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https://www.readbyqxmd.com/read/29683803/is-cemented-or-cementless-femoral-stem-fixation-more-durable-in-patients-older-than-75-years-of-age-a-comparison-of-the-best-performing-stems
#1
Michael Tanzer, Stephen E Graves, Andrea Peng, Andrew J Shimmin
BACKGROUND: There is ongoing debate concerning the best method of femoral fixation in older patients receiving primary THA. Clinical studies have shown high survivorship for cemented and cementless femoral stems. Arthroplasty registry studies, however, have universally shown that cementless stems are associated with a higher rate of revision in this patient population. It is unclear if the difference in revision rate is a reflection of the range of implants being used for these procedures rather than the mode of fixation...
April 9, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29681761/when-do-orthopaedic-oncologists-consider-the-implantation-of-expandable-prostheses-in-bone-sarcoma-patients
#2
Magdalena M Gilg, Christine Wibmer, Marko Bergovec, Robert J Grimer, Andreas Leithner
Introduction: Indications discussed for the implantation of expandable prostheses in bone sarcoma patients are unclear. This survey aimed to analyse common practice with this implant type in orthopaedic oncology. Methods: A web-based survey was sent to 98 orthopaedic oncology surgeons. Factors reported in literature to influence the decision on the implantation of a growing prosthesis were covered in individual questions and three case scenarios. Results: The completion rate of the survey was 45% ( n  = 44)...
2018: Sarcoma
https://www.readbyqxmd.com/read/29675508/are-trabecular-metal-cones-a-valid-option-to-treat-metaphyseal-bone-defects-in-complex-primary-and-revision-knee-arthroplasty
#3
REVIEW
Tommaso Bonanzinga, Thorsten Gehrke, Akos Zahar, Stefano Zaffagnini, Maurilio Marcacci, Carl Haasper
Purpose  Metaphyseal bone defects are a challenge in complex primary and revision total knee arthroplasty (TKA). Recently, several studies have been published with promising results about the use of Trabecular Metal (TM) cones to address bone defects. The aim of this study is to review the literature to assess the efficacy of TM cones to address metaphyseal bone loss. Methods  A comprehensive search was performed on PubMed, Medline, CINAHL, Cochrane, Embase, and Google Scholar databases using various combinations of the following keywords: "metaphyseal," "cones," "tantalum," "knee," and "revision...
March 2018: Joints
https://www.readbyqxmd.com/read/29674772/total-hip-arthroplasty-for-patients-with-residual-poliomyelitis-at-a-mean-eight-years-of-follow-up
#4
Mayumi Sonekatsu, Motoki Sonohata, Masaru Kitajima, Shunsuke Kawano, Masaaki Mawatari
In patients with poliomyelitis, degenerative arthritis of the hip may be encountered in the paralytic or normal contralateral limb because of leg length discrepancy, pelvic obliquity, or severe deformities of the affected hip. Although total hip arthroplasty (THA) is one of the most common orthopedic procedures, there are few reports of THA in adult patients with residual poliomyelitis. From March 2001 to January 2011, 5 patients with residual poliomyelitis (6 hips) underwent THA using uncemented implants at our hospital...
April 2018: Acta Medica Okayama
https://www.readbyqxmd.com/read/29664609/using-an-engineered-galvanic-redox-system-to-generate-positive-surface-potentials-that-promote-osteogenic-functions
#5
Yulong Zhang, Zhong Zheng, Mengliu Yu, Chinyun Hsu, Emily Berthiaume, Hsinchuan Pan, Xinli Zhang, Adam Z Stieg, Benjamin Wu, Huiming Wang, Kang Ting, Chia Soo
Successful osseointegration of orthopaedic and orthodontic implants is dependent on a competition between osteogenesis and bacterial contamination on the implant-tissue interface. Previously, by taking advantage of the highly interactive capabilities of silver nanoparticles (AgNPs), we effectively introduced an antimicrobial effect to metal implant materials using a AgNP/poly(DL-lactic-co-glycolic acid) (PLGA) coating. Although electrical forces have been shown to promote osteogenesis, creating practical materials and devices capable of harnessing these forces to induce bone regeneration remains challenging...
April 17, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29663105/cemented-versus-uncemented-hemiarthroplasty-of-the-hip-in-patients-with-a-femoral-neck-fracture-a-comparison-of-two-modern-stem-design-implants
#6
M R M Frenken, M G M Schotanus, E H van Haaren, R Hendrickx
PURPOSE: We wished to compare the outcome of two types of cemented and uncemented modern stem design implants after hemiarthroplasty, with both an Orthopaedic Data Evaluation Panel rating of 10A. METHODS: This retrospective study compares data obtained from two centres, with a total study population of 655 (n = 393 cemented, n = 262 uncemented). Patients were matched at baseline for gender, age, surgery side, American Society of Anesthesiologists score, body mass index and pre-operative haemoglobin level...
April 16, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29661674/evaluation-of-transsyndesmotic-fixation-and-primary-deltoid-ligament-repair-in-ankle-fractures-with-suspected-combined-deltoid-ligament-injury
#7
Kai Wu, Jian Lin, Jianhua Huang, Qiugen Wang
The present prospective study examined the utility of the intraoperative tap test/technique for distal tibiofibular syndesmosis in the diagnosis of deltoid ligament rupture and compared the outcomes of transsyndesmotic fixation to deltoid ligament repair with suture anchor. This diagnostic technique was performed in 59 ankle fractures with suspected deltoid ligament injury. The width of the medial clear space of 59 cases was evaluated to assess the sensitivity and specificity. Those with deltoid ligament rupture were randomly assigned to 2 groups and treated with deltoid ligament repair with a suture anchor or with syndesmosis screw fixation...
April 13, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29657845/long-term-bone-remodelling-around-legendary-cementless-femoral-stems
#8
Charles Rivière, Guido Grappiolo, Charles A Engh, Jean-Pierre Vidalain, Antonia-F Chen, Nicolas Boehler, Jihad Matta, Pascal-André Vendittoli
Bone remodelling around a stem is an unavoidable long-term physiological process highly related to implant design. For some predisposed patients, it can lead to periprosthetic bone loss secondary to severe stress-shielding, which is thought to be detrimental by contributing to late loosening, late periprosthetic fracture, and thus rendering revision surgery more complicated.However, these concerns remain theoretical, since late loosening has yet to be documented among bone ingrowth cementless stems demonstrating periprosthetic bone loss associated with stress-shielding...
February 2018: EFORT open reviews
https://www.readbyqxmd.com/read/29656232/gallium-incorporation-into-phosphate-based-glasses-bulk-and-thin-film-properties
#9
Bryan W Stuart, Colin A Grant, George E Stan, Adrian C Popa, Jeremy J Titman, David M Grant
The osteogenic ions Ca2+ , P5+ , Mg2+ , and antimicrobial ion Ga3+ were homogenously dispersed into a 1.45 µm thick phosphate glass coating by plasma assisted sputtering onto commercially pure grade titanium. The objective was to deliver therapeutic ions in orthopaedic/dental implants such as cementeless endoprostheses or dental screws. The hardness 4.7 GPa and elastic modulus 69.7 GPa, of the coating were comparable to plasma sprayed hydroxyapatite/dental enamel, whilst superseding femoral cortical bone...
March 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29649599/time-dependent-differences-in-management-and-microbiology-of-orthopaedic-internal-fixation-associated-infections-an-observational-prospective-study-with-229-patients
#10
Richard Kuehl, Sarah Tschudin Sutter, Mario Morgenstern, Marc Dangel, Adrian Egli, Andrej Nowakowski, Norbert Suhm, Christian Theilacker, Andreas F Widmer
OBJECTIVES: Little information is published on orthopaedic internal fixation-associated infections. We aimed to analyse time-dependent microbiology, treatment, and outcome. METHODS: Over a ten-year period, all consecutive patients with internal fixation-associated infections at the University Hospital Basel were prospectively followed by acquiring clinical, microbiological and outcome data. Infections were classified as early (0-2 weeks after implantation), delayed (3-10 weeks) and late (>10 weeks)...
April 9, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29648876/use-of-patient-specific-3d-printed-titanium-implants-for-complex-foot-and-ankle-limb-salvage-deformity-correction-and-arthrodesis-procedures
#11
Travis J Dekker, John R Steele, Andrew E Federer, Kamran S Hamid, Samuel B Adams
BACKGROUND: The advancement of 3D printing technology has allowed for the use of custom-designed implants for difficult-to-treat foot and ankle pathologies. This study reports on the radiographic and functional outcomes of a case series of patients treated with patient-specific 3D-printed titanium implants. METHODS: Fifteen consecutive patients treated with custom-designed 3D-printed implant cages for severe bone loss, deformity correction, and/or arthrodesis procedures were included in this study...
April 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29644087/clinical-observation-of-biomimetic-mineralized-collagen-artificial-bone-putty-for-bone-reconstruction-of-calcaneus-fracture
#12
Yong-Xiong Pan, Guang-Gang Yang, Zhong-Wan Li, Zhong-Min Shi, Zhan-Dong Sun
This study investigated clinical outcomes of biomimetic mineralized collagen artificial bone putty for bone reconstruction in the treatment of calcaneus fracture. Sixty cases of calcaneal fractures surgically treated with open reduction and internal fixation in our hospital from June 2014-2015 were chosen and randomly divided into two groups, including 30 cases treated with biomimetic mineralized collagen artificial bone putty as treatment group, and 30 cases treated with autogenous ilia as control group. The average follow-up time was 17...
March 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29629591/displaced-femoral-neck-fractures-in-patients-60-years-of-age-or-younger-results-of-internal-fixation-with-the-dynamic-locking-blade-plate
#13
J H Kalsbeek, A D P van Walsum, J P A M Vroemen, H M J Janzing, J T Winkelhorst, B P Bertelink, W H Roerdink
Aims The objective of this study was to investigate bone healing after internal fixation of displaced femoral neck fractures (FNFs) with the Dynamic Locking Blade Plate (DLBP) in a young patient population treated by various orthopaedic (trauma) surgeons. Patients and Methods We present a multicentre prospective case series with a follow-up of one year. All patients aged ≤ 60 years with a displaced FNF treated with the DLBP between 1st August 2010 and December 2014 were included. Patients with pathological fractures, concomitant fractures of the lower limb, symptomatic arthritis, local infection or inflammation, inadequate local tissue coverage, or any mental or neuromuscular disorder were excluded...
April 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29628687/megaprosthesis-versus-allograft-prosthesis-composite-for-massive-skeletal-defects
#14
REVIEW
Deepak Gautam, Rajesh Malhotra
Massive skeletal defects are encountered in the setting of tumors necessitating excision, failed total hip arthroplasty with periprosthetic bone loss, periprosthetic fracture, complex trauma, multiple failed osteosynthesis and infection. Reconstruction of the segmental defects poses a tremendous challenge to the orthopaedic surgeons. The goal of osseous reconstruction of these defects is to restore the bone length and function. Currently the most commonly employed methods for reconstruction are either a megaprosthesis or an Allograft Prosthesis Composite (APC)...
January 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29628133/radiostereometric-analysis-using-clinical-radiographic-views-development-of-a-universal-calibration-object
#15
Jordan S Broberg, Xunhua Yuan, Matthew G Teeter
Radiostereometric analysis (RSA) is a highly accurate technique used to provide three-dimensional (3D) measurements of orthopaedic implant migration for clinical research applications, yet its implementation in routine clinical examinations has been limited. Previous studies have introduced a modified RSA procedure that separates the calibration examinations from the patient examinations, allowing routine clinical radiographs to be analyzed using RSA. However, in order to calibrate the wide range of clinical views, a new calibration object is required...
March 29, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29624081/metal-resurfacing-inlay-implant-for-osteochondral-talar-defects-after-failed-previous-surgery-a-midterm-prospective-follow-up-study
#16
Gwendolyn Vuurberg, Mikel L Reilingh, Christiaan J A van Bergen, Inge C M van Eekeren, Rogier M Gerards, C Niek van Dijk
BACKGROUND: Treatment of osteochondral talar defects (OCDs) after failed previous surgery is challenging. Promising short-term results have been reported with use of a metal resurfacing inlay implant. PURPOSE: To evaluate the midterm clinical effectiveness of the metal implant for OCDs of the medial talar dome after failed previous surgery. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: We prospectively studied all patients who met the inclusion criteria and received a metal resurfacing inlay implant between 2007 and 2014...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29623549/defect-related-luminescent-bur-like-hydroxyapatite-microspheres-induced-apoptosis-of-mc3t3-e1-cells-by-lysosomal-and-mitochondrial-pathways
#17
REVIEW
Yi Jin, Shizhu Chen, Nan Li, Yajing Liu, Gong Cheng, Cuimiao Zhang, Shuxiang Wang, Jinchao Zhang
When orthopedic joints coated by hydroxyapatite (HA) were implanted in the human body, they release wear debris into the surrounding tissues. The generation and accumulation of wear particles will induce aseptic loosening. However, the potential bioeffect and mechanism of HA-coated orthopedic implants on bone cells are poorly understood. In this study, defect-related luminescent bur-like hydroxyapatite (BHA) microspheres with the average diameter of 7-9 μm which are comparable to that of the wear-debris particles from aseptically loosened HA implants or HA debris have been synthesized by hydrothermal synthesis and the MC3T3-E1 cells were set as a cells model to study the potential bioeffect and mechanism of BHA microspheres...
March 30, 2018: Science China. Life Sciences
https://www.readbyqxmd.com/read/29618145/reliability-of-intraoperative-knee-range-of-motion-measurements-by-goniometer-compared-with-robot-assisted-arthroplasty
#18
Hyuck Min Kwon, Ick-Hwan Yang, Woo-Suk Lee, Alvin Ray L Yu, Sang Yun Oh, Kwan Kyu Park
Accurate measurement of knee range of motion (ROM) is critical to predict the outcomes of knee surgery and prognosis. We investigated the reliability of knee ROM measurements by goniometer compared with robotic system. Fifty-three patients with medial osteoarthritis who were planning to undergo unicompartmental knee arthroplasty (UKA) with robotic UKA were prospectively enrolled. During the operation, knee ROM measurement was performed in both flexion and extension before and after insertion of the implant using both a goniometer and robotic system...
April 4, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29615017/clinical-and-radiographic-outcome-of-dynamic-cervical-implant-dci-arthroplasty-for-degenerative-cervical-disc-disease-a-minimal-five-year-follow-up
#19
Lin-Nan Wang, Bo-Wen Hu, Lei Wang, Yue-Ming Song, Xi Yang, Li-Min Liu, Hao Liu
BACKGROUND: To evaluate the mid- to long-term clinical and radiographic outcomes of anterior cervical discectomy and dynamic cervical implant (DCI) arthroplasty for degenerative cervical disc disease. METHODS: From April 2010 to October 2010, 38 patients with single- or double-level cervical disc herniation underwent anterior cervical discectomy and DCI arthroplasty. The clinical results and radiographic outcomes of these 38 patients (42 levels) were retrospectively evaluated...
April 4, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29614037/new-parameters-to-quantitatively-express-the-invasiveness-of-bacterial-strains-from-implant-related-orthopaedic-infections-into-osteoblast-cells
#20
Davide Campoccia, Lucio Montanaro, Stefano Ravaioli, Ilaria Cangini, Francesca Testoni, Livia Visai, Carla Renata Arciola
Complete eradication of bacterial infections is often a challenging task, especially in presence of prosthetic devices. Invasion of non-phagocytic host cells appears to be a critical mechanism of microbial persistence in host tissues. Hidden within host cells, bacteria elude host defences and antibiotic treatments that are intracellularly inactive. The intracellular invasiveness of bacteria is generally measured by conventional gentamicin protection assays. The efficiency of invasion, however, markedly differs across bacterial species and adjustments to the titre of the microbial inocula used in the assays are often needed to enumerate intracellular bacteria...
April 3, 2018: Materials
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