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https://www.readbyqxmd.com/read/28805958/large-orbital-defect-reconstruction-in-the-setting-of-globe-sparing-maxillectomy-the-titanium-hammock-and-layered-fibula-technique
#1
Samuel J Trosman, Timothy M Haffey, Rafael A Couto, Michael A Fritz
INTRODUCTION: The purpose of our study was to describe a novel technique for reconstruction of orbital defects after maxillectomy using a non-anatomic titanium mesh suspension of orbital contents for both support and volume correction. This construct is then articulated with a layered fibula osteocutaneous free flap that restores orbital rim, zygoma, and maxillary alveolus. We herein present our application of this technique, including refinements over time and long-term outcomes. METHODS: A retrospective review was performed on 12 patients who underwent reconstruction of Brown class III orbitopalatomaxillary defects with extensive orbital involvement (at minimum complete orbital floor and rim absent) with titanium mesh sling and a layered fibula free flap...
August 14, 2017: Microsurgery
https://www.readbyqxmd.com/read/28805275/participation-of-extracellular-signal-regulated-kinases-1-2-in-osteoblast-and-adipocyte-differentiation-of-mesenchymal-stem-cells-grown-on-titanium-surfaces
#2
Heitor F Silva, Rodrigo P F Abuna, Helena B Lopes, Marcelo S Francischini, Paulo T de Oliveira, Adalberto L Rosa, Marcio M Beloti
Osteoblasts and adipocytes coexist in the implantation site and affect the process of titanium (Ti) osseointegration. As extracellular signal-regulated kinases 1/2 (ERK1/2) are involved in osteogenesis and adipogenesis, the aim of our study was to investigate if the effects of Ti surface topography on osteoblast and adipocyte differentiation are modulated by ERK1/2. The experiments were conducted based on the effect of the ERK1/2 inhibitor, PD98059, on mesenchymal stem cells (MSCs) grown under osteogenic and adipogenic conditions on Ti with nanotopography (Ti-Nano) or on machined Ti (Ti-Machined)...
August 14, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28801691/a-new-data-processing-routine-facilitating-the-identification-of-surface-adhered-proteins-from-bacterial-conditioning-films-via-qcm-d-maldi-tof-ms
#3
Siegfried Hohmann, Anke Neidig, Boris Kühl, Frank Kirschhöfer, Jörg Overhage, Gerald Brenner-Weiß
Conditioning films are an important factor in the initiation and development of microbial biofilms, which are the leading cause of chronic infections associated with medical devices. Here, we analyzed the protein content of conditioning films formed after exposure to supernatants of cultures of the human pathogen Pseudomonas aeruginosa PAO1. Adhesion of substances from the supernatant was monitored using quartz crystal microbalance with dissipation monitoring (QCM-D) sensor chips modified with the commonly used implant material titanium dioxide (TiO2)...
August 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28800964/the-effect-of-metal-ions-released-from-different-dental-implant-abutment-couples-on-osteoblast-function-and-secretion-of-bone-resorbing-mediators
#4
Ghada O Alrabeah, Peter Brett, Jonathan C Knowles, Haralampos Petridis
OBJECTIVES: The etiology of the reduced marginal bone loss observed around platform-switched implant-abutment connections is not clear but could be related to the release of variable amounts of corrosion products. The present study evaluated the effect of different concentrations of metal ions released from different implant abutment couples on osteoblastic cell viability, apoptosis and expression of genes related to bone resorption. METHODS: Osteoblastic cells were exposed to five conditions of culture media prepared containing metal ions (titanium, aluminum, vanadium, cobalt, chromium and molybdenum) in different concentrations representing the amounts released from platform-matched and platform-switched implant-abutment couples as a result of an earlier accelerated corrosion experiment...
August 4, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28800664/outcomes-of-cranioplasty-with-preformed-titanium-versus-freehand-molded-polymethylmethacrylate-implants
#5
Julius Höhne, Korbinian Werzmirzowsky, Christian Ott, Christoph Hohenberger, Bahaa Ghareb Hassanin, Alexander Brawanski, Karl-Michael Schebesch
No abstract text is available yet for this article.
August 11, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28799523/bactericidal-activity-of-the-ti-13nb-13zr-alloy-against-different-species-of-bacteria-related-with-implant-infection
#6
John-Jairo Aguilera-Correa, Ana Conde, Maria-Angeles Arenas, Juan-Jose de-Damborenea, Miguel Marin, Antonio L Doadrio, Jaime Esteban
The Ti-6Al-4V alloy is one of the most commonly used in orthopedic surgery. Despite its advantages, there is an increasing need to use new titanium alloys with no toxic elements and improved biomechanical properties, such as Ti-13Nb-13Zr. Prosthetic joint infections (PJI) are mainly caused by Gram-positive bacteria; however, Gram-negative bacteria are a growing problem due to associated multidrug resistance. In this study, the bacterial adherence and viability on the Ti-13Nb-13Zr alloy have been compared to that of the Ti-6Al-4V alloy using 16 collection and clinical strains of bacterial species related to PJI: Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, and Pseudomonas aeruginosa...
August 11, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28798929/accuracy-of-bone-measurements-in-the-vicinity-of-titanium-implants-in-cbct-data-sets-a-comparison-of-radiological-and-histological-findings-in-minipigs
#7
Alexander Gröbe, Jan Semmusch, Maximilian Schöllchen, Henning Hanken, Michael Hahn, Wolfgang Eichhorn, Gerhard Schön, Ole Jung, Jamal M Stein, Aline Reitmeier, Max Heiland, Ralf Smeets, Clarissa Precht
PURPOSE: The aim of this animal study was the determination of accuracy of bone measurements in CBCT (cone-beam computed tomography) in close proximity to titanium implants. MATERIAL AND METHODS: Titanium implants were inserted in eight Göttingen minipigs. 60 implants were evaluated histologically in ground section specimen and radiologically in CBCT in regard to thickness of the buccal bone. With random intercept models, the difference of histologic measurements and CBCT measurements of bone thickness was calculated...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28798459/increased-levels-of-dissolved-titanium-are-associated-with-peri-implantitis-a-cross-sectional-study
#8
(no author information available yet)
As this study implicates a role for corrosion in peri-implantitis, there may be a clear distinction between the aetiology of peri-implantitis and periodontitis.
August 11, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28795428/are-metals-involved-in-tattoo-related-hypersensitivity-reactions-a-case-report
#9
Christa de Cuyper, Evelyne Lodewick, Ines Schreiver, Bernhard Hesse, Christian Seim, Hiram Castillo-Michel, Peter Laux, Andreas Luch
BACKGROUND: Allergic reactions to tattoos are not uncommon. However, identification of the culprit allergen(s) remains challenging. OBJECTIVES: We present a patient with papulo-nodular infiltration of 20-year-old tattoos associated with systemic symptoms that disappeared within a week after surgical removal of metal osteosynthesis implants from his spine. We aimed to explore the causal relationship between the metal implants and the patient's clinical presentation...
August 9, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28795083/mechanical-instability-and-titanium-particles-induce-similar-transcriptomic-changes-in-a-rat-model-for-periprosthetic-osteolysis-and-aseptic-loosening
#10
Mehdi Amirhosseini, Göran Andersson, Per Aspenberg, Anna Fahlgren
Wear debris particles released from prosthetic bearing surfaces and mechanical instability of implants are two main causes of periprosthetic osteolysis. While particle-induced loosening has been studied extensively, mechanisms through which mechanical factors lead to implant loosening have been less investigated. This study compares the transcriptional profiles associated with osteolysis in a rat model for aseptic loosening, induced by either mechanical instability or titanium particles. Rats were exposed to mechanical instability or titanium particles...
December 2017: Bone Reports
https://www.readbyqxmd.com/read/28792115/digital-workflow-in-full-arch-implant-rehabilitation-with-segmented-minimally-veneered-monolithic-zirconia-fixed-dental-prostheses-2-year-clinical-follow-up
#11
Panos Papaspyridakos, Kiho Kang, Catherine DeFuria, Sarah Amin, Yukio Kudara, Hans-Peter Weber
OBJECTIVE: To illustrate a digital workflow in full-arch implant rehabilitation with minimally veneered monolithic zirconia and to report the outcomes including technical complications. CLINICAL CONSIDERATIONS: Three patients (5 edentulous arches) received full-arch fixed implant rehabilitation with monolithic zirconia and mild facial porcelain veneering involving a digital workflow. The incisal edges and occluding surface areas were milled out of monolithic zirconia to reduce the possibility of chipping...
August 9, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28791830/zirconium-the-material-of-the-future-in-modern-implantology
#12
REVIEW
Paweł Kubasiewicz-Ross, Marzena Dominiak, Tomasz Gedrange, Ute U Botzenhart
The authors present the contemporary state of knowledge concerning alternative materials for dental implantology. First of all, factors influencing osseointegration are stated. The most important factors seem to be the type of implant surface. Among the numerous parameters describing them, the most important are: average roughness and porous density. Some studies proved that materials with comparable surface roughness provide similar osseointegration. In modern implantology titanium is the material still considered as a "gold standard"...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28791801/one-piece-internal-zirconia-abutments-for-single-tooth-restorations-on-narrow-and-regular-diameter-implants-a-5-year-prospective-follow-up-study
#13
Andrée Nilsson, Lars-Åke Johansson, Christina Lindh, Anders Ekfeldt
BACKGROUND: Studies have reported an increased risk for fractures of zirconia abutments compared with titanium abutments. PURPOSE: The aim of this study was to evaluate single-tooth implant restorations with one-piece yttria-stabilized internal zirconia abutments on narrow and regular diameter implants up to 6 years after insertion. MATERIAL AND METHODS: This study comprises 52 consecutively treated patients, with a median age of 19 years...
August 9, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28791077/bone-morphogenetic-protein-coating-on-titanium-implant-surface-a-systematic-review
#14
REVIEW
Haim Haimov, Natali Yosupov, Ginnady Pinchasov, Gintaras Juodzbalys
OBJECTIVES: The purpose of the study is to systematically review the osseointegration process improvement by bone morphogenetic protein coating on titanium implant surface. MATERIAL AND METHODS: An electronic literature search was conducted through the MEDLINE (PubMed) and EMBASE databases. The search was restricted for articles published during the last 10 years from October 2006 to September 2016 and articles were limited to English language. RESULTS: A total of 41 articles were reviewed, and 8 of the most relevant articles that are suitable to the criteria were selected...
April 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/28790535/morphological-changes-in-blood-cells-after-implantation-of-titanium-and-plastic-clips-in-the-neurocranium-experimental-study-on-dogs
#15
Muhamed Katica, Mirza Celebicic, Nedzad Gradascevic, Muamer Obhodzas, Enra Suljić, Muhamed Ocuz, Samir Delibegovic
INTRODUCTION: Various studies confirm the biocompatibility and efficacy of clips for certain target tissues, but without any comparative analysis of hematological parameters. Therefore, we conducted a study to assess the possible association of the implantation of titanium and plastic clips in the neurocranium with possible morphological changes in the blood cells of experimental animals. MATERIALS AND METHODS: As a control, the peripheral blood smears were taken before surgery from 12 adult dogs that were divided into two experimental groups...
April 2017: Medical Archives
https://www.readbyqxmd.com/read/28790331/3d-printed-personalized-titanium-plates-improve-clinical-outcome-in-microwave-ablation-of-bone-tumors-around-the-knee
#16
Limin Ma, Ye Zhou, Ye Zhu, Zefeng Lin, Lingling Chen, Yu Zhang, Hong Xia, Chuanbin Mao
Microwave ablation has been widely accepted in treating bone tumor. However, its procedure is time-consuming and usually results in postoperative fractures. To solve this problem, we designed and fabricated titanium plates customized to the patients' bone structures. The personalized titanium plates were then used for fixation after the removal of tumorous tissue. Specifically, 3D models of tumor-bearing bone segments were constructed by using computed tomography (CT) and magnetic resonance imaging (MRI). The 3D models were used to design the personalized titanium plates...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783506/nanoscale-silver-depositions-inhibit-microbial-colonization-and-improve-biocompatibility-of-titanium-abutments
#17
Supriya Kheur, Nimisha Singh, Dhananjay Bodas, Jean-Yves Rauch, Shantanu Jambhekar, Mohit Kheur, Jyutika Rajwade
Although titanium dental implants are biocompatible, exhibit excellent corrosion resistance and high mechanical resistance, the material fails in providing resistance to infection because it exhibits poor antimicrobial activity. To address these issues, we deposited silver onto titanium abutments (Grade 5 titanium discs) using direct current (DC) sputtering and assessed the antimicrobial activity and biocompatibility of the modified implant material. Atomic absorption spectrometry and X-ray photoelectron spectroscopy were employed to investigate the concentration and elemental composition of the deposited silver...
July 29, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28782282/the-effect-of-amino-plasma-enhanced-chemical-vapor-deposition-treated-titanium-surface-on-schwann-cells
#18
Jinghui Zhao, Yu Guo, Lan A, Wenjing Luo, Xiaona Wang, Li Fu, Qing Cai, Yanmin Zhou
The surface modification of titanium and its alloys with amino group plasma-enhanced chemical vapor deposition has been proven to enhance the performance of implants on initial osteoblast bioactivity in vitro. However, scarce information on the effect of this kind of surface modification on nerve regeneration exists. In this study, the surface chemistry of pure Ti disks and surface-modified disks was examined using X-ray photoelectron spectroscopy. Cell counting kit 8 assay, 4,6-diamidino-2-phenylindole staining, flow cytometry, and scanning electron microscopy showed that either the p30% or cw+p30% mode-mediated surface significantly promote Schwann cell adhesion without any cytotoxicity compared with the pure Ti surface, and the cw+p30% group showed the best performance on cell adhesion...
August 7, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28781070/immediate-implant-placement-and-complete-mouth-rehabilitation-with-cad-cam-titanium-frameworks-and-cemented-crowns-for-a-patient-with-severe-periodontal-disease-a-clinical-report
#19
Pei Wang, Chunbo Tang, Yi Tang, Yunong Wu
The technique of immediate implantation has been widely used to reduce treatment time and bone loss after extraction. However, immediate implant placement in infected extraction sockets is generally contraindicated. This clinical report describes a treatment protocol for immediate implantation after the extraction of teeth with generalized chronic periodontitis. The technique used for the oral rehabilitation used computer-assisted design and computer-assisted manufacturing (CAD-CAM) titanium frameworks and cemented zirconia crowns...
August 4, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28774129/two-level-micro-to-nanoscale-hierarchical-tio%C3%A2-nanolayers-on-titanium-surface
#20
Elena G Zemtsova, Andrei Yu Arbenin, Ruslan Z Valiev, Evgeny V Orekhov, Valentin G Semenov, Vladimir M Smirnov
Joint replacement is being actively developed within modern orthopedics. One novel material providing fast implantation is bioactive coatings. The synthesis of targeted nanocoatings on metallic nanotitanium surface is reported in this paper. TiO₂-based micro- and nanocoatings were produced by sol-gel synthesis using dip-coating technology with subsequent fast (shock) drying in hot plate mode at 400 °C. As a result of shock drying, the two-level hierarchical TiO₂ nanolayer on the nanotitanium was obtained...
December 13, 2016: Materials
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