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Dewei Zhao, Frank Witte, Faqiang Lu, Jiali Wang, Junlei Li, Ling Qin
As a new generation of medical metallic material, magnesium (Mg) and its alloys with or without surface coating have attracted a great deal of attention due to its biodegradability and potential for avoiding a removal operation after the implant has fulfilled its function for surgical fixation of injured musculoskeletal tissues. Although a few clinical cases on Mg-based orthopaedic implants were reported more than a century ago, it was not until recently that clinical trials using these implants with improved physicochemical properties were carried out in Germany, China and Korea for bone fracture fixation...
October 11, 2016: Biomaterials
Joan Manuel Burdeus González-Solís, Iván Díez-Santacoloma, Albert Isidro Llorens
Anterior tibial tubercle (ATT) osteotomy facilitates exposure in knee arthroplasty. However, it is not without complications. We have introduced some technical modifications that reduce the surgical aggression by designing a short osteotomy that does not invade the intramedullary canal, and synthesizing it with three cerclage wires with a particular layout that increases the solidity of the system. A retrospective review was performed on the surgical revision of total knee replacement cases intervened in our center that required an ATT osteotomy from February 2014 to February 2015, and who had a minimum clinical follow-up of 12 months...
October 21, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Ricarda Lechner, David Putzer, Michael Liebensteiner, Christian Bach, Martin Thaler
PURPOSE: Bone graft substitutes have been successfully used in posterolateral lumbar fusion, anterior cervical fusion and animal studies. This study has been conducted to assess the safety and efficacy of β-tricalcium phosphate (β-TCP) in instrumented anterior lumbar interbody fusion (ALIF) procedure. METHODS: In a prospective clinical study, ALIF cages were prefilled with β-TCP and additionally fixated with posterior pedicle screw. Computed tomography (CT) and X-rays were performed one year after surgery...
October 21, 2016: International Orthopaedics
K-J Maier, B Bücking, K Horst, H Andruszkow, F Hildebrand, M Knobe
BACKGROUND: In unstable trochanteric fractures, the extramedullary rotationally stable screw-anchor (RoSA) combines the benefits of the load and rotational stability of the blade with the advantages of the screw (pull-out resistance, compression capability) in a single load carrier, and was designed to prevent femoral neck shortening by using an additional locked trochanteric stabilizing plate (TSP). OBJECTIVES: The aim of the current prospective cohort study was the clinical evaluation of the RoSA/TSP system regarding the mechanical re-operation rate and the amount of postoperative femoral neck shortening...
October 21, 2016: Der Unfallchirurg
D Saul, J C Ammon, F August
We report the case of a 15-year-old boy with combined fractures of the scaphoid, capitate, and hamate that represents a rare variation of the well-known Fenton's syndrome. Fixation was performed for the unstable fractures of the scaphoid and capitate with the use of cannulated Herbert screws and K‑wires respectively. K‑wires were removed after 6 months, with subsequent physiotherapy. After 6 months, CT confirmed complete consolidation of the two surgically treated carpal fractures and the conservatively treated fracture of the hamate...
October 21, 2016: Der Unfallchirurg
Isaac Garrido-Benavent, Sergio Pérez-Ortega, Asunción de Los Ríos
Symbiotic associations between green algae (Chlorophyta) and fungi give rise to morphologically and eco-physiologically distinct entities, or so-called, lichens. In one of the most peculiar of these associations, the partners are species of the macroscopic genus Prasiola (Trebouxiophyceae) and the ascomycete Mastodia tessellata (Verrucariaceae). This is the only known case of a lichen symbiosis involving a foliose green alga. Despite intense research targeted at understanding the biology of this particular association, little is known about the genetic variability of its symbionts...
October 18, 2016: Molecular Phylogenetics and Evolution
Juho Suojanen, Junnu Leikola, Patricia Stoor
The use of virtual surgery, patient-specific saw and drill guides, and custom-made osteosynthesis plates is rapidly spreading from deformity surgery to orthognathic surgery. Most of the commercially available systems are using computer-aided design/computer-aided manufacture (CAD/CAM) wafers to produce patient-specific saw guides. However, most plate systems provided are still the conventional "in stock" mini plates that can be individually designed by pre-bending according to the stereolithographic model of the patient...
September 23, 2016: Journal of Cranio-maxillo-facial Surgery
Xiaodong Li, Maoqun Li, Jiang Li, Weihua Gong, Yuehua Sun, Jian Tang, Xiao Yao, Xiaoqing Wang
The aim of the present study was to investigate glove contamination and perforation rate during traumatic orthopedic surgeries and evaluate the factors affecting glove contamination and perforation. There were significant differences in glove contamination among different surgery stages. In terms of contamination and perforation, there were significant differences between surgeons and assistants (ie, scrub-nurses).
October 18, 2016: American Journal of Infection Control
Mira M Sachdeva, Frederick A Jakobiec, Anna M Stagner, Athanasios Papakostas, Dean Eliott
PURPOSE: Large relaxing retinectomies have become increasingly used in the repair of retinal detachment related to proliferative vitreoretinopathy (PVR). Retinectomies expose the retinal pigment epithelium (RPE) to the vitreous cavity; the direct effects of silicone oil on the RPE are only beginning to be understood. DESIGN: Retrospective case series. PARTICIPANTS: Twelve patients noted to develop pigmented epiretinal deposits at regularly scheduled follow-up visits after repair of complex retinal detachments using silicone oil tamponade and retinectomy...
October 18, 2016: Ophthalmology
Eli Kisilevsky, Luminita Tarita-Nistor, Esther G González, Mark S Mandelcorn, Michael H Brent, Samuel N Markowitz, Martin J Steinbach
OBJECTIVE: Patients with central vision loss develop preferred retinal loci (PRLs) in the eccentric retina. The characteristics of the PRLs for the better eye (BE) are well studied, but not those of the worse eye (WE). We examined the distribution of monocular PRLs in the visual field (VF), as well as visual acuity, fixation stability, and PRL eccentricity for the BE and WE of patients with central vision loss. DESIGN: Retrospective consecutive case series. PARTICIPANTS: A total of 87 BE and 50 WE of patients with central vision loss...
October 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
Devin Ganesh, Ben Service, Brian Zirgibel, Kenneth Koval
OBJECTIVES: To assess the utility of the dorsal tangential view (DTV) in detecting intraoperative dorsal screw penetration in distal radius fractures treated with volar locked plating. DESIGN: Retrospective cohort study. SETTING: Academic level 1 trauma center. PATIENTS/PARTICIPANTS: Skeletally mature patients where open reduction internal fixation with volar locked plating was the definitive treatment. A total of twenty-six patients were evaluated...
November 2016: Journal of Orthopaedic Trauma
Jennifer Kurowicki, Enesi Momoh, Jonathan C Levy
Periprosthetic humerus fractures are relatively uncommon occurrence that can be difficult to manage nonoperatively. Locking plate technology has enhanced the surgical management of these fractures. However, adequate fixation around the stem remains of some concern. We describe an osteosynthesis technique using a locking plate utilizing eccentrically placed screw holes to place "skive screws" in the proximal end of the plate to achieve fixation around the stem of the implant. A clinical series of 5 consecutive patients treated with this technique is presented with an average follow-up of 29 months (range, 12-48)...
November 2016: Journal of Orthopaedic Trauma
Norachart Sirisreetreerux, Babar Shafiq, Greg M Osgood, Erik A Hasenboehler
OBJECTIVES: To determine the location of distal medial neurovascular structures, identifying a medial "safe zone" for minimally invasive plate osteosynthesis to treat displaced femoral condylar fractures. METHODS: Eleven uninjured lower-half torsos were dissected on the bilateral medial lower thigh. A longitudinal incision was made at the midsagittal plane of the medial thigh starting 1 cm proximal to the knee joint and extending to the proximal one-third of the femur...
November 2016: Journal of Orthopaedic Trauma
Stephen Matthew Quinnan
Obtaining optimal results in the treatment of extraarticular distal tibia fractures can be challenging. Plate and screw and intramedullary fixation have proven to be effective treatments, but are associated with significant complication rates when used for open fractures and patient with severe medical comorbidities. External fixation is a third alternative that is less often employed, but provides a very effective means of treatment. Circular external fixation offers great flexibility in obtaining anatomic alignment and stable fixation for even the most challenging distal tibia fractures...
November 2016: Journal of Orthopaedic Trauma
Daniel Torino, Samir Mehta
The role of fibular fixation in patients with distal tibia fractures is controversial. Although the stability of the fibula is critical in patients with syndesmotic instability or highly comminuted pilon fractures, fibular fixation in extraarticular distal tibia fractures or elementary intraarticular distal tibia fractures is more controversial. Biomechanical studies, as performed in sawbones or cadaveric models, denote advantages to fibular fixation with respect to specific uniplanar motion. However, the increased stability is susceptible to the fracture pattern of the tibia, fixation strategy for the tibia, fixation strategy for the fibula, and loading pattern of the entire construct...
November 2016: Journal of Orthopaedic Trauma
Richard S Yoon, Frank A Liporace
Intramedullary nail and plate combination techniques have been described mostly for use in the proximal tibia. However, the nail and plate combination technique can also be used in the distal tibia, to counteract the deforming forces that cause construct failure and nonunion. In this article, we review pertinent anatomy and biomechanics and offer case examples that highlight the indications and applications of the nail and plate combination technique for distal tibia fractures.
November 2016: Journal of Orthopaedic Trauma
John A Scolaro, Francis H Broghammer, Derek J Donegan
The optimal treatment strategy for distal tibia fractures, especially those with intraarticular extension, remains controversial. Although open reduction and internal fixation with a plate and screw device is commonly performed for these injuries, the risk of soft tissue complications using this approach is significant. Staged treatment protocols and alternative means of fixation have been proposed to address these undesired events. Although potentially more technically demanding than fixation of diaphyseal or extraarticular tibial fractures, intramedullary nail (IMN) fixation of simple intraarticular distal tibia fractures is a viable treatment alternative with unique advantages...
November 2016: Journal of Orthopaedic Trauma
Michael Talerico, Jaimo Ahn
The objective of this article is to highlight the salient points of preoperative planning, intraoperative considerations for fracture reduction methods, and implant fixation when treating distal diaphyseal or diametaphyseal tibia fractures with an intramedullary nail. Through review of the necessary preoperative considerations, techniques available to hold and maintain a reduction, and lastly how to maximize the selected implant of intramedullary nail, we hope to assist the treating surgeon in simplifying these sometimes complex fractures into manageable injuries that can be treated successfully with an intramedullary implant...
November 2016: Journal of Orthopaedic Trauma
Heather A Vallier
Displaced distal tibia shaft fractures are effectively treated with standard plates and intramedullary nails. Plate fixation performed with meticulous soft tissue handling results in minimal risks of infection and poor wound healing. Standard plates have high rates of primary union, whereas locking plates may delay union because of increased stiffness. Tibial healing may also be delayed after plating of the fibula, although fibula reduction and fixation may aid accuracy of reduction of the tibia. Malalignment occurs more often with infrapatellar intramedullary nailing versus plates, and early results of suprapatellar nailing appear promising in minimizing intraoperative malalignment...
November 2016: Journal of Orthopaedic Trauma
Aaron Manzanares, Ruperto Menayo, Francisco Segado
In a sport conditioned by natural elements such as sailing, visual perception is a key factor for the performance. The research has shown that the visual behaviour of athletes at different skill levels varies, which may cause differences in the performance achieved. The aim of this research was to examine the visual behaviour of sailors from different ranking positions at the start of a race in a simulated situation. Twenty junior sailors (N=10 top and N=10 bottom ranking) participated in the study. The visual behaviour was recorded at the start of a sailing simulation...
October 21, 2016: Motor Control
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