Durability of Diamond Burs for the Fabrication of Ceramic Crowns Using Dental CAD/CAM

Yara, Atsushi; Ogura, Hideo; Shinya, Akiyoshi; Tomita, Shoko; Miyazaki, Takashi; Sugai, Yasuhisa; Sakamoto, Yuuki

doi:10.4012/dmj.24.134

Cited by 26 publications

(31 citation statements)

References 8 publications

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“…In particular, the porcelain firing cycle can cause a negative effect on the marginal fit of all-ceramic crowns 3) , and hence the success of the restorations 4,5) . All-ceramic crowns can be fabricated using two types of computer-aided design/computer-aided manufacturing (CAD/CAM) systems [6][7][8] : a doublelayer type which has a high-strength core, and a single-layer type without core (the entire crown is fabricated by a CAD/CAM system). The addition of porcelain to the copings of double-layer type may cause a negative effect on the fit of the crowns 3,9) .…”

Section: Introductionmentioning

confidence: 99%

Marginal and Internal Fit of All-ceramic Crowns Fabricated with Two Different CAD/CAM Systems

et al. 2008

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This study evaluated the accuracy of marginal and internal fit between the all-ceramic crowns manufactured by a conventional double-layer computer-aided design/computer-aided manufacturing (CAD/CAM) system and a single-layer system. Ten standardized crowns were fabricated from each of these two systems: conventional double-layer CAD/CAM system (Procera) and a single-layer system (Cerec 3D). The copings and completed crowns were seated on the abutments by a special device that facilitated uniform loading, and the marginal discrepancies were measured. Internal gaps were also measured using a low-viscosity silicone material. Marginal discrepancies of Procera copings were significantly smaller than those of Procera crowns and Cerec 3D crowns (p<0.05), but Procera crowns and Cerec 3D crowns did not differ significantly from each other (p>0.05). On internal gaps, Cerec 3D crowns showed significantly larger internal gaps than Procera copings and crowns (p<0.05). Within the limitations of this study, the single-layer system demonstrated acceptable marginal and internal fit.

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Section: Introductionmentioning

confidence: 99%

Marginal and Internal Fit of All-ceramic Crowns Fabricated with Two Different CAD/CAM Systems

et al. 2008

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“…It was observed that the great majority of the milled frameworks presented a smooth surface (Figure 4-a). Some rougher surfaces probably due to the excess number of frameworks milled with the same bur 8 were discarded (Figure 4-b).…”

Section: Resultsmentioning

confidence: 99%

Mechanical behavior of non veneered three unit fixed partial dentures of alumina-zirconia Under cyclic load in wet environment

2010

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The aim of this study was to evaluate the fatigue behavior in wet environment of a ZTA three unit FPDs processed via CAD-CAM. Thirty four three unit FPDs (In-Ceram ® Zirconia BZ blanks) were grinded through a CEREC In-Lab equipment followed by glass infiltration and sandblasting. Those frameworks were then submitted to different number of load cycles (400 N, 1 Hz). The FPDs that did not fractured by fatigue were submitted to a bending test in order to determine the influence of load cycling on its residual load. The non-parametric Kruskal-Wallis of those tests have shown with a 95% confidence, that there is a clear relation between the number of load cycles and its residual load. The fracture mode most frequently encountered on those FPDs was through the distal connector.

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“…When used for frameworks, this material is usually sintered into a block and the completely sintered block is milled mechanically using a CAD/CAM system. However, this method presents some problems, such as the setup and operating costs of the CAD/CAM system and premature wear of the cutting tool 11) . Furthermore, it has been reported that when subjected to milling, even high-strength zirconia-based materials are often reduced in strength 12) or that the process may generate microcracks 13) .…”

Section: Discussionmentioning

confidence: 99%

Electrophoretic Deposition Zirconia/Alumina of Ceria-stabilized Zironia/Alumina Powder

Nakamura¹,

Nishida

Sekino

et al. 2007

Dent. Mater. J.

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The aim of this study was to evaluate the electrophoretic deposition (EPD) behavior of ceria-stabilized zirconia/alumina (Ce-TZP/Al2O3) granulated powder. Two types of slurry with powder-to-solvent ratios of 10 wt％ and 20 wt％ were used. Zeta potential of the slurries was measured using a spectrometer at different pH levels. Then, EPD was performed to measure the weight of the deposited particles at varying pH levels and at two voltages (50 V and 100 V). The isoelectric point of Ce-TZP/Al2O3 mixed powder was approximately at pH 8.5. When EPD was performed, deposition of ceramic particles was typically observed in the range of pH 3 to pH 7, with the greatest deposition found at around pH 7. Moreover, the deposition of ceramic particles increased with increase in slurry concentration and voltage.

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Durability of Diamond Burs for the Fabrication of Ceramic Crowns Using Dental CAD/CAM

Cited by 26 publications

References 8 publications

Marginal and Internal Fit of All-ceramic Crowns Fabricated with Two Different CAD/CAM Systems

Marginal and Internal Fit of All-ceramic Crowns Fabricated with Two Different CAD/CAM Systems

Mechanical behavior of non veneered three unit fixed partial dentures of alumina-zirconia Under cyclic load in wet environment

Electrophoretic Deposition Zirconia/Alumina of Ceria-stabilized Zironia/Alumina Powder

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