Fracture loads of screw-retained implant-supported zirconia prostheses after thermal and mechanical stress

Honda, Junichi; Komine, Futoshi; Kusaba, Kosuke; Kitani, Jin; Matsushima, Keisuke; Matsumura, Hideo

doi:10.1016/j.jpor.2019.09.003

Cited by 9 publications

(13 citation statements)

References 24 publications

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“…Thus, the weakest link of bi-layered ISSC is confirmed to be the veneer, while both frameworks showed no fractures or cracks during SLF. These observations are in line with the aforementioned in vitro studies [27,42].…”

Section: Discussionsupporting

confidence: 90%

“…Two in vitro studies, which investigated the failure load of bi-layer and monolithic zirconia based ISSC molar restorations, recorded comparable fracture loads to the present study for PFZ before (1960 N) [41] and after fatigue (1520 N, 1.2 million cycles, 49 N, 10 k thermal cycles) [42]. However, PFM (G-96h, Kuraray Noritake) implant crowns performed inferior compared to the present study, both before (1450 N) [41] and after thermomechanical loading (1530 kN) [42].…”

Section: Discussionsupporting

confidence: 79%

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Mechanical Stability of Screw-Retained Monolithic and Bi-layer Posterior Hybrid Abutment Crowns after Thermomechanical Loading: An In Vitro Study

et al. 2021

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To evaluate the failure-load and survival-rate of screw-retained monolithic and bi-layered crowns bonded to titanium-bases before and after mouth-motion fatigue, 72 titanium-implants (SICvantage-max, SIC-invent-AG) were restored with three groups (n = 24) of screw-retained CAD/CAM implant-supported-single-crowns (ISSC) bonded to titanium-bases: porcelain-fused-to-metal (PFM-control), porcelain-fused-to-zirconia (PFZ-test) and monolithic LDS (LDS-test). Half of the specimens (n = 12/group) were subjected to fatigue in a chewing-simulator (1.2 million cycles, 198 N, 1.67 Hz, thermocycling 5–55 °C). All samples were exposed to single-load-to-failure without (PFM0, PFZ0, LDS0) or with fatigue (PFM1, PFZ1, LDS1). Comparisons were statistically analyzed with t-tests and regression-models and corrected for multiple-testing using the Student–Neuman–Keuls method. All PFM and LDS crowns survived fatigue exposure, whereas 16.7% of PFZ showed chipping failures. The mean failure-loads (±SD) were: PFM0: 2633 ± 389 N, PFM1: 2349 ± 578 N, PFZ0: 2152 ± 572 N, PFZ1: 1686 ± 691 N, LDS0: 2981 ± 798 N, LDS1: 2722 ± 497 N. Fatigue did not influence load to failure of any group. PFZ ISSC showed significantly lower failure-loads than monolithic-LDS regardless of artificial aging (p < 0.05). PFM ISSC showed significantly higher failure loads after fatigue than PFZ (p = 0.032). All ISSC failed in a range above physiological chewing forces. Premature chipping fractures might occur in PFZ ISSC. Monolithic-LDS ISSC showed high reliability as an all-ceramic material for screw-retained posterior hybrid-abutment-crowns.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 79%

Mechanical Stability of Screw-Retained Monolithic and Bi-layer Posterior Hybrid Abutment Crowns after Thermomechanical Loading: An In Vitro Study

et al. 2021

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“…The durability of screw-cemented implant-supported restorations is critical for the long-term success of these restorations [1]. Implant-supported restorations can be fixed by cement-or screw-retaining restorations on the implant abutments.…”

Section: Introductionmentioning

confidence: 99%

The effect of aging on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restorations

2022

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Structural durability of screw-cement-retained implant-supported zirconia-based restorations is an important factor in choosing the best type of restoration for clinical use. This study aimed to evaluate the effects of thermocycling on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restoration. Two experimental groups (monolithic zirconia and porcelain-veneered zirconia) and a control group of porcelain-fused-to-metal restorations were fabricated via CAD-CAM (n = 14 per group). Half of the specimens of each group (n = 7) were subjected to 10000 thermal cycles. The compressive force was applied and the force leading to fracture was measured by using a Universal Testing Machine. The fractured modes were classified under a scanning electron microscope. The data were analyzed through two-way ANOVA, one-way ANOVA, and independent samples t-test (α = 0.05). Among the non-thermocycled subgroups, the monolithic zirconia specimens were significantly more fracture-resistant than the porcelain-veneered zirconia and porcelain-fused-to-metal groups (P<0.05); but it was not the same with aging (P>0.05). Thermocycling decreased the fracture resistance of all groups; however, the difference was not statistically significant (P<0.05). The monolithic zirconia presented higher fracture resistance than the bilayered restorations for screw-cement retained implant-supported restorations. Thermocycling decreased the fracture resistance of all types of restorations insignificantly which can be clinically important.

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“…However, composite resins have drawbacks, such as their low wear resistance 12) , low fracture resistance 13) , discoloration 14) , and facilitated plaque accumulation 15) . Resin-veneered restorations with zirconia frameworks have been introduced, and favorable results have been achieved with regard to the fracture resistance 16,17) and the bond strength of the veneering composite resin to zirconia frameworks 18,19) .…”

Section: Introductionmentioning

confidence: 99%

Bond strength between a veneering composite resin and zirconia frameworks with attached mechanical retentive devices

et al. 2022

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The effects of mechanical retentive devices and various surface treatments on the shear bond strength between a veneering composite resin and zirconia was investigated. Zirconia disks were classified into three surface-treatment groups: airborne-particle abrasion, overglazing, and overglazing with white alumina particles of three different grain sizes (50, 70, and 105 μm) attached onto zirconia disks (ZR-50, ZR-70, and ZR-105, respectively). They were further divided into four groups (n=44): unprimed, Clearfil Porcelain Bond Activator (CA), Clearfil Photo Bond (CB), and CA+CB. An indirect composite resin was bonded to zirconia specimens. Shear bond strengths were measured. For the ZR-70 and ZR-105 groups, the CB and CA+CB specimens exhibited higher bond strengths than the other two specimens after thermocycling. The ZR-70 and ZR-105 groups achieved micromechanical interlocking, and priming with a phosphate monomer (MDP) yielded stable bond strengths between the composite resin and zirconia with alumina particles attached as retentive devices.

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Fracture loads of screw-retained implant-supported zirconia prostheses after thermal and mechanical stress

Cited by 9 publications

References 24 publications

Mechanical Stability of Screw-Retained Monolithic and Bi-layer Posterior Hybrid Abutment Crowns after Thermomechanical Loading: An In Vitro Study

Mechanical Stability of Screw-Retained Monolithic and Bi-layer Posterior Hybrid Abutment Crowns after Thermomechanical Loading: An In Vitro Study

The effect of aging on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restorations

Bond strength between a veneering composite resin and zirconia frameworks with attached mechanical retentive devices

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