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https://www.readbyqxmd.com/read/29327546/-bone-mineral-density-decreased-is-a-high-risk-factor-for-uncemented-acetabular-cups-migration-in-female-total-hip-arthroplasty-patients
#1
Jia Liu, Jiang Deng, Xiao-Song Han, Lin Xu
OBJECTIVE: To investigate the decrease of bone mineral density in female patients, effects on acetabular displacement. METHODS: From October 2013 to November 2015, a total of 34 patients underwent total hip replacement in the Department of orthopedics, the Third Affiliated Hospital of Zunyi Medical College. The two groups of patients were female and the patients were treated with hip osteoarthritis. Based on the lowest value of preoperative dual energy X-ray bone mineral density (DXA), the patients were divided into normal group and low bone mineral density(-3...
January 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29318087/treatment-with-helical-blade-cephalomedullary-nail-for-two-part-basicervical-proximal-femoral-fracture-in-elderly-patients-a-retrospective-observational-study
#2
Ichiro Okano, Takatoshi Sawada, Nobumasa Kushima, Tetsuya Tachibana, Katsunori Inagaki
Background: Basicervical proximal femoral fracture is a known subtype of extracapsular fracture and is mechanically unstable, especially for the rotational direction, which may lead to implant failure. A cephalomedullary nail (CMN) is widely used for the fixation of unstable extracapsular fracture; however, its application for basicervical fracture remains controversial. Helical blade CMN is proven to have more rotational stability than traditional lag screw implants and potentially advantageous in the treatment of basicervical fracture...
December 2017: Geriatric Orthopaedic Surgery & Rehabilitation
https://www.readbyqxmd.com/read/29282027/polyaxial-locking-plates-in-treating-distal-humeral-fractures-a-comparative-randomized-trial-for-clinical-outcome
#3
Moritz Crönlein, Martin Lucke, Marc Beirer, Dominik Pförringer, Chlodwig Kirchhoff, Peter Biberthaler, Karl F Braun, Sebastian Siebenlist
BACKGROUND: Management of distal humeral fractures remains to be one of the most challenging aspects in trauma surgery. Low profile plating systems with variable angle screw fixation represent a crucial advancement to the established angular stable locking plates with considerable attention in current research. The aim of the prospective randomized trial was to review the preliminary results and patients' outcome following treatment with these newly developed implants and to rule out potential differences in fracture treatment of two different plating systems...
December 28, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29258356/grave-fraudulence-in-medical-device-research-a-narrative-review-of-the-pin-seeding-study-for-the-pinnacle-hip-system
#4
Joan E Steffen, Ella A Fassler, Kevin J Reardon, David S Egilman
In 2001, DePuy, a wholly-owned subsidiary of Johnson & Johnson (J&J/DePuy), initiated a seeding study called the "Multi-center, Prospective, Clinical Evaluation of Pinnacle Acetabular Implants in Total Hip Arthroplasty" (PIN Study). J&J/DePuy designed this study to develop new business opportunities during the launch of their Pinnacle Hip System (PHS) and generate survivorship data for marketing. This article, the first review of a seeding trial for a medical device, examines internal company documents relating to the PIN Study; the analysis herein focuses on the integrity of J&J/DePuy's research practices in conception, implementation, and analysis...
2018: Accountability in Research
https://www.readbyqxmd.com/read/29246716/clinical-performance-patient-reported-outcome-and-radiological-results-of-a-short-tapered-porous-proximally-coated-cementless-femoral-stem-results-up-to-seven-years-of-follow-up
#5
Michele Ulivi, Luca C Orlandini, Valentina Meroni, Michele D M Lombardo, Giuseppe M Peretti
BACKGROUND: The primary aim of our study was to assess clinical performance, patient reported outcome and radiological results of cementless primary total hip arthroplasty using Tri-Lock Bone Preservation Stem. METHODS: Between March 2010 and June 2012, 163 consecutive patients, were enrolled in the study. Patients were assessed clinically and radiographically prior to surgery as well as at 6, 12, 24 months and then at 5, 6, and 7 years postoperatively. RESULTS: Using the Dorr classification, 39 patients (23...
December 2, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29200483/biomechanical-analysis-of-range-of-motion-and-failure-characteristics-of-osteoporotic-spinal-compression-fractures-in-human-cadaver
#6
Robert F Heary, Naresh K Parvathreddy, Nitin Agarwal
Background: Vertebroplasty is a treatment for osteoporotic vertebral compression fractures. The optimal location of needle placement for cement injection remains a topic of debate. As such, the authors assessed the effects of location of two types of cement instillations. In addition, the motion and failure modes at the index and adjacent segments were measured. Materials and Methods: Seven human osteoporotic cadaver spines (T1-L4), cut into four consecutive vertebral segments, were utilized...
November 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/29195220/a-comprehensive-combined-experimental-and-computational-framework-for-pre-clinical-wear-simulation-of-total-knee-replacements
#7
A Abdelgaied, J Fisher, L M Jennings
A more robust pre-clinical wear simulation framework is required in order to simulate wider and higher ranges of activities, observed in different patient populations such as younger more active patients. Such a framework will help to understand and address the reported higher failure rates for younger and more active patients (National_Joint_Registry, 2016). The current study has developed and validated a comprehensive combined experimental and computational framework for pre-clinical wear simulation of total knee replacements (TKR)...
November 17, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29192734/wear-rate-and-medium-term-survival-of-a-cemented-moderately-cross-linked-polyethylene-acetabular-prosthesis
#8
Bilal M Barkatali, Dinesh P Alexander, Anil K Gambhir, Henry Wynn Jones, Tim N Board
INTRODUCTION: The moderately cross-linked Depuy Marathon® cemented acetabular component was introduced into the UK in 2007. The wear rate for the previously introduced Marathon® uncemented acetabular component has been reported to range from 0.06 to 0.01 mm/year.The aim of this study was to present the medium-term results and wear rate of the Marathon® cemented prosthesis used in primary total hip arthroplasty. METHODS: 103 Marathon® cemented acetabular components were implanted between 2008 and 2009 in primary arthroplasty, who were eligible for this study...
December 1, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29174405/mixing-of-head-stem-components-in-total-hip-arthroplasty
#9
Ulrike Mueller, Benjamin Panzram, Steffen Braun, Robert Sonntag, J Philippe Kretzer
BACKGROUND: Implant manufacturers proclaim that the tapers of modular total hip arthroplasty are not standardized and can vary from manufacturer to manufacturer. That is why the combination of various components from different manufacturers ("Mix and Match") is not permitted. In this study, different taper combinations were investigated experimentally to assess the effect of "Mix and Match" regarding the taper connection strength. METHODS: Torque-off tests using hip stems and metal femoral heads from 6 different implant manufacturers were performed...
November 1, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29117828/dual-plating-technique-for-volar-rim-fracture-of-the-distal-radius-using-depuy-synthes-2-0-m-and-2-4-mm-locking-plates
#10
Yoshihiro Abe, Masahiro Suzuki, Hiromasa Wakita
BACKGROUND: To assess the surgical results of distal radius fractures with the involvement of a volar rim fragment using the DePuy-Synthes 2.0 mm and 2.4 mm locking plates. METHODS: Subjects were six women and one man of average age 57 years (range, 31-83 y) and a mean follow-up period of 9 months (range, 5-19 mo) with AO B3 (volar shearing) distal radius fractures. Time of the procedure, physical examination of wrist range of motion, grip strength compared with the contralateral healthy wrist, and radiographic evaluation (volar tilt, radial inclination, and ulnar variance) were evaluated...
December 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/29098102/compression-of-the-femoral-vessels-by-a-pseudotumor-after-metal-on-metal-total-hip-arthroplasty
#11
Yasuaki Tamaki, Tomohiro Goto, Takahiko Tsutsui, Tomoya Takasago, Keizo Wada, Koichi Sairyo
Here we present a case of pseudotumor following total hip arthroplasty (THA) that resulted in a circulatory disturbance caused by compression of the femoral vasculature. A 63-year-old man presented with pain, swelling, and redness of the left leg 5 years after primary metal-on-metal THA using the AML-Plus stem, Pinnacle® acetabular cup, and 36 mm diameter Ultamet™ metal head system (DePuy Orthopaedics, Warsaw, IN). Enhanced computed tomography and magnetic resonance imaging revealed a large cystic lesion extending from the left hip anteriorly to the intrapelvic region and compressing the left femoral vessels...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/29096930/long-term-radiographic-appearance-of-calcium-phosphate-synthetic-bone-grafts-after-surgical-treatment-of-tibial-plateau-fractures
#12
Alexander Hanke, Martin Bäumlein, Siegmund Lang, Boyko Gueorguiev, Michael Nerlich, Thomas Perren, Paavo Rillmann, Christian Ryf, Theodore Miclau, Markus Loibl
OBJECTIVES: Synthetic bone grafts (SBGs) are widely used to fill bone defects after fracture reduction. This study assessed the long-term resorption of two different calcium phosphate products (A=ChronOS™ inject and B=Norian(®) SRS(®); both DePuy Synthes, Oberdorf, Switzerland) used in the surgical treatment of tibial plateau fractures. DESIGN: Long-term clinical and radiologic follow-up of 52 patients after surgical treatment of intraarticular tibial plateau fractures augmented with SBGs...
October 19, 2017: Injury
https://www.readbyqxmd.com/read/29081013/emerging-technologies-in-flow-diverters-and-stents-for-cerebrovascular-diseases
#13
REVIEW
Michael Karsy, Jian Guan, Andrea A Brock, Anubhav Amin, Min S Park
PURPOSE OF REVIEW: Stents and flow diverters have revolutionized the treatment of cerebrovascular disease. Guglielmi coils, flexible microcatheters, and first-generation intracranial stents, such as Neuroform (Stryker Neurovascular) and Enterprise stents (Codman/DePuy-Synthes), have paved the way for the development of the Pipeline Embolization Device (PED) (ev3/Covidien/Medtronic) and other endovascular approaches. RECENT FINDINGS: This review discusses the historical development of flow diverter technologies from the PED to similar devices, such as the Surpass stent (Stryker Neurovascular), the Flow-Redirection Endoluminal Device (FRED; MicroVention, Inc...
October 28, 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/29072088/the-association-between-cement-type-and-the-subsequent-risk-of-revision-surgery-in-primary-total-hip-replacement
#14
Lea Trela-Larsen, Adrian Sayers, Ashley William Blom, Jason Crispin John Webb, Michael Richard Whitehouse
Background and purpose - To further improve the success of joint replacement surgery, attention needs to be paid to variations associated with improved or worsened outcomes. We investigated the association between the type of bone cement used and the risk of revision surgery after primary total hip replacement. Methods - We conducted a prospective study of data from the National Joint Registry for England and Wales between April 1, 2003 and December 31, 2013. 199,205 primary total hip replacements performed for osteoarthritis where bone cement was used were included...
October 26, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/29040124/highly-cross-linked-polyethylene-reduces-wear-and-revision-rates-in-total-hip-arthroplasty-a-10-year-double-blinded-randomized-controlled-trial
#15
RANDOMIZED CONTROLLED TRIAL
Peter A Devane, James Geoffrey Horne, Alexander Ashmore, Jonathon Mutimer, Woosung Kim, James Stanley
BACKGROUND: Highly cross-linked polyethylene (XLPE) was developed to address the problem of wear and osteolysis associated with metal-on-conventional ultra-high molecular weight polyethylene (UHMWPE) bearing surfaces. The purpose of this study was to compare in vivo wear rates and clinical and radiographic outcomes between XLPE and UHMWPE in a prospective double-blinded randomized controlled trial with a minimum of 10 years of follow-up. METHODS: We randomized 122 patients to receive either a conventional UHMWPE liner (Enduron; DePuy) or an XLPE liner (Marathon; DePuy)...
October 18, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29032308/comparison-of-mode-of-failure-between-primary-and-revision-total-knee-arthroplasties
#16
H Liang, J K Bae, C H Park, K I Kim, D K Bae, S J Song
INTRODUCTION: Cognizance of common reasons for failure in primary and revision TKA, together with their time course, facilitates prevention. However, there have been few reports specifically comparing modes of failure for primary vs. revision TKA using a single prosthesis. The goal of the study was to compare the survival rates, modes of failure, and time periods associated with each mode of failure, of primary vs. revision TKA. HYPOTHESIS: The survival rates, modes of failure, time period for each mode of failure, and risk factors would differ between primary and revision TKA...
October 12, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29019902/in-vitro-biomechanical-comparison-after-fixed-and-mobile-core-artificial-cervical-disc-replacement-versus-fusion
#17
COMPARATIVE STUDY
Jigang Lou, Yuanchao Li, Beiyu Wang, Yang Meng, Tingkui Wu, Hao Liu
In vitro biomechanical analysis after cervical disc replacement (CDR) with a novel artificial disc prosthesis (mobile core) was conducted and compared with the intact model, simulated fusion, and CDR with a fixed-core prosthesis. The purpose of this experimental study was to analyze the biomechanical changes after CDR with a novel prosthesis and the differences between fixed- and mobile-core prostheses.Six human cadaveric C2-C7 specimens were biomechanically tested sequentially in 4 different spinal models: intact specimens, simulated fusion, CDR with a fixed-core prosthesis (Discover, DePuy), and CDR with a mobile-core prosthesis (Pretic-I, Trauson)...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28971085/radiographic-evaluation-of-cementation-technique-using-polished-conical-triple-tapered-femoral-stem-in-hip-arthroplasty
#18
Ademir Antônio Schuroff, Mark Deeke, Marco Antônio Pedroni, Fernando Silva Lupselo, Rodrigo Ernesto Kunz, Alexandre Matos Lima
OBJECTIVE: To radiographically evaluate the quality of cementation and implantation technique using a polished, triple-tapered femoral stem in total hip arthroplasty (THA). METHOD: Retrospective study with radiographic evaluation of 86 hips in 83 patients who underwent to primary THA with the triple-tapered cemented femoral stem C-Stem (DePuy Orthopedics, Warsaw, Indiana). Cases with at least one-year of follow-up were included, and data related to preoperative, immediate postoperative, and late postoperative radiographic evolution were recorded...
2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28943180/cad-cam-plates-versus-conventional-fixation-plates-for-primary-mandibular-reconstruction-a-biomechanical-in%C3%A2-vitro-analysis
#19
Carsten Rendenbach, Kay Sellenschloh, Lucca Gerbig, Michael M Morlock, Benedicta Beck-Broichsitter, Ralf Smeets, Max Heiland, Gerd Huber, Henning Hanken
BACKGROUND: CAD/CAM reconstruction plates have become a viable option for mandible reconstruction. The aim of this study was to determine whether CAD/CAM plates provide higher fatigue strength compared with conventional fixation systems. MATERIAL AND METHODS: 1.0 mm miniplates, 2.0 mm conventional locking plates (DePuy Synthes, Umkirch, Germany), and 2.0 mm CAD/CAM plates (Materialise, Leuven, Belgium/DePuy Synthes) were used to reconstruct a polyurethane mandible model (Synbone, Malans, CH) with cortical and cancellous bone equivalents...
November 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28940776/influence-of-collars-on-the-primary-stability-of-cementless-femoral-stems-a-finite-element-study-using-a-diverse-patient-cohort
#20
Rami M A Al-Dirini, Daniel Huff, Ju Zhang, Thor Besier, John G Clement, Mark Taylor
For cementless femoral stems, there is debate as to whether a collar enhances primary stability and load transfer compared to collarless designs. Finite Element (FE) analysis has the potential to compare stem designs within the same cohort, allowing for subtle performance differences to be identified, if present. Subject-specific FE models of intact and implanted femora were run for a diverse cohort (21 males, 20 females; BMI 16.4-41.2 kg/m(2) , age 50-80 yrs). Collared and collarless versions of Corail(®) (DePuy Synthes, Warsaw, IN) were sized and positioned using an automated algorithm that aligns the femoral/stem axes, preserves the head-center location, and maximizes metaphyseal fit...
September 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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