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https://www.readbyqxmd.com/read/28429230/influence-of-implants-surface-properties-on-bone-tissue-formation-in-the-ectopic-osteogenesis-test
#1
S V Nadezhdin, E V Zubareva, Yu E Burda, Yu R Kolobov, M B Ivanov, G V Khramov, A Yu Afanas'ev
We studied the influence of the characteristics of oxide porous coatings on osteogenesis and integration of new bone tissue and titanium implant surface in the ectopic osteogenesis test. Implants with coating with pore size 2-20 μ exhibit better osteogenic and osteoconductive characteristics than implants with homogenous surface and smooth relief (pore size 0.5-5.0 μ). Physical characteristics of the surface of the material along with chemical composition of the coating are essential for the formation of bone tissue and its integration with the implant...
April 21, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28427837/in-vitro-fatigue-tests-and-in-silico-finite-element-analysis-of-dental-implants-with-different-fixture-abutment-joint-types-using-computer-aided-design-models
#2
Satoshi Yamaguchi, Yasufumi Yamanishi, Lucas S Machado, Shuji Matsumoto, Nick Tovar, Paulo G Coelho, Van P Thompson, Satoshi Imazato
PURPOSE: The aim of this study was to evaluate fatigue resistance of dental fixtures with two different fixture-abutment connections by in vitro fatigue testing and in silico three-dimensional finite element analysis (3D FEA) using original computer-aided design (CAD) models. METHODS: Dental implant fixtures with external connection (EX) or internal connection (IN) abutments were fabricated from original CAD models using grade IV titanium and step-stress accelerated life testing was performed...
April 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28421361/erratum-to-a-comparative-study-of-the-bone-contact-to-zirconium-and-titanium-implants-after-8%C3%A2-weeks-of-implantation-in-rabbit-femoral-condyles
#3
Abdullah Aldosari AlFarraj, Anil Sukumaran, Mohammad D Al Amri, Aja Bart Van Oirschot, John A Jansen
No abstract text is available yet for this article.
April 18, 2017: Odontology
https://www.readbyqxmd.com/read/28415556/construction-of-zn-incorporated-multilayer-films-to-promote-osteoblasts-growth-and-reduce-bacterial-adhesion
#4
Peng Liu, Yongchun Zhao, Zhang Yuan, Hongyan Ding, Yan Hu, Weihu Yang, Kaiyong Cai
To improve the biological performance of titanium substrates, a bioactive multilayered structure of chitosan/gelatin pair, containing zinc ions, was constructed via a layer-by-layer self-assembly technique. The successful preparation of zinc ions incorporated multilayer films was demonstrated by scanning electron microscopy, X-ray photoelectron spectroscopy, and contact angle measurements, respectively. The biological behaviors of osteoblasts adhered to modified Ti substrates were investigated in vitro via cytoskeleton observation, cell viability measurement, and alkaline phosphatase activity assay...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415518/antimicrobial-property-cytocompatibility-and-corrosion-resistance-of-zn-doped-zro2-tio2-coatings-on-ti6al4v-implants
#5
Ruoyun Wang, Xiaojing He, Yuee Gao, Xiangyu Zhang, Xiaohong Yao, Bin Tang
Zn-doped ZrO2/TiO2 porous coatings (Zn-ZrO2/TiO2) were prepared on the surface of titanium alloy (Ti6Al4V) by a hybrid approach of magnetron sputtering and micro-arc oxidation (MAO). The microstructures, phase constituents and elemental states of the coating were investigated by scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results demonstrate that the Zn-ZrO2/TiO2 coatings are porous and its thickness is approximately 13μm...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415510/on-the-passive-and-semiconducting-behavior-of-severely-deformed-pure-titanium-in-ringer-s-physiological-solution-at-37%C3%A2-c-a-trial-of-the-point-defect-model
#6
Ghazaleh Ansari, Arash Fattah-Alhosseini
The effects of sever plastic deformation through multi-pass accumulative roll bonding on the passive and semiconducting behavior of pure titanium is evaluated in Ringer's physiological solution at 37°C in the present paper. Produced results by polarization plots and electrochemical impedance spectroscopy measurements revealed a significant advance in the passive response of the nano-grained sample compared to that of the annealed pure titanium. Also, Mott-Schottky test results of the nano-grained pure titanium represented a lower donor density and reduced flat-band potential in the formed passive film in comparison with the annealed sample...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415471/synthesis-and-characterization-of-ti-27-5nb-alloy-made-by-clad%C3%A2-additive-manufacturing-process-for-biomedical-applications
#7
M Fischer, P Laheurte, P Acquier, D Joguet, L Peltier, T Petithory, K Anselme, P Mille
Biocompatible beta-titanium alloys such as Ti-27.5(at.%)Nb are good candidates for implantology and arthroplasty applications as their particular mechanical properties, including low Young's modulus, could significantly reduce the stress-shielding phenomenon usually occurring after surgery. The CLAD® process is a powder blown additive manufacturing process that allows the manufacture of patient specific (i.e. custom) implants. Thus, the use of Ti-27.5(at.%)Nb alloy formed by CLAD® process for biomedical applications as a mean to increase cytocompatibility and mechanical biocompatibility was investigated in this study...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415400/antibacterial-and-cytocompatible-nanotextured-ti-surface-incorporating-silver-via-single-step-hydrothermal-processing
#8
Anu Mohandas, Amit G Krishnan, Raja Biswas, Deepthy Menon, Manitha B Nair
Nanosurface modification of Titanium (Ti) implants and prosthesis is proved to enhance osseointegration at the tissue-implant interface. However, many of these products lack adequate antibacterial capability, which leads to implant loosening. As a curative strategy, in this study, nanotextured Ti substrates embedded with silver nanoparticles were developed through a single step hydrothermal processing in an alkaline medium containing silver nitrate at different concentrations (15, 30 and 75μM). Scanning electron micrographs revealed a non-periodically oriented nanoleafy structure on Ti (TNL) decorated with Ag nanoparticles (nanoAg), which was verified by XPS, XRD and EDS analysis...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415389/antibacterial-osteogenic-and-angiogenic-activities-of-srtio3-nanotubes-embedded-with-ag2o-nanoparticles
#9
Yi Chen, Ang Gao, Long Bai, Yueyue Wang, Xin Wang, Xiangyu Zhang, Xiaobo Huang, Ruiqiang Hang, Bin Tang, Paul K Chu
Biomedical titanium (Ti) implants with good anti-infective, osteogenic, and angiogenic properties are in great demand. SrTiO3 nanotubes (NTs) are embedded with silver oxide (Ag2O) nanoparticles (NPs) (denoted as NT-Sr-Ag) by a hydrothermal treatment of TiO2 NTs containing Ag2O NPs (denoted as NT-Ag) in a Sr(OH)2 solution. The morphology, composition, microstructure, ion release phenomenon, as well as antibacterial, osteogenic, and angiogenic activities are investigated in details. During the hydrothermal treatment, the amorphous TiO2 in the NTs morphs into cubic SrTiO3 gradually and the ordered nanotubular architecture is preserved...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28410571/pre-and-post-surgical-evaluation-of-the-inflammatory-response-in-patients-with-aortic-stenosis-treated-with-different-types-of-prosthesis
#10
Maria Elena Soto, Jose Luis Salas, Jesus Vargas-Barron, Ricardo Marquez, Alejandra Rodriguez-Hernandez, Rafael Bojalil-Parra, Israel Pérez-Torres, Veronica Guarner-Lans
BACKGROUND: The inflammatory process in aortic valvular stenosis persists after surgery to replace the valve in almost half of the patients. No association has been found to its persistence. The main objective of this study was to evaluate the inflammatory response in patients with aortic stenosis through the determination of several biomarkers in plasma measured before and after the valvular replacement and to seek an association with the type of prosthesis used. METHODS: This is an observational study with a follow up of 6 months in subjects with severe aortic stenosis...
April 14, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28408533/brachytherapy-with-intratumoral-injections-of-radiometal-labeled-polymers-that-thermo-responsively-self-aggregate-in-tumor-tissues
#11
Kohei Sano, Yuko Kanada, Kengo Kanazaki, Ning Ding, Masahiro Ono, Hideo Saji
Brachytherapy is a type of radiotherapy wherein titanium capsules containing therapeutic radioisotopes are implanted within tumor tissues, enabling high-dose radio-irradiation to tumor tissues around the seeds. Although marked therapeutic effects have been demonstrated, brachytherapy needs complicated implantation technique under general anesthesia and the seeds could migrate to other organs. The aim of this study is to establish a novel brachytherapy using biocompatible, injectable thermo-responsive polymers (polyoxazoline; POZ) labeled with yttrium-90 ((90)Y), which can self-aggregate above a specific transition temperature, resulting in long-term intratumoral retention of radioactivity and therapeutic effect...
April 13, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28408260/evaluation-of-bioabsorbable-multiamino-acid-copolymer-nano-hydroxyapatite-calcium-sulphate-cage-in-a-goat-spine-model
#12
Chunpeng Ren, Yueming Song, Youdi Xue, Xi Yang, Chunguang Zhou
BACKGROUND: Recently, polylactide is the most popular material used to made bioabsorbable cages, but too fast degradation and osteolysis around the cage have been reported in the literature. This study evaluated the fusion effect, biomechanical stability and histological characteristics of a novel bioabsorbable multi-amino acid copolymer/nano-hydroxyapatite/calcium sulphate (MAACP/n-HA/CS) interbody cage in a goat model of anterior cervical discectomy and fusion (ACDF). METHODS: A total of 24 goats underwent C3/C4 discectomy and fusion with three groups of intervertebral implants: MAACP/n-HA/CS cage group (n = 8), titanium cage group (n = 8) and autologous tricortical iliac crest bone group (n = 8)...
April 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28407019/comparison-between-titanium-mesh-and-autogenous-iliac-bone-graft-to-restore-vertebral-height-through-posterior-approach-for-the-treatment-of-thoracic-and-lumbar-spinal-tuberculosis
#13
COMPARATIVE STUDY
Yongjian Gao, Yunsheng Ou, Qianxing Deng, Bin He, Xing Du, Jianxiao Li
OBJECT: To compare the clinical efficacy of titanium mesh cages and autogenous iliac bone graft to restore vertebral height through posterior approach in patients with thoracic and lumbar spinal tuberculosis. METHOD: 59 patients with spinal tuberculosis underwent interbody fusion and internal fixation through posterior approach in our department from January 2011 to December 2013. In group A, 34 patients obtained titanium mesh for the reconstruction of vertebral height, among them 25 patients (group A1) suffered from single-segment spinal tuberculosis, and 9 patients, (group A2) had multi-segment spinal tuberculosis...
2017: PloS One
https://www.readbyqxmd.com/read/28406881/early-healing-evaluation-of-commercially-pure-titanium-and-ti-6al-4v-presenting-similar-surface-texture-an-in-vivo-study
#14
Arthur Castellano, Luiz F Gil, Estevam A Bonfante, Nick Tovar, Rodrigo Neiva, Malvin N Janal, Paulo G Coelho
OBJECTIVE: This study evaluated the osseointegration of commercially pure titanium (Ti) grade-2 (G2) and Ti-6Al-4V alloy (G5) implants with the same geometry and surface treatment. MATERIALS AND METHODS: Thirty-six dental implants with a grit-blasted acid-etched surface were used (n = 18, each). Two implants, one per group, were installed in each subject, in the radius diaphysis (n = 18 beagle dogs), with interchanged fixture position (proximal-distal) between animals for a balanced number of devices per group and time in vivo (1, 3, and 6 weeks)...
April 12, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28406458/behavior-of-human-osteoblast-cells-cultured-on-titanium-discs-in-relation-to-surface-roughness-and-presence-of-melatonin
#15
M Fernanda Sola-Ruiz, Carolina Perez-Martinez, Carlos Labaig-Rueda, Carmen Carda, J Javier Martín De Llano
The aim of this work was to observe the behavior of osteoblast cells cultured in vitro on titanium discs in relation to disc surface roughness and the addition of melatonin to the culture medium. MG63 osteoblast cells were cultivated on 120 Grade 5 Ti divided into three groups: Group E, treated with dual acid etch; Group EP, treated with dual acid etch and calcium phosphate; and Group M, machined. Surface roughness was examined under a laser scanning confocal microscope (CLSM) and scanning electron microscopy (SEM)...
April 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28405263/direct-contact-low-frequency-ultrasound-clearance-of-biofilm-from-metallic-implant-materials
#16
Mark S Granick, Chaitra Paribathan, Mayilvahanan Shanmugam, Narayanan Ramasubbu
Introduction: Biofilms are recognized as a significant deterrent to wound healing and to the management of exposed or infected surgical implants. Biofilms can be disrupted by a variety of enzymatic and mechanical interventions. This experiment was designed to determine whether direct-contact low-frequency ultrasound has the ability to clear biofilms and what then happens to the released bacteria. Methods:Staphylococcus epidermidis biofilm was grown on the surfaces of metallic discs composed of titanium and stainless steel, comparable with the alloys used in surgical implants...
2017: Eplasty
https://www.readbyqxmd.com/read/28403102/mandibular-regeneration-after-immediate-load-dental-implant-in-a-periodontitis-patient-a-clinical-and-ultrastructural-case-report
#17
Maurizio Catinari, Manuel Scimeca, Massimo Amorosino, Mario Marini, Elena Bonanno, Virginia Tancredi
RATIONALE: In this case study, we characterized from radiographic, morphological and elemental point of view the mandibular reconstruction that occur in patients affects by periodontitis after application of endosseous titanium implants. In particular, we verified that the bone load applied by titanium implant was able to induce the mandibular osteogenic reconstruction. PATIENT CONCERN: A 57-year-old female active smoker with no contraindications for dental implants and 3 unstable dental prostheses, underwent open surgery for the application of endosseous titanium implants (BANP IMPLANT S...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28402679/inhibition-of-osteogenesis-surrounding-the-titanium-implant-by-cgrp-deficiency
#18
Yao Liu, Guangsen Zheng, Li Liu, Zhi Wang, Yiyao Wang, Qianming Chen, En Luo
Previous studies have suggested one of neurotransmitters, calcitonin gene-related peptide (CGRP), modulates local regulation of bone metabolism; however, the regulating signaling pathway is still being explored. The objective of this study was to determine whether CGRP deficiency affects the osteogenesis surrounding titanium implants in vivo. Titanium screws were implanted in 72 adult rats, which were divided into three groups randomly: Sham, inferior alveolar neurectomy (IAN), and IAN+CGRP. Saline solution containing CGRP (concentration: 100 nmol/L) was injected into the area surrounding the implants in the IAN+CGRP group every day post operation...
April 12, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28402357/immediate-functional-loading-of-one-piece-zirconia-implants-in-a-full-arch-maxillary-restoration-a-five-year-case-report
#19
Burghard Peter
Immediate loading has proven to be a predictable modality for restorations with titanium dental implants. An increasing number of articles indicate that zirconia implants might osseointegrate to a similar extent in this context. This 5-year case report describes an outpatient maxillary restoration with eight immediately loaded zirconia implants. Implantation followed extensive bone augmentation. At the 5-year follow-up, all implants were still well osseointegrated clinically and radiologically. No major bone loss or peri-implantitis had occurred in spite of temporary insufficient patient compliance...
May 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28402355/digitally-milled-metal-framework-for-fixed-complete-denture-with-metal-occlusal-surfaces-a-design-concept
#20
Bader AlBader, Abdulaziz AlHelal, Periklis Proussaefs, Antonela Garbacea, Mathew T Kattadiyil, Jaime Lozada
Implant-supported fixed complete dentures, often referred to as hybrid prostheses, have been associated with high implant survival rates but also with a high incidence of mechanical prosthetic complications. The most frequent of these complications have been fracture and wear of the veneering material. The proposed design concept incorporates the occlusal surfaces of the posterior teeth as part of a digital milled metal framework by designing the posterior first molars in full contour as part of the framework...
May 2017: International Journal of Periodontics & Restorative Dentistry
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