zirconium/نخر

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Orthopedic implant cobalt-alloy particles produce greater toxicity and inflammatory cytokines than titanium alloy and zirconium alloy-based particles in vitro, in human osteoblasts, fibroblasts, and macrophages.

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The performance of total joint arthroplasty (TJA) depends on the size/shape, material, and amounts of implant debris. Much remains unknown in terms of which types of debris are most reactive. We compared the responses of human periimplant cells, osteoblasts, fibroblasts, and macrophages, exposed to

Interstitial lung granulomas as a possible consequence of exposure to zirconium dust.

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A case of interstitial lung granulomas is described in a worker exposed to zirconium compounds. Chest X-rays revealed diffuse slight reticular interstitial radio-opacities (ILO classification, 1/0 s/t). Histological examination of transbronchial biopsy tissue revealed small interstitial nonconfluent

Extensive Bone Reaction From Catastrophic Oxidized Zirconium Wear.

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The use of alternative bearing surfaces for total hip arthroplasty has become popular to minimize wear and increase longevity, especially in young patients. Oxidized zirconium (Oxinium; Smith & Nephew, Memphis, Tennessee) femoral heads were introduced in the past decade for use in total hip

The effect of diffusion hardened oxidized zirconium wear debris on cell viability and inflammation--an in vitro study.

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Wear debris generation in total joint replacement remains a concern because of its association with aseptic loosening, osteolysis, and ultimately implant failure. In a quest to develop new implant materials with reduced wear and improved biocompatibility a new composition of oxidized Zr2.5Nb alloy;

Analysis of metal ion-induced DNA damage, apoptosis, and necrosis in human (Jurkat) T-cells demonstrates Ni2+ and V3+ are more toxic than other metals: Al3+, Be2+, Co2+, Cr3+, Cu2+, Fe3+, Mo5+, Nb5+, Zr2+.

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It remains unclear how metal released from implants affects cells of the immune system and, in particular, cells of the adaptive immune system, that is, T-helper lymphocytes. In this study, we investigated the effects of aluminum, chromium, cobalt, copper, iron, molybdenum, nickel, niobium,

Hard-on-Hard Bearings Are Associated With Increased Noise Generation in Young Patients Undergoing Hip Arthroplasty.

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BACKGROUND Patient-perceived noise from prostheses after total hip arthroplasty (THA) does occur, yet questions remain including the overall frequency of this finding, demographic and prosthesis-related factors, and the association of noise generation with patient-reported outcomes. OBJECTIVE The

[TNF-alpha secretion by human macrophage-like cells in response to wear particles and its modification by drugs].

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Tumour necrosis factor (TNF) is considered to be the initiator protein of particle disease leading to aseptic loosening of endoprostheses. The aim of the present study was to investigate the TNF response of the macrophage-like cells (MLC) to the periprosthetic particles typically found during

Formation of multinucleate giant cells in organized epitheloid cell granulomas.

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Organized epithelioid cell granulomas were produced experimentally by injecting intradermally dilute suspensions of zirconium and beryllium salts into individuals who had been previously sensitized to these metals. Biopsies were obtained at intervals of between 5 days and 13 months later, and the

[Hyperkalemia as a limiting factor in the use of drugs that block the Renin Angiotensin Aldosterone System (RAAS)].

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Angiotensin-converting enzyme (ACE-I) inhibitors and ARBs have shown real efficacy in reducing blood pressure, proteinuria, in slowing the progression of chronic kidney disease (MRC) and in clinical improvement. in patients with heart failure, diabetes mellitus and ischemic heart disease. However,

The Radiopacity and Antimicrobial Properties of Different Radiopaque Double Antibiotic Pastes Used in Regenerative Endodontics.

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BACKGROUND We evaluated the radiopacity and antibacterial properties of various concentrations of double antibiotic paste (DAP) containing barium sulfate (BaSO4) or zirconium oxide (ZrO2) radiopaque agents. METHODS The radiopacity of 1, 10, and 25 mg/mL DAP containing 30% (w/v) BaSO4 or ZrO2,

[Comparative study of ab-externo sclerostomy with the excimer and Er:YAG laser].

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The specific ablative effect of pulsed 308 nm XeCl-excimer laser radiation (4 mJ 80 Hz) on the tissue has proved its worth in clinical use in glaucoma patients. However, the cytotoxic and mutagenic photochemical reactions induced by intraocular ultraviolet irradiation could theoretically be

Implant Soft-Tissue Attachment Using 3D Oral Mucosal Models-A Pilot Study

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Purpose: The aim of this study was to investigate soft-tissue attachment to different metal, ceramic, and polymer implant surfaces using an inflamed, three-dimensional (3D), tissue-engineered, human oral mucosal model, as well as

The response of osteoblast-like SaOS-2 cells to modified titanium surfaces.

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OBJECTIVE To study the effects of different chemically modified titanium surfaces on the proliferation, differentiation, adhesion, and apoptosis of osteoblast-like SaOS-2 cells. METHODS In this work, six different titanium materials were tested and compared to each other: (1) glazed; (2) unglazed;

Titanium alloys: in vitro biological analyzes on biofilm formation, biocompatibility, cell differentiation to induce bone formation, and immunological response.

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Biological effects of titanium (Ti) alloys were analyzed on biofilms of Candida albicans, Enterococcus faecalis, Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus mutans, and Streptococcus sanguinis, as well as on osteoblast-like cells (MG63) and murine macrophages (RAW 264.7). Standard

Evaluation of a novel radiopacifiying agent on the physical properties of surgical spineplex.

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Polymethlylmethacrylate (PMMA) is the most frequently used cement for percutaneous vertebroplasty and kyphoplasty. To aid visualisation during surgery cements are doped with radiopacifying agents such as Barium sulphate (Ba(2)SO(4)) or Zirconium Dioxide (ZiO(2)). Mounting research suggests that

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