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Tsujimura Y, Fukuyama T, Hamano N, Iwashita H, Watanabe M, Ino S. The stain resistant effect of an ultraviolet curable coating material on denture base resin. Dent Mater J 2023; 42:266-272. [PMID: 36624074 DOI: 10.4012/dmj.2022-148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This study aimed to evaluate the effects of an ultraviolet (UV) curable coating material on denture base resin. The results of the three-point bending test showed no significant difference between treated and untreated specimens, suggesting that the UV curable coating material did not compromise the physical strength of denture base resin. The surface free energy measurement and the surface analysis with atomic force microscopy revealed superhydrophilicity and a regularly arranged structure on the coating surface, improving wettability. Moreover, untreated specimens were significantly discolored in the staining test. However, specimens treated with the UV curable coating material showed no significant difference in color with slight staining, suggesting excellent antifouling ability. Therefore, the UV curable coating material used in this study could contribute to simplifying hygiene without altering the physical properties of denture base resins.
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Affiliation(s)
- Yuya Tsujimura
- Department of Removable Prosthodontics, Graduate School of Dentistry, Kanagawa Dental University
| | - Takushi Fukuyama
- Department of Removable Prosthodontics, Graduate School of Dentistry, Kanagawa Dental University
| | - Naho Hamano
- Department of Removable Prosthodontics, Graduate School of Dentistry, Kanagawa Dental University
| | - Hideo Iwashita
- Department of Removable Prosthodontics, Graduate School of Dentistry, Kanagawa Dental University
| | - Mitsuhiro Watanabe
- Material & Surface Engineering Research Institute, Kanto Gakuin University
| | - Satoshi Ino
- Department of Removable Prosthodontics, Graduate School of Dentistry, Kanagawa Dental University
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Inhibitory effect of probiotic lactobacilli supernatants on single and mixed non-albicans Candida species biofilm. Arch Oral Biol 2017; 85:40-45. [PMID: 29031236 DOI: 10.1016/j.archoralbio.2017.10.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/02/2017] [Accepted: 10/03/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVES Oral candidiasis is one of the most common human fungal infections. While most cases of the Candida species isolated from the oral cavity are Candida albicans, a large number of candidiasis is attributed to non-albicans Candida species. In this study, we aim to evaluate the in vitro inhibition of supernatants of Lactobacillus gasseri and Lactobacillus rhamnosus on the single and mixed species biofilm of non-albicans Candida species, including Candida tropicalis, Candida krusei and Candida parapsilosis. DESIGN Cell-free supernatants of Lactobacillus gasseri and Lactobacillus rhamnosus were prepared. Single and mixed non-albicans Candida species biofilm were formed in the 96-well microplate and on the surfaces of medical grade silicone. Biomass and cell viability were tested with crystal violet and cell counting kit-8. In order to examine the ability of the supernatant to disrupt pre-formed biofilm, supernatant was added to 24h-old biofilms. Biofilm architecture on silicone was investigated by scanning electron microscopy and confocal laser scanning microscopy was used to examine live/dead organisms within biofilm. RESULTS Single and mixed species biofilms and cell viability of non-albicans Candida biofilms were inhibited by probiotic lactobacilli supernatants. Matrue biofilm formation was disrupted by lactobacilli supernatants added at 24h after biofilm initiation. Examination with confocal laser scanning microscopy and scanning electron microscopy confirmed that lactobacilli supernatants inhibited the mixed biofilms and damaged the cells. CONCLUSIONS Our data elucidate the inhibitory activity of probiotic lactobacilli on non-albicans Candida biofilm, so as to support their utility as an adjunctive therapeutic mode against oral candida infections.
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YOSHIZAKI T, AKIBA N, INOKOSHI M, SHIMADA M, MINAKUCHI S. Hydrophilic nano-silica coating agents with platinum and diamond nanoparticles for denture base materials. Dent Mater J 2017; 36:333-339. [DOI: 10.4012/dmj.2016-243] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Taro YOSHIZAKI
- Gerodontology and Oral Rehabilitation, Department of Gerontology and Gerodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Norihisa AKIBA
- Gerodontology and Oral Rehabilitation, Department of Gerontology and Gerodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Masanao INOKOSHI
- Gerodontology and Oral Rehabilitation, Department of Gerontology and Gerodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | | | - Shunsuke MINAKUCHI
- Gerodontology and Oral Rehabilitation, Department of Gerontology and Gerodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Menees TS, Radhakrishnan R, Ramp LC, Burgess JO, Lawson NC. Contact angle of unset elastomeric impression materials. J Prosthet Dent 2015; 114:536-42. [DOI: 10.1016/j.prosdent.2015.05.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 05/07/2015] [Accepted: 05/08/2015] [Indexed: 11/26/2022]
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Garner SJ, Nobbs AH, McNally LM, Barbour ME. An antifungal coating for dental silicones composed of chlorhexidine nanoparticles. J Dent 2015; 43:362-72. [DOI: 10.1016/j.jdent.2014.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/25/2014] [Accepted: 12/07/2014] [Indexed: 11/29/2022] Open
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Atay A, Piskin B, Akin H, Sipahi C, Karakas A, Saracli MA. Evaluation of Candida albicans adherence on the surface of various maxillofacial silicone materials. J Mycol Med 2013; 23:27-32. [PMID: 23375858 DOI: 10.1016/j.mycmed.2012.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 12/06/2012] [Accepted: 12/07/2012] [Indexed: 10/27/2022]
Abstract
OBJECTIVES Fungal infection resulting from Candida adherence on material surface is one of the most important medical risks for maxillofacial prosthesis wearers. Despite wide usage, there is a sparse data evaluating C. albicans adherence on various commercial maxillofacial silicone materials that have different surface contact angles. The objective of this study was to investigate the relationship between surface contact angle and fungal adherence on widely used maxillofacial silicone materials. MATERIALS AND METHODS Three maxillofacial silicone materials titled VST-50, A-2006, and A-2186F were used for fabrication of disc-shaped specimens. Surface contact angle of specimens were measured by the goniometric method. Adhesion quantity of two different C. albicans strains was evaluated with a colorimetric method using XTT/Coenzyme Q0. The Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis of data. RESULTS The lowest surface contact angle values with the highest Candida adhesion quantity were measured on the specimens fabricated with A-2006 silicone material. Statistically significant differences were found among three maxillofacial silicone materials in terms of both surface contact angle values and adhesion quantity (P<0.01). CONCLUSION There is a close relationship between surface contact angle and quantity of Candida adherence. However, it should be noted that various factors arising from material properties may affect the complex nature of the Candida adhesion process.
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Affiliation(s)
- A Atay
- Haydarpasa Training Hospital, Department of Prosthodontics, Istanbul, Turkey.
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Rodger G, Taylor RL, Pearson GJ, Verran J. In vitro colonization of an experimental silicone by Candida albicans. J Biomed Mater Res B Appl Biomater 2010; 92:226-35. [PMID: 19921746 DOI: 10.1002/jbm.b.31509] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Denture soft-lining materials are exposed to the oral cavity for long periods and are in continuous contact with saliva, subject to inhibition of liquid molecules, and susceptible to colonization by microorganisms. The opportunist yeast Candida albicans is of particular concern in this context, being associated with denture plaque and denture-related stomatitis. In this study, penetration of C. albicans into an experimental silicone elastomer soft-lining material was investigated under batch and continuous culture conditions. A model "denture plaque" microcosm was also used. Increasing the filler concentration within the elastomer decreased penetration under both batch and continuous culture conditions. In continuous culture, C. albicans penetration was significantly greater in pure culture than in the presence of bacteria after 72-h incubation (p < 0.05).
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Affiliation(s)
- Gillian Rodger
- Department of Infection, Centre for Infectious Diseases and International Health, Windeyer Institute of Medical Research, University College London, London, UK
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Hirotsu T, Nakayama K, Tsujisaka T, Mas A, Schue F. Plasma surface treatments of melt-extruded sheets of poly(L-lactic acid). POLYM ENG SCI 2004. [DOI: 10.1002/pen.10949] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Price C, Waters MGJ, Williams DW, Lewis MAO, Stickler D. Surface modification of an experimental silicone rubber aimed at reducing initial candidal adhesion. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2003; 63:122-8. [PMID: 11870644 DOI: 10.1002/jbm.10094] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Silicone rubber, which is a widely used biomaterial, is often used to make soft liners for permanent denture. Colonization of denture soft lining materials by Candida albicans can result in clinical problems. The aim of this study was to chemically modify the surface of an experimental silicone rubber in order to produce a silicone that was less susceptible to candidal colonization. Surface modification was carried out with the use of argon-plasma bombardment followed by silane treatment, which caused the incorporation of either hydrophilic or hydrophobic functional groups onto the surface. Changes in water contact angles and chemical analysis of the materials with scanning ion mass spectroscopy confirmed surface changes. In vitro assays were carried out using C. albicans to measure levels of adherence to the surface-modified silicone after 1 h. C. albicans exhibited very low adherence to all silane-treated surfaces, whether hydrophobic or hydrophilic. This led to the conclusion that incorporated long-chain functional groups were inhibiting the adherence of the yeast, possibly by the formation of a barrier between the surface of the material and the yeast. In conclusion, silane surface treatment of an experimental silicone rubber has been successful in reducing candidal adherence.
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Affiliation(s)
- C Price
- Department of Dental Health and Biological Sciences, Dental School, University of Wales College of Medicine, Heath Park, Cardiff CF14 4XY UK
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Uilk JM, Mera AE, Fox RB, Wynne KJ. Hydrosilation-Cured Poly(dimethylsiloxane) Networks: Intrinsic Contact Angles via Dynamic Contact Angle Analysis. Macromolecules 2003. [DOI: 10.1021/ma021154x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Janelle M. Uilk
- Department of Chemical Engineering, School of Engineering, Virginia Commonwealth University, Richmond, Virginia 23284-3028, and Materials Chemistry Branch, Code 6120, Naval Research Laboratory, Washington, D.C. 20375
| | - Ann E. Mera
- Department of Chemical Engineering, School of Engineering, Virginia Commonwealth University, Richmond, Virginia 23284-3028, and Materials Chemistry Branch, Code 6120, Naval Research Laboratory, Washington, D.C. 20375
| | - Robert B. Fox
- Department of Chemical Engineering, School of Engineering, Virginia Commonwealth University, Richmond, Virginia 23284-3028, and Materials Chemistry Branch, Code 6120, Naval Research Laboratory, Washington, D.C. 20375
| | - Kenneth J. Wynne
- Department of Chemical Engineering, School of Engineering, Virginia Commonwealth University, Richmond, Virginia 23284-3028, and Materials Chemistry Branch, Code 6120, Naval Research Laboratory, Washington, D.C. 20375
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Aziz T, Waters M, Jagger R. Surface modification of an experimental silicone rubber maxillofacial material to improve wettability. J Dent 2003; 31:213-6. [PMID: 12726706 DOI: 10.1016/s03005712(02)00131-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVES Good wettability of maxillofacial prosthetic materials is important so that a lubricating layer is formed with supporting tissues thus reducing patient discomfort. The purpose of the study was to surface modify an experimental silicone rubber material in order to improve wettability. METHODS Samples of experimental silicone rubber were surface modified by first argon plasma treatment followed by chemisorption of ethyleneoxy functional silanes. These were compared with the same silicone rubber which had ethyleneoxy functional surfactants incorporated into the polymer matrix. In all cases contact angles, tear strength and water uptake were measured. RESULTS Surface modified materials had comparable contact angles to surfactant modified silicone rubber all being significantly lower than the unmodified material. Surface modified materials, however, had a significantly higher tear strength and lower water uptake in comparison to surfactant modified materials. CONCLUSIONS Argon plasma treatment followed by chemisorption of ethyleneoxy functional silanes proved an effective way of improving the wettability of an experimental silicone rubber maxillofacial prosthetic material without altering bulk properties.
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Affiliation(s)
- Tariq Aziz
- Department of Basic Dental Science, College of Medicine, University of Wales, Heath Park, Cardiff CF14 4XY, UK
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