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  • 1
    In: Journal of Orthopaedic Research, Wiley, Vol. 39, No. 4 ( 2021-04), p. 813-820
    Abstract: Cementing metallic liners into well‐fixed acetabular shells facilitates utilizing dual‐mobility cups in revision total hip arthroplasty without shell replacement. The current biomechanical study investigated the effect of increasing cemented liner (a) inclination; and (b) offset on the cement retention strength measured as the lever‐out moment at cement failure. Eighteen metallic liner prototypes were cemented into cluster‐hole acetabular shells at variable inclinations (0°, 10°, and 20°) and offsets (0 and 10 mm) relative to the enclosing acetabular shell (6 groups; n = 3 constructs per group). The constructs were connected to a material testing frame, and lever‐out failure moments were tested through an established protocol. Failure occurred at the liner‐cement interface (18/18). There was no correlation between liner inclination and the lever‐out failure moment ( r  = −0.327, P  = .185). Liner offset demonstrated a strong negative correlation to mean lever‐out failure moments ( r  = −0.788, P   〈  .001). There was no significant difference between mean lever‐out failure moments at variable liner inclinations, regardless of offset ( P  = .358). Greater liner offset was associated with diminished mean lever‐out failure moments ( P   〈  .001). Compared with neutral (0° inclination, 0 mm offset), the maximum inclination and offset group had the lowest mean lever‐out failure moment ( P  = .011). Cemented metal‐in‐metal constructs are significantly affected by the liner positioning. While a correlation between liner inclination and cement retention strength could not be asserted, cement retention strength is significantly diminished by increased liner offset.
    Type of Medium: Online Resource
    ISSN: 0736-0266 , 1554-527X
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2050452-4
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2021
    In:  The International Journal of Medical Robotics and Computer Assisted Surgery Vol. 17, No. 6 ( 2021-12)
    In: The International Journal of Medical Robotics and Computer Assisted Surgery, Wiley, Vol. 17, No. 6 ( 2021-12)
    Abstract: We systematically reviewed the radiological outcomes of studies comparing robotic‐assisted (RA‐THA) and manual total hip arthroplasty (mTHA). Methods The PubMed, Embase, and Cochrane databases were queried from 1994‐2021 for articles comparing radiographic outcomes between RA‐THA and mTHA cohorts. A meta‐analysis was conducted whenever sufficient data was present for common outcomes. Results Our analysis included 20 articles reporting on 4140 patients (RA‐THA: n  = 1228; mTHA: n  = 2912). No differences were demonstrated for acetabular inclination or anteversion. However, RA‐THA demonstrated higher rates of cup orientation within the Lewinnek and Callanan safe zones, improved femoral stem alignment, and lower global offset difference (GOD) and limb length discrepancy (all p ‐values 〈 0.05). Superior femoral canal fill and combined offset were seen among RA‐THA patients. Conclusion Our review found that the use of RA‐THA yields superior radiographic outcomes compared to mTHA counterparts. This information can inform healthcare systems considering investing in and implementing these technologies.
    Type of Medium: Online Resource
    ISSN: 1478-5951 , 1478-596X
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2156187-4
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  • 3
    In: Electrochemical Science Advances, Wiley, Vol. 1, No. 1 ( 2021-02)
    Abstract: We report on the fine tuning of sputtered gold nanoparticles (Au NPs) with optimized diameters (7–25 nm) and distribution on the high surface area titania nanotube arrays (TNTs). The uniform coverage of Au NPs both outside and inside the nanotube arrays was possible by adjusting the sputtering current, as confirmed via scanning electron microscopy imaging and X‐ray diffraction analysis. Decorating the TNTs with Au NPs extended their optical activity to the visible region of the light spectrum. This red shift was attributed to the localized surface plasmon resonance (LSPR) of Au NPs as verified computationally and experimentally. The Au–TiO 2 composites demonstrated 86% increase in the photocurrent compared to the bare TNTs upon their use as photoanodes for water splitting. The photoactivity was found to depend on the size of the sputtered Au NPs. The photocurrent transient measurements under light on/off conditions revealed the photostability of the Au–TiO 2 nanocomposites. The Mott–Schottky analysis showed a negative shift in the flat band position of the Au–TiO 2 electrodes with increased donor density compared to the bare TNTs. Moreover, the Au–TiO 2 showed lower space charge capacitance and longer life time of charge carriers.
    Type of Medium: Online Resource
    ISSN: 2698-5977 , 2698-5977
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2984616-X
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  • 4
    In: Applied Organometallic Chemistry, Wiley, Vol. 36, No. 5 ( 2022-05)
    Abstract: A series of biologically active metal complexes was yielded from the reactions of 2‐(4‐bromophenylamino)acetohydrazide ligand (HL) with Co(II), Ni(II), Cu(II), Cd(II) chlorides, CuBr 2 , Cu(CH 3 COO) 2 , and Cu(ClO 4 ) 2 salts. The structure and stereochemistry of the afforded complexes were elucidated by means of elemental analyses, molar conductance, magnetic susceptibility, thermal analyses (TG/DTG), and spectral techniques (mass, IR, UV‐Vis, and 1 H NMR). Elemental analyses along with molar conductance data demonstrated that all metal complexes are nonelectrolyte and were formed with 1L:1M, 1L:2M, and 2L:1M stoichiometry. IR spectral data provided an evidence for the neutral bidentate behavior of the hydrazide ligand toward metal ions via carbonyl oxygen and amino nitrogen atoms (ON donor). Magnetic susceptibility along with electronic absorption spectral results authenticated that all complexes have an octahedral geometry except, CuCl 2 complex (3) , which possessed a square planar one. The hydrazide ligand and some of its synthesized metal complexes were screened in vitro for their antitumor and apoptotic activity. The results showed that CuBr 2 complex (4) has promising anticancer activities against breast MCF7, liver HepG2, and colorectal HCT 116 cancerous cells through induction of proapoptotic gene (Bax) and inhibit the antiapoptotic gene (Bcl‐2), thus increase the Bax/Bcl‐2 ratio. Moreover, these newly synthesized compounds were most potent and can be used as a therapeutic chemoprevention against these cancerous cells compared with doxorubicin (DOX), the currently available anticancer drug against solid tumors.
    Type of Medium: Online Resource
    ISSN: 0268-2605 , 1099-0739
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1480791-9
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  • 5
    In: Structural Concrete, Wiley
    Abstract: This research studies shear strengthening performance for Normal Concrete (NC) beams employing Engineered Cementitious Composite (ECC) reinforced with Galvanized Welded Wire Mesh (GWWM) in conjunction with/without a prestressing system. Six full‐scale Reinforced Concrete (RC) beams were experimented under static monotonic loading at critical shear span zone up to collapse. The investigated factors were: the type and technique of strengthening, materials used for strengthening, and size and configuration of shear reinforcement. Two techniques were introduced: ECC layer reinforced with GWWM and pretensioned steel bars recovered by ECC with one GWWM. GWWM with and without pretensioned steel bars were delivered as shear reinforcement for strengthening. Vertical and inclined steel bars were the two configurations selected for the prestressing technique for suppressing shear stress. The study was discussed through the experimented beams' crack load and pattern, collapse mode, elastic stiffness, absorbed energy, initial cracking load, and ultimate load, along with the corresponding defection. Experimental results showed that both exploited techniques could govern crack patterns, enhance the failure mode, and upgrade ultimate loading capacity up to 52%. Finite element models were built up, simulating those strengthened with an ECC covering layer augmented with GWWM extracting a model with an error of about 3%.
    Type of Medium: Online Resource
    ISSN: 1464-4177 , 1751-7648
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 2037313-2
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