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https://www.readbyqxmd.com/read/27902167/arthroscopic-limited-intercarpal-fusion-without-bone-graft-in-patients-with-kienb%C3%A3-ck-s-disease
#1
Kadir Ertem, Gökay Görmeli, Mustafa Karakaplan, Okan Aslantürk, Yunus Karakoç
OBJECTIVES: This study aims to present our clinical results obtained in arthroscopic limited intercarpal fusion performed without using bone graft in patients with Kienböck's disease. PATIENTS AND METHODS: The study included 11 patients with Kienböck's disease (6 males, 5 females; mean age 28.9 years; range 14 to 51 years) who were performed arthroscopic lunate excision and scaphocapitate fusion between November 2012 and December 2013. Bain and Begg Arthroscopic Classification was used for the staging of Kienböck's disease...
December 2016: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/27890195/-carpal-malalignment-following-distal-radius-fracture
#2
B Coulet, M-O Gauci, C Lazerges, M Chammas
Adaptive carpal malalignment is the consequence of malunion of the distal radius. Since the radial metaphysis and capitate have to be aligned, any disorientation of the radial epiphysis will force the proximal carpal row to adapt, as it is the only mobile element. There are two types of adaptation depending where the compensative occurs: (1) midcarpal - leading to flexion between the lunate and capitate, with the lunate maintaining a normal relationship with the radial epiphysis axis; (2) radiocarpal - combining flexion and dorsal displacement of the lunate relative to the axis of the radial epiphysis, with the midcarpal joint remaining aligned...
December 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27856939/magnetic-resonance-imaging-investigation-of-radio-lunate-relations-use-in-assessing-distal-radial-fracture-reduction
#3
G Medlock, J M Wohlgemut, I M Stevenson, A J Johnstone
: Reformatted magnetic resonance imaging scans of 27 normal wrists were examined in incremental degrees of rotation around the central axis of the radial shaft to 30° in both directions from true lateral. A line was superimposed on the outer border of the radial dorsal cortex and continued distally to the carpal region. Measurements were made from the superior pole of the lunate to this line. This distance did not change significantly with rotation. This allows a quick and accurate way of assessing distal radial fracture reduction from poorly taken lateral radiographs...
November 16, 2016: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/27855045/-four-corner-fusion-in-patients-with-wrist-arthritis
#4
María Francisca Vázquez-Alonso, Alberto Viñas-Silva
Scapholunate advance collapse (SLAC) and Scaphoid nonunion advance collapse (SNAC), are the two most common patterns of postraumatic wrist arthritis. SLAC wrist develops after attenuation, either traumatically or atraumatically, of the scapholunate ligament. Atraumatic causes of SLAC wrist include calcium pyrophosphate dehydrate deposition disease, reumathoid arthritis, neuropathic diseases, and b2-microglobulin asociated amyloid deposition diseases. On the other hand, SNAC wrist develops following a scahpoid fracture that has progressed to a nonunion...
2016: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/27852021/-neuroanatomy-of-the-parietal-association-areas
#5
Yasushi Kobayashi
The parietal association cortex comprises the superior and inferior parietal lobules, the precuneus and the cortices in the intraparietal, parietooccipital and lunate sulci. By processing somatic, visual, acoustic and vestibular sensory information, the parietal association cortex plays a pivotal role in spatial cognition and motor control of the eyes and the extremities. Sensory information from the primary and secondary somatosensory areas enters the superior parietal lobule and is transferred to the inferior parietal lobule...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27847848/a-slightly-dorsally-tilted-lunate-on-mri-can-be-considered-normal
#6
Anne-Carolin Döring, Celeste L Overbeek, Teun Teunis, Stéphanie J E Becker, David Ring
BACKGROUND: Abnormal angulation of the lunate can be an indication of intercarpal pathology. On magnetic resonance images (MRIs) the lunate often looks dorsally angulated, even in healthy wrists. The tilt on individual slices can also be different and might be misinterpreted as pathological, contributing to inaccurate diagnoses and unnecessary surgery. The primary aim of this study was to determine the average radiolunate angle on sagittal wrist MRI images as well as the radiolunate angle in the most radial, central and most ulnar part of the lunate; also the interobserver reliability was determined...
October 2016: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/27846305/time-to-decide-dynamical-analysis-predicts-partial-tip-stalk-patterning-states-arise-during-angiogenesis
#7
Lakshmi Venkatraman, Erzsébet Ravasz Regan, Katie Bentley
Angiogenesis is a highly dynamic morphogenesis process; however, surprisingly little is known about the timing of the different molecular processes involved. Although the role of the VEGF-notch-DLL4 signaling pathway has been established as essential for tip/stalk cell competition during sprouting, the speed and dynamic properties of the underlying process at the individual cell level has not been fully elucidated. In this study, using mathematical modeling we investigate how specific, biologically meaningful, local conditions around and within an individual cell can influence their unique tip/stalk phenotype switching kinetics...
2016: PloS One
https://www.readbyqxmd.com/read/27788281/locomotor-hand-postures-carpal-kinematics-during-wrist-extension-and-associated-morphology-in-anthropoid-primates
#8
Caley M Orr
The biomechanics of wrist extension (or dorsiflexion) are important for understanding functional adaptation of the primate hand because extension mobility varies with habitual locomotor hand posture and facilitates certain manipulative tasks. Here, intercarpal kinematics are employed to investigate mechanisms underlying wrist extension in a sample of anthropoids representing various arboreal and terrestrial locomotor modes. Carpal kinematics are studied using computed-tomography of cadaveric forelimbs, and these data are combined with a morphometric analysis of biomechanically-informative anatomical features...
October 27, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27782999/a-three-dimensional-micro-computed-tomographic-study-of-the-intraosseous-lunate-vasculature-implications-for-surgical-intervention-and-the-development-of-avascular-necrosis
#9
Nick A van Alphen, Mohamed Morsy, Alexis T Laungani, Assaf Kadar, Andrew J Vercnocke, Nirusha Lachman, Erik L Ritman, Steven L Moran
BACKGROUND: The purpose of this study was to use micro-computed tomography to demonstrate the intraosseous vascularity of the lunate within a three-dimensional orientation to identify areas of greatest perfusion and define vascular "safe zones" for surgical intervention. METHODS: Fourteen upper extremities were injected with a lead-based contrast agent. The lunates were harvested and scanned using a micro-computed tomography scanner. The intraosseous vascularity was incorporated into a three-dimensional image...
November 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27781983/idiopathic-bilateral-lunate-and-triquetrum-avascular-necrosis-a-case-report
#10
L Amsallem, J Serane, D Zbili, B Marion, P Boyer
We report on the case of bilateral avascular osteonecrosis (AVN) of the lunate and triquetrum in a 45-year-old woman without any relevant medical history for which the cause could not be established. She was treated conservatively with splinting and analgesics. The patient was able to pursue her work and hobbies with subnormal range of motion at 1-year follow-up. AVN of the triquetrum is very rare, as it is a richly vascularized bone. The presence of AVN in multiple carpal bones has only been described in patients receiving high doses of corticosteroids...
October 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27777826/lunate-fragments-in-unstable-scaphoid-nonunion-wrists-affect-or-effect
#11
Paul W L Ten Berg, Mario Maas, Simon D Strackee
No abstract text is available yet for this article.
November 2016: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/27777823/ulnar-sided-wrist-pain-due-to-long-ulnar-styloid-a-case-report
#12
Zahab S Ahsan, Michael Rivlin, Jesse B Jupiter
Ulnar styloid impaction syndrome involves repetitive friction between an excessively long ulnar styloid and the carpus, resulting in chondromalacia, synovitis, and pain. The arthroscopic diagnosis, evaluation, and management of this syndrome are not well characterized. We present a patient with chronic wrist pain of unknown origin, culminating with arthroscopic findings demonstrating substantial loss of articular cartilage on both the lunate and triquetrum. The patient successfully underwent operative ulnar styloid excision, ultimately resolving chronic wrist pain symptomology...
November 2016: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/27777822/the-role-of-dynamic-4d-ct-in-the-detection-of-scapholunate-ligament-injury
#13
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/27777816/stage-iii-advanced-wrist-collapse-treatment-options-a-cadaveric-study
#14
Jorge Chahla, Jason M Schon, Ramiro Olleac, Sebastián Senes, Damián Arroquy, Chase S Dean, Gabriel Clembosky, Alvaro Muratore
Background Scapholunate advanced collapse and scaphoid nonunion advanced collapse result in high morbidity and pose significant challenges for active patients. Multiple treatment options have been proposed to yield satisfactory results; however, restoration of physiological wrist motion remains an issue. Questions/Purposes The objective of this study was to compare wrist mobility after four different treatment methods for grade III wrist collapse: (1) no treatment, (2) scaphoidectomy and lunate-capitate arthrodesis, (3) scaphoidectomy, lunate-capitate arthrodesis, and triquetrum-hamate arthrodesis, and (4) scaphoidectomy, lunate-capitate arthrodesis, and triquetrum excision...
November 2016: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/27777814/kienb%C3%A3-ck-disease-and-arthroscopy-assessment-classification-and-treatment
#15
Gregory I Bain, Simon B M MacLean, Wing-Lim Tse, Pak-Cheong Ho, David M Lichtman
The assessment and management of Kienböck Disease (KD) has always been a conundrum. The Lichtman classification has traditionally been used to guide treatment based on imaging. Arthroscopy provides a direct visualization of the articular surface, allows probing of the surfaces, and enables minimally invasive techniques to be performed. The Lichtman-Bain classification is a new classification that takes into account the osseous, vascular, and cartilage aspects of the lunate and the secondary effects on the wrist...
November 2016: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/27777813/the-etiology-and-pathogenesis-of-kienb%C3%A3-ck-disease
#16
Gregory Ian Bain, Simon Bruce Murdoch MacLean, Chong Jin Yeo, Egon Perilli, David M Lichtman
Kienböck disease is a condition that typically occurs in the "at-risk" patient, in the "at-risk" aspect of the proximal condyle of the "at-risk" lunate. In the active male, repetitive loading causes the stress fracture that commences in the single layer proximal subchondral bone plate. The lunate fracture commences at the point the lunate cantilevers over the edge of the distal radius, and then takes on the shape of the radius. We postulate that the stress fracture violates the parallel veins of the venous subarticular plexus-leading to localized venous hypertension and subsequent ischemia and edema of the fatty marrow...
November 2016: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/27765057/new-classification-of-lunate-fossa-fractures-of-the-distal-radius
#17
Jun Zhang, Xin Ran Ji, Ye Peng, Jian Tao Li, Li Hai Zhang, Pei Fu Tang
BACKGROUND: A die-punch fracture is a depression fracture of the lunate fossa of the distal radius. We propose a morphological classification of die-punch fractures that includes five types: center depression fractures, vertical depression fractures, volar depression fractures, dorsal depression fractures, and double die-punch fractures. METHODS: The radiographs of 112 die-punch fractures treated between January 2005 and January 2015 were retrospectively reviewed...
October 21, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27740466/transverse-translunate-fracture-dislocation-a-rare-injury
#18
S Mahjoub, B Dunet, P Thoreux, A C Masquelet
Perilunate fracture-dislocation is rare. We report the case of a 24-year-old male who fell from his motorcycle and presented with a transverse lunate fracture with perilunate ligament damage. The initial diagnosis based on X-rays was confirmed by CT scan. A dorsal approach was used to obtain good reduction, double screw fixation and ligament reinsertion protected by temporary K-wires. To the best of our knowledge, this is the first case of transverse lunate fracture within perilunate fracture-dislocation. The patient returned to normal activities after 6 months...
June 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27703938/novel-presentation-of-uncommon-wrist-injury-simultaneous-lunate-and-perilunate-fracture-dislocation-scapho-capitate-syndrome-of-both-wrists
#19
Anil K Bhat, Nishanth A, Ashwath Acharya, Yogesh Kumar
INTRODUCTION: Perilunate and lunate dislocations are uncommon high energy injuries and have extensive soft tissue, cartilaginous and bony damage. The most common pattern is trans-scaphoid perilunate fracture dislocation which constitutes approximately 50% of these injuries. Unusual injury pattern like Scaphocapitate syndrome can occur with fracture through scaphoid waist and capitate that rotates the proximal capitate 180° so that its proximal articular surface points distally. With this case report, we would like to present a novel presentation of an uncommon wrist injury...
April 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/27703801/trans-4-portal-as-a-new-portal-for-accessing-the-lunate-in-wrist-arthroscopy-a-cadaveric-study
#20
Reza Shahryar-Kamrani, Hossein Saremi, Leila Oryadi-Zanjani, Mohammad Hossein Nabian, Azita Amoozadeh, Amir Hossein Moradi
BACKGROUND: Evolving wrist arthroscopy requires creating new portals, and creating portals reciprocally leads to increased indications for arthroscopic wrist procedures. To facilitate access to the lunate bone and fossa for new arthroscopic procedures, a new portal was used. This is a cadaveric study of this portal. OBJECTIVES: In this cadaveric study, we evaluated a portal in wrist arthroscopy for procedures involving the lunate bone and lunate fossa. MATERIALS AND METHODS: Seventeen wrists from 10 fresh cadavers were included in this study...
July 2016: Iranian Red Crescent Medical Journal
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