Adherence of Candida albicans to denture-base materials with different surface finishes

Radford, David R.; Sweet, S. P.; Challacombe, Stephen; Walter, John

doi:10.1016/s0300-5712(97)00034-1

Cited by 267 publications

(305 citation statements)

References 18 publications

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“…Surface irregularities increase microorganism accumulation on the denture surface (19,29). Therefore, the nanoparticle addition must enable the surface roughness to remain within acceptable clinical limits while improving the mechanical properties of the material.…”

Section: Discussionmentioning

confidence: 99%

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The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

Ergün

Şahin

Ataol

2018

Journal of Oral Science

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Abstract:The aim of the present study is to evaluate the transverse strength, modulus of elasticity, surface roughness, hardness, and water sorption/solubility of nanoparticle zirconium oxide (nano-ZrO 2 ) added to heat-cured poly(methyl methacrylate) (PMMA) after thermocycling. The specimens were divided into four groups according to the ratio of nano-ZrO 2 addition to heat-cured PMMA; group 1: 5% nano-ZrO 2 ; group 2: 10% nano-ZrO 2 ; group 3: 20% nano-ZrO 2 , and group 4 (control): PMMA without nano-ZrO 2 . A statistically significant decrease in transverse strength was observed by all additional rates of nanoZrO 2 compared with group 4 (control; P < 0.025). When hardness results were evaluated, groups 1 and 2 showed statistically higher values compared with groups 3 and 4 (P < 0.025). The surface roughness of group 3 was statistically higher than the other groups (P < 0.025), but it was within the clinically acceptable limits. As the nano-ZrO 2 addition rate increased, water sorption/solubility values of the specimens also increased. Although nano-ZrO 2 addition had an adverse effect on some mechanical and physical properties of heat-cured PMMA, it increased hardness values, implying that the addition of nano-ZrO 2 would contribute positively to some mechanical properties of PMMA denture base material when nano-ZrO 2 was homogeneously distributed in PMMA.

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Section: Discussionmentioning

confidence: 99%

“…The roughness of PMMA is important as surface irregularities increase microorganism accumulation on the denture (19) and have undesired effects such as discoloration of the prosthesis. Moreover, water sorption and solubility are not favorable characteristics for denture base materials (20,21).…”

Section: Introductionmentioning

confidence: 99%

The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

Ergün

Şahin

Ataol

2018

Journal of Oral Science

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“…Bacterial and fungal species have more of a propensity to adhere to rough denture base materials. (33,34) The surface roughness of a material used for removable prostheses is of importance because it affects, directly or indirectly; retention, staining resistance, plaque accumulation, oral tissue health, and patient comfort. (35,36) On the other hand, the results of this study showed that polymerization in the autoclave led to a statistically significant difference in surface roughness test that indicate at this level of heat and pressure of autoclave processing cycle the beginning of reaction of the material to external elements.…”

Section: Discussionmentioning

confidence: 99%

Strength and Surface Roughness of Cross Linking Acrylic Resin Processed by Different Heat Curing Methods

Kareem

2015

Iraqi dent. j.

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Background: Heat-cured acrylic resin is considered one of the most commonly used denture base material in denture construction, but this material is not ideal in every respect. So many researches have been carried out to find an alternative material like cross linking acrylic resin. Meanwhile, the curing procedures have been modified to improve the physical and mechanical properties of resin materials .The aim of this study was to evaluate the effect of three curing methods:(water bath, autoclave short cycle and autoclave long cycle) on transverse strength, tensile strength and surface roughness of cross linking acrylic denture base materials. Material and method: Cross linking acrylic resin was used in this study and processed in three curing methods (water bath, autoclave short cycle and autoclave long cycle). Ninety specimens were prepared. Each main group was subdivided into three subgroups according to the type of test used (transvers strength test, tensile strength test and surface roughness test). Each group contained 10 specimens for each test. Result:Three tests were used to analyze the results: analysis of variance (ANOVA), the least significant difference (LSD) and an independent T-test. There were no significant differences between the results of the processing techniques regarding transverse and tensile strength but there was a significant difference between the results of surface roughness tests. Conclusion: It was concluded that autoclave curing method can be used with different duration whether it is short or long instead of water bath curing method.

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“…The higher porosity provides an increased chance of microbial retention and protection from the shear forces that arise during mechanical and chemical cleaning [9,10]. PMMA denture bases with a SR above 0.2 µm have been shown to be readily colonized by C. albicans [6,7].…”

Section: Introductionmentioning

confidence: 99%

Surface roughness influences Candida albicans biofilm formation on denture materials

Silva

Gonçalves

Viu

et al. 2016

Rev. Odonto Ciênc. (Online)

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Objective: This study aimed to evaluate the influences of surface roughness (SR) of denture base and liner materials on Candida albicans biofilm formation. Methods: Discs were fabricated using poly (methyl methacrylate) acrylic resin and poly(ethyl methacrylate) denture liner, according to manufacturers' instructions. Both acrylic resin and relined discs were finished or finished + polished and the SR was measured. Discs were saliva-coated, and C. albicans biofilms were developed on such surfaces for 48 hours. Biofilms were evaluated for cell counts, metabolic activity, and structural characteristics. Data were analyzed by one-way ANOVA and Tukey tests using a significance level of 5%. Results: Finished acrylic resin and denture liner discs had higher SR compared to finished + polished discs (P<0.001). Finished + polished acrylic resin discs contained fewer cells compared to only finished discs (P<0.001). No metabolic activity differences were seen between biofilms formed on both groups (P>0.05). Bulky, thick and less rough biofilms were formed on only finished denture materials (P<0.05). Confocal images reveal increased presence of black spaces for biofilms developed on finished + polished discs. Conclusion: Reduced SR resulted in decreased C. albicans biofilm accumulation on both denture materials.Key words: Acrylic resins; Biofilms; Candida albicans A rugosidade de superfície de materiais para prótese influencia a formação de biofilmes de Candida albicans RESUMO Objetivo: Este estudo avaliou a influência da rugosidade de superfície (RS) de resina acrílica e materiais de reembasamento na formação de biofilmes de Candida albicans. Métodos: Discos foram fabricados usando resina acrílica a base de poli(metil metacrilato) e reembasador a base de poli(etil metacrilato), seguindo as instruções dos fabricantes. Os discos tiveram a superfície acabada ou acabada + polida, e RS mensurada. Película de saliva foi formada na superfície dos discos, e biofilmes de C. albicans foram desenvolvidos por 48 horas. Biofilmes foram analisados para contagem, atividade metabólica e estrutura. Os dados foram analisados por ANOVA seguido do teste de Tukey a 5%. Resultados: Os discos apenas acabados apresentaram maior RS comparado aos acabados + polidos (P<0,001). Discos de resina acabados + polidos formaram biofilmes com menos células quando comparados aos apenas acabados (P<0,001). Não houve diferença para a atividade metabólica (P>0,05). Biofilmes volumosos, espessos e menos rugosos foram formados nos discos acabados (P<0,05). As imagens de confocal revelam o aumento da presença de espaços negros nos biofilmes em discos acabados + polidos. Conclusão: Menores valores de RS resultaram em reduzido acúmulo de biofilme de C. albicans em ambos materiais para prótese.

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Adherence of Candida albicans to denture-base materials with different surface finishes

Cited by 267 publications

References 18 publications

The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

Strength and Surface Roughness of Cross Linking Acrylic Resin Processed by Different Heat Curing Methods

Surface roughness influences Candida albicans biofilm formation on denture materials

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