In Vitro Wear of Nano‐Composite Denture Teeth

Suzuki, Shiro

doi:10.1111/j.1532-849x.2004.04043.x

Cited by 101 publications

(116 citation statements)

References 23 publications

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“…Disk-shaped specimens, 4 mm in diameter and 2 mm in thickness, of the experimental unfilled resin and three composite resins were heat-polymerized. Vickers hardness values (HV0.3) of the unfilled resin and composite resins ranged from 21.5 to 27.3 kgf/ mm, which were similar to commercial composite resin artificial teeth 2) . Seventy-five specimens of each resin were prepared.…”

Section: Specimen Preparationmentioning

confidence: 89%

“…A common feature of the enamel or occlusal layer of composite resin artificial teeth is its highly crosslinked structure, which exhibited little swelling even after 12 hours of immersion in methyl methacrylate (MMA) 1) . As for the wear resistance of composite resin artificial teeth, an in vitro study showed that it has been improved compared to conventional denture teeth 2) . However, it must be highlighted that wear of composite resin denture teeth varies depending on the antagonist and that greater wear is incurred with certain antagonists 3) .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ultraviolet Light Irradiation on Bonding of Experimental Composite Resin Artificial Teeth

et al. 2007

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The purpose of the present study was to evaluate how ultraviolet light (UV) irradiation using an ordinary UV sterilizer would affect the bonding of experimental composite resins to an autopolymerizing acrylic resin. To this end, three composite resins and one unfilled resin -of which the compositions were similar to commercial composite resin artificial teeth -were prepared as repair composites. Their shear bond strengths after UV irradiation for one to 60 minutes were significantly greater than those before UV irradiation regardless of composite resin type. Failure mode after UV irradiation for one to 60 minutes was mainly cohesive failure of the composite resins, but that before UV irradiation and after 24 hours' irradiation was mainly adhesive failure. These results thus suggested that a short period of UV irradiation on composite resin teeth would improve the bonding efficacy of composite resin artificial teeth to autopolymerizing resin.

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Section: Specimen Preparationmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Effect of Ultraviolet Light Irradiation on Bonding of Experimental Composite Resin Artificial Teeth

et al. 2007

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“…Hardness is considered a material property related to wear resistance and it is usually used as an indicator of several mechanical properties of synthetic restorative materials and artificial teeth. [15][16][17] The aim of this study was to map the microhardness of nine artificial teeth brands according to depth. The null hypotheses were that all commercial brands of analyzed teeth present similar hardness and that all depths present similar hardness.…”

Section: Introductionmentioning

confidence: 99%

Transverse microhardness of artificial teeth

et al. 2015

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| Objective:Hardness is an indicator of several mechanical properties of artificial teeth, also related to wear resistance.The purpose of this article is to map the microhardness of artificial teeth as a function of depth and commercial brand. Methods: Knoop microhardness of sectioned artificial second molars was measured every 200 µm starting at a depth of 100 µm up until 4700 µm of the following brands: Premium (Pr), Orthosit (Or), SR Postaris DCL (Po), Biotone (Bi), Artiplus IPN (Ar), VITA MFT (Vi), Natusdent (Na), Trilux (Tr), and Biolux (Bx). Results were analyzed with ANOVA for repeated measures and Tukey test (5%). Results: SR Orthosit PE commercial brand presented higher hardness values (until the depth of 3.1 mm was 30 N/mm 2 ), significantly higher than the other brands analyzed. Conclusion: Knoop hardness did not present differences between layers for eight of the nine brands studied. Different hardness values were found between superficial and cervical areas for the brand SR Orthosit PE.DESCRIPTORS | Artificial Tooth; Hardness; Acrylic Resins. RESUMO | Microdureza de dentes artificiais em suas diferentes camadas • Objetivo:A dureza é tida como indicador de várias propriedades mecânicas de dentes artificiais, e relacionada a resistência ao desgaste. O objetivo foi mapear a microdureza de dentes artificiais de 9 marcas em função da profundidade. Métodos: foi medida a microdureza Knoop de segundos molares cortados num plano sagital em intervalos de 200 µm a partir da profundidade de 100 µm até 4700 µm, das marcas: Premium (Pr), Orthosit (Or), SR Postaris DCL (Po), Biotone (Bi), Artiplus IPN (Ar), VITA MFT (Vi), Natusdent (Na), Trilux (Tr) and Biolux (Bx). A ANOVA de medidas repetidas e o teste de Tukey (5%) analisaram os resultados. Resultados: A marca SR Orthosit PE apresentou a maior dureza (até a profundidade de 3,1 mm foi da ordem de 30 N/mm 2 ), significativamente maior que todas as outras medidas realizadas (da ordem de 20 N/mm 2 ). Conclusão: A dureza Knoop não evidenciou diferenças entre camadas para oito das nove marcas estudadas. Foi constatada diferente dureza entre a superfície e a região cervical para a marca SR Orthosit PE. DESCRITORES |

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“…Resin composites with smaller filler particles can exhibit a smoother surface than those with larger particles after toothbrush/dentifrice abrasion 8) and finishing/polishing 9) . For dentures, nanocomposite teeth are reported to be harder and more wearresistant than the usual acrylic ones 10) . However, it is generally more difficult to achieve industrial fabrication of highly filled dental composites with smaller filler particles.…”

Section: Introductionmentioning

confidence: 99%

Effects of Monomer Composition and Original Filler Content on Filler Loading in the Resulting Centrifuged Composites

et al. 2007

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This study examined the effects of monomer composition, original filler content, and application of centrifugal force on the resulting filler loading of composites. Either Bis-MPEPP or UDMA was mixed with TEGDMA at a molar ratio of 1：1. Silane-treated silica (14 -20 wt％) was added to each mixture. After the mixtures were centrifuged and light-polymerized, rate of increase was determined as the filler increment of 2.0-mm-high, disk-shaped sections of specimen when compared against the uncentrifuged filler content. Both the original filler loading and monomer composition influenced the filler content of the centrifuged composites. Fillers in Bis-MPEPP-based composites exhibited a higher rate of condensation after application of centrifugal force than did UDMA-based composites. The results were suggestive of underlying relationships among the composition, component stability, and post-polymerization properties of flowable composites.

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In Vitro Wear of Nano‐Composite Denture Teeth

Abstract: The nano-composite tooth was harder and more wear resistant than the acrylic teeth but not significantly different from most of the cross-linked and micro-filled composite teeth tested.

Cited by 101 publications

References 23 publications

Effect of Ultraviolet Light Irradiation on Bonding of Experimental Composite Resin Artificial Teeth

Effect of Ultraviolet Light Irradiation on Bonding of Experimental Composite Resin Artificial Teeth

Transverse microhardness of artificial teeth

Effects of Monomer Composition and Original Filler Content on Filler Loading in the Resulting Centrifuged Composites

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