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https://www.readbyqxmd.com/read/28532065/in-vitro-performance-of-ag-incorporated-hydroxyapatite-and-its-adhesive-porous-coatings-deposited-by-electrostatic-spraying
#1
Ozkan Gokcekaya, Thomas J Webster, Kyosuke Ueda, Takayuki Narushima, Celaletdin Ergun
Bacterial infection of implanted materials is a significant complication that might require additional surgical operations for implant retrieval. As an antibacterial biomaterial, Ag-containing hydroxyapatite (HA) may be a solution to reduce the incidences of implant associated infections. In this study, pure, 0.2mol% and 0.3mol% Ag incorporated HA powders were synthesized via a precipitation method. Colloidal precursor dispersions prepared from these powders were used to deposit porous coatings onto titanium and stainless steel substrates via electrostatic spraying...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532004/corrosion-and-surface-modification-on-biocompatible-metals-a-review
#2
REVIEW
R I M Asri, W S W Harun, M Samykano, N A C Lah, S A C Ghani, F Tarlochan, M R Raza
Corrosion prevention in biomaterials has become crucial particularly to overcome inflammation and allergic reactions caused by the biomaterials' implants towards the human body. When these metal implants contacted with fluidic environments such as bloodstream and tissue of the body, most of them became mutually highly antagonistic and subsequently promotes corrosion. Biocompatible implants are typically made up of metallic, ceramic, composite and polymers. The present paper specifically focuses on biocompatible metals which favorably used as implants such as 316L stainless steel, cobalt-chromium-molybdenum, pure titanium and titanium-based alloys...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531984/bioactive-materials-driven-primary-stability-on-titanium-biocomposites
#3
T A Dantas, C S Abreu, M M Costa, G Miranda, F S Silva, N Dourado, J R Gomes
The Ti6Al4V alloy constitutes an alternative choice to the most common metal-polymer solutions for total hip arthroplasty (THA) due to good biocompatibility, optimal mechanical properties and high load bearing capacity. However, as Ti6Al4V is not bioactive in its conventional form, hydroxyapatite (HAp) and tricalcium phosphate (TCP) have been widely used as coatings of metal prostheses due to their osteogenic properties and ability to form strong bonds with bone tissue. A promising approach consists in creating a bioactive surface metal matrix composite Ti6Al4V+β-TCP or Ti6Al4V+HAp, obtained by hot pressing (HP) of powders...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531876/photofunctionalization-of-dental-zirconia-oxide-surface-modification-to-improve-bio-integration-preserving-crystal-stability
#4
Marco Roy, Alfonso Pompella, Jerzy Kubacki, Adam Piosik, Bronisław Psiuk, Joanna Klimontko, Jacek Szade, Robert A Roy, Wieslaw Hedzelek
The use of zirconium oxide in dental implantology is rapidly increasing as it is regarded as being more aesthetical and biologically friendly than titanium oxide. The interaction of titanium oxide with cells and proteins has proven to be significantly affected by the inevitable atmospheric hydrocarbon contamination, defined as biological ageing. The latter has proven to be effectively reversed by UVC irradiation. Crystal structures of both Zr and Ti oxides are very similar, thus also ZrO2 is prone to contamination by hydrocarbons...
May 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28530217/-phonosurgical-methods-of-treatment-in-unilateral-vocal-folds-paralysis
#5
REVIEW
Bozena Kosztyła-Hojna, Greta Berger, Maciej Zdrojkowski
Glottal insufficiency (GI) is a cause of breathy voice that can profoundly affect quality of voice. Main causes are unilateral vocal fold paralysis or endoscopic cordectomy for the early treatment of laryngeal cancer of the glottis. The main strategy in surgical treatment is type I medialization thyroplasty according to Isshiki with the use of implants e.g. silastic, hydroxyapatite, titanium, Gore-Tex or Montgomery. Other procedures are arytenoid adduction, the injection laryngoplasty via thyrohyoid and cricothyroid approach and laryngeal reinnervation...
April 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28529660/biomechanical-considerations-in-slipped-capital-femoral-epiphysis-and-insights-into-prophylactic-fixation
#6
E Leblanc, J M Bellemore, T Cheng, D G Little, O Birke
PURPOSE: Slipped capital femoral epiphysis (SCFE) is a deformity of the proximal femur secondary to widened and unstable physis. In stabilising the slip, gold standard treatments stop growth and involve premature physeal closure, which prevents the remodelling of the acquired deformity and creates a leg length discrepancy that may be significant in younger patients. METHODS: We measured the impact of placing threaded screws across the proximal femoral physis by measuring the centre-trochanteric distance (CTD) and articulo-trochanteric distance (ATD) in participants with or without prophylactic fixation...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28528349/high-wear-resistance-of-femoral-components-coated-with-titanium-nitride-a-retrieval-analysis
#7
Christian Fabry, Carmen Zietz, Axel Baumann, Reinhard Ehall, Rainer Bader
PURPOSE: The objective of this study was to evaluate the in vivo wear resistance of cobalt-chromium femoral components coated with titanium nitride (TiN). Our null hypothesis was that the surface damage and the thickness of the TiN coating do not correlate with the time in vivo. METHODS: Twenty-five TiN-coated bicondylar femoral retrievals with a mean implantation period of 30.7 ± 11.7 months were subjected to an objective surface damage analysis with a semi-quantitative assessment method...
May 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28526551/assessment-of-vertical-ridge-augmentation-in-anterior-aesthetic-zone-using-onlay-xenografts-with-titanium-mesh-versus-the-inlay-bone-grafting-technique-a-randomized-clinical-trial
#8
M Mounir, S Mounir, A A Elfetouh, M A Shaker
The aim of this study was to evaluate the final vertical gain at the deficient anterior maxillary alveolar ridges using onlay bone grafts with titanium mesh versus inlay bone grafting. This was a single institutional randomized comparative clinical trial. The study population included 16 patients, with edentulous anterior maxillary alveolar ridges (40 implant sites) who were presented and treated at the Faculty of Oral and Dental Medicine in Cairo University from September 2013 to August 2015. Selected patients were randomly divided into two equal groups...
May 16, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28524724/antibacterial-effect-of-hydrogen-peroxide-titanium-dioxide-suspensions-in-the-decontamination-of-rough-titanium-surfaces
#9
David Wiedmer, Fernanda Cristina Petersen, Jessica Lönn-Stensrud, Hanna Tiainen
The chemical decontamination of infected dental implants is essential for the successful treatment of peri-implantitis. The aim of this study was to assess the antibacterial effect of a hydrogen peroxide-titanium dioxide (H2O2-TiO2) suspension against Staphylococcus epidermidis biofilms. Titanium (Ti) coins were inoculated with a bioluminescent S. epidermidis strain for 8 h and subsequently exposed to H2O2 with and without TiO2 nanoparticles or chlorhexidine (CHX). Bacterial regrowth, bacterial load and viability after decontamination were analyzed by continuous luminescence monitoring, live/dead staining and scanning electron microscopy...
May 19, 2017: Biofouling
https://www.readbyqxmd.com/read/28522447/photofunctionalised-ti6al4v-implants-enhance-early-phase-osseointegration
#10
R Yamauchi, T Itabashi, K Wada, T Tanaka, G Kumagai, Y Ishibashi
OBJECTIVES: Ultraviolet (UV) light-mediated photofunctionalisation is known to improve osseointegration of pure titanium (Ti). However, histological examination of titanium alloy (Ti6Al4V), which is frequently applied in orthopaedic and dental surgery, has not yet been performed. This study examined the osseointegration of photofunctionalised Ti6Al4V implants. METHODS: Ti and Ti6Al4V implants were treated with UV light, and the chemical composition and contact angle on the surfaces were evaluated to confirm photofunctionalisation...
May 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28522446/non-contact-electromagnetic-induction-heating-for-eradicating-bacteria-and-yeasts-on-biomaterials-and-possible-relevance-to-orthopaedic-implant-infections-in-vitro-findings
#11
B G Pijls, I M J G Sanders, E J Kuijper, R G H H Nelissen
OBJECTIVES: Infection of implants is a major problem in elective and trauma surgery. Heating is an effective way to reduce the bacterial load in food preparation, and studies on hyperthermia treatment for cancer have shown that it is possible to heat metal objects with pulsed electromagnetic fields selectively (PEMF), also known as induction heating. We therefore set out to answer the following research question: is non-contact induction heating of metallic implants effective in reducing bacterial load in vitro? METHODS: Titanium alloy cylinders (Ti6Al4V) were exposed to PEMF from an induction heater with maximum 2000 watts at 27 kHz after being contaminated with five different types of micro-organisms: Staphylococcus epidermidis; Staphylococcus aureus; Pseudomonas aeruginosa; spore-forming Bacillus cereus; and yeast Candida albicans...
May 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28521963/does-local-delivery-of-bisphosphonates-influence-the-osseointegration-of-titanium-implants-a-systematic-review
#12
REVIEW
M B Guimarães, T H Antes, M B Dolacio, D D Pereira, M Marquezan
The aim of this study was to systematically review the influence of the local delivery of bisphosphonates on the osseointegration of titanium implants in humans. A search of health sciences databases was performed (The Cochrane Library, Embase, PubMed MEDLINE, ISI Web of Knowledge, Scopus, and SIGLE OpenGrey), including articles published until October 2016. A total of 679 articles were identified. Following the removal of duplicates, 278 were screened by title and abstract. The complete texts of seven studies were read, and of these, three met the inclusion criteria...
May 15, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28520812/the-effect-of-platelet-rich-plasma-on-osseous-healing-in-dogs-undergoing-high-tibial-osteotomy
#13
Samuel P Franklin, Emily E Burke, Shannon P Holmes
OBJECTIVES: The purpose of this study was to investigate whether platelet-rich plasma (PRP) enhances osseous healing in conjunction with a high tibial osteotomy in dogs. STUDY DESIGN: Randomized controlled trial. METHODS: Sixty-four client-owned pet dogs with naturally occurring rupture of the anterior cruciate ligament and that were to be treated with a high tibial osteotomy (tibial plateau leveling osteotomy) were randomized into the treatment or control group...
2017: PloS One
https://www.readbyqxmd.com/read/28518187/in-vitro-shock-absorption-tests-on-implant-supported-crowns-influence-of-crown-materials-and-luting-agents
#14
Martin Rosentritt, Sibylle Schneider-Feyrer, Michael Behr, Verena Preis
PURPOSE: To investigate the force absorption capacity of implant-supported crowns made of different restorative materials and connected to abutments with different luting agents. MATERIALS AND METHODS: Molar crowns were milled of different computer-aided design/computer-aided manufacture materials (n = 8 crowns per material): polymethyl methacrylate, polyether ether ketone, composite, lithium disilicate, titanium, and zirconia. Crowns were mounted on titanium implant replicas using different luting agents: uncemented, temporarily cemented (zinc oxide-eugenol cement), conventionally cemented (zinc oxide phosphate cement), and adhesively bonded...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518186/molecular-activity-and-osseointegration-after-single-dose-irradiation-an-in-vivo-study
#15
Jan Nyberg, Gisela Helenius, Christer Dahlin, Carina B Johansson, Omar Omar
PURPOSE: Irradiation results in deleterious effects on bone healing and integration of titanium implants. The impact of irradiation on osseointegration has been demonstrated in histologic studies, but the underlying molecular mechanisms have not been explored. This study aimed to investigate the effects of single-dose irradiation on the expression of biologic mediators crucial for inflammation, bone formation, and bone remodeling and to relate these molecular activities to implant stability after a 5-week healing period...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518180/the-effects-of-laser-with-different-parameters-and-crosshatching-on-fibroblast-adhesion-and-proliferation-to-implant-surfaces
#16
Hakki Çelebi, Pembegül Uyar Arpacı, Ilhami Çelik, Serhan Akman
PURPOSE: To compare the adhesion and proliferation effect of HGF-1 cells on pure titanium disks when the surfaces are unprocessed (machined surfaces after slicing) or modified with a laser. MATERIALS AND METHODS: Twenty-eight titanium disks were divided into four groups. Three surface topographies were created using an erbium fiber laser: group 1 (unidirectional application [no crosshatch]), group 2 (crosshatching in two directions), and group 3 (crosshatching in three directions)...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28516215/are-clinical-findings-of-systemic-titanium-dispersion-following-implantation-explained-by-available-in-vitro-evidence-an-evidence-based-analysis
#17
REVIEW
Justin Paul Curtin, Minji Wang
Although the presence of titanium wear particles released into tissues is known to induce local inflammation following the therapeutic implantation of titanium devices into humans, the role that titanium ions play in adverse tissue responses has received little attention. Support that ongoing titanium ion release occurs is evidenced by the presence of ionic titanium bound to transferrin in blood, and ongoing excretion in the urine of patients with titanium devices. However, as reports documenting the presence of titanium within tissues do not distinguish between particulate and ionic forms due to technical challenges, the degree to which ionic titanium is released into tissues is unknown...
May 17, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28513977/use-of-high-performance-polymers-as-dental-implant-abutments-and-frameworks-a-case-series-report
#18
Mohammad Al-Rabab'ah, Wala'a Hamadneh, Ismail Alsalem, Ameen Khraisat, Ashraf Abu Karaky
Dental implant abutments can be made of different materials including titanium, gold, zirconia, alumina, and polymeric materials. Polyetheretherketone (PEEK) is a high performance thermoplastic polymer that can be used as a dental implant abutment material. It has an elastic modulus comparable to bone and can reduce stress shielding. PEEK is a radiolucent material that can allow better radiographic imaging of peri-implant tissues and can be veneered with composite materials or bonded to ceramics. PEEK is widely used in orthopedic and spinal surgeries, and it possesses mechanical and biological characteristics that encourage its use as dental implant abutments...
May 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28513138/in-situ-growth-of-mesoporous-silica-with-drugs-on-titanium-surface-and-their-biomedical-applications
#19
Mimi Wan, Qi Wang, Shuyue Zhan, Xudong Chen, Chun Mao, Yuhong Liu, Jian Shen
Mesoporous silica has been developed for modification of titanium surface as implant materials. Yet, the traditional modification methods failed to effectively construct mesoporous silica on titanium surface evenly and firmly, of which the interaction between mesoporous silica and titanium was mainly physical interaction. Here, in situ growth of mesoporous silica on Titanium surface was performed using a simple evaporation-induced self-assembly strategy. Meantime, in situ introduction of drugs (heparin and vancomycin) to mesoporous silica was also adopted to improve drug loading amount...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28512544/oral-health-related-quality-of-life-outcomes-of-partially-edentulous-patients-treated-with-implant-supported-single-crowns-or-fixed-partial-dentures
#20
Bader K AlZarea
BACKGROUND: Oral health-related quality of life (OHRQoL) is afflicted by different variables. Limited information is available regarding the impact of different phases of implant therapy on OHRQoL of edentulous patients. This study was carried out to assess the OHRQoL of patients treated with implant-supported single crowns or fixed partial dentures. MATERIAL AND METHODS: A total of 79 healthy partially edentulous subjects needing implant therapy were incorporated in this study...
May 2017: Journal of Clinical and Experimental Dentistry
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