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Łukasz Łapaj, Adrian Mróz, Paweł Kokoszka, Jacek Markuszewski, Justyna Wendland, Celina Helak-Łapaj, Jacek Kruczyński
Background and purpose - Severe backside wear, observed in older generations of total knee replacements (TKRs), led to redesign of locking mechanisms to reduce micromotions between tibial tray and inlay. Since little is known about whether this effectively reduces backside wear in modern designs, we examined backside damage in retrievals of various contemporary fixed-bearing TKRs. Patients and methods - A consecutive series of 102 inlays with a peripheral (Stryker Triathlon, Stryker Scorpio, DePuy PFC Sigma, Aesculap Search Evolution) or dovetail locking mechanism (Zimmer NexGen, Smith and Nephew Genesis II) was examined...
October 26, 2016: Acta Orthopaedica
Sonika Patel, Carl T Talmo, Sumon Nandi
BACKGROUND: Taper corrosion at the modular junctions of total hip arthroplasty (THA) femoral stems are known to cause locally destructive adverse local tissue reaction (ALTR). However, the implants at risk remain to be fully elucidated. CASE REVIEW: We report the case of a 76-year-old woman with hip pain, abductor weakness, and sciatic nerve symptoms 2 years following metal-on-polyethylene THA. Serum cobalt levels were elevated, while chromium levels were normal...
October 15, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
Naveen Sharma, Avinash Mandloi, Ashish Agrawal, Shailendra Singh
INTRODUCTION: The clavicle, humerus and acromioclavicular (AC) joint separately are very commonly involved in traumatic injuries around the shoulder. Acromioclavicular joint dislocation with distal clavicle fracture is a well recognized entity in clinical practice. AC joint dislocation with mid shaft clavicle fracture is uncommon and only few cases have been reported in literature. However, to the best of our knowledge, this is the first case report to describe an acromioclavicular dislocation with ipsilateral mid shaft clavicle, mid shaft humerus and coracoid process fracture...
April 2016: Journal of Orthopaedic Case Reports
Christopher Hein, Serkan Inceoglu, David Juma, Lee Zuckerman
OBJECTIVES: Cortical bone drilling for preparation of screw placement is common in multiple surgical fields. The heat generated while drilling may reach thresholds high enough to cause osteonecrosis. This can compromise implant stability. Orthopedic drill bits are several orders more expensive than their similarly sized, publicly available industrial counterparts. We hypothesize an industrial bit will generate less heat during drilling, and the bits will not generate more heat after multiple cortical passes...
September 24, 2016: Journal of Orthopaedic Trauma
M Chillemi, G Placella, A Caraffa, G Cerulli, P Antinolfi
PURPOSE: The aim of this study is a radiographic evaluation and to determine serologic values of chromium and cobalt in the blood and urine of patients who have been implanted with a Stryker(®) ABG II Modular Neck and see if there is correlation with the features of prosthesis and patients. METHODS: The study involves the collection of data from patients operated on for total hip model with the ABG II Modular Neck with a minimum follow-up of 1 year. RESULTS: We evaluated 22 patients who underwent implantation of a hip prosthesis with modular neck in CoCr...
September 28, 2016: Musculoskeletal Surgery
Angela S P Lin, Chelsea M Fechter, Mark Magill, Felix Wipf, Thomas Moore, Robert E Guldberg
BACKGROUND: Metallic reconstruction plates used for fracture stabilization typically require intraoperative contouring for patient-specific anatomical fit. Despite this, characterization of plate mechanical properties after contouring has previously been limited. The objective of this study was to assess whether contouring affects fatigue resistance for three types of Stryker seven-hole stainless steel (SS) 316LVM fracture fixation plates. The hypothesis was that for each plate type, more contouring repetitions would result in lower fatigue resistance...
September 26, 2016: Journal of Orthopaedic Surgery and Research
Alberto V Carli, Lucian C Warth, Karen L de Mesy Bentley, Bryan J Nestor
BACKGROUND: Several acetabular components utilizing novel ultraporous metal substrates have been introduced over the past decade. Collectively by design, they have a lower modulus of elasticity to reduce stress shielding, a higher coefficient of friction to enhance interference fit, and ultraporous surfaces to enhance osseointegration. However, little literature exists regarding their clinical performance. METHODS: This study compared the clinical and radiographic results of 109 hips in 95 patients using a Tritanium primary cup (Stryker, Mahwah, NJ) to an age, body mass index, and gender-matched cohort of 100 patients that received a contemporary cup (Stryker Trident PSL HA)...
August 8, 2016: Journal of Arthroplasty
Lucas Werth, Mo Saffarini, Felix Amsler, Ashraf Abdelkafy, Michael T Hirschmann
PURPOSE: The purpose of the study was to compare the rate of secondary resurfacing in a consecutive series of five different total knee arthroplasty (TKA) systems. It was our hypothesis that different TKA design features such as sulcus angle or trochlear height influence the rate of secondary resurfacing. METHODS: A retrospective study was performed on data from patients who underwent TKA without primary patellar resurfacing from 2004 to 2012 in an university-affiliated hospital...
September 13, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
N Kaku, T Tabata, H Tsumura
PURPOSE: To compare the past and present bipolar hip arthroplasty (BHA) models in terms of balance between pull-out strength and oscillation angle (OA). METHODS: The pull-out strength and OA of 8 BHA models were compared: UPF-II, IBC, and Tandem XLPE (Smith & Nephew); Ringloc x (Biomet); J-FX (DePuy); Bipolar (Nakashima Medical); Multipolar (Zimmer); and Centrax (Stryker). RESULTS: Respectively for the UPF-II, IBC, Tandem, Ringloc, J-FX, Nakashima Bipolar, Multipolar, and Centrax, the mean pull-out strength was 2219 N, 3303 N, 1503 N, 951 N, 1453 N, 1856 N, 1536 N, and 753 N, whereas the mean OA was 54...
August 2016: Journal of Orthopaedic Surgery
Caroline A Yao, Jordan Swanson, Meghan McCullough, Trisa B Taro, Ricardo Gutierrez, Allison Bradshaw, Alex Campbell, William P Magee, William P Magee
BACKGROUND: The emphasis on cultural competency for physicians and surgeons is increasingly important, as communication with both patients and other providers significantly affects individual and system-wide outcomes. International surgical training has been shown to improve leadership skills, cultural competency, and technical proficiency of participants in short-term follow-up. This study explores the long-term impact of international surgical mission experiences on developing participants' core competencies, professional outcomes, and commitment to global health...
September 2016: Plastic and Reconstructive Surgery
Jenaro Ángel Fernández-Valencia, Xavier Gallart, Guillem Bori, Juan Miguel Rodríguez-Roiz, Andreu Combalia
A retrospective study was performed to evaluate the cement mantle in two groups of patients treated with the acetabular components of cemented Exeter total hip arthroplasties (THAs). Two groups of 20 patients were compared: Group 1 received non-flanged acetabular cemented cups (Contemporary, Stryker) and Group 2 received flanged acetabular cemented cups (X3 Rim Fit, Stryker). Cups in Group 2 were implanted after using a rim cutter device. Group 2 showed better penetration of cement in zone 1 (10.76 mm compared with 2...
August 22, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Nam L Dinh, Alexander Cm O'Chong, Justin K Walden, Scott C Adrian, Robert P Cusick
BACKGROUND: With the advent of new bone cements with different viscosities, it is important to understand how they respond to different cementing techniques. The purpose of this study was to evaluate the high viscosity (HV) bone cement intrusion characteristics comparing negative pressure intrusion technique (NPI) and finger-packing technique in a cadaveric proximal tibial bone. METHODS: Soft tissues were removed from twenty- four fresh frozen cadaver proximal tibiae, and standard arthroplasty tibial cuts were performed...
2016: Iowa Orthopaedic Journal
Sujith Konan, Fares S Haddad
BACKGROUND: Patellofemoral arthroplasties have been successfully used in the management of isolated patellofemoral joint (PFJ) osteoarthritis (OA). We hypothesized that in posttraumatic PFJ OA, isolated unicompartmental arthroplasty should be associated with reliable pain relief, patient satisfaction, and functional outcome at midterm follow-up. METHODS: Fifty-one Avon PFJ (Stryker, Mahwah, NJ) isolated unicompartmental arthroplasties (47 patients; 29 men, 18 women) were identified at a mean follow-up of 7...
July 13, 2016: Journal of Arthroplasty
Saturnino Luján, Ramón Rogel, Enrique Broseta, Francisco Boronat
INTRODUCTION: Penile prosthesis (PP) is the established treatment for patients with erectile dysfunction (ED) who do not respond to phosphodiesterase inhibitors and intracavernosal injections. In general, these devices have been largely successful but there are not free of serious complication such as PP infection (PPI). PPI requires immediate surgical removal or salvage rescue of the PP. AIM: In this report, we present two clinical cases with inflatable PP (IPP) treated locally with antibiotic and high pressure irrigation and then avoid the PP removal or salvage rescue...
July 30, 2016: Sexual Medicine
Diane Corcoran Nielsen, Barbara Luetke, Meigan McLean, Deborah Stryker
Research suggests that English-language proficiency is critical if students who are deaf or hard of hearing (D/HH) are to read as their hearing peers. One explanation for the traditionally reported reading achievement plateau when students are D/HH is the inability to hear insalient English morphology. Signing Exact English can provide visual access to these features. The authors investigated the English morphological and syntactic abilities and reading achievement of elementary and middle school students at a school using simultaneously spoken and signed Standard American English facilitated by intentional listening, speech, and language strategies...
2016: American Annals of the Deaf
Ross O Downes
INTRODUCTION: The consensus about whether the single port approach is advantageous remains controversial. As the ambulatory service becomes the standard of care, techniques are in evolution to augment the patient experience in this setting. This forms the basis for evaluating SILS (Single Incision Laparoscopic Surgery) prosthetic ventral hernia repair in the ambulatory setting. We report a SILS technique of ventral hernia repair using the Stryker Ideal-eyes articulating laparoscope and standard laparoscopic instruments in the day-case setting...
2016: International Journal of Surgery Case Reports
Yarah M Haidar, Olubunmi Ajose-Popoola, Hossein Mahboubi, Omid Moshtaghi, Yaser Ghavami, Harrison W Lin, Hamid R Djalilian
OBJECTIVE: To describe a novel approach for excision of exostoses and evaluate the outcomes of transcanal excision of exostoses using ultrasonic serrated knife-assistance versus microosteotomes only. STUDY DESIGN: Retrospective analysis. SETTING: Academic Tertiary Care Center. PATIENTS/INTERVENTIONS: Patients receiving a transcanal excision of exostoses between 2007 and 2016. MAIN OUTCOME MEASURES: The outcomes and postoperative complications of 138 patients who received transcanal microosteotome only technique were compared to 10 patients who received transcanal excision of exostoses using ultrasonic serrated knife-assistance (Stryker Corporation, Kalamazoo, MI)...
October 2016: Otology & Neurotology
Fa-Chuan Kuan, Ming-Long Yeh, Chih-Kai Hong, Florence L Chiang, I-Ming Jou, Ping-Hui Wang, Wei-Ren Su
BACKGROUND: Femoral neck fractures in young individuals are typically vertical shear fractures. These injuries are difficult to stabilize due to a significant varus displacement force across the hip with weight bearing. The purpose of this study was to evaluate the biomechanical stability offered by the addition of an augmented wire to conventional inverted triangle triple screw fixation for stabilizing vertical shear femoral neck fracture. METHODS: Sixteen medium 4th-generation synthetic composite femurs (Sawbones Pacific Research Laboratories, Vashon, WA) were divided into two groups...
October 2016: Injury
O-Wern Low, Andre E J Cheah
Carpal tunnel syndrome is a common complication associated with distal radius fractures. Open carpal tunnel release in the same setting as open reduction and internal fixation of distal radius fractures is widely accepted. In this paper, we describe the technical details of a minimally invasive carpal tunnel release in the same setting as the fixation of a distal radius fracture via the same incision. Two options of minimally invasive techniques are described: The Knifelight® (Stryker, Kalamazoo, Michigan, USA) instrument and the single portal carpal tunnel release system (Agee, 3M Healthcare, St Paul, Minnesota, USA)...
February 2016: J Hand Surg Asian Pac Vol
Phillip Larimer, Julien Spatazza, Juan Sebastian Espinosa, Yunshuo Tang, Megumi Kaneko, Andrea R Hasenstaub, Michael P Stryker, Arturo Alvarez-Buylla
The maturation of inhibitory GABAergic cortical circuits regulates experience-dependent plasticity. We recently showed that the heterochronic transplantation of parvalbumin (PV) or somatostatin (SST) interneurons from the medial ganglionic eminence (MGE) reactivates ocular dominance plasticity (ODP) in the postnatal mouse visual cortex. Might other types of interneurons similarly induce cortical plasticity? Here, we establish that caudal ganglionic eminence (CGE)-derived interneurons, when transplanted into the visual cortex of neonatal mice, migrate extensively in the host brain and acquire laminar distribution, marker expression, electrophysiological properties, and visual response properties like those of host CGE interneurons...
August 2, 2016: Cell Reports
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