Effect of food-simulating liquids on the mechanical properties of provisional restorative materials

Akova, Tolga; Özkömür, Ahmet; Uysal, Hakan

doi:10.1016/j.dental.2005.09.009

Cited by 84 publications

(102 citation statements)

References 16 publications

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“…ThehardnessofFiltekSiloranewaslowerthanthose of the MBCs in the control and heptane groups (p<0.05). 16) . Thus, taken together, there are many compromising conditions and circumstances whereby restoratives are subjected to prolonged exposure to these agents.…”

Section: Resultsmentioning

confidence: 99%

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Effects of food-simulating liquids on the mechanical properties of a silorane-based dental composite

et al. 2009

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The purpose of this study was to investigate the effects of food-simulating liquids (FSL) on the hardness and flexural strength (FS) of a new silorane-based composite and to compare it with methacrylate-based composites (MBCs). Four restorative materials(FiltekSilorane,P60,Z250,andSupremeXT)wereused.SpecimensfortheFSandhardnessmeasurementswere fabricated in customized molds. Immediately after polymerization, the materials were stored in the following dietary simulatingsolventsat37ºCfor1week:distilledwater,0.02Ncitricacid,heptane,and75%aqueousethanolsolution.After conditioning, the FS and hardness values were measured. Data were subjected to ANOVA/Scheffé's test at a significance level of 0.05. The hardness and FS of Filtek Silorane were not significantly affected by FSL (p>0.05).Conversely,thehardnessof MBCs significantly decreased after conditioning in water and ethanol (p<0.05). Similarly, the FS values of MBCs were significantly affected after conditioning in ethanol.

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Section: Resultsmentioning

confidence: 99%

“…The deleterious effectsofweakintraoralacids(citricandlacticacids) on inorganic fillers may also contribute to decreased flexural strength 16) . In this study, the hardness and flexural strength of all tested composites were not significantly changed after conditioning for 7 days in citric acid.…”

Section: Discussionmentioning

confidence: 99%

Effects of food-simulating liquids on the mechanical properties of a silorane-based dental composite

et al. 2009

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“…In addition, degradation of the inorganic fillers may also play a role in the reduction of the material properties (25) .…”

Section: Discussionmentioning

confidence: 99%

“…Heptane decreases the mechanical properties of the composite resin materials as it is an organic solution that can potentially damage the resin matrix, producing cracks in the interface, and consequently, weakens the material (19,21,25) . In addition, degradation of the inorganic fillers may also play a role in the reduction of the material properties (25) .…”

Section: Discussionmentioning

confidence: 99%

Effect of Food Simulating Liquids and Thermo-cycling on flexural strength and surface hardness of a Resin Nano-Ceramic CAD/CAM Material

2016

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Purpose: Evaluate the effect of food simulating liquids and thermocycling on miniflexural strength and surface micro-hardness of a resin nano-ceramic material (Lava Ultimate) compared to indirect laboratory composite resin material (Nexco Paste) and direct composite resin material (Filtek Z350 XT). Material and Methods:A total number of 180 samples were fabricated. The samples were divided equally into 3 groups (n=60). Group 1 (M 1 ) samples were fabricated from the resin nano ceramic CAD/CAM blocks (Lava Ultimate), group 2 (M 2 ) samples were farbricated form indirect micro-hybrid resin composite (Nexco Paste), while group 3 (M 3 ) samples were fabricated from direct resin composite (Filtek Z350 XT). Thirty bars (12X2X2mm) from each material were fabricated to evaluate the mini flexural strength. Thirty disks (8X2mm) were fabricated from each material to evaluate the surface micro-hardness. The samples of M 1 groups were fabricated by cutting from the CAD/CAM block using low speed diamond disk while samples of M 2 and M 3 samples were fabricated using teflon mold. Each material samples were further subdivided into 6 subgroups; the first subgroup was not immersed into food simulating liquids nor thermocycled, 4 subgroups samples were immersed into food simulating liquids (water, ethanol, heptane and citric acid) and the last subgroup samples were thermocycled. Mini flexural strength test was done using universal testing machine and surface hardness was done using Vickers hardness tester.Results: Lava Ultimate showed the significantly highest mini flexural strength and surface micro-hardness values before and after immersion into food simulating liquids and thermocycling compared to the two other tested materials. Conclusion:According to the results of the present study, Lava Ultimate showed better mini flexural strength and surface micro-hardness compared to the two other tested materials.

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“…Materyallerin aşınmaya karşı dirençleri sertliklerine bakılarak tahmin edilebilmektedir. 9,10 Sertlik testleri protez dişlerinin aşınmaya dirençlerini test etmede en çok kullanılan yöntemdir. 9 Akrilik protez dişlerin aşınmaya karşı dirençli olması, protezlerin uzun dönem başarısı için önemlidir.…”

Section: Introductionunclassified

Ki̇myasal Temi̇zleyi̇ci̇leri̇n Akri̇li̇k Di̇şleri̇n Yüzey Sertli̇kleri̇ne Etki̇si̇

Ekren¹,

Özkömür²

2015

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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ÖZET ABSTRACT Aim:The aim of this study was to investigate the effect of three chemical denture cleansers on the Knoop hardness of the acrylic denture teeth. Material and Method: Premolar and molar acrylic denture teeth from two manufacturers were embedded in cold cured acrylic resin. The occlusal surfaces of teeth were flat grounded and polished. The specimens were randomly divided into 4 groups and immersed in three different chemical disinfection (Protefix, Corega Tabs and %1 NaOCl) and distilled water (Control group) for 8 hours/day during 7 days. The specimens were submitted to Knoop hardness measurements immediately after disinfection procedures. Data were analyzed with one way ANOVA and Tukey's statistical test. Result: All Vitapan group exhibited higher Knoop hardness values than Major Dent groups both in control and experimental groups. The tested chemical denture cleaning methods did not show any significant effect on Knoop hardness of the artificial teeth. Conclusion: Within the limitations of this study it can be concluded that exposure of artificial teeth to chemical disinfectants did not affect the hardness of the acrylic teeth.

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Effect of food-simulating liquids on the mechanical properties of provisional restorative materials

Cited by 84 publications

References 16 publications

Effects of food-simulating liquids on the mechanical properties of a silorane-based dental composite

Effects of food-simulating liquids on the mechanical properties of a silorane-based dental composite

Effect of Food Simulating Liquids and Thermo-cycling on flexural strength and surface hardness of a Resin Nano-Ceramic CAD/CAM Material

Ki̇myasal Temi̇zleyi̇ci̇leri̇n Akri̇li̇k Di̇şleri̇n Yüzey Sertli̇kleri̇ne Etki̇si̇

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