A 3-year follow-up of ceria-stabilized zirconia/alumina nanocomposite (Ce-TZP/A) frameworks for fixed dental prostheses

Tanaka, Shinpei; Takaba, Masayuki; Ishiura, Yuichi; Kamimura, Emi; Baba, Kazuyoshi

doi:10.1016/j.jpor.2014.11.006

Cited by 30 publications

(15 citation statements)

References 24 publications

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“…A zirconia/alumina nanocomposite stabilized with cerium oxide (Ce-TZP/A) was developed to overcome this flaw. Ce-TZP/A has desirable mechanical qualities, and compared to Y-TZP, it has superior thermal stability and toughness, therefore it is in the spotlight as a new material candidate 11,12) . This material has an interpenetrated intragranular nanostructure, in which either nanometer-sized Ce-TZP or Al 2O3 particles locate within submicron-sized Al2O3 or Ce-TZP grains, respectively.…”

Section: Introductionmentioning

confidence: 99%

Effects of taper and space settings of telescopic Ce-TZP/A crowns on retentive force and settling

2017

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The aim of this study was to investigate the effect of the taper and space setting of using Ce-TZP/A on retentive force and secondary crown settling. The taper were 2°, 4°, and 6°, and the space settings were 0 and 10 μm. The applied loads were 50 and 100 N. The taper had a significant effect on retentive force and settling at both loads (p<0.05). The space settings did not have a significant effect on retentive force or settling at either load (p<0.05). The taper of the telescopic crowns and the load affected the retentive force and the settling.

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Section: Introductionmentioning

confidence: 99%

Effects of taper and space settings of telescopic Ce-TZP/A crowns on retentive force and settling

2017

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“…Moreover, Ce-TZP/A frameworks exhibit superior fracture strength compared to Y-TZP [8], thus permitting a reduction of framework thickness. In a short-term clinical observation, Ce-TZP/A-based FPDs with a lingual supporting structure showed sufficient stability [31]. However, even if the lingual supporting structure withstands occlusal forces in the lingual side, the buccal cusp which has no corresponding support is likely to develop chipping.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Framework Designs on the Fracture Properties of Ceria-Stabilized Tetragonal Zirconia/Alumina-Based All-Ceramic Crowns

Sawada¹,

Spintzyk²,

Schille³

et al. 2016

Materials

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The aim of this study was to evaluate the fracture load and failure mode of all-ceramic crowns with different ceria-stabilized tetragonal zirconia/alumina nanocomposite (Ce-TZP/A) framework designs. Four frameworks (anatomical shape: AS, with a buccal or lingual supporting structure: BS and LS, or buccal and lingual supporting structures: BLS) were fabricated. All frameworks were veneered with porcelain to fabricate all-ceramic crowns followed by cementation to tooth analogs. The fracture load of each crown either without or with pre-loading (1.2 million cycles, 49 N) was measured. The failure mode was classified into partial or complete fracture. Differences were tested for significance (p < 0.05) by a two-way Analysis of Variance (ANOVA), followed by Tukey’s test and by Fisher’s exact test, respectively. Without pre-loading, supporting structures did not influence the fracture load or failure mode. Partial fractures were the most common failure mode. Pre-loading promoted the severity of the failure mode, although the fracture load among the framework designs was not influenced. In the AS group, prefailures were observed during pre-loading, and complete fractures were significantly increased after pre-loading. In contrast, the failure mode of the BLS group remained unchanged, showing only partial fracture even after pre-loading. This Ce-TZP/A framework design, comprised of an anatomical shape with additional buccal and lingual structures, has the potential to reduce the chipping of the veneering porcelain.

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“…All‐ceramic restorations have been widely applied in prosthodontics as metal‐free restorations because of their good esthetics, excellent biocompatibility, and inert properties . However, fractures remain a complication for all‐ceramic restorations in clinical practice .…”

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confidence: 99%

Effect of finish line design on stress distribution in bilayer and monolithic zirconia crowns: a three‐dimensional finite element analysis study

Miura

Kasahara

Yamauchi

et al. 2018

European J Oral Sciences

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This study evaluated the influence of different finish line designs and abutment materials on the stress distribution of bilayer and monolithic zirconia crowns using three-dimensional finite element analysis (FEA). Three-dimensional models of two types of zirconia premolars - a yttria-stabilized zirconia framework with veneering ceramic and a monolithic zirconia ceramic - were used in the analysis. Cylindrical models with the finish line design of the crown abutments were prepared with three types of margin curvature radius (CR): CR = 0 (CR0; shoulder margin), CR = 0.5 (CR0.5; rounded shoulder margin), and CR = 1.0 (CR1.0; deep chamfer margin). Two abutment materials (dentin and brass) were analyzed. In the FEA model, 1 N was loaded perpendicular to the occlusal surface at the center of the crown, and linear static analysis was performed. For all crowns, stress was localized to the occlusal loading area as well as to the axial walls of the proximal region. The lowest maximum principal stress values were observed when the dentin abutment with CR0.5 was used under a monolithic zirconia crown. These results suggest that the rounded shoulder margin and deep chamfer margin, in combination with a monolithic zirconia crown, potentially have optimal geometry to minimize occlusal stress.

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A 3-year follow-up of ceria-stabilized zirconia/alumina nanocomposite (Ce-TZP/A) frameworks for fixed dental prostheses

Cited by 30 publications

References 24 publications

Effects of taper and space settings of telescopic Ce-TZP/A crowns on retentive force and settling

Effects of taper and space settings of telescopic Ce-TZP/A crowns on retentive force and settling

Influence of Different Framework Designs on the Fracture Properties of Ceria-Stabilized Tetragonal Zirconia/Alumina-Based All-Ceramic Crowns

Effect of finish line design on stress distribution in bilayer and monolithic zirconia crowns: a three‐dimensional finite element analysis study

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