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Vikash Kapoor, Daipayan Chatterjee, Sutanu Hazra, Anirban Chatterjee, Parag Garg, Kaustav Debnath, Soham Mandal, Sudipto Sarkar
INTRODUCTION: Patient satisfaction after total knee replacement (TKR) depends on the amount of pain relief and the functional activities achieved. An important criterion of good functional outcome is the amount of flexion achieved and whether the patient can manage high flexion activities. In order to increase the amount of safe flexion, various implant designs have been developed. This study aims to compare the outcome after TKR using two contemporary high flexion knee designs: Sigma CR150 High Flex Knee prosthesis (Depuy, Warsaw, Indiana) and NexGen High Flex Knee prosthesis (Zimmer, Warsaw, Indiana)...
2016: SICOT-J
Mario G Zotti, Oscar P Brumby-Rendell, Ben McDonald, Tom Fisher, Christovalantis Tsimiklis, Wai Weng Yoon, Orso L Osti
BACKGROUND: Our aim was to determine whether patients derived benefit from removal of pedicle screw instrumentation for axial pain without other cause using our surgical technique and patient selection. A secondary aim was to investigate factors that were associated with poorer outcomes for this procedure as well as complication rate in this cohort. METHODS: Theater records from a single spinal surgeon's practice were reviewed to identify patients that had undergone lumbar fusion for discogenic back pain with subsequent pedicle screw instrumentation removal (Expedium, DePuy Synthes) in the preceding 3 years with a minimum of 18 months follow-up...
December 2015: J Spine Surg
Rasmus Juul, Jesper Fabrin, Klaus Poulsen, Henrik Morville Schroder
PURPOSE: To report our experience with two-stage revision using a new femoral component (NFC) spacer (Depuy Synthes) as an articulating spacer. MATERIALS AND METHODS: In this retrospective study, we reviewed 22 two-stage revisions that were performed using an NFC spacer in 22 patients suspected of having an infected total knee arthroplasty (TKA) from December 2010 to March 2013. The result was considered successful when eradication of infection was achieved using only one NFC spacer...
September 2016: Knee Surgery & related Research
Jun-Bae Kim, Suk-Joo Lyu, Hyung Wook Kang
BACKGROUND: The purpose of this study was to determine the shape of the distal femur of Korean women compared with the prostheses currently available in Korea. METHODS: Morphometric data (5 parameters) were measured in 356 resected femurs of Korean women undergoing primary total knee arthroplasty (TKA) utilizing the LCS knee implant (DePuy). The data were then compared with 5 additional contemporary TKA implant systems. RESULTS: Implant designs based on Caucasian population data do not ideally match the distal femoral morphology of Korean women...
September 2016: Clinics in Orthopedic Surgery
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
Dianne Bryant, Richard Holtby, Kevin Willits, Robert Litchfield, Darren Drosdowech, Alison Spouge, David White, Gordon Guyatt
BACKGROUND: The rate of rotator cuff repair failure is between 13% and 67%. Porcine small intestine submucosa (SIS) may be suitable to augment the repair. METHODS: There were 62 patients with moderate and large cuff tears randomized to repair alone (control) or augmentation with SIS (Restore Orthobiologic Implant; DePuy, Warsaw, IN, USA). Primary outcome was repair failure using magnetic resonance arthrography. Randomization occurred on completion of the repair...
October 2016: Journal of Shoulder and Elbow Surgery
John C Smulian, Ana-Liza Pascual, Helai Hesham, Emma Qureshey, M Bijoy Thomas, Amy M Depuy, Amanda B Flicker, William E Scorza
PURPOSE: To determine the impact of a structured multi-disciplinary management strategy on clinical outcomes in women with invasive placental disease (IPD). MATERIALS AND METHODS: This was a retrospective cohort study of consecutive women having peripartum hysterectomies with IPD over seven years. For the most recent three years, a structured multidisciplinary team (MDT) reviewed each suspected case, created a management plan, and implemented that plan. Outcomes were compared between cases delivered prior to and after the MDT process was started...
August 18, 2016: Journal of Maternal-fetal & Neonatal Medicine
Harry S Hothi, Antti P Eskelinen, Reshid Berber, Olli S Lainiala, Teemu P S Moilanen, John A Skinner, Alister J Hart
BACKGROUND: Trunnionosis of the tapered head-stem junction of total hip arthroplasties, either through corrosion or mechanical wear, has been implicated in early implant failure. Retrieval analysis of large numbers of failed implants can help us better understand the factors that influence damage at this interface. METHODS: In this study, we examined 120 retrieved total hip arthroplasties of one bearing design, the 36-mm diameter metal-on-metal, DePuy Pinnacle, that had been paired with 3 different stems...
June 29, 2016: Journal of Arthroplasty
Kenneth K Hansraj
INTRODUCTION: Spine surgeons are embracing advanced biologic technologies in an attempt to help millions of people achieve a better outcome in spine surgery. These new technologies may be complicated to understand, partly because the contribution of different types of cells has not been definitively identified. This paper describes the characteristics of the stem cells used in spine surgery, including their actions and possible complications. The description necessitates an overview of all studies to date on the use of stem cells in spine surgery, as well as other cells used in cellular therapy...
July 29, 2016: Surgical Technology International
Raelene M Cowie, Silvia Carbone, Sean Aiken, John J Cooper, Louise M Jennings
Calcium sulfate bone void fillers are increasingly being used for dead space management in infected arthroplasty revision surgery. The presence of these materials as loose beads close to the bearing surfaces of joint replacements gives the potential for them to enter the joint becoming trapped between the articulating surfaces; the resulting damage to cobalt chrome counterfaces and the subsequent wear of ultra-high-molecular-weight polyethylene is unknown. In this study, third-body damage to cobalt chrome counterfaces was simulated using particles of the calcium sulfate bone void fillers Stimulan(®) (Biocomposites Ltd...
August 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Phillip Penny, Michael Swords, Jason Heisler, Adam Cien, Andrew Sands, Peter Cole
OBJECTIVES: The purpose of this study was to examine the screw trajectory of ten commercially available distal tibia plates and compare them to common fracture patterns seen in OTA C type pilon fractures to determine their ability to stabilize the three most common fracture fragments while buttressing anterolateral zones of comminution. HYPOTHESIS: We hypothesized that a single plate for the distal tibia would fail to adequately stabilize all three main fracture fragments and zones of comminution in complex pilon fractures...
August 2016: Injury
Jong Yeal Kang, Yong Seuk Lee
The authors report a case of failure fracture of the tibial metal tray and polyethylene insert at the same level in a 73-year-old woman 10 years after total knee arthroplasty using the AMK Total Knee System (DePuy, Warsaw, Indiana). Causes of this fracture are analyzed and discussed, with the focus on the importance of component design, position, and size. The overall aim of this case report is for orthopedic surgeons to avoid this complication in total knee arthroplasty by paying attention to these controllable factors...
July 1, 2016: Orthopedics
S Popelka, A Sosna, P Vavřík, D Jahoda, V Barták, I Landor
UNLABELLED: PURPOSE OF THE STUDY Total joint replacement is one of the options in surgical treatment of advanced ankle arthritis. It allows the ankle to remain mobile but, unfortunately, it does not provide the same longevity as total knee or hip replacements. Therefore, decisions concerning the kind of treatment are very individual and depend on the clinical status and opinion of each patient. MATERIAL AND METHODS A total of 132 total ankle replacements were carried out in the period from 2004 to 2015...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
John B Medley
One of the most important mandates of physical joint simulators is to provide test results that allow the implant manufacturer to anticipate and perhaps avoid clinical wear problems with their new products. This is best done before market release. This study gives four steps to follow in conducting such wear simulator testing. Two major examples involving hip wear simulators are discussed in which attempts had been made to predict clinical wear performance prior to market release. The second one, involving the DePuy ASR implant systems, is chosen for more extensive treatment by making it an illustrative example to explore whether wear simulator testing can anticipate clinical wear problems...
May 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Judith E Kopinski, Ajay Aggarwal, Ryan M Nunley, Robert L Barrack, Denis Nam
BACKGROUND: Recent literature has shown debonding of the tibial implant-cement interface as a potential cause for implant loosening. The purpose of this case series is to report this phenomenon in a historically well-performing implant when used with high-viscosity cement (HVC). METHODS: Thirteen primary cemented Biomet Vanguard total knee arthroplasties were referred to 1 of 2 institutions with complaints of persistent pain after their index procedure. A radiographic and infectious work-up was completed for each patient...
April 12, 2016: Journal of Arthroplasty
David John Langton, Raghavendra Prasad Sidaginamale, Peter Avery, Sue Waller, Ghanshyabhai Tank, James Lord, Thomas Joyce, Nick Cooke, Raj Logishetty, Antoni Viraf Francis Nargol
OBJECTIVES: To determine risk factors for revision in patients implanted with a commonly used metal on metal (MoM) hip replacement. DESIGN: Retrospective cohort study in combination with a prospective national retrieval study (Northern Retrieval Registry (NRR)). SETTING: Combined orthopaedic unit in combination with the NRR. PARTICIPANTS: All patients implanted with a DePuy Pinnacle MoM hip prostheses by the 2 senior authors were invited to attend for a review which included clinical examination, blood metal ion measurements, radiographs and targeted imaging...
2016: BMJ Open
Gabrielle S Donahue, Viktor Lindgren, Vincent P Galea, Rami Madanat, Orhun Muratoglu, Henrik Malchau
BACKGROUND: Female patients undergoing hip resurfacing arthroplasties may be at greater risk of revision surgery than males, but it is unclear whether this is related to sex or other factors. We focused our analysis on data from a prospective multicenter cohort study monitoring the ASR(TM) hip resurfacing arthroplasty prosthesis on the potential association of sex on patient-reported outcome measures (PROMs), metal ion levels, revision surgery, and presence of adverse local tissue reaction...
October 2016: Clinical Orthopaedics and related Research
Dirk Wähnert, Niklas Grüneweller, Dominic Gehweiler, Benjamin Brunn, Michael J Raschke, Richard Stange
Periprosthetic hip fractures are an increasing problem in modern orthopedic and trauma surgery. Many options for the operative treatment are available to the surgeon ranging from modern variable angular systems to standard plates, screws and cerclages. However, there is no gold standard and therefore, the aim of this study was to investigate the biomechanical characteristics of double plating versus a lateral standard plate in a Vancouver B1 fracture model. Ten 4th generation composite femora were used to implant cementless total hip prosthesis and create Vancouver B1 periprosthetic fractures...
April 7, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Robert F Heary, Naresh K Parvathreddy, Zainab S Qayumi, Naiim S Ali, Nitin Agarwal
OBJECTIVE Fibular allograft remains a widely used strut for corpectomy surgeries. The amount of graft material that can be packed into an allograft strut has not been quantified. Cages are an alternative to fibular allograft for fusion surgeries. The authors of this study assessed the suitability of carbon fiber-reinforced polyetheretherketone (CFRP) cages for anterior corpectomy surgeries. They further explored the parameters known to affect fusion rates in clinical practice. METHODS Six fibular allografts were tested at standard lengths...
August 2016: Journal of Neurosurgery. Spine
Mo Saffarini, Guillaume Demey, Luca Nover, David Dejour
BACKGROUND: The study aimed to compare trochlear profiles in recent total knee arthroplasty (TKA) models and to determine whether they feature improvements compared to their predecessors. The hypothesis was that recent TKA models have more anatomic trochlear compartments and would display no signs of trochlear dysplasia. METHODS: The authors analyzed the geometry of the 6 following TKA models using engineering software: PFC and Attune (DePuy), NexGen and Persona (Zimmer), Noetos and KneeTec (Tornier)...
January 2016: Annals of Translational Medicine
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