A comparison of three different methods for the quantification of the in vitro wear of dental materials

Heintze, Siegward D.; Cavalleri, A.; Forjanic, Monika; Zellweger, G.; Rousson, Valentin

doi:10.1016/j.dental.2005.08.010

Cited by 79 publications

(74 citation statements)

References 13 publications

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“…Many parameters have been used to evaluate wear resistance, e.g., weight loss 14) , volume loss 14,21) , wear depth [7][8][9]21) , or Ra 15,21,22) . In this study, the parameters Ra and Rz were adopted to evaluate the wear resistance.…”

Section: Discussionmentioning

confidence: 99%

“…Parameter Rz corresponds Rmax in the old Japanese Industrial Standards (JIS B0601:1982); the wear parameters Rmax (Rz) and weight loss were very closely related: one can be predicted from the other 23) . The parameter Ra is also one of the vertical parameter and is frequently used for the quantification of wear facets 21) . As shown Table 4, the Ra of the Cerasmart and Shofu Block HC materials was significantly larger than that of the ceramic block after toothbrush abrasion.…”

Section: Discussionmentioning

confidence: 99%

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Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion

Koizumi

Saiki

Nogawa

et al. 2015

Dental Materials Journal

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The purpose of this study was to evaluate the gloss and surface roughness behaviors of newly developed CAD/CAM composite blocks with different filler contents and characteristics. The gloss and surface roughness were quantified before and after a toothbrush dentifrice abrasion test; the results were compared to the gloss and surface roughness of a ceramic CAD/CAM block. Knoop hardness was determined before abrasion test. The results were analyzed by ANOVA, Tukey HSD, and Dunnett t test (p<0.05). The rank order of Knoop hardness was as follows: Vita Mark II>Vita Enamic>Gradia block>Shofu Block HC, Lava Ultimate≥Katana Avencia block≥Cerasmart. After toothbrush abrasion, a significant difference in the gloss unit was detected between the Shofu Block HC material and the ceramic block. The Ra and Rz of the Cerasmart and Shofu Block HC materials were significantly larger than those of the ceramic block after toothbrush abrasion.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion

Koizumi

Saiki

Nogawa

et al. 2015

Dental Materials Journal

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“…Restorative materials should possess wear properties similar to those of natural teeth. This is essential for the reduction of induced pathological 5 consequences (Heintze et al, 2006). The wear behavior of polished zirconia of the first generation showed only marginal wear rates on enamel antagonists and almost no wear in the zirconia itself (Stawarczyk et al, 2013b).…”

Section: Introductionmentioning

confidence: 99%

Comparison of four monolithic zirconia materials with conventional ones: Contrast ratio, grain size, four-point flexural strength and two-body wear

Stawarczyk

Frevert

Ender

et al. 2016

Journal of the Mechanical Behavior of Biomedical Materials

129

113

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OBJECTIVES: To test the mechanical and optical properties of monolithic zirconia in comparison to conventional zirconia. MATERIALS AND METHODS: Specimens were prepared from: monolithic zirconia: Zenostar (ZS), DD Bio ZX2 hochtransluzent (DD), Ceramill Zolid (CZ), InCoris TZI (IC) and a conventional zirconia Ceramill ZI (CZI). Contrast ratio (N=75/n=15) was measured according to ISO 2471ISO :2008. Grain sizes (N=75/n=15) were investigated with scanning electron microscope. Fourpoint flexural strength (N=225/n=15/zirconia and aging regime) was measured initially, after aging in autoclave or chewing simulator (ISO 13356:2008). Two-body wear of polished and glazed/veneered specimens (N=108/n=12) was analyzed in a chewing simulator using human teeth as antagonists. Data were analyzed using 2-/1-way ANOVA with post-hoc Scheffé, Kruskal-Wallis-H, Mann-Whitney-U, SpearmanRho, Weibull statistics and linear mixed models (p<0.05). RESULTS: The lowest contrast ratio values were found for ZS and IC and CZ. IC showed the largest grain size followed by DD and CZI. The smallest grain size was observed for ZS followed by CZ. There was no correlation between grain size and contrast ratio. The aging regime showed no impact on flexural strength. All non-aged and autoclave-aged specimens showed lower flexural strengths than the control group CZI. Within groups aged in chewing simulator, ZS showed significantly lower flexural strength than CZI. CZI showed higher material and antagonist wear than monolithic polished and glazed groups. Glazed specimens showed higher material and antagonist loss compared to polished ones. There was no correlation between roughness and wear. CONCLUSIONS: Monolithic zirconia showed higher optical, but lower mechanical properties than conventional zirconia. (ISO 13356:2008). Two-body wear of polished and glazed/veneered specimens (N=108/n=12) was analyzed in a chewing simulator using human teeth as antagonists. Data were analyzed using 2-/1-way ANOVA with post-hoc Scheffé, Kruskal-Wallis-H, Mann-Whitney-U, Spearman-Rho, Weibull statistics, and linear mixed models (p<0.05).Results. The lowest contrast ratio values were found for ZS and IC and CZ. IC showed the largest grain size followed by DD and CZI. The smallest grain size was observed for ZS followed by CZ. There was no correlation between grain size and contrast ratio. The aging regime showed no impact on flexural strength. All non-aged and autoclave-aged specimens showed lower flexural strengths than the control group CZI. Within groups aged in chewing simulator, ZS showed significantly lower 3 flexural strength than CZI. CZI showed higher material and antagonist wear than monolithic polished and glazed groups. Glazed specimens showed higher material and antagonist loss compared to polished ones. There was no correlation between roughness and wear.Conclusions. Monolithic zirconia showed higher optical, but lower mechanical properties than conventional zirconia.

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“…This new high molecular volume dimethacrylate monomer is the main organic component of the Epiphany TM root canal sealant, which has recently been applied in the clinic. Unfortunately, microleakage due to polymerization shrinkage of Epiphany TM still happens [3][4][5][6]. Based on their investigations of the relationship between polymerization shrinkage and the conversion of double bonds during polymerization of Bis-GMA, Venhoven et al [7] revealed that polymerization shrinkage of monomers is directly influenced by the concentration and conversion of the double bonds.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Dimethacrylate Monomer with High Molecular Weight for Root Canal Filling Materials

Liu

Zhao

et al. 2006

Molecules

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Abstract:A new dimethacrylate monomer 9,9'-bis[4-(2'-hydroxy-3'-methacryloyloxypropoxy)phenyl] fluorene (3) with a molecular weight of 634 was synthesized in 51.4% yield by addition of a glycidyl ether group to 9,9'-bis(4-hydroxyphenyl) fluorene (1) by the reaction of compound 1 with epichlorohydrin, and then introducing the methacrylate moiety by the reaction of the epoxy group with methacrylic acid. The structure of monomer 3 was confirmed by FT-IR, 1 H-NMR, mass spectra and elemental analysis.

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A comparison of three different methods for the quantification of the in vitro wear of dental materials

Cited by 79 publications

References 13 publications

Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion

Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion

Comparison of four monolithic zirconia materials with conventional ones: Contrast ratio, grain size, four-point flexural strength and two-body wear

Synthesis and Characterization of Dimethacrylate Monomer with High Molecular Weight for Root Canal Filling Materials

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