divided into 5 groups of disinfectants and 1 control group: 3 separate groups of 2.5%, 5%, and 10% propolis alcohol solutions, 1 group of 5% propolis alcohol gel, a positive control group of 2% chlorhexidine gluconate, and a negative control group of distilled water. Specimens (n=9) were disinfected by immersion for 5, 10, and 15 minutes and immersed in culture medium for 24 hours. Any notable turgescence in the final medium was considered indicative of a biofilm. The effects of disinfectants were analyzed by a turbidity assay and by scanning electron microscopy. Data were analyzed descriptively. RESULTS The final medium with specimens disinfected with 10% propolis alcohol solution showed no turbidity, indicating constant efficacy against the S. aureus biofilm. Similarly, these findings were observed in the 2% chlorhexidine gluconate group. Scanning electron microscopy images demonstrated that the surface of the polymers treated with 10% propolis alcohol solution did not show bacterial colonies. CONCLUSIONS Disinfection with 10% green propolis alcohol solution was effective in eliminating the S. aureus biofilm from specimens of maxillofacial elastomer and N1 acrylic resin specific to ocular prostheses by immersion for 5 minutes.
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The Inflammation Level and a Microbiological Analysis of the Anophthalmic Cavities of Unilateral Ocular Prosthesis Users: A Blind, Randomized Observational Study. Antibiotics (Basel) 2022; 11:antibiotics11111486. [PMID: 36358141 PMCID: PMC9686759 DOI: 10.3390/antibiotics11111486] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/13/2022] [Accepted: 10/24/2022] [Indexed: 11/16/2022] Open
Abstract
Irritation and biofilm adhesion are complaints associated with ocular prosthesis use. This study aimed to evaluate the effects of prosthesis repolishing on several conditions of anophthalmic volunteers. Participants were divided into two groups: intervention (IG, n = 10) and nonintervention (NIG, n = 6) groups. The anophthalmic cavity, contralateral eye, and prosthesis surface were evaluated at initial, day 15, and day 30 after repolishing. Microbiological analysis (colony-forming units), exfoliative cytology (conjunctiva inflammatory cells), sensory analysis (quantitative mechanical sensory test), tear production (Schirmer’s test), and conjunctival inflammation (clinical evaluation) were performed. Nonparametric tests were used to compare groups in the initial period and to analyze periods for the IG (p < 0.05). More microorganisms were formed in the anophthalmic socket and prosthesis than in the contralateral eye in the initial period. For IG, the anophthalmic cavity exhibited more microorganisms and inflammatory clinical signs in the initial period than at 15 and 30 after repolishing. The prosthesis showed greater accumulations of total bacteria and Candida albicans in the initial period than at 15 and 30 days after repolishing. The anophthalmic cavity had more palpebral inflammation than the contralateral eye. In conclusion, repolishing reduced the number of microorganisms and inflammatory signs over time.
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Rokaya D, Kritsana J, Amornvit P, Dhakal N, Khurshid Z, Zafar MS, Saonanon P. Magnification of Iris through Clear Acrylic Resin in Ocular Prosthesis. J Funct Biomater 2022; 13:jfb13010029. [PMID: 35323229 PMCID: PMC8952227 DOI: 10.3390/jfb13010029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 03/07/2022] [Accepted: 03/09/2022] [Indexed: 02/04/2023] Open
Abstract
The study on the magnification of the clear acrylic resin in prosthetic dentistry is important but lacking. Hence, this research aimed to investigate the magnification of the iris in the ocular prosthesis with various thicknesses of clear heat cure acrylic resin. A total of 60 ocular prostheses were divided into six groups with various thicknesses of clear heat cure acrylic resin over the iris; T0 (control): no acrylic resin, T1: 2, T2: 4, T3: 6, T4: 8, and T5: 10 mm of clear acrylic resin over the iris. Each ocular prosthesis was manufactured from white acrylic, with a 10.250 mm iris. Then, the clear heat cure resin was placed over the iris, cured, then polished. The final diameter of the iris was measured with a vernier caliper. The sizes of the iris were compared among various groups using one-way ANOVA, and a significant level was chosen at p value = 0.01. The mean sizes of iris were T0 = 10.25, T1 = 10.92, T2 = 11.26, T3 = 11.91, T4 = 12.75, and T5 = 13.43 mm. The size of the iris was significantly different among the group (p < 0.0001). The magnification of the iris for different groups was 1.06 for T1, 1.10 for T2, 1.16 for T3, 1.24 for T4, and 1.31 for T5. The magnification of the iris increased as the thickness of clear heat cure acrylic resin over the iris is increased on the ocular prosthesis.
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Affiliation(s)
- Dinesh Rokaya
- Department of Clinical Dentistry, Walailak University International College of Dentistry, Walailak University, Bangkok 10400, Thailand
- Correspondence:
| | - Jidapa Kritsana
- Oculoplastic and Reconstructive Surgery Unit, Department of Ophthalmology, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok 10330, Thailand; (J.K.); (P.S.)
| | | | - Nagendra Dhakal
- Department of Physics, University of Central Florida, Orlando, FL 32816, USA;
| | - Zohaib Khurshid
- Department of Prosthodontics and Implantology, College of Dentistry, King Faisal University, Al-Hofuf 31982, Al Ahsa, Saudi Arabia;
| | - Muhammad Sohail Zafar
- Department of Restorative Dentistry, College of Dentistry, Taibah University, Al Madinah 41311, Al Munawwarah, Saudi Arabia;
- Department of Dental Materials, Islamic International Dental College, Riphah International University, Islamabad 44000, Pakistan
| | - Preamjit Saonanon
- Oculoplastic and Reconstructive Surgery Unit, Department of Ophthalmology, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok 10330, Thailand; (J.K.); (P.S.)
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Moslehifard E, Ghaffari T, Zarei K, Karimoghli M. Evaluation of microhardness in two types of denture bases after using sodium hypochlorite and NatureDent disinfecting agents. J Dent Res Dent Clin Dent Prospects 2022; 16:196-203. [PMID: 36704187 PMCID: PMC9871170 DOI: 10.34172/joddd.2022.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 09/23/2022] [Indexed: 01/20/2023] Open
Abstract
Background. Chemical agents, in combination with mechanical methods, play an important role in reducing microbial plaque on denture surfaces. However, these methods might change the mechanical behavior of acrylic resins, including microhardness and surface roughness. This in vitro study investigated the effect of two disinfectants, i.e., water and sodium hypochlorite, on the microhardness of conventional heat-cured and TiO2 nanoparticle-reinforced acrylic resins. Methods. Sixty acrylic resin specimens were divided into two groups, and the samples in each group were randomly assigned to three subgroups (n=10). Heat-cured specimens and 1 wt% TiO2 acrylic resin were prepared and immersed in three solutions: water, a solution prepared with NatureDent pills, and 1% sodium hypochlorite for 30, 60, and 90 days. Microhardness tests were performed on each sample at each immersion stage. The data were analyzed using descriptive statistical methods, three-way and one-way ANOVA, repeated-measures t test, and Tukey HSD tests using SPSS 17. P values<0.05 were considered significant. Results. All three independent parameters, including resin, solution, and time, significantly affected microhardness (P<0.05). The microhardness of both specimen types, i.e., conventional heat-cured and TiO2 nanoparticle-reinforced acrylic resins, immersed for 30, 60, and 90 days, was the highest and lowest in water and hypochlorite solutions, respectively. Regarding 90 days, the microhardness values of conventional heat-cured and TiO2 nanoparticle-reinforced acrylic resins were 17.050±0.094 and 19.953±0.053 in water, 15.675±0.069 and 18.965±0.037 in hypochlorite, and 16.713±0.122 and 19.39±20.113 in NatureDent solutions, respectively. Conclusion. Disinfecting two types of acrylic resin specimens decreased their microhardness as a function of immersion time for up to 90 days in the three solutions. However, the magnitude of hardness lost was less for TiO2 nanoparticles-reinforced acrylic resin.
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Affiliation(s)
- Elnaz Moslehifard
- Department of Prosthodontics, Tabriz University of Medical Sciences, Tabriz, Iran,Corresponding author: Elnaz Moslehifard,
| | - Tahereh Ghaffari
- Department of Prosthodontics, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Khosro Zarei
- Department of Prosthodontics, Kurdistan University of Medical Sciences, Kurdistan, Iran
| | - Mahsa Karimoghli
- Department of Prosthodontics, Tabriz University of Medical Sciences, Tabriz, Iran
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Gonçalves NDL, Borges VM, de Arruda JAA, Dos Santos EG, Diniz IMA, Madeira MFM, Moreno A. Antimicrobial effects of photodynamic therapy on Staphylococcus aureus biofilm grown on a specific acrylic resin surface for ocular prostheses. Photodiagnosis Photodyn Ther 2020; 32:102042. [PMID: 33321571 DOI: 10.1016/j.pdpdt.2020.102042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 09/07/2020] [Accepted: 09/28/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND Photodynamic therapy (PDT) is a treatment for the specific control of oral biofilms. However, its effects on maxillofacial prostheses have been barely explored. In this study, we evaluated the antimicrobial effect of PDT using methylene blue (MB) and laser against a Staphylococcus aureus biofilm developed on the surface of scleral acrylic resin. METHODS Sixty-six specimens of acrylic resin designed for ocular prostheses were fabricated in a disk-shaped format (3 × 10 mm). S. aureus biofilm was grown on the surface of the specimens for 24 h and the disks were then treated with MB at different concentrations (25, 50, 75 or 100 μg/mL), with or without PDT (GaAlAs diode laser; 660 nm; 100 mW; 9 J; 321.4 J.cm-2; 3.5 W.cm-2 and 90 s). Control groups were treated with 2% chlorhexidine gluconate (CHX) or phosphate buffered saline. After the treatments, colony forming units (CFU) were counted and the samples were qualitatively evaluated by scanning electron microscopy (SEM). Data were analyzed descriptively and by nested ANOVA and the Tukey test (α = .05). RESULTS PDT groups with MB concentrations at 75 and 100 μg/mL formed fewer CFU compared to the other groups (P < 0.001) and the 2% CHX group did not form any CFU. SEM images revealed that the surface of the polymers in these groups did not show bacterial colonies. CONCLUSIONS PDT significantly reduced S. aureus biofilm in the scleral acrylic resin when associated with an MB dilution of 75 μg/mL or higher. Thus, PDT can be a promising candidate for disinfecting ocular prostheses.
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Affiliation(s)
- Nayane de Lanes Gonçalves
- Department of Oral Surgery, Pathology and Clinical Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Vinícius Martins Borges
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - José Alcides Almeida de Arruda
- Department of Oral Surgery, Pathology and Clinical Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Emerson Gomes Dos Santos
- Department of Business, Paulista School of Politics, Economics and Business, Universidade Federal de São Paulo, Osasco, SP, Brazil.
| | - Ivana Márcia Alves Diniz
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Mila Fernandes Moreira Madeira
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Amália Moreno
- Department of Oral Surgery, Pathology and Clinical Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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Moreno A, dos Santos DM, Lamartine de Moraes Melo Neto C, Luiz de Melo Moreno A, de Magalhães Bertoz AP, Goiato MC. In vitro evaluation of the effect of different disinfectants on the biofilm of Staphylococcus epidermidis and Staphylococcus aureus formed on acrylic ocular prostheses. PLoS One 2020; 15:e0240116. [PMID: 33044989 PMCID: PMC7549761 DOI: 10.1371/journal.pone.0240116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 09/21/2020] [Indexed: 11/19/2022] Open
Abstract
The aim of this study was to evaluate the effect of disinfectants on the biofilm of Staphylococcus aureus and Staphylococcus epidermidis formed on the acrylic surface of ocular prostheses. In this study, 396 acrylic specimens were manufactured (50% for Staphylococcus epidermidis, and 50% for Staphylococcus aureus). For each bacterium, 66 specimens were subjected to biofilm formation on their surfaces for 24 hours, 66 specimens were subjected to biofilm formation on their surfaces for 48 hours, and 66 specimens were subjected to biofilm formation on their surfaces for 72 hours. Then, they were divided into groups according to disinfection method (n = 6): sterile distilled water for 10, 15, 30 min, and 6 hours (control); soap for 30 min (NES30); Opti-Free for 30 min (OPF30) and 6 h (OPF6); Efferdent for 15 min (EFF15); and 0.5%, 2%, and 4% chlorhexidine for 10 min (0.5% CHX10, 2% CHX10, and 4% CHX10). After the treatments, the specimens were vortexed to release the biofilm and the counting of bacterial colonies was performed (CFU/mL). Three-way ANOVA and the Tukey-Kramer HSD test were used (α = 0.05). For Staphylococcus epidermidis, there was no significant difference between NES30, OPF30, and OPF6 with their respective control groups; nor between NES30, OPF30, and OPF6 themselves, regardless of the biofilm development period (P >0.05). For Staphylococcus aureus, there was no significant difference between NES30 and OPF30 with their control group; nor between NES30 and OPF30 themselves, regardless of the biofilm development period (P >0.05). For Staphylococcus aureus, OPF6 showed a significant reduction in the number of CFU/mL when compared with its control group, NES30, and OPF30, regardless of the biofilm development period (P <0.05). For both bacteria, 0.5% CHX10, 2% CHX10,4% CHX10, and EFF15 showed a significant reduction in the number of CFU/mL when compared with their control groups, NES30, OPF30, and OPF6, regardless of the biofilm development period (P <0.05). Therefore, EFF15 and CHX (0.5%, 2% and 4%) were effective in reducing Staphylococcus epidermidis and Staphylococcus aureus on acrylic surfaces. NES30 and OPF (30 and 6) are not recommended.
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Affiliation(s)
- Amália Moreno
- Department of Oral Surgery, Pathology and Clinical Dentistry, Federal University of Minas Gerais (UFMG), School of Dentistry, Belo Horizonte, Minas Gerais, Brazil
| | - Daniela Micheline dos Santos
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
- Oral Oncology Center, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | | | | | | | - Marcelo Coelho Goiato
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
- Oral Oncology Center, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
- * E-mail:
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Tuning of TiO2 nanoparticles incorporation in poly methyl methacrylate for synthesis of polymer nanocomposites for promising biomedical application. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.matpr.2020.05.202] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Nagay BE, Goiato MC, da Silva EVF, de Medeiros RA, Rangel EC, da Cruz NC, de Caxias FP, Dos Santos DM. Can Nonthermal Plasma Improve the Adhesion between Acrylic Resin for Ocular Prostheses and Silicone-Based Relining Material? J Prosthodont 2019; 28:692-700. [PMID: 31125155 DOI: 10.1111/jopr.13078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/14/2019] [Indexed: 10/26/2022] Open
Abstract
PURPOSE To investigate the influence of nonthermal plasma (NTP) treatment on the tensile bond strength between heat-polymerized acrylic resin for ocular prostheses and silicone reliner, with and without the use of an adhesive primer. MATERIALS AND METHODS One-hundred and sixty-four acrylic resin specimens were fabricated and randomly distributed into four groups according to the type of surface treatment: Sofreliner Primer, NTP, Sofreliner Primer + NTP, and NTP + Sofreliner Primer. Two specimens interposed with relining material (Sofreliner) formed one test sample to perform the tensile bond strength tests, before (initial) and after storage (final) in saline solution (37°C, 90 days, n = 10). Surface characterization was performed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The failure type was classified as cohesive, adhesive, or mixed. The data were analyzed statistically using the two-way ANOVA and Tukey test, as well as the chi-squared test (α = 0.05), Bonferroni correction (α = 0.005), and Spearman correlation coefficient (α = 0.05). RESULTS The SEM and EDS analyses showed the presence of a thin, homogenous organic film in the groups treated with NTP. The NTP + Sofreliner Primer group presented the largest bond strength mean values in the initial period (p < 0.05). Sofreliner Primer and NTP + Sofreliner Primer groups presented the first and second largest tensile bond strength mean values in the final period (p < 0.05), respectively. NTP + Sofreliner Primer group also had the largest number of cohesive (70%, initial) and mixed (90%, final) failures. CONCLUSIONS The NTP treatment performed before the primer application enhanced the bond between the acrylic resin ocular prosthesis and the Sofreliner silicone-based reliner, even after 90 days of immersion in saline solution.
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Affiliation(s)
- Bruna Egumi Nagay
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Marcelo Coelho Goiato
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Emily Vivianne Freitas da Silva
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, São Paulo State University (UNESP), Araçatuba, Brazil
| | | | - Elidiane Cipriano Rangel
- Technological Plasma Laboratory (LaPTec), Experimental Campus of Sorocaba, São Paulo State University (UNESP), Sorocaba, Brazil
| | - Nilson Cristino da Cruz
- Technological Plasma Laboratory (LaPTec), Experimental Campus of Sorocaba, São Paulo State University (UNESP), Sorocaba, Brazil
| | - Fernanda Pereira de Caxias
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Daniela Micheline Dos Santos
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, São Paulo State University (UNESP), Araçatuba, Brazil
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Nagay B, Goiato M, da Silva E, Andreotti A, Bitencourt S, Duque C, dos Santos P, dos Santos D. Effect of photopolymerized glaze application on bacterial adhesion on ocular acrylic resin surfaces submitted to accelerated ageing. Lett Appl Microbiol 2018; 68:120-127. [DOI: 10.1111/lam.13094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 10/09/2018] [Accepted: 11/01/2018] [Indexed: 11/28/2022]
Affiliation(s)
- B.E. Nagay
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
| | - M.C. Goiato
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
| | - E.V.F. da Silva
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
| | - A.M. Andreotti
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
| | - S.B. Bitencourt
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
| | - C. Duque
- Department of Pediatric Dentistry and Public Health; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
| | - P.H. dos Santos
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
| | - D.M. dos Santos
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School; São Paulo State University (UNESP); Aracatuba São Paulo Brazil
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Kati FA. Effect of Oil Paint Addition on Impact Strength of the Scleral Part of the Acrylic Ocular Prosthesis. Open Dent J 2018. [DOI: 10.2174/1874210601812010946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
For many dental and facial restorations, acrylic resins are the materials of choice because of their appropriate physical and mechanical properties. When making the ocular prosthesis from such materials, it is essential to add the perfect shade in order to match the colour of normal eye. This, however, might have a significant effect on the mechanical properties of acrylic resins.
Objective:
The purpose of this study was to assess the effect of adding the white oil paint (titanium dioxide) to clear acrylic resins on their impact strength.
Methods:
20 samples were constructed from heat cured acrylic resins, and divided into two groups (control and experimental) and each group had 10 samples. The first group was made from clear acrylic resin without the addition of white oil paints, and the second group (experimental) comprised the addition of 1 ml of the white oil paints to acrylic samples. Such samples were prepared with dimensions of (80 mm X10 mm X4 mm) length, width, and thickness, respectively. All the samples were tested by the Charpy's impact strength test. They were exposed to the load till the fracture occurred. All the values were analyzed using SPSS version 20, and the independent T-test was used for comparison between the 2 groups.
Results:
A statistically significant decrease (P-value < 0.001) was found in the impact strength of acrylic resins after the addition of titanium dioxide oil paints (experimental group: 5.97 + 1.11, control group: 9.42+1.32 KJ/M2).
Conclusion:
This study concluded that the addition of titanium dioxide oil paint significantly reduces the impact of strength of the acrylic resin. It is suggested to use different stains which will have no negative effect on impact strength of the acrylic resin.
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Surface characterization of polymers used in fabrication of interim prostheses after treatment with photopolymerized glaze. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:755-763. [DOI: 10.1016/j.msec.2016.10.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 10/23/2016] [Indexed: 11/18/2022]
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13
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In vitro analysis of different properties of acrylic resins for ocular prosthesis submitted to accelerated aging with or without photopolymerized glaze. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:995-1003. [DOI: 10.1016/j.msec.2016.07.081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/22/2016] [Accepted: 07/31/2016] [Indexed: 11/19/2022]
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Badaró MM, Salles MM, de Arruda CNF, Oliveira VDC, de Souza RF, Paranhos HFO, Silva-Lovato CH. In Vitro Analysis of Surface Roughness of Acrylic Resin Exposed to the Combined Hygiene Method of Brushing and Immersion in Ricinus communis and Sodium Hypochlorite. J Prosthodont 2016; 26:516-521. [PMID: 26833793 DOI: 10.1111/jopr.12436] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2015] [Indexed: 12/12/2022] Open
Abstract
PURPOSE To evaluate a solution based on Ricinus communis (Castor oil) for denture cleansing, comparing it to sodium hypochlorite (NaOCl) for the surface roughness of heat-polymerized acrylic resin. MATERIALS AND METHODS Forty polished and unpolished resin specimens (90 × 30 × 4 mm) were evaluated before and after their exposure to protocol hygiene: brushing the specimens with a specific denture brush and mild soap for 3 minutes, three times a day, and immersing them in hygiene solutions (0.25% NaOCl-S1 and 0.5% NaOCl-S2; 10% R. communis-S3; saline-S4: control) for 20 minutes. Surface roughness was evaluated by rugosimeter and scanning electron microscopy (SEM) before and after the protocol. For evaluation of surface roughness, polished and unpolished surfaces were used. RESULTS The roughness of the polished surface was not affected by time (p = 0.062), but was affected by solutions (p < 0.0001) and the interaction between factors (p = 0.005). For S1 and S4, the period did not influence the roughness. For S2, there was a change after 7 days, remaining stable after 14 days. For S3, there were changes, and stabilization occurred after 14 days. After 7 and 14 days, S2 and S3 promoted major changes, but after 21 days, there were no differences among solutions, except saline. The unpolished surface was not influenced by factors: period (p = 0.115), solution (p = 0.120), and their interaction (p = 0.382). SEM analysis showed similar results on the evaluation of surface roughness. CONCLUSIONS The polished surface of the prosthesis was more susceptible to changes when exposed to hygiene solutions, and although the 0.5% NaOCl solution promoted an increase in the surface roughness compared with the same solution at 0.25% and R. communis at 10%, the values are clinically acceptable.
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Affiliation(s)
| | - Marcela Moreira Salles
- School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | | | - Raphael Freitas de Souza
- School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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15
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Andreotti AM, Goiato MC, Moreno A, Nobrega AS, Pesqueira AA, dos Santos DM. Influence of nanoparticles on color stability, microhardness, and flexural strength of acrylic resins specific for ocular prosthesis. Int J Nanomedicine 2014; 9:5779-87. [PMID: 25525359 PMCID: PMC4266267 DOI: 10.2147/ijn.s71533] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The aim of this study was to assess the effect of adding nanoparticles to N1 acrylic resin intended for artificial sclera, in terms of the color stability, microhardness, and flexural strength of the resin. Three hundred samples of N1 acrylic resin were used: 100 samples for color stability and microhardness tests (each test was performed on the opposite side of each sample), and 200 samples for flexural strength testing (100 samples before and after 1,008 hours of accelerated aging). Samples for each test were separated into ten groups (n=10), ie, without nanoparticles (control group) or with nanoparticles of zinc oxide, titanium dioxide (TiO2), and barium sulfate at weight concentrations of 1%, 2%, and 2.5% (nanoparticle groups). Data were subjected to statistical analysis with nested analysis of variance and Tukey’s test (P<0.05 significance level). Among the nanoparticle groups, the TiO2 groups showed better color stability at all concentrations. Microhardness values increased after artificial aging, except for the control and zinc oxide groups. After aging, the 1%–2% TiO2 groups had significantly higher microhardness values compared with the other nanoparticle groups. Before aging, there was a significant difference in flexural strength between the control and nanoparticle groups. After aging, the control and TiO2 groups, regardless of concentration, showed the lowest flexural strength values. Incorporation of nanoparticles directly influenced the acrylic resin properties, with TiO2 being the most influential nanoparticle in terms of the evaluated properties.
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Affiliation(s)
| | | | - Amália Moreno
- Araçatuba Dental School, São Paulo State University, Araçatuba, São Paulo, Brazil
| | - Adhara Smith Nobrega
- Araçatuba Dental School, São Paulo State University, Araçatuba, São Paulo, Brazil
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16
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Goiato MC, dos Santos DM, Andreotti AM, Nobrega AS, Moreno A, Haddad MF, Pesqueira AA. Effect of Beverages and Mouthwashes on the Hardness of Polymers Used in Intraoral Prostheses. J Prosthodont 2014; 23:559-64. [DOI: 10.1111/jopr.12151] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/22/2013] [Indexed: 12/22/2022] Open
Affiliation(s)
- Marcelo Coelho Goiato
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Araçatuba; UNESP - Univ Estadual Paulista; Araçatuba Brazil
| | - Daniela Micheline dos Santos
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Araçatuba; UNESP - Univ Estadual Paulista; Araçatuba Brazil
| | - Agda Marobo Andreotti
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Araçatuba; UNESP - Univ Estadual Paulista; Araçatuba Brazil
| | - Adhara Smith Nobrega
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Araçatuba; UNESP - Univ Estadual Paulista; Araçatuba Brazil
| | - Amalia Moreno
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Araçatuba; UNESP - Univ Estadual Paulista; Araçatuba Brazil
| | - Marcela Filié Haddad
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Araçatuba; UNESP - Univ Estadual Paulista; Araçatuba Brazil
| | - Aldiéris Alves Pesqueira
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Araçatuba; UNESP - Univ Estadual Paulista; Araçatuba Brazil
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