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Scaphoid imaging

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https://www.readbyqxmd.com/read/27920391/dorsal-intercalated-segmental-instability-associated-with-malunion-of-a-reconstructed-scaphoid
#1
J-H Kim, K-H Lee, B G Lee, C-H Lee, S-J Kim, W-S Choi
: We analysed scaphoid deformity as a result of surgical treatment of scaphoid fracture nonunion and assessed the deformity associated with a dorsal intercalated segmental instability pattern of carpal malalignment. A total of 45 patients who were treated for scaphoid fracture nonunion were included in the study. The height-to-length ratio of the scaphoid was measured on computed tomographic images and used to assess scaphoid deformity. Carpal malalignment was quantified based on the radio-lunate angle...
December 5, 2016: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/27890247/reproducibility-of-x-rays-and-ct-arthrography-in-slac-snac-scac-wrists
#2
R Belhaouane, N Lebeau, C Maes-Clavier, C Hustin, E Krief, B Bonnaire, M Warin, V Rotari, E David
The purpose of this study was to assess the inter-observer and intra-observer reproducibility of the interpretation of CT arthrography and plain X-rays for scapholunate advanced collapse (SLAC), scaphoid non-union advanced collapse (SNAC) and scaphoid chondrocalcinosis advanced collapse (SCAC) wrist conditions, as well as the clinical relevance of these imaging modalities. The CT and X-rays images were reviewed twice in a blinded and randomized manner by two experienced orthopedic surgeons specialized in hand surgery, two orthopedic surgery residents and two experienced radiologists specialized in bone and joint imaging...
December 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27847847/inter-observer-agreement-between-2-dimensional-ct-versus-3-dimensional-i-space-model-in-the-diagnosis-of-occult-scaphoid-fractures
#3
Tessa Drijkoningen, Robert Knoter, Emile G Coerkamp, Anton H J Koning, Steven J Rhemrev, Frank J Beeres
BACKGROUND: The I-Space is a radiological imaging system in which Computed Tomography (CT)-scans can be evaluated as a three dimensional hologram. The aim of this study is to analyze the value of virtual reality (I-Space) in diagnosing acute occult scaphoid fractures. METHODS: A convenient cohort of 24 patients with a CT-scan from prior studies, without a scaphoid fracture on radiograph, yet high clinical suspicion of a fracture, were included in this study. CT-scans were evaluated in the I-Space by 7 observers of which 3 observers assessed the scans in the I-Space twice...
October 2016: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/27777822/the-role-of-dynamic-4d-ct-in-the-detection-of-scapholunate-ligament-injury
#4
Sanjeev Kakar, Ryan E Breighner, Shuai Leng, Cynthia H McCollough, Steven L Moran, Richard A Berger, Kristin D Zhao
Background Scapholunate (SL) interosseus ligament injuries detected at an early stage could allow the surgeon to prevent progression through the spectrum of injury that leads to instability, and eventually osteoarthritis. We contend that early instability following injury can be detected by visualizing the relative motions and distances between the involved carpal bones (scaphoid and lunate) during wrist movement in vivo. The purpose of this study is to demonstrate the utility of dynamic CT (i.e., 4DCT) in diagnosing SL interosseus ligament injuries in two patients with clinical suspicion of SL interosseus ligament injury during flexion-extension (FE), radial-ulnar (RU) deviation, and dart thrower's (DT) motions...
November 2016: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/27725994/-acute-scaphoid-fractures-management-under-consideration-of-the-new-s3-level-guideline
#5
M Schädel-Höpfner, B Bickert, C Dumont, P Laier, R Meier, A Nusche, T Pillukat, H Rosenthal, R Schmitt, F Siemers, A Zach, M Jung
BACKGROUND: Scaphoid fractures represent the most common carpal fractures and are often problematic and frequently lead to nonunion with osteoarthritis and collapse of the wrist. The reasons for the nonunion are manifold. Therefore, the main goal of diagnosis and therapy of acute fractures is to achieve bony union and to restore the anatomic shape of the scaphoid. In the long run, only this can preserve the normal function of the wrist. METHODOLOGY: The given recommendations are based on the new S3-level guideline of the AWMF (Association of the Scientific Medical Societies)...
October 10, 2016: Der Orthopäde
https://www.readbyqxmd.com/read/27671798/comparing-radial-styloid-size-between-osteoarthritic-and-healthy-wrists-a-pathoanatomical-three-dimensional-study
#6
P W L Ten Berg, J G G Dobbe, M E Brinkhorst, S D Strackee, G J Streekstra
: Radial styloid pointing due to spur formation is considered an early sign of osteoarthritis, but is sometimes difficult to distinguish from normal anatomic variation. In this pathoanatomical study we used three-dimensional imaging techniques to evaluate quantitatively whether the styloid size is larger in wrists with scaphoid non-union than in healthy wrists. We compared these findings with duration of the non-union and with the scaphoid non-union advanced collapse classification, which was based on radiographic assessment of the general level of wrist osteoarthritis...
September 26, 2016: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/27661002/evaluating-radiocarpal-cartilage-matrix-changes-3-months-after-anti-tnf-treatment-for-rheumatoid-arthritis-using-mr-t1%C3%AF-imaging
#7
Eric Ku, Valentina Pedoia, Matthew Tanaka, Ursula Heilmeier, John Imboden, Jonathan Graf, Thomas Link, Xiaojuan Li
PURPOSE: To evaluate the feasibility of MR T1ρ in assessing radiocarpal cartilage matrix changes following rheumatoid arthritis (RA) treatment. MATERIALS AND METHODS: Five healthy controls and nine RA patients were studied: three RA patients with low disease activity that were treated with methotrexate (MTX) alone and six with active disease despite MTX treatment who were additionally treated with certolizumab pegol, an anti-tumor necrosis factor biologic. Wrist 3 Tesla MRI were acquired at baseline and 3-month follow-up...
September 23, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27648575/comparison-of-median-nerve-cross-sectional-area-on-3-t-mri-in-patients-with-carpal-tunnel-syndrome
#8
Mikinori Ikeda, Mitsuhiro Okada, Masahiko Toyama, Takuya Uemura, Kiyohito Takamatsu, Hiroaki Nakamura
This study correlated morphologic abnormalities of idiopathic carpal tunnel syndrome (CTS) with the severity of CTS using 3-T magnetic resonance imaging (MRI). The relationship of the severity of CTS and the cross-sectional area of the median nerve (CSA) was assessed at several levels. Seventy wrists of 35 patients (27 women and 8 men) with unilateral idiopathic CTS underwent nerve conduction study and 3-T MRI of the wrist. The CSA at 4 levels (distal radioulnar joint, body of scaphoid, tubercule of scaphoid, and hook of hamate) and the thickness of the transverse carpal ligament at 3 levels in both affected and unaffected hands were measured using 3-T MRI and correlated with the severity of CTS assessed with distal motor latency...
September 19, 2016: Orthopedics
https://www.readbyqxmd.com/read/27606961/in-vivo-kinematics-of-the-thumb-during-flexion-and-adduction-motion-evidence-for-a-screw-home-mechanism
#9
Priscilla D'agostino, Benjamin Dourthe, Faes Kerkhof, Filip Stockmans, Evie E Vereecke
The thumb plays a crucial role in basic hand function. However, the kinematics of its entire articular chain have not yet been quantified. Such investigation is essential to improve our understanding of thumb function and to develop better strategies to treat thumb joint pathologies. The primary objective of this study is to quantify the in vivo kinematics of the trapeziometacarpal (TMC) and scaphotrapezial (ST) joints during flexion and adduction of the thumb. In addition, we want to evaluate the potential coupling between the TMC and ST joints during these tasks...
September 8, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27589915/three-dimensional-analysis-of-osteophyte-formation-on-distal-radius-following-scaphoid-nonunion
#10
Keiichiro Oura, Hisao Moritomo, Toshiyuki Kataoka, Kunihiro Oka, Tsuyoshi Murase, Kazuomi Sugamoto, Hideki Yoshikawa
BACKGROUND: The purposes of this study were to quantitatively analyze osteophyte formation of the distal radius following scaphoid nonunion and to investigate how fracture locations relate to osteophyte formation patterns. METHODS: Three-dimensional surface models of the scaphoid and distal radius were constructed from computed tomographic images of both the wrists of 17 patients' with scaphoid nonunion. The scaphoid nonunions were classified into 3 types according to the location of the fracture line: distal extra-articular (n = 6); distal intra-articular (n = 5); and proximal (n = 6)...
August 30, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27570228/changes-in-wrist-motion-after-simulated-scapholunate-arthrodesis-a-cadaveric-study
#11
Kevin D Han, Jaehon M Kim, Michael V DeFazio, Ricardo J Bello, Ryan D Katz, Brent G Parks, Kenneth R Means
PURPOSE: A high incidence of nonunion and relatively poor outcomes with prior fixation techniques has precluded scapholunate (SL) arthrodesis as a standard treatment for SL instability. Our purpose was to determine the impact on range of motion (ROM) of simulated SL arthrodesis via headless screw fixation. METHODS: We performed baseline wrist ROM for 10 cadaveric wrists using a standardized mounting-and-weights system. Extension, flexion, radial deviation, ulnar deviation, dart-thrower's extension, and dart-thrower's flexion were assessed...
September 2016: Journal of Hand Surgery
https://www.readbyqxmd.com/read/27529045/the-role-of-dynamic-contrast-enhanced-mri-in-a-child-with-sport-induced-avascular-necrosis-of-the-scaphoid-a-case-report-and-literature-review
#12
Baris Beytullah Koc, Martijn Schotanus, Bob Jong, Pieter Tilman
Avascular necrosis (AVN) of the scaphoid in children is very rare and there is currently no consensus when conservative or operative treatment is indicated. A 10-year-old boy, practicing karate, presented with acute pain in his left wrist after falling on the outstretched hand. Imaging showed a scaphoid waist fracture with signs of an ongoing AVN. The diagnosis of AVN was confirmed with signal loss of the scaphoid on MRI T1. A dynamic contrast-enhanced MRI was performed for further assessment of the proximal pole vascularity and treatment planning...
2016: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/27466049/technique-for-3-dimesional-3d-modeling-of-osteoarticular-medial-femoral-condyle-vascularized-grafting-to-replace-the-proximal-pole-of-unsalvagable-scaphoid-nonunions
#13
Matthew T Houdek, Jane M Matsumoto, Jonathan M Morris, Allen T Bishop, Alexander Y Shin
This study describes a novel technique for the preoperative surgical planning for an osteoarticular medial femoral condyle (MFC) graft to replace the proximal pole of a scaphoid. In cases of proximal pole scaphoid nonunion or in Preiser disease, fragmentation of the articular surface can occur, leading to significant pain and disability. Osteoarticular MFC bone grafting can be used to treat these injuries by providing a vascularized osteoarticular surface. Using 3-dimensional imaging and printing we are able to precisely model the injured scaphoid, and also accurately plan the harvest of MFC osteoarticular graft...
September 2016: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/27456020/radiocarpal-injuries-cone-beam-computed-tomography-arthrography-magnetic-resonance-arthrography-and-arthroscopic-correlation-among-21-patients
#14
N Suojärvi, V Haapamäki, N Lindfors, S K Koskinen
BACKGROUND AND AIMS: Patients with acute or chronic wrist pain often undergo wrist arthroscopy for evaluation of chondral and ligamentous abnormalities. The purpose of this study was to compare findings of wrist arthroscopy with cone beam computed tomography arthrography and magnetic resonance arthrography. MATERIALS AND METHODS: Altogether, 21 patients with wrist pain underwent cone beam computed tomography arthrography, magnetic resonance arthrography, and wrist arthroscopy...
July 25, 2016: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/27436058/mri-shows-a-high-incidence-of-carpal-fractures-in-children-with-posttraumatic-radial-sided-wrist-tenderness
#15
Peter Jørgsholm, Niels Thomsen, Jack Besjakov, Sven Abrahamsson, Anders Björkman
Background and purpose - The epidemiology and optimal diagnostics of wrist injuries in children are not knotwn. We describe fractures revealed by magnetic resonance imaging (MRI) in a prospective population of children and adolescents with posttraumatic radial-sided wrist tenderness, and compare the diagnostic value of radiographs and computed tomography (CT) with that of MRI. Patients and methods - From 2004 to 2007, patients less than 18 years of age who presented at our emergency department were included in the study...
October 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27381614/short-mri-protocol-for-excluding-traumatic-lesions-of-the-scaphoid-bone-in-children
#16
Aikaterini Kanavaki, Christophe Draenert, Dimitri Ceroni, Sylviane Hanquinet
BACKGROUND/AIM: Management of scaphoid trauma includes imaging with repeated X-rays whose interpretation is difficult and often ambivalent. The aim of the study was to propose a fast magnetic resonance imaging (MRI) protocol permitting exclusion of traumatic lesions of the scaphoid bone in children, which would avoid unnecessary immobilization and irradiation in negative cases. PATIENTS AND METHODS: Two pediatric radiologists retrospectively reviewed the X-rays and MRIs of 45 children with clinical suspicion of scaphoid trauma...
July 2016: In Vivo
https://www.readbyqxmd.com/read/27311074/-comparison-of-the-results-of-lundborg-s-and-sirotakova-s-resection-suspension-arthroplasty-for-the-treatment-of-trapeziometacarpal-joint-osteoarthritis
#17
H Zajonc, B Grill, F Simunovic, F Lampert, G B Stark, V Penna
BACKGROUND AND AIMS: The aim of this prospective randomised study was to compare Sirotakova's and Lundborg's methods of resection-suspension arthroplasty using the abductor pollicis longus tendon in the surgical treatment of osteoarthritis of the trapeziometacarpal joint. PATIENTS AND METHODS: Between 2009 and 2012, 38 patients (29 female, 9 male) with symptomatic trapeziometacarpal osteoarthritis (34% stage II, 58% stage III and 8% stage IV according to the Eaton-Littler classification) were randomly allocated to one of the surgical methods (mean age 62...
June 2016: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/27247743/the-role-of-lunate-morphology-on-scapholunate-instability-and-fracture-location-in-patients-treated-for-scaphoid-nonunion
#18
Byoung-Jin Kim, David Kovacevic, Young-Min Lee, Jong-Hwan Seol, Myung-Sun Kim
BACKGROUND: To determine the association between lunate morphology and the scapholunate instability using radiographic images, and investigate the association between lunate morphology and scaphoid fracture location. METHODS: Between January 2003 and December 2011, we retrospectively evaluated the plain radiographs and computed tomography (CT) images of 70 patients who underwent surgical intervention for a scaphoid nonunion, in order to determine the association between lunate type (I or II) and scapholunate instability or scaphoid fracture location...
June 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27213695/mr-detected-features-of-inflammation-and-erosions-occur-in-symptom-free-persons-from-the-general-population
#19
L Mangnus, H W van Steenbergen, M Reijnierse, A H M van der Helm-van Mil
OBJECTIVE: The use of MR-detected inflammation and joint-damage in the diagnostic process of rheumatoid arthritis is recommended by a EULAR-imaging taskforce. This recommendation is based on the sensitivity of MR and not on specificity. Knowledge on the prevalence of MR-detected features in symptom-free persons, however, is pivotal when considering MR for diagnostic purposes. METHODS: From November 2013-December 2014, 196 symptom-free persons from different age categories were recruited from the general population...
May 23, 2016: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/27183404/imaging-of-sports-related-hand-and-wrist-injuries-sports-imaging-series
#20
Eric Cockenpot, Guillaume Lefebvre, Xavier Demondion, Christophe Chantelot, Anne Cotten
Hand and wrist injuries are common occurrences in amateur and professional sports and many of them are sport-specific. These can be divided into two categories: traumatic injuries and overuse injuries. The aim of this article is to review the most common hand and wrist sports-related lesions. Acute wrist injuries are predominantly bone fractures, such as those of the scaphoid, hamate hook, and ulnar styloid. Ligament lesions are more challenging for radiologists and may lead to carpal instability if undiagnosed...
June 2016: Radiology
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