Effect of simulated mastication on the surface roughness of three ceramic systems

Amer, Rafat; Kürklü, Duygu; Johnston, William M.

doi:10.1016/j.prosdent.2015.02.018

Cited by 56 publications

(41 citation statements)

References 20 publications

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“…Wear had little effect on roughness and no influence on phase transformation. Amer et al [38] reported that surface roughness of monolithic zirconia did not change after being subjected to three-body wear-opposing human enamel as conventional feldspathic porcelain.…”

Section: Surface Roughnessmentioning

confidence: 99%

An overview of monolithic zirconia in dentistry

Malkondu

Tınastepe

Akan

et al. 2016

Biotechnology & Biotechnological Equipment

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Zirconia restorations have been used successfully for years in dentistry owing to their biocompatibility and good mechanical properties. Because of their lack of translucency, zirconia cores are generally veneered with porcelain, which makes restorations weaker due to failure of the adhesion between the two materials. In recent years, all-ceramic zirconia restorations have been introduced in the dental sector with the intent to solve this problem. Besides the elimination of chipping, the reduced occlusal space requirement seems to be a clear advantage of monolithic zirconia restorations. However, scientific evidence is needed to recommend this relatively new application for clinical use. This mini-review discusses the current scientific literature on monolithic zirconia restorations. The results of in vitro studies suggested that monolithic zirconia may be the best choice for posterior fixed partial dentures in the presence of high occlusal loads and minimal occlusal restoration space. The results should be supported with much more in vitro and particularly in vivo studies to obtain a final conclusion.

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Section: Surface Roughnessmentioning

confidence: 99%

An overview of monolithic zirconia in dentistry

Malkondu

Tınastepe

Akan

et al. 2016

Biotechnology & Biotechnological Equipment

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“…Regarding surface treatments, polished monolithic zirconia showed significantly lower wear rate on enamel antagonists than that produced by glazed monolithic samples (20) .…”

Section: Introductionmentioning

confidence: 87%

“…(18) In the present study, enamel antagonists were used in an attempt to simulate clinical situations. Enamel antagonists were used to conduct several similar in-vitro studies (20,27,30,31) . However, using enamel antagonist was sometimes criticized due to morphological and structural differences among enamel samples which make standardization difficult (26) .…”

Section: Suad M Hassan and Nevin A Gadmentioning

confidence: 99%

“…However, using enamel antagonist was sometimes criticized due to morphological and structural differences among enamel samples which make standardization difficult (26) . To decrease the amount of inhomogeneity; standardization of enamel samples through grinding and polishing was sometimes suggested (20,32) . The standardization procedure included grinding the cusp tip to achieve the desired shape.…”

Section: Suad M Hassan and Nevin A Gadmentioning

confidence: 99%

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Two-Body Wear And Surface Roughness of Three Different Ceramic Systems And Their Enamel Antagonist: An In Vitro Study

Hassan

Gad

2017

ADJ-for Girls

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Statement of the problem: Ceramics and glass-ceramics are materials of choice for dental crowns due to their attractive hardness, biocompatibility, etc. However, a major problem with their usage is the observed high wear of either the opposing dental enamel or both the enamel and ceramic itself. Objective: The present study aimed at ranking and comparing the wear performance of three different ceramic systems as an indication of wear. In addition, change in surface roughness was calculated using optical surface profiler. Results: The statistically significant highest mean material's weight loss was recorded in porcelain group, whereas the statistically significant lowest mean weight loss was recorded in BruxZir group. The statistically significant greatest mean antagonist weight loss was recorded for e.max antagonist cusp, whereas the statistically significant lowest mean weight loss was recorded for BruxZir antagonist cusp.Surface roughness increased after wear procedure in all samples. Conclusions: Within the limitations of this in vitro study, monolithic zirconia and porcelain resulted in less wear depth to human enamel compared to lithium disilicate based ceramics (e.max CAD). However, porcelain is more affected by wear compared to zirconia.

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“…Fracture toughness is defined as the resistance of brittle materials to rapid crack propagation 13 . Then, this property represents serviceability in the oral cavity 14 .…”

Section: Introductionmentioning

confidence: 99%

Fracture toughness of three heat pressed ceramic systems

et al. 2018

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Aim: The aim of this study was to evaluate fracture toughness by indentation method of three dental ceramics processed by heat pressing. The ceramics evaluated were fluorapatite glass ceramic (ZIR), glass ceramic containing leucite (POM) and leucite-reinforced glass ceramic (EMP). Materials and methods: Ninety disks (13mm of diameter x 4mm of thickness) and nine rectangular specimens (25x4x2mm) were made to evaluate, respectively, microhardness/fracture toughness (n=30) and elastic modulus (n=3). Samples were obtained by pressing ceramic into refractory molds. After polishing, Vickers microhardness was evaluated under 4,904N load for 20s. Elastic modulus was measured by impulse excitation technique. Data from microhardness and elastic modulus were used to calculate fracture toughness, after measuring crack length under 19,6N load applied for 20s. Results were evaluated by ANOVA and Tukey´s test. Results: Microhardness (VHN) of POM (637.9±53.6) was statistically greater (p<0.05) than ZIR (593.0±14. The results suggest that fluorapatite glass ceramic (ZIR) and leucite-reinforced glass ceramic (EMP) processed by heat pressing presented greater fracture toughness, improving clinical prognosis of metal free restorations.

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Effect of simulated mastication on the surface roughness of three ceramic systems

Cited by 56 publications

References 20 publications

An overview of monolithic zirconia in dentistry

An overview of monolithic zirconia in dentistry

Two-Body Wear And Surface Roughness of Three Different Ceramic Systems And Their Enamel Antagonist: An In Vitro Study

Fracture toughness of three heat pressed ceramic systems

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