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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
#1
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/29673552/fracture-of-cobalt-chrome-fully-coat-beaded-femoral-revision-long-stem-a-clinical-outcomes-study
#2
Chih-Hsiang Chang, Po-Chun Lin, Cheng-Min Shih, Chun-Chieh Chen, Pang-Hsin Hsieh, Hsin-Nung Shih
BACKGROUND: Femoral bone loss during revision total hip arthroplasty poses a challenging problem. Bypass fixation over the diaphysis has achieved clinical success in cases of proximal femoral bone loss. Fracture of cementless, fully bead-coated femoral stem is an uncommon complication. The purpose of this study is to analyze the patients with and without fracture stem and find out the possible risk factors. METHODS: From 2006 to 2012, a total of 251 revision long stems (Zimmer, Warsaw, IN) were implanted...
February 2018: Biomedical Journal
https://www.readbyqxmd.com/read/29667227/effects-of-knockout-of-the-receptor-for-advanced-glycation-end-products-on-bone-mineral-density-and-synovitis-in-mice-with-intra-articular-fractures
#3
Dongrim Seol, Yuki Tochigi, Ashley M Bogner, Ino Song, Douglas C Fredericks, Gail L Kurriger, Sonja M Smith, Jessica E Goetz, Joseph A Buckwalter, James A Martin
Our group employed the mouse closed intra-articular fracture (IAF) model to test the hypothesis that the innate immune system plays a role in initiating synovitis and post-traumatic osteoarthritis (PTOA) in fractured joints. A transgenic strategy featuring knockout of the receptor for advanced glycation end-products (RAGE -/- ) was pursued. The 42 and 84 mJ impacts used to create fractures were in the range previously reported to cause PTOA at 60 days post-fracture. MicroCT (µCT) was used to assess fracture patterns and epiphyseal and metaphyseal bone loss at 30 and 60 days post-fracture...
April 17, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29664880/split-depressed-lateral-tibial-plateau-fractures-a-comparision-of-augmented-percutaneous-screws-versus-augmented-plate-and-screw-construct-in-a-cadaveric-model
#4
Richard J Bowles, Vivek Chadayammuri, Antonio Brecevich, Todd Baldini, Cyril Mauffrey
OBJECTIVES: To compare the strength of fixation of percutaneous screw versus plate/screw fixation in a paired cadaver model of OTA 41-B3 (1) (Schatzker type II) split depression fractures of the lateral tibial plateau. METHODS: Six matched pairs of cadaveric knees were acquired. A OTA 41-B3 (Schatzker type II) split depression fracture was created in all specimens using a standardized method. One specimen from each matched pair of knees was fixed with percutaneous screws, and the other was fixed with a plate/screw construct...
April 3, 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29660737/treatment-of-a-paediatric-distal-femoral-malunion-deformity
#5
Greta S Pavarotti, Randy J Boudrieau
OBJECTIVE:  The aim of this article was to describe the surgical re-alignment technique and stabilization of a distal femoral deformity in a 6-week-old, male, Foxhound. METHODS:  A healing metaphyseal fracture, resulting in a valgus deformity with internal rotation, was observed just proximal to the distal femoral physis. The deformity was treated by an opening wedge osteotomy with lateral translation and external rotation of the distal epiphysis using a guide-wire technique; a corticocancellous allograft bridged the defect, which was stabilized with a 2...
April 16, 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/29655367/biologic-plating-of-unstable-distal-radial-fractures
#6
Jae-Man Kwak, Gu-Hee Jung
BACKGROUND: Volar locking plating through the flexor carpi radialis is a well-established technique for treating unstable distal radial fractures, with few reported complications. In certain circumstances, including metaphyseal comminuted fractures, bridge plating through a pronator quadratus (PQ)-sparing approach may be required to preserve the soft tissue envelope. This study describes our prospective experience with bridge plating through indirect reduction. METHODS: Thirty-three wrists (four 23A2, six 23A3, 15 23C1, and eight 23C2) underwent bridge plating through a PQ-sparing approach with indirect reduction from June 2006 to December 2010...
April 14, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29653241/navigation-for-lower-limb-alignment-during-internal-fixation-of-complex-tibial-plateau-fractures
#7
B Vibert, R Pailhé, V Morin, B Rubens-Duval, D Saragaglia
In complex fractures of the proximal tibial metaphysis and epiphysis, possible adverse outcomes after internal fixation include not only joint surface incongruity, but also lower limb malalignment requiring revision surgery. Navigation has been proven effective for the intra-operative control of lower limb alignment during osteotomy and knee arthroplasty. In complex traumatic fractures, temporary fixation by a locking screw plate allows sensor positioning followed by navigation manoeuvres to adjust lower limb alignment...
April 10, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29644322/conservative-treatment-of-periprosthetic-femur-fractures-around-metaphyseal-short-stems-a-feasible-option
#8
K Toth, H Gality, K Gion, K Sisak
Periprosthetic femoral fractures are rare but significant events following total hip replacement. Metaphyseal short stems have recently been popularized as a bone preserving alternative to conventional uncemented total hip replacement. We present two periprosthetic femur fractures which occurred around two different metaphyseal uncemented stem designs. Successful conservative treatment was possible in both cases achieving bony union and excellent clinical results.
June 2017: Trauma Case Reports
https://www.readbyqxmd.com/read/29643820/the-attribution-of-mental-health-problems-to-jinn-an-explorative-study-in-a-transcultural-psychiatric-outpatient-clinic
#9
Anastasia Lim, Hans W Hoek, Samrad Ghane, Mathijs Deen, Jan Dirk Blom
Background: Among Muslim patients, a common cultural concept of distress is the notion that jinn may be the cause of mental health problems, especially in the presence of hallucinations. Objective: This study examines the frequency with which this attribution style is manifest in a specific psychiatric outpatient population with a Muslim background. Methods: Of all patients registered at an outpatient clinic specialized in transcultural psychiatry, data were collected on folk belief, religion, hallucinations (if present), and medical diagnosis...
2018: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29643496/a-physicist-probes-the-metaphysical
#10
Anil Ananthaswamy
No abstract text is available yet for this article.
April 2018: Nature
https://www.readbyqxmd.com/read/29628714/a-case-report-on-partial-scapulectomy-with-glenoid-preservation-for-chondromyxoid-fibroma-of-scapula
#11
Naba Pallab Chetia, Aritra Bidyananda, Munin Borgohain
Chondromyxoid fibroma is a benign bone tumour accounting for less than 1% of all primary bone tumours. It usually affects the metaphyseal region of long bones in the first or second decade of life. It rarely occurs in scapula. We present a case of 29 year old female with biopsy proven Chondromyxoid fibroma of left scapula. She underwent wide marginal excision by partial scapulectomy with preservation of glenoid. Post operatively she has stable shoulder joint with normal range of movement & no recurrence on regular follow up...
March 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29627848/fixation-augmentation-using-calcium-phosphate-bone-substitute-improves-outcomes-of-complex-tibial-plateau-fractures-a-matched-cohort-study
#12
Matthieu Ollivier, Yassine Bulaïd, Christophe Jacquet, Sebastien Pesenti, Jean-Noel Argenson, Sebastien Parratte
INTRODUCTION: Injectable cements have been developed to improve fixation's stability and thus obtain early return to adequate joint function. We aimed to compare post-operative radiographic and clinical outcomes of patients suffering from a complex tibial plateau fracture (TPF) fixed with calcium-phosphate bone substitutes (CPBS) augmentation to a matched group of patients with identical fracture pattern, treated with the same fixation's type, but augmented with bone grafting. METHODS: After local ethic committee approval, we retrospectively identified in a prospectively collected database, patients with complex comminuted metaphyseal and epiphysial bicondylar TPF (Schatzker type VI) admitted in our emergency department between January 2011 and December 2013...
April 7, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29625813/sidus-stem-free-shoulder-system-for-primary-osteoarthritis-short-term-results-of-a-multicenter-study
#13
Anna Krukenberg, Julie McBirnie, Stefan Bartsch, Nikolaus Böhler, Ernst Wiedemann, Bernhard Jost, Pierre Mansat, Pierre Bellon-Champel, Renzo Angeloni, Markus Scheibel
BACKGROUND: The aim of this prospective multicenter study was to evaluate clinical and radiologic results of a new metaphyseal anchored system. This system features a different anchor geometry that potentially leads to better bony integration and less loosening. METHODS: From November 2012 until December 2015, 148 patients (151 shoulders) were treated with the Sidus Stem-Free Shoulder System at 9 centers in Europe. The main indication was primary osteoarthritis (80...
April 3, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29609774/realizability-and-the-varieties-of-explanation
#14
Philippe Huneman
What realization is has been convincingly presented in relation to the way we determine what counts as the realizers of realized properties. The way we explain a fact of realization includes a reference to what realization should be; therefore it informs in turn our understanding of the nature of realization. Conceptions of explanation are thereby included in the views of realization as a metaphysical property. Recently, several major views of realization such as Polger and Shapiro's or Gillett and Aizawa's, however competing, have relied on the neo-mechanicist theory of explanations (e...
April 2018: Studies in History and Philosophy of Science
https://www.readbyqxmd.com/read/29609771/cognition-wars
#15
Fred Adams
In what kinds of physical systems can cognition be realized? There are currently competing answers among scientists and theorists of cognition. There are many plant scientists who maintain that cognition can be realized in plants. There are biological scientists who maintain that cognition is materially realized in bacteria. In this paper, I will present the basis for such claims and evaluate them and discuss the future for theories of the metaphysical basis of cognition in the cognitive sciences.
April 2018: Studies in History and Philosophy of Science
https://www.readbyqxmd.com/read/29600681/-imaging-findings-of-bone-infarction-in-children-with-systemic-lupus-erythematosus
#16
Yu Zhang, Xiao-Min Duan, Hai-Bing Mei
OBJECTIVE: To investigate diagnostic value of MRI, X ray and CT for bone infarction in children with systemic lupus erythematosus. METHODS: Eleven systemic lupus erythematosus children with bone infarction were retrospectively analyzed from January 2015 to January 2017 , and tested by MRI, X-ray and CT. Among them, including 1 male and 10 females aged from 6 to 16 years old with an average of 13 years old. All patients were detected by MRI, 9 patients were detected by X-ray and 3 patients were detected by CT, imaging findings were analyzed...
March 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29583042/torsional-and-axial-compressive-properties-of-tibiotarsal-bones-of-red-tailed-hawks-buteo-jamaicensis
#17
Shannon M Kerrigan, Amy S Kapatkin, Tanya C Garcia, Duane A Robinson, David Sanchez-Migallon Guzman, Susan M Stover
OBJECTIVE To describe the torsional and axial compressive properties of tibiotarsal bones of red-tailed hawks (Buteo jamaicensis). SAMPLE 16 cadaveric tibiotarsal bones from 8 red-tailed hawks. PROCEDURES 1 tibiotarsal bone from each bird was randomly assigned to be tested in torsion, and the contralateral bone was tested in axial compression. Intact bones were monotonically loaded in either torsion (n = 8) or axial compression (8) to failure. Mechanical variables were derived from load-deformation curves. Fracture configurations were described...
April 2018: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/29578654/typological-thinking-then-and-now
#18
Joeri Witteveen
A popular narrative about the history of modern biology has it that Ernst Mayr introduced the distinction between "typological thinking" and "population thinking" to mark a contrast between a metaphysically problematic and a promising foundation for (evolutionary) biology, respectively. This narrative sometimes continues with the observation that, since the late-20th century, typological concepts have been making a comeback in biology, primarily in the context of evolutionary developmental biology...
March 26, 2018: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/29564042/predictors-of-intraoperative-fractures-during-hemiarthroplasty-for-the-treatment-of-fragility-hip-fractures
#19
Nayef Aslam-Pervez, Osman Riaz, Shivkumar Gopal, Fahad Hossain
Background: The aim of our study was to determine the rate and preoperative predictors of intraoperative fracture (IOF) during hip hemiarthroplasty (HA) in patients who have sustained a fragility hip fracture injury. Methods: We reviewed 626 patients who underwent HA at our institution using the National Hip Fracture Database. Various patient- and surgery-related data including demographic information, cement usage, surgeon grade, time to surgery, and operative duration were collected...
March 2018: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29563069/biological-evaluation-and-finite-element-modeling-of-porous-poly-para-phenylene-for-orthopaedic-implants
#20
Hyunhee Ahn, Ravi R Patel, Anthony J Hoyt, Angela S P Lin, F Brennan Torstrick, Robert E Guldberg, Carl P Frick, R Dana Carpenter, Christopher M Yakacki, Nick J Willett
Poly(para-phenylene) (PPP) is a novel aromatic polymer with higher strength and stiffness than polyetheretherketone (PEEK), the gold standard material for polymeric load-bearing orthopaedic implants. The amorphous structure of PPP makes it relatively straightforward to manufacture different architectures, while maintaining mechanical properties. PPP is promising as a potential orthopaedic material; however, the biocompatibility and osseointegration have not been well investigated. The objective of this study was to evaluate biological and mechanical behavior of PPP, with or without porosity, in comparison to PEEK...
March 18, 2018: Acta Biomaterialia
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