Evaluation of the shear bond strength of dental porcelain and the low magnetic susceptibility Zr–14Nb alloy

Kajima, Yuka; Takaichi, Atsushi; Yasue, Tohru; Doi, Hisashi; Takahashi, Hidekazu; Hanawa, Takao; Wakabayashi, Noriyuki

doi:10.1016/j.jmbbm.2015.08.008

Cited by 13 publications

(16 citation statements)

References 43 publications

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“…Recently, from a materials perspective, it is of considerable interest to develop MRI‐compatible alloys based on the elements with lower magnetic susceptibility, and simultaneously to meet the requirements of mechanical properties, corrosion resistance and biocompatibility. Such tissue‐susceptibility matched metals have been reported in several alloy systems including the Cu‐Sn, Au‐Pt‐Nb, Zr‐Mo, Zr‐Nb, Nb‐Ta‐W‐Zr, and Nb‐Ta‐Zr …”

Section: Introductionmentioning

confidence: 59%

MRI compatibility of several early transition metal based alloys and its influencing factors

Zhou

Wang

et al. 2017

J Biomed Mater Res

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Magnetic resonance imaging (MRI) compatibility of three early transition metal (ETM) based alloys was assessed in vitro with agarose gel as a phantom, including Zr-20Nb, near-equiatomic (TiZrNbTa) 90 Mo 10 and Nb-60Ta-2Zr, together with pure tantalum and L605 Co-Cr alloy for comparison. The artifact extent in the MR image was quantitatively characterized according to the maximum area of 2D images and the total volume in reconstructed 3D images with a series of slices under acquisition by fast spin echo (FSE) sequence and gradient echo (GRE) sequence. It was indicated that the artifacts extent of L605 Co-Cr alloy with a higher magnetic susceptibility (v v ) was approximately 3-fold greater than that of the ETM-based alloys with v v in the range of 160-250 ppm. In the ETM group, the MRI compatibility of the materials can be ranked in a sequence of Zr-20Nb, pure tantalum, (TiZrNbTa) 90 Mo 10 and Nb-60Ta-2Zr. In addition, using a rabbit cadaver with the implanted tube specimens as a model for ex vivo assessment, it was confirmed that the artifact severity of Nb60Ta-2Zr alloy is significantly reduced in comparison with the L605 alloy.

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Section: Introductionmentioning

confidence: 59%

MRI compatibility of several early transition metal based alloys and its influencing factors

Zhou

Wang

et al. 2017

J Biomed Mater Res

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“…Those specimens, however, represent only a small proportion of all the specimens tested. Considering previous studies that analyzed the bond between titanium and porcelain, SEM and EDS was used to enable an analysis of the chemical composition and to define the oxide layer 1,18,19) . Point analysis of "known" regions, i.e.…”

Section: Discussionmentioning

confidence: 99%

“…This may mean that contents are recorded that do not actually belong to that particular point 20) . Most studies have images showing titanium oxide from above but a few images have been found showing titanium dioxide in cross-section 19,23) . A comparison has been made with the images in the present study but these analyses are not actually sufficient to provide real answers.…”

Section: Discussionmentioning

confidence: 99%

“…They concluded that preheating treatment did not significantly improve the bond strength and that prolonged preheating even might reduce the bond strength due to extensive oxide layer growth. The decreased bond strength may also be a result of a prolonged preheating treatment as for titanium, which have a highly reactive nature and poor adherent oxide layer 19) . Shear bond strength test with a cross-head speed of 0.5 mm/min was selected and thermocycling was excluded to enable comparisons with a previous study 2) .…”

Section: Discussionmentioning

confidence: 99%

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Cast, milled and EBM-manufactured titanium, differences in porcelain shear bond strength

et al. 2018

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The objectives were to analyze the oxide layer generated between titanium and porcelain during firing and compare it in different manufacturing techniques: cast, milled and EBM-technique. Seventy two specimens were manufactured, subdivided according to surface treatment: time of passivation (P) and no time of passivation (NP) before porcelain firing. Specimens from each group were analyzed with scanning electron microscopy: one only fired once, and one subjected to six firings. Remaining specimens were subjected to shear bond strength test. The EBM-produced NP-group had highest mean value (25.0 MPa) and the milled P-group showed lowest mean value (18.5 MPa) when all factors were compared. No significant difference was detected according to time of passivation. SEM showed consistent and well-defined boundary between the different layers. Time of passivation and impact on oxide growth was not detected. The bond strength of porcelain to milled titanium is lower when compared to cast titanium and EBM-produced titanium.

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“…In recent years, several novel Zr-based alloys-such as Zr-Ti alloys [8,9], Zr-Mo alloys [10][11][12], Zr-Nb alloys [13][14][15][16], and Zr-Ru alloys [17]-were reported as potential candidates for biomedical application. One of these studies reported that a Zr-1Mo alloy showed acceptable strength, high corrosion resistance, and low cytotoxicity in addition to lower magnetic susceptibility as compared to Co-Cr and Ti alloys [10,18].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of a Low Magnetic Zr-1Mo Alloy by Powder Bed Fusion Using a Fiber Laser

Sun

Zhou

Kikuchi

et al. 2017

Metals

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Abstract:A low magnetic Zr-1Mo alloy was fabricated by a powder bed fusion (PBF) process using a fiber laser. The microstructure, surface morphology, and pore distribution of the as-built Zr-1Mo alloy were observed. Its magnetic susceptibility and Vickers hardness were evaluated by magnetic susceptibility balance and a microindentation tester, respectively. The as-built Zr-1Mo alloy mainly consisted of an α phase with an acicular structure. From the processing maps of the surface morphology and pore distribution, open pores on the top surface due to the lack of fusion corresponded to grid-like distributed pores, and large pores corresponded to balling particles on the top surface. The Vickers hardness was influenced by the oxygen and nitrogen contents rather than the porosity. The magnetic susceptibilities of the as-built Zr-1Mo alloy still were one-third those of Ti-6Al-4V and Ti-6Al-7Nb, thus PBF can be applicable to the fabrication process for the low magnetic Zr-1Mo alloy.

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Evaluation of the shear bond strength of dental porcelain and the low magnetic susceptibility Zr–14Nb alloy

Cited by 13 publications

References 43 publications

MRI compatibility of several early transition metal based alloys and its influencing factors

MRI compatibility of several early transition metal based alloys and its influencing factors

Cast, milled and EBM-manufactured titanium, differences in porcelain shear bond strength

Fabrication and Characterization of a Low Magnetic Zr-1Mo Alloy by Powder Bed Fusion Using a Fiber Laser

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