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https://www.readbyqxmd.com/read/29346485/adverse-events-in-facial-implant-surgery-and-associated-malpractice-litigation
#1
Hani M Rayess, Peter Svider, Curtis Hanba, Vivek Sagar Patel, Michael Carron, Giancarlo Zuliani
Importance: Facial implants represent an important strategy for providing instant and long-lasting volume enhancement to address both aging and posttraumatic defects. Objective: To better understand risks of facial implants by examining national resources encompassing adverse events and considerations facilitating associated litigation. Design, Setting, and Participants: A cross-sectional study reviewed complications following facial implants...
January 18, 2018: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/29319895/the-onset-of-fretting-at-the-head-stem-connection-in-hip-arthroplasty-is-affected-by-head-material-and-trunnion-design-under-simulated-corrosion-conditions
#2
Fiachra E Rowan, Amanda Wach, Timothy M Wright, Douglas E Padgett
Mechanically assisted crevice corrosion (MACC) is a mechanism for trunnion damage in total hip arthroplasties (THAs). Retrieval studies have shown reduced MACC-related damage for ceramic heads compared with cobalt-chromium (CoCr) heads. We propose that ceramic heads demonstrate fretting at higher cyclic compressive loads than CoCr heads on titanium alloy trunnions in a simulated corrosion model. A closed electrochemical chamber was used to measure fretting current onset loads for two modern titanium alloy trunnions (Zimmer 12/14 and Stryker V-40) in which trunnion failure has been reported...
January 10, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29310917/mid-term-results-of-graft-augmentation-prosthesis-ii-cage-and-impacted-allograft-bone-in-revision-hip-arthroplasty
#3
Hazem A H Hosny, Ahmed El-Bakoury, Helmy Fekry, Jonathan Keenan
BACKGROUND: Several techniques have been described for management of severe acetabular bone defects during revision hip surgery including reconstructive cages. The purpose of this study is to analyze the survival and the mid-term clinical and radiological outcome using the Graft Augmentation Prosthesis (GAP II cage) (Stryker Orthopaedics, Mahwah, NJ) in addition to impaction grafting for acetabular defects in revision hip surgery. METHODS: This is a retrospective review of all patients who underwent acetabular revision hip replacement using GAP II cage and impaction bone grafting between 2009 and 2013 at our institution...
December 8, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29310147/can-stem-version-consistently-correct-native-femoral-version-using-robotic-guidance-in-total-hip-arthroplasty
#4
Benjamin G Domb, Sivashankar Chandrasekaran, Chengcheng Gui, Leslie C Yuen, Parth Lodhia, Carlos Suarez
The purpose of this study is to investigate whether robotic guidance in total hip arthroplasty (THA) can consistently correct native femoral version. One hundred seventy-five consecutive patients who underwent MAKO® (Stryker, Kalamazoo, Michigan) robotic-guidance THA were included in the study. The study population had a mean age of 57.9 years and a mean body mass index (BMI) of 30.41. Forty-eight percent of the population was male and 74% of the procedures were performed through an anterior approach. Robotic guidance in THA was effective in correcting native femoral version toward a target of 15°...
December 22, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29276536/establishing-the-appropriate-position-of-proximal-humerus-locking-plates-a-cadaveric-study-of-five-plating-systems-and-their-anatomic-reference-measurements
#5
Matthew A Butler, Aakash Chauhan, Gregory A Merrell, Jeffrey A Greenberg
Background: The present study aimed to determine anatomic references for the placement of five proximal humerus locking plates. Methods: Five proximal humerus locking-plate systems were placed on six human shoulder cadavers. Plates were positioned by fluoroscopic confirmation so that the inferior oblique screw was within 5 mm of the inferomedial cortex. Plate position was measured using the superior border of the pectoralis major tendon (PMT) to the bottom of the first slotted or nonlocking hole and top of the plate to the top of the greater tuberosity...
January 2018: Shoulder & Elbow
https://www.readbyqxmd.com/read/29275115/results-of-cemented-vs-cementless-primary-total-knee-arthroplasty-using-the-same-implant-design
#6
Adam J Miller, Jeffrey D Stimac, Langan S Smith, Anthony W Feher, Madhusudhan R Yakkanti, Arthur L Malkani
BACKGROUND: Although cemented total knee arthroplasty (TKA) continues to be the gold standard, there are patient populations with higher failure rates with cemented TKAs such as the obese, morbidly obese, and younger active males. Cementless TKA usage continues to increase because of the potential benefits of long-term biologic fixation similar to the rise in cementless total hip arthroplasty. The purpose of this study was to evaluate the clinical and radiographic results of cementless TKA using a novel highly porous cementless tibial baseplate...
December 2, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29193614/total-synthesis-of-6r-10r-13r-14r-16r-17r-19s-20r-21r-24s-25s-28s-30s-32r-33r-34r-36s-37s-39r-azaspiracid-3-reveals-non-identity-with-the-natural-product
#7
Craig J Forsyth, Nathaniel T Kenton, Daniel Adu-Ampratwum, Antony A Okumu, Zhigao Zhang, Yong Chen, Son Nguyen, Jianyan Xu, Yue Ding, Pearse McCarron, Jane Kilcoyne, Frode Rise, Alistair L Wilkins, Christopher O Miles
A convergent and stereoselective total synthesis of the previously assigned structure of azaspiracid-3 has been achieved via a late stage NHK coupling to form the C21-C22 bond with the C20 configuration unambiguously established from L-(+)-tartaric acid. Post-coupling steps involved oxidation to an ynone, modified Stryker reduction of the alkyne, global deprotection, and oxidation of the primary alcohol to the carboxylic acid. The synthetic product matched naturally occurring azaspiracid-3 by mass spectrometry, but differed both chromatographically and spectroscopically...
November 28, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29173817/adaptive-bone-remodeling-with-new-design-of-the-abg-stem-densitometric-study
#8
Jorge López-Subías, Juan J Panisello, Jesús M Mateo-Agudo, Marina Lillo-Adán, Antonio Herrera
To establish the pattern of bone remodeling caused by a cementless, anatomic implant, we intend to evaluate the changes in bone mineral density observed after surgery in the Gruen zones. A controlled, prospective study was carried out, in which a group of 37 patients with primary coxarthrosis were densitrometrically analyzed over the 1 year period following the implant of an ANATO stem (Stryker). The patient's healthy hip was taken as the control. Any differences in the remodeling pattern were compared according to age, body mass index, and implant size...
September 28, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/29172300/clinical-and-radiographic-short-mid-term-outcomes-of-primary-total-stabilizer-knee-arthroplasty
#9
E Bonicoli, N Piolanti, M Giuntoli, S Polloni, G Ciapini, P D Parchi, M Scaglione
A successful Total Knee Arthroplasty (TKA) requires stability, but rarely in primary TKA, a prosthesis with more constraint than a posterior-stabilizer (PS) is necessary. In patients with severe varus/valgus deformities with incompetent collateral ligaments or in knees that cannot be adequately balanced after ligaments release, a total-stabilizer (TS) prosthesis may be required. The purpose of our retrospective study is to evaluate clinical and radiographic outcomes at short mid-term follow-up in patients treated with a TS TKA...
October 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29152840/on-the-use-of-bolus-for-pacemaker-dose-measurement-and-reduction-in-radiation-therapy
#10
Huagang Yan, Fanqing Guo, Dengsong Zhu, Stefan Stryker, Sharron Trumpore, Kenneth Roberts, Susan Higgins, Ravinder Nath, Zhe Chen, Wu Liu
Special attention is required in planning and administering radiation therapy to patients with cardiac implantable electronic devices (CIEDs), such as pacemaker and defibrillator. The range of dose to CIEDs that can induce malfunction is large among CIEDs. Clinically significant defects have been reported at dose as low as 0.15 Gy. Therefore, accurate estimation of dose to CIED and dose reduction are both important even if the dose is expected to be less than the often-used 2-Gy limit. We investigated the use of bolus in in vivo dosimetry for CIEDs...
November 20, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29145969/late-postoperative-analysis-of-the-tip-apex-distance-tad-in-pertrochanteric-fractures-is-there-an-accommodation-of-the-implant-within-the-bone
#11
Leandro Jun Aihara, Rafael Augusto Nanni, Marina Sousa Carvalho, Caio Zamboni, Jorge R Durigan, José S Hungria Neto, Marcelo T Mercadante, Ralph W Christian, José O S Hungria
INTRODUCTION: This study measured the tip-apex distance (TAD) values in the immediate postoperative period and following weight-bearing and fracture impaction in patients undergoing osteosynthesis with dynamic hip screw and cephalomedullary nail. OBJECTIVE: To correlate the Baumgaertner index in the immediate postoperative period with values obtained after impaction of the fracture with the accommodation of the cephalic implant in the femoral head. PATIENTS AND METHODS: Radiographic TAD measurements were taken with AGFA-VIEW(®) of 82 patients with a mean age of 72 years with pertrochanteric fractures who were operated on and the fracture fixed with DHS- Synthes(®), TFN-Synthes(®), or Gamma Nail III-Stryker(®) in the immediate postoperative period, and following weight-bearing and fracture impaction (mean 3-8 weeks after surgery)...
October 2017: Injury
https://www.readbyqxmd.com/read/29145010/the-use-of-hardened-bone-cement-as-an-impaction-grafting-extender-for-revision-hip-arthroplasty
#12
Mark Ruddy, David P FitzPatrick, Kenneth T Stanton
Impaction bone grafting is a method of restoring bone stock to patients who have suffered significant bone loss due to revision total hip surgery. The procedure requires morsellised cancellous bone (MCB) to be impacted into the site of bone loss in order to stabilise the prosthesis with the aim of long term resorption and reintegration of the impacted bone graft. Due to financial cost and the potential to transmit disease, the use of supplementary material, known as an extender, is frequently used to increase the graft material volume...
November 13, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29129157/thrombectomy-6-to-24-hours-after-stroke-with-a-mismatch-between-deficit-and-infarct
#13
Raul G Nogueira, Ashutosh P Jadhav, Diogo C Haussen, Alain Bonafe, Ronald F Budzik, Parita Bhuva, Dileep R Yavagal, Marc Ribo, Christophe Cognard, Ricardo A Hanel, Cathy A Sila, Ameer E Hassan, Monica Millan, Elad I Levy, Peter Mitchell, Michael Chen, Joey D English, Qaisar A Shah, Frank L Silver, Vitor M Pereira, Brijesh P Mehta, Blaise W Baxter, Michael G Abraham, Pedro Cardona, Erol Veznedaroglu, Frank R Hellinger, Lei Feng, Jawad F Kirmani, Demetrius K Lopes, Brian T Jankowitz, Michael R Frankel, Vincent Costalat, Nirav A Vora, Albert J Yoo, Amer M Malik, Anthony J Furlan, Marta Rubiera, Amin Aghaebrahim, Jean-Marc Olivot, Wondwossen G Tekle, Ryan Shields, Todd Graves, Roger J Lewis, Wade S Smith, David S Liebeskind, Jeffrey L Saver, Tudor G Jovin
Background The effect of endovascular thrombectomy that is performed more than 6 hours after the onset of ischemic stroke is uncertain. Patients with a clinical deficit that is disproportionately severe relative to the infarct volume may benefit from late thrombectomy. Methods We enrolled patients with occlusion of the intracranial internal carotid artery or proximal middle cerebral artery who had last been known to be well 6 to 24 hours earlier and who had a mismatch between the severity of the clinical deficit and the infarct volume, with mismatch criteria defined according to age (<80 years or ≥80 years)...
November 11, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29122305/reconstruction-of-cranioplasty-using-medpor-porouspolyethylene-implant
#14
B Marlier, J-C Kleiber, M Bannwarth, E Theret, C Eap, C F Litre
INTRODUCTION: We describe our experience of cranioplasty after a calvarial defect, following an external decompressive craniectomy, with the Medpor® (Stryker®) porous polyethylene implant for cosmetic cranioplasty and reconstruction. METHODS: A retrospective chart review was performed on 23 consecutive patients who underwent cranioplasty at a single institution between January 2013 and January 2016: 9 patients after head injury and 14 patients after vascular event (ruptured aneurysm, intraprenchymal haematoma, malignant cerebrovascular accident)...
December 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/29118797/comparison-of-vacuum-pressures-and-forces-generated-by-different-catheters-and-pumps-for-aspiration-thrombectomy-in-acute-ischemic-stroke
#15
Michael T Froehler
Background: Direct aspiration thrombectomy is an increasingly utilized technique in endovascular stroke treatment that relies on vacuum and suction force to remove the clot. This report assesses the pressures and forces generated by different catheters and pumps. Methods: Vacuum pressures were measured using a vacuum gauge for several catheters (Stryker Catalyst6, Penumbra Ace 064, Medtronic Arc 061, and Penumbra 041) and pumps (Penumbra pump, 60-mL syringe, and the ASPIRE device)...
October 2017: Interventional Neurology
https://www.readbyqxmd.com/read/29098302/-analysis-of-the-accuracy-of-fit-of-five-anatomically-precontoured-clavicle-plate-systems
#16
Johannes Oppermann, Linda Ettmann, Carolin Meyer, Christian Ries, Gregor Stein, Christian Karl Spies, Lars Peter Müller, Christoph Faymonville
BACKGROUND: A common method in surgical treatment of midshaft clavicular fractures is the clavicle plating system. In addition to traditional osteosynthetic devices, anatomically preformed plate systems also exist. Advantages are described in greater accuracy of fit and less irritation of surrounding soft tissues. The purpose of this study was to compare the anatomical fit of five different precontoured clavicle plating systems. MATERIAL AND METHODS: The anatomical fit of five different types of anatomical precontoured clavicle plates, 3 times VariaxSystem® (Stryker, Kalamazoo, MI), Meves® Plate (Ulrich medical Ulm, Germany) and LCP clavicle plate (Synthes, Bettlach, Switzerland) were investigated in 20 embalmed human cadaveric clavicles...
November 2, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29089224/is-cross-linked-polyethylene-an-improvement-over-conventional-ultra-high-molecular-weight-polyethylene-in-total-knee-arthroplasty
#17
Bertrand Boyer, Barbara Bordini, Dalila Caputo, Thomas Neri, Susanna Stea, Aldo Toni
BACKGROUND: Reducing polyethylene (PE) wear by increasing the cross-linking encouraged surgeons to hope for increased total knee arthroplasty (TKA) survival rates. Different methods of manufacturing cross-linked polyethylene (XLPE) were introduced, following promising in vitro results. Is there a measurable effect of cross-linking on TKA survival? METHODS: A registry study was conducted, focusing on fixed tibial inserts in primary TKA. Conventional PE represented 87% of the liners, 10% were cross-linked and 2% were antioxidant PE...
October 10, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29081013/emerging-technologies-in-flow-diverters-and-stents-for-cerebrovascular-diseases
#18
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/29046314/respiratory-dysfunction-following-neonatal-sustained-hypoxia-exposure-during-a-critical-window-of-brainstem-extracellular-matrix-formation
#19
Christopher Stryker, Dominic W Camperchioli, Catherine A Mayer, Warren J Alilain, Richard John Martin, Peter M MacFarlane
The extracellular matrix (ECM) modulates brain maturation and plays a major role in regulating neuronal plasticity during critical periods of development. We examined: 1) whether there is a critical postnatal period of ECM expression in brainstem cardio-respiratory control regions; and 2) if the attenuated hypoxic ventilatory response (HVR) following neonatal sustained (5 days) hypoxia exposure (SH, 11% O2, 24hrs/day) is associated with altered ECM formation. The nucleus tractus solitarius (nTS), dorsal motor nucleus of the vagus (DMNV), the hypoglossal motor nucleus (XII), the cuneate nucleus (CN) and area postrema (AP) were immunofluorescently processed for aggrecan and Wisteria floribunda (WFA) agglutinin, a key proteoglycan of the ECM and the perineuronal net...
October 18, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28936610/tight-fitting-radial-head-prosthesis-does-stem-size-help-prevent-painful-loosening
#20
Pierre Laumonerie, Nicolas Reina, Claudia Gutierrez, Stephanie Delclaux, Meagan E Tibbo, Nicolas Bonnevialle, Pierre Mansat
INTRODUCTION: The most common reason for removal of well-fixed radial head prostheses is painful loosening. We hypothesised that short-stemmed prostheses, used for radial head arthroplasty, are not associated with an increased risk of implant loosening. METHODS: From 2002 to 2014, 65 patients were enrolled in a retrospective single-centre study. The radial head prostheses were classified as having either a long (30-mm) or short (16- to 22-mm) stem. The long-stemmed implants comprised 30 GUEPAR® DePuy Synthes (West Chester, PA, USA) and 20 Evolutive® Aston Medical (Saint-Etienne, France) devices; the short-stemmed implants comprised nine RECON and six STANDARD rHead® SBI-Stryker (Morrisville, PA, USA) devices...
September 21, 2017: International Orthopaedics
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