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Orthopaedic implant

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https://www.readbyqxmd.com/read/28439303/proximal-femoral-osteotomy-in-children-with-cerebral-palsy-the-perspective-of-the-trainee
#1
L Zhou, M Camp, A Gahukamble, K L Willoughby, M Harambasic, C Molesworth, A Khot, H K Graham
BACKGROUND: There are a range of implants for fixation of proximal femoral osteotomies (PFOs) in children. We investigated the training experiences and preferences of orthopaedic residents and fellows who were learning PFO, using a fixed angled blade plate (ABP) or a locking, cannulated blade plate (LCBP). We also studied short-term technical and radiographic outcomes. METHODS: This was a prospective, parallel-group, cohort study of 90 consecutive children and adolescents with cerebral palsy who underwent bilateral PFOs with ABP or LCBP...
2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28436378/outcomes-of-corpectomy-in-patients-with-metastatic-cancer
#2
Grzegorz Guzik
BACKGROUND: The objective of surgical management of spinal metastases is to reduce pain and improve the patient's quality of life. The operation should restore spinal stability and decompress neural structures. One surgical technique is corpectomy followed by vertebral body reconstruction and stabilisation of the spine. The procedure may be performed in patients in overall good health and a good survival prognosis. The aim of this paper is to present the outcomes of surgical management of spinal metastases in patients who underwent corpectomy followed by vertebral body reconstruction and stabilisation of the spine...
January 26, 2017: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28435567/role-of-antibiotic-cement-coated-nailing-in-infected-nonunion-of-tibia
#3
C Bhatia, A K Tiwari, S B Sharma, S Thalanki, A Rai
INTRODUCTION: Infected nonunion of long bones is a chronic and debilitating disorder. It is more difficult to deal with when the implant used for internal fixation itself becomes a potential media for infection because of bacterial adhesion and biofilm formation. Traditionally, it is managed by two-stage procedure for controlling the infection first and then treating the nonunion. This study has been undertaken to explore antibiotic cement coated nailing as single stage treatment modality for treating infection and achieving stability at the same time...
March 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28430747/interprosthetic-and-peri-implant-fractures-principles-of-operative-fixation-and-future-directions
#4
Frank A Liporace, Richard S Yoon, Cory A Collinge
Advances in medicine and orthopaedic implant technology have dramatically increased the number of patients sustaining interprosthetic, inter-, or peri-implant fractures. For these complex clinical scenarios, there are currently no available treatment algorithms. In this review, we outline the principles, strategies, and techniques to obtain both successful reconstruction and maximum function. LEVEL OF EVIDENCE: Therapeutic Level V. See Instructions for Authors for a complete description of levels of evidence...
May 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28407423/orthopaedic-biofilm-infections
#5
REVIEW
Werner Zimmerli, Parham Sendi
Many infections of the musculoskeletal system are biofilm infections that develop on non-living surfaces. Microorganisms adhere either on dead bone (sequesters) or implants. As a rule for a curative concept, chronic osteomyelitis or implant-associated bone infection must be treated with a combination of surgery and antimicrobial therapy. If an implant is kept in place, or a new device is implanted before complete healing of infection, a biofilm-active antibiotic should be used. Rifamycins are active against biofilms of staphylococci, and fluoroquinolones against those of Gram-negative bacilli...
April 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28404548/the-tip-apex-distance-in-the-x-bolt-dynamic-plating-system
#6
M A Fernandez, A Aquilina, J Achten, N Parsons, M L Costa, X L Griffin
OBJECTIVES: The Sliding Hip Screw (SHS) is commonly used to treat trochanteric hip fractures. Fixation failure is a devastating complication requiring complex revision surgery. One mode of fixation failure is lag screw cut-out which is greatest in unstable fracture patterns and when the tip-apex distance of the lag screw is > 25 mm. The X-Bolt Dynamic Hip Plating System (X-Bolt Orthopaedics, Dublin, Ireland) is a new device which aims to reduce this risk of cut-out. However, some surgeons have reported difficulty minimising the tip-apex distance with subsequent concerns that this may lead to an increased risk of cut-out...
April 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28399493/increasing-strength-of-a-biomedical-ti-nb-ta-zr-alloy-by-alloying-with-fe-si-and-o
#7
Josef Stráský, Petr Harcuba, Kristína Václavová, Klaudia Horváth, Michal Landa, Ondřej Srba, Miloš Janeček
Low-modulus biomedical beta titanium alloys often suffer from low strength which limits their use as load-bearing orthopaedic implants. In this study, twelve different Ti-Nb-Zr-Ta based alloys alloyed with Fe, Si and O additions were prepared by arc melting and hot forging. The lowest elastic modulus (65GPa) was achieved in the benchmark TNTZ alloy consisting only of pure β phase with low stability due to the 'proximity' to the β to α'' martensitic transformation. Alloying by Fe and O significantly increased elastic modulus, which correlates with the electrons per atom ratio (e/a)...
April 2, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28395393/opportunities-in-total-knee-arthroplasty-worldwide-surgeons-perspective
#8
Michael Dunbar, Jared M Newman, Anton Khlopas, Morad Chughtai, Nick Martinez, Manoshi Bhowmik-Stoker, Michael A Mont
INTRODUCTION: This study surveyed a group of US and international orthopaedic surgeons to prioritize areas of improvement in primary total knee arthroplasty (TKA). Specifically, we assessed surgeon responses regarding the top five areas of TKA needing improvement; which were stratified by: a) US surgeons, b) international surgeons, c) US surgeons' implant-brand-loyalty, and d) surgeons' years of experience and case volume. MATERIALS AND METHODS: Four hundred and eighteen surgeons who were board-certified, in practice for at least two years, spent 60% of their time in clinical practice, and performed a minimum of 25 lower extremity joint arthroplasties per year were surveyed...
April 11, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28394845/im-nail-fixation-of-atypical-femur-fractures-with-bone-marrow-aspirate-concentrate-leads-to-faster-union-a-case-control-study
#9
Andrew J Lovy, Jun S Kim, John Di Capua, Sulaiman Somani, Stephanie Shim, Aakash Keswani, Rohit Hasija, Yangguan Wu, David Joseph, Richard Ghillani
OBJECTIVES: High rates of implant failure and nonunion in atypical femur fractures (AFF) have been reported. The aim of this study was to evaluate bone marrow aspirate concentrate (BMAC) use in the treatment of AFF. DESIGN: Retrospective Case Control SETTING:: Level 1 Trauma Center PATIENTS:: Complete AFF, defined according to American Society of Bone and Mineral Research (ASBMR) criteria, from September 2009 to April 2015 with minimum 1 year follow up. INTERVENTION: Operative treatment with anterograde intramedullary (IM) nails...
April 7, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28393758/prosthetic-joint-and-implant-contamination-caused-by-ralstonia-pickettii-a-report-of-three-cases%C3%B9
#10
Brett D Edwards, Ranjani Somayaji, Bayan Missaghi, Wilson W Chan, Aaron J Bois
We describe three cases of orthopaedic contamination caused by Ralstonia pickettii grown from prosthetic joint and implant material cultures following sonication in the microbiology laboratory. Given the temporal association between the cases, lack of clinical or intra-operative features of infection, growth of the organism in the water bath, and unlikely etiology of Ralstonia as a prosthetic joint or implant pathogen, the bacteria were judged to be contaminants.
2017: SICOT-J
https://www.readbyqxmd.com/read/28386730/inhibition-of-biofilm-formation-on-iodine-supported-titanium-implants
#11
Daisuke Inoue, Tamon Kabata, Kaori Ohtani, Yoshitomo Kajino, Toshiharu Shirai, Hiroyuki Tsuchiya
PURPOSE: We have developed iodine-supported titanium implants that suppress microbial activities and conducted in vivo and in vitro studies to determine their antimicrobial properties. METHODS: The implants were Ti-6Al-4 V titanium implants either untreated (Ti), treated with oxide film on the Ti surface by anodization (Ti-O), or treated with an iodine coating on oxidation film (Ti-I). The strain of bacteria used in this study was Gram-positive Staphylococcus aureus strain ATCC 25923...
April 7, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28385242/gallium-modified-chitosan-poly-acrylic-acid-bilayer-coatings-for-improved-titanium-implant-performances
#12
Maria A Bonifacio, Stefania Cometa, Manuela Dicarlo, Federico Baruzzi, Silvia de Candia, Antonio Gloria, Maria M Giangregorio, Monica Mattioli-Belmonte, Elvira De Giglio
A gallium-modified chitosan/poly(acrylic acid) bilayer was obtained by electrochemical techniques on titanium to reduce orthopaedic and/or dental implants failure. The bilayer in vitro antibacterial properties and biocompatibility were evaluated against Escherichia coli and Pseudomonas aeruginosa and on MG63 osteoblast-like cells, respectively. Gallium loading into the bilayer was carefully tuned by the electrochemical deposition time to ensure the best balance between antibacterial activity and cytocompatibility...
June 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28384945/excision-versus-fixation-of-the-radial-head-a-comparative-study-of-the-functional-outcomes-of-the-two-techniques
#13
Sanath Kumar Shetty, Ashwin Shetty, Bijith Balan, Arjun Ballal, H Ravindranath Rai, Anoop Hegde
INTRODUCTION: The management of displaced and comminuted radial head fractures has been a matter of debate amongst surgeons for many years. Radial head excision formed the mainstay of surgical management of these injuries. Over the years, there have been improvements in the surgical techniques and availability of better implants and instrumentation techniques, hence, open reduction and internal fixation of these fractures is gaining popularity. AIM: To compare the outcome of elbow function between radial head excision and open reduction and internal fixation of the radial head with mini screws of Mason Type II and Type III radial head fractures and to assess the complications that occur in both techniques...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28378004/variation-in-the-cost-of-care-for-primary-total-knee-arthroplasties
#14
Derek A Haas, Robert S Kaplan
BACKGROUND: The study examined the cost variation across 29 high-volume US hospitals and their affiliated orthopaedic surgeons for delivering a primary total knee arthroplasty without major complicating conditions. The hospitals had similar patient demographics, and more than 80% of them had statistically-similar Medicare risk-adjusted readmission and complication rates. METHODS: Hospital and physician personnel costs were calculated using time-driven activity-based costing...
March 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28376059/skeletal-assessment-with-finite-element-analysis-relevance-pitfalls-and-interpretation
#15
Graeme Michael Campbell, Claus-C Glüer
PURPOSE OF REVIEW: Finite element models simulate the mechanical response of bone under load, enabling noninvasive assessment of strength. Models generated from quantitative computed tomography (QCT) incorporate the geometry and spatial distribution of bone mineral density (BMD) to simulate physiological and traumatic loads as well as orthopaedic implant behaviour. The present review discusses the current strengths and weakness of finite element models for application to skeletal biomechanics...
April 3, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/28375897/-red-yellow-green-effect-of-an-initiative-to-guide-surgeon-choice-of-orthopaedic-implants
#16
Kanu Okike, Rachael Pollak, Robert V O'Toole, Andrew N Pollak
BACKGROUND: Orthopaedic procedures are expensive, and devices account for a large proportion of the overall costs. Hospitals have employed a variety of strategies to decrease implant costs, but many center on restricting surgeon choice. At our institution, we developed an implant selection tool that guides surgeons toward more cost-effective implants, while minimally restricting choice. The purpose of this study was to assess the effect of this tool on preferred implant usage rates, vendor attitudes toward pricing structure, and hospital implant expenditures...
April 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28371501/therapeutic-outcomes-of-kalix-ii-in-treating-juvenile-flexible-flatfoot
#17
Le Cao, Xu-Dong Miao, Yong-Ping Wu, Xiang-Feng Zhang, Qiang Zhang
OBJECTIVES: To evaluate the therapeutic outcomes with Kalix II subtalar arthroereisis in sinus tarsi for juvenile flexible flatfoot. METHODS: A retrospective analysis of the data of 20 juveniles with symptomatic flexible flatfoot (27 feet) who underwent the Kalix II implant procedure from January 2008 to September 2012 was performed. The pain during daily activities was assessed and followed up by use of a standard 10-point visual analog scale (VAS), and function was evaluated using the American Orthopaedic Foot and Ankle Society (AOFAS) ankle and hindfoot scoring system, and anteroposterior talar-first metatarsal angle, lateral talar-first metatarsal angle, calcaneal pitch angle, and talar declination angle at X-ray film were measured to assess the therapeutic outcomes...
February 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28345414/fresh-osteochondral-allograft-transplantation-for-fractures-of-the-knee
#18
Guilherme C Gracitelli, Luis Eduardo Passarelli Tirico, Julie C McCauley, Pamela A Pulido, William D Bugbee
Objective The purpose of this study was to evaluate functional outcomes and allograft survivorship among patients with knee fracture who underwent fresh osteochondral allograft (OCA) transplantation as a salvage treatment option. Design Retrospective analysis of prospectively collected data. Setting Department of Orthopaedic Surgery at one hospital. Patients Fresh OCAs were implanted for osteochondral lesions after knee fracture in 24 males and 15 females with an average age of 34 years. Twenty-nine lesions (74%) were tibial plateau fractures, 6 (15%) were femoral condyle fractures, and 4 (10%) were patella fractures...
April 2017: Cartilage
https://www.readbyqxmd.com/read/28344902/isolation-and-characterization-of-human-articular-chondrocytes-from-surgical-waste-after-total-knee-arthroplasty-tka
#19
Jakob Naranda, Lidija Gradišnik, Mario Gorenjak, Matjaž Vogrin, Uroš Maver
BACKGROUND: Cartilage tissue engineering is a fast-evolving field of biomedical engineering, in which the chondrocytes represent the most commonly used cell type. Since research in tissue engineering always consumes a lot of cells, simple and cheap isolation methods could form a powerful basis to boost such studies and enable their faster progress to the clinics. Isolated chondrocytes can be used for autologous chondrocyte implantation in cartilage repair, and are the base for valuable models to investigate cartilage phenotype preservation, as well as enable studies of molecular features, nature and scales of cellular responses to alterations in the cartilage tissue...
2017: PeerJ
https://www.readbyqxmd.com/read/28337895/use-of-supercharged-cover-screw-as-static-magnetic-field-generator-for-bone-healing-1st-part-in-vitro-enhancement-of-osteoblast-like-cell-differentiation
#20
F Bambini, A Santarelli, A Putignano, M Procaccini, G Orsini, L Memè, D Sartini, M Emanuelli, L Lo Muzio
Since 1979, Pulsed electromagnetic fields (PEMFs) have been approved by the Food and Drug Administration as an effective method in the treatment of non-unions. As well as PEMFs, also static magnetic fields (SMFs) have been widely investigated in orthopaedic studies. Even if the exact mechanism of action is not well understood, a large number of studies showed specific effects both at cellular and tissue levels. As bone fracture healing and osseointegration share the same biological events, the application of magnetic field stimulation in order to facilitate the osseointegration process has been suggested...
January 2017: Journal of Biological Regulators and Homeostatic Agents
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