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Scaphoid imaging

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https://www.readbyqxmd.com/read/29347832/wire-placement-in-the-sustentaculum-tali-using-a-2d-projection-based-software-application-for-mobile-c-arms-cadaveric-study
#1
Benedict Swartman, Dirk Frere, Wei Wei, Marc Schnetzke, Stephan Grechenig, Amir Matityahu, Nils Beisemann, Holger Keil, Jochen Franke, Paul Alfred Grützner, Sven Yves Vetter
BACKGROUND: Indirect screw fixation of the sustentaculum tali in the lateral-medial direction can be challenging due to the complex calcaneal anatomy. A novel 2-dimensional (2D) projection-based software application detects Kirschner wires (K-wires) and visualizes their intended direction as a colored trajectory. The aim of this prospectively randomized cadaver study was to investigate whether the software would facilitate the indirect K-wire placement in the sustentaculum tali. METHODS: In 20 cadaver foot specimens, K-wires were placed indirectly in the sustentaculum tali by an experienced and an inexperienced surgeon, with and without using the application...
January 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29310416/medium-term-outcome-of-closed-radial-wedge-osteotomy-of-the-distal-radius-for-preiser-disease-with-concomitant-kienb%C3%A3-ck-disease-two-case-reports-and-a-literature-review
#2
Yuji Tomori, Takuya Sawaizumi, Nanno Mitsuhiko, Shinro Takai
RATIONALE: Idiopathic avascular necrosis of the scaphoid or lunate bone are known as Preiser disease and Kienböck disease, respectively. Although there are reports of avascular necrosis involving more than one carpal bone, concurrent idiopathic avascular necrosis of the scaphoid and lunate bones is rare, with only five cases reported in the English literature (including the two herein). Although the optimum treatment for Preiser disease with concomitant Kienböck disease has not been established, our cases underwent closed radial wedge osteotomy based on the evidence of satisfactory outcomes for treating Kienböck disease...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29305609/does-wrist-laxity-influence-3d-carpal-bone-motion
#3
Gordie Best, Michelle Zec, David Pichora, Robin Kamal, Michael J Rainbow
Previous 2D studies have shown that there is a spectrum of carpal mechanics that varies between row-type motion and column-type motion as a function of wrist laxity. More recent 3D studies have suggested instead that carpal bone motion is consistent across individuals. The purpose of this study was to use 3D methods to determine whether carpal kinematics differ between stiffer wrists and wrists with higher laxity. Wrist laxity was quantified using a goniometer in 10 subjects by measuring passive wrist flexion-extension range of motion...
January 5, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29282524/perilunate-fracture-dislocations-clinical-and-radiological-results-of-21-cases
#4
Thomas Meszaros, Esther Vögelin, Lukas Mathys, Franck Marie Leclère
BACKGROUND: Perilunate dislocations and fracture-dislocations are a subcategory of the carpal instability complex. Herein, we report our university hospital experience with this complex injury. The goal of our study was to find predictive factors and quantify the development of arthritis and lunate necrosis. We tried to measure the impact of arthritis on hand function. METHODS: Between January 2000 and December 2014, 21 patients underwent surgery for perilunate dislocations and perilunate fracture-dislocations of the wrist in our tertiary university center...
December 27, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29258960/corticocancellous-bone-graft-vs-cancellous-bone-graft-for-the-management-of-unstable-scaphoid-nonunion
#5
J K Kim, J O Yoon, H Baek
INTRODUCTION: This study was undertaken to determine whether corticocancellous bone grafting and cancellous bone grafting differ in terms of bone union rate, restoration of scaphoid anatomy, and wrist function when unstable scaphoid nonunions are concomitantly treated by screw fixation. MATERIALS AND METHODS: This is retrospective cohort study. In Group A (17 patients), unstable scaphoid nonunion was treated with corticocancellous graft harvested from the iliac crest and headless compression screw using volar approach...
December 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29172878/the-economic-evidence-for-advanced-imaging-in-the-diagnosis-of-suspected-scaphoid-fractures-systematic-review-of-evidence
#6
Tiago Rua, David Parkin, Vicky Goh, Paul McCrone, Sam Gidwani
Given the limitations of conventional radiography in the diagnosis of suspected scaphoid fractures on presentation, advanced imaging, particularly magnetic resonance imaging, is a useful additional investigation. We carried out a systematic review of the economic evidence for the use of advanced imaging in the management of suspected scaphoid fractures. Fifteen articles were included in the review. Owing to the heterogeneity of study designs, the type and timing of interventions and the economic analyses performed, direct comparisons between the 15 studies were difficult...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29169719/fracture-gap-reduction-with-variable-pitch-headless-screws
#7
Austin J Roebke, Logan J Roebke, Kanu S Goyal
PURPOSE: Fully threaded, variable-pitch, headless screws are used in many settings in surgery and have been extensively studied in this context, especially in regard to scaphoid fractures. However, it is not well understood how screw parameters such as diameter, length, and pitch variation, as well as technique parameters such as depth of drilling, affect gap closure. METHODS: Acutrak 2 fully threaded variable-pitch headless screws of various diameters (Standard, Mini, and Micro) and lengths (16-28 mm) were inserted into polyurethane blocks of "normal" and "osteoporotic" bone model densities using a custom jig...
November 21, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29165014/fixation-of-proximal-pole-scaphoid-nonunion-with-non-vascularized-cancellous-autograft
#8
Timothy J Luchetti, Allison J Rao, John J Fernandez, Mark S Cohen, Robert W Wysocki
We present 20 patients with established proximal pole scaphoid nonunions treated with curettage and cancellous autograft from the distal radius and screw fixation. Fractures with significant proximal pole fragmentation were excluded. Patients were treated at a mean of 26 weeks after injury (range 12-72). Union occurred in 18 of 20 patients (90%) based on computed tomographic imaging. The two nonunions that did not heal were treated with repeat curettage and debridement and iliac crest bone grafting without revision of fixation...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29153368/diagnostic-value-of-cone-beam-computed-tomography-cbct-in-occult-scaphoid-and-wrist-fractures
#9
Christophe Borel, Ahmed Larbi, Stephanie Delclaux, Franck Lapegue, Helene Chiavassa-Gandois, Nicolas Sans, Marie Faruch-Bilfeld
OBJECTIVE: Evaluate the diagnostic value of cone beam computed tomography (CBCT) for scaphoid and wrist fractures that are missed on standard radiographs. MATERIALS AND METHODS: Between September 2014 and October 2015, we prospectively enrolled 49 patients with a clinically suspected scaphoid fracture following an acute injury but had normal radiographs. Each patients underwent radiographs, CBCT and (magnetic resonance imaging) MRI within 7days of the initial injury event...
December 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/29143872/concomitant-hook-of-hamate-fractures-in-patients-with-scaphoid-fracture-more-common-than-you-might-think
#10
Ramin Mandegaran, Sam Gidwani, Ali Zavareh
OBJECTIVE: The scaphoid is the most commonly fractured carpal bone. The presence of a concomitant hook of hamate fracture is of particular relevance given that it is often occult on routine wrist/scaphoid radiographs and that hook of hamate fractures are prone to symptomatic non-union, resulting in chronic ulnar wrist pain. Prompt diagnosis and immobilisation/fixation may minimise such complications. Our study is aimed at assessing the frequency of concomitant hook of hamate fractures in patients with scaphoid fractures...
November 16, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29132239/lunate-fractures-and-associated-radiocarpal-and-midcarpal-instabilities-a-systematic-review
#11
Meenalochani Shunmugam, Joideep Phadnis, Amy Watts, Gregory I Bain
The aim of this study was to analyse lunate fractures and any associated osseo-ligamentous injuries. A systematic review identified 34 cases. We identified carpal instabilities at the radiocarpal and midcarpal joints in volar and dorsal directions. Radiocarpal instabilities (10/34) were usually dorsoradial (8/10), with a transverse lunate fracture, best seen on a coronal image. Midcarpal instabilities (24/34) were usually volar (14/18), with a volar lunate shear fracture, best seen on a sagittal image. Instabilities were sub-classified into non-displaced, subluxated and dislocated...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29116329/digital-tomography-for-detection-of-acute-occult-scaphoid-fractures
#12
Anthony M Barcia, Liang Zhou, Jay B Cook, Kenneth K Lindell, Rey D Gumboc, Aaron D Dykstra, Robert J Lachky, Steven H Shaha, Kenneth F Taylor
Diagnosis of occult scaphoid fractures remains a challenge. Traditional management consisting of 2 weeks of immobilization and repeat radiographs results in unnecessary immobilization of many patients without fracture. Magnetic resonance imaging (MRI) is sensitive but expensive. Digital tomography (DT) is an imaging technique that provides fine-cut visualization with minimal radiation exposure and may be used when there is high clinical suspicion despite negative findings on initial radiographs. The authors compared the ability of DT vs MRI to detect acute occult scaphoid fractures...
November 1, 2017: Orthopedics
https://www.readbyqxmd.com/read/29105589/the-morphology-of-proximal-pole-scaphoid-fractures-implications-for-optimal-screw-placement
#13
Timothy J Luchetti, Youssef Hedroug, John J Fernandez, Mark S Cohen, Robert W Wysocki
The purpose of this study was to measure the radiographic parameters of proximal pole scaphoid fractures, and calculate the ideal starting points and trajectories for antegrade screw insertion. Computed tomography scans of 19 consecutive patients with proximal pole fractures were studied using open source digital imaging and communications in medicine (DICOM) imaging measurement software. For scaphoid sagittal measurements, fracture inclination was measured with respect to the scaphoid axis. The ideal starting point for a screw in the proximal pole fragment was then identified on the scaphoid sagittal image that demonstrated the largest dimensions of the proximal pole, and hence the greatest screw thread purchase...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29105586/radial-styloidectomy-for-scaphoid-nonunion-advanced-collapse-relevance-of-nonunion-location
#14
Emil S Vutescu, Rishabh Jethanandani, Darryl B Sneag, Scott W Wolfe, Steve K Lee
Radial styloidectomy along with scaphoid nonunion reconstructive surgery is considered an acceptable surgical treatment for stage 1 scaphoid nonunion advanced collapse. The extent of radioscaphoid joint wear that defines scaphoid nonunion advanced collapse stage 1 is unclear. An appropriate radial styloidectomy is limited to 6 mm styloid removal to prevent carpal instability. The aim of this study was to determine whether nonunion fracture location can be a guiding factor in determining whether the scaphoid bone can be retained with scaphoid nonunion reconstructive surgery and radial styloidectomy...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29102567/clinical-and-radiologic-outcomes-after-scaphoid-fracture-injury-and-treatment-patterns-in-national-football-league-combine-athletes-between-2009-and-2014
#15
Gilbert Moatshe, Jonathan A Godin, Jorge Chahla, Mark E Cinque, Nicholas I Kennedy, George Sanchez, Brendin R Beaulieu-Jones, Robert F LaPrade, Matthew T Provencher
PURPOSE: To report on the clinical and radiologic outcomes and complications after surgical treatment in National Football League (NFL) Combine athletes with a history of a scaphoid fracture. METHODS: The medical records of 2,285 athletes participating in the NFL Combine from 2009 to 2015 were evaluated for a history of scaphoid, hand, or wrist injury. Clinical outcomes, including grip strength, pinch test, range of motion, and presence of pain and stiffness, were recorded...
November 1, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29098903/scaphoid-instability-caused-by-a-giant-cell-tumour-of-the-tendon-sheath-a-case-report
#16
Yanjun Wang, Xiaoxiao Zhu, Genwang Pei, Xianshang Zeng, Deng Chen, Yonggang Zuo, Weiguang Yu, Zhe Ge, Xinchao Zhang
Giant-cell tumour of the tendon sheath (GCTTS) is a soft tissue tumour that may invade bone, causing an intrinsic osseous lesion or instability on radiographs. A case with scaphoid instability caused by a histologically-confirmed neighbouring GCTTS has rarely been described in the literature. No definite and radical method is available for the treatment of GCTTS. This report describes an unusual case of a 22-year-old woman who previously experienced a GCTTS in her right elbow, which was removed 10 years earlier...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/29053096/-scaphoid-fracture-in-a-seven-year-old-girl
#17
Ahmed Halloum, Morten Kjerri Rasmussen, Rikke Thorninger
We report a case of a seven-year-old girl, who had a scaphoid fracture, which occurred when she fell off her bicycle. She was examined in the emergency room. X-ray did not show any sign of fracture of the scaphoid, but the fracture was later verified with a magnetic resonance imaging scan. She wore a shin cast for eight weeks and recovered completely. Very few cases of children aged under eight years and diagnosed with scaphoid fracture have been reported in the literature. Scaphoid fracture should be suspected and examined for in all children with relevant trauma and symptoms, regardless of age...
October 16, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28945157/success-of-scaphoid-nonunion-surgery-is-independent-of-proximal-pole-vascularity
#18
Schneider K Rancy, Morgan M Swanstrom, Edward F DiCarlo, Darryl B Sneag, Steve K Lee, Scott W Wolfe
We followed 35 consecutive patients with scaphoid nonunions in a prospective longitudinal registry. All nonunions were treated with curettage, non-vascularized autogenous grafting and headless screw fixation. Preoperative magnetic resonance imaging, intraoperative bleeding points and histopathological analysis of cancellous bone in the proximal pole were recorded as measures of viability. Healing was categorized as ≥50% bony bridging on computed tomographic images in the plane of the scaphoid. Nine of 23 proximal poles demonstrated ischaemia on magnetic resonance imaging but none were interpreted as infarcted...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28755282/scaphoid-fracture-bone-marrow-edema-detected-with-dual-energy-ct-virtual-non-calcium-images-and-confirmed-with-mri
#19
Nazeer M Dareez, Kristine H Dahlslett, Eirin Engesland, Elisabeth S Lindland
We aimed to determine whether bone marrow edema (BME) in acute traumatic scaphoid fracture could be demonstrated with dual-energy CT (DECT) using MRI as the gold standard. In recent years, virtual non-calcium (VNCa) images have been used to demonstrate BME in trauma cases, for example, in vertebral compression fractures, hip trauma to detect occult fractures and knee fractures. We present three cases of acute scaphoid trauma. Two patients had subtle or invisible fractures on x-ray and conventional CT images, while DECT VNCa images clearly visualized the BME, which was confirmed by MRI...
December 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28746289/management-of-scaphoid-fractures
#20
Jason H Ko, Mitchell A Pet, Joseph S Khouri, Warren C Hammert
LEARNING OBJECTIVES: After reading this article, the participant should be able to: 1. Understand the epidemiology, classification, and anatomy pertinent to the scaphoid. 2. Appropriately evaluate a patient with suspected scaphoid fracture, including appropriate imaging. 3. Understand the indications for operative treatment of scaphoid fractures, and be familiar with the various surgical approaches. 4. Describe the treatment options for scaphoid nonunion and avascular necrosis of the proximal pole...
August 2017: Plastic and Reconstructive Surgery
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