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https://www.readbyqxmd.com/read/29901478/coronal-fracture-of-the-lunate-in-advanced-kienb%C3%A3-ck-disease-reestablishing-midcarpal-congruency-to-enable-osteochondral-reconstruction-a-case-report
#1
Joshua A Gillis, James P Higgins
CASE: We describe a patient with Bain grade-2b Kienböck disease with a coronal fracture of the distal lunate articular surface with proximal structure collapse. To reestablish midcarpal congruity, we used a bone-anchored suture to repair the coronal split in the lunate in preparation for lunate preservation with osteochondral medial femoral trochlea (MFT) reconstruction. CONCLUSION: In Bain grade-2b Kienböck disease, lunate reconstruction of both the proximal and distal joint surfaces can be performed...
June 13, 2018: JBJS Case Connector
https://www.readbyqxmd.com/read/29894391/dorsolateral-biplane-closing-radial-osteotomy-and-lunate-fixation-for-stage-iiic-kienb%C3%A3-ck-disease-a-new-surgical-approach
#2
Sergi Barrera-Ochoa, David Campillo-Recio, Tryno Muñoz-Perdomo, Ignacio Esteban-Feliu, Gerardo Mendez-Sanchez, Xavier Mir-Bullo
The treatment of advanced-stage Kienböck disease (KD) remains highly controversial. Particularly important is stage IIIC KD, which includes patients with a lunate coronal fracture. The purpose of this paper was to describe a new approach to KD in patients with Lichtman stage IIIC KD, and our results using it. The procedure combines a dorsolateral biplane closing radial osteotomy and lunate fixation. A total of 11 patients from January 2002 through December 2016 with documented KD who underwent this technique were included...
June 11, 2018: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/29878993/human-acellular-dermis-as-spacer-for-small-joint-arthroplasty-analysis-of-revascularization-in-a-rabbit-trapeziectomy-model
#3
Kian Banks, Lee Squiteri, Athanasios Bramos, Maxwell B Johnson, Daniel J Gardner, Austin Pourmoussa, Eunson Jung, Gene Lee, David Perrault, Alexander Fedenko, Gene H Kim, Bo Han, Young-Kwon Hong, David A Kulber, Alex K Wong
BACKGROUND: Carpometacarpal (CMC) osteoarthritis affects 8-12% of the general population. Surgical management provides symptomatic relief for 78% of patients who fail conservative therapy, but little consensus exists regarding which surgical procedure provides superior patient outcomes. Recent human trials substituted exogenous acellular dermal matrices (ADMs) in the bone space, but there is no quantitative histological data on the outcome of ADMs in this environment. We aimed to quantify the revascularization and recellularization of ADMs in the joint space using a rabbit model...
June 5, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29876786/reliability-of-computer-assisted-periacetabular-osteotomy-using-a-minimally-invasive-approach
#4
Sepp De Raedt, Inger Mechlenburg, Maiken Stilling, Lone Rømer, Ryan J Murphy, Mehran Armand, Jyri Lepistö, Marleen de Bruijne, Kjeld Søballe
BACKGROUND: Periacetabular osteotomy (PAO) is the treatment of choice for younger patients with developmental hip dysplasia. The procedure aims to normalize the joint configuration, reduce the peak-pressure, and delay the development of osteoarthritis. The procedure is technically demanding and no previous study has validated the use of computer navigation with a minimally invasive transsartorial approach. METHODS: Computer-assisted PAO was performed on ten patients...
June 6, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29868414/indirect-scapholunate-ligament-repair-all-arthroscopic
#5
David Bustamante Suárez de Puga, Román Cebrián Gómez, Javier Sanz-Reig, Jesús Más Martínez, Manuel Morales Santías, Carmen Verdú Román, Enrique Martínez Giménez
The arthroscopic technique most frequently used in acute scapholunate instability is reduction and fixation with Kirschner wires. To repair the injured ligament, open surgery and dorsal capsular plication are recommended, but this procedure has the risk of damaging secondary dorsal stabilizers, the dorsal blood supply, and the proprioceptive innervation of the posterior interosseous nerve. In this report, we present an all-arthroscopic technique of a dorsal reconstruction of the scapholunate interosseous ligament for scapholunate instability using a tape by tethering the scaphoid to the lunate...
May 2018: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29804695/the-parallelogram-effect-the-association-between-central-band-and-positive-ulnar-variance
#6
Jorge L Orbay, Fernando Levaro-Pano, Lauren L Vernon, Michael H Cronin, Jorge A Orbay, Edward J Tremols
PURPOSE: Ulnar impaction syndrome is a poorly understood degenerative wrist condition characterized by symptoms of pain thought to be caused by increased loads between the ulnar head and the carpals. Radiographic evaluation often reveals an ulnar-positive wrist. We hypothesize that progressive elongation of the central band of the forearm interosseous ligaments changes the longitudinal radial-ulnar relationships, resulting in an ulnar-positive wrist. The objective of the study was to identify a relationship between the loss of integrity of the forearm interosseous ligaments and increased ulnar variance...
May 24, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29737387/-all-about-the-lunate-bone
#7
M Schädel-Höpfner
No abstract text is available yet for this article.
May 2018: Der Unfallchirurg
https://www.readbyqxmd.com/read/29734911/three-year-review-of-dorsal-plating-for-complex-intra-articular-fractures-of-the-distal-radius
#8
Michelle Spiteri, Wayne Ng, Jamie Matthews, Dominic Power, Mark Brewster
BACKGROUND: The volar approach is commonly used for plating intra-articular fractures of the distal radius. Despite this, certain fracture configurations are more suitable for dorsal plate fixation. This technique has not gained favour due to the reported high incidence of extensor tendon irritation and attrition ruptures. With the advent of lower profile plates this risk has decreased. METHODS: We report on forty-six cases performed in a tertiary hand centre between January 2011 and May 2014...
June 2018: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/29650378/long-term-clinical-outcome-after-titanium-lunate-arthroplasty-for-kienb%C3%A3-ck-disease
#9
Timo Viljakka, Kaj Tallroth, Martti Vastamäki
PURPOSE: Titanium lunate arthroplasty (TLA) for Kienböck disease was introduced in 1984 to address the silicone-wear particle problem common to silicone lunate implants. We sought to study the outcome of TLA. METHODS: We identified 11 patients from our hospital database who had undergone TLA between 2001 and 2010. We evaluated pain, range of motion (ROM), function, and radiological outcome at a mean 11 years after surgery. We compared preoperative ROM and radiological findings with final follow-up in the ipsilateral wrist and also made comparisons with the contralateral wrists...
April 9, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29644422/-etiology-diagnostics-and-classification-of-lunate-bone-necrosis
#10
REVIEW
T Lögters, C Büren, J Windolf
Kienböck's disease, also known as avascular necrosis of the lunate bone describes the slowly progressive osteonecrosis of the lunate bone with secondary development of osteoarthritis and carpal collapse. In order to emphasize the atraumatic origin of the disease, this is normally referred to as aseptic, idiopathic or avascular lunate necrosis. There are thought to be a number of factors predisposing to Kienböck's disease, such as ulnar negative variance, the shape of the lunate itself and various types of vascular anatomy...
May 2018: Der Unfallchirurg
https://www.readbyqxmd.com/read/29629872/radical-and-lunatic-fringes-modulate-notch-ligands-to-support-mammalian-intestinal-homeostasis
#11
Preetish Kadur Lakshminarasimha Murthy, Tara Srinivasan, Matthew S Bochter, Rui Xi, Anastasia Kristine Varanko, Kuei-Ling Tung, Fatih Semerci, Keli Xu, Mirjana Maletic-Savatic, Susan E Cole, Xiling Shen
Notch signalling maintains stem cell regeneration at the mouse intestinal crypt base and balances the absorptive and secretory lineages in the upper crypt and villus. Here we report the role of Fringe family of glycosyltransferases in modulating Notch activity in the two compartments. At the crypt base, RFNG is enriched in the Paneth cells and increases cell surface expression of DLL1 and DLL4. This promotes Notch activity in the neighbouring Lgr5 + stem cells assisting their self-renewal. Expressed by various secretory cells in the upper crypt and villus, LFNG promotes DLL surface expression and suppresses the secretory lineage ...
April 9, 2018: ELife
https://www.readbyqxmd.com/read/29624658/primary-visual-cortex-in-neandertals-as-revealed-from-the-occipital-remains-from-the-el-sidr%C3%A3-n-site-with-emphasis-on-the-new-sd-2300-specimen
#12
Antonio García-Tabernero, Angel Peña-Melián, Antonio Rosas
The comparative analysis of the endocranial surface of the El Sidrón new occipital fragment SD-2300 shows meaningful differences in the configuration of the occipital pole region between neandertals and anatomically modern humans (AMH). The particular asymmetries found in neandertals in the venous sinus drainage and the petalial patterns are recognizable in this new specimen as well. In addition, the supra- and infracalcarine fossae of the occipital pole region appear to deviate obliquely from the mid-line when compared with sapiens...
July 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29602655/correlation-of-the-lateral-wrist-radiograph-to-ulnar-variance-a-cadaveric-study
#13
Derek T Bernstein, Joshua D Linnell, Nancy J Petersen, David T Netscher
PURPOSE: Both positive and negative ulnar variance have been implicated in a variety of wrist disorders. Surgery aims to correct the variance in these pathologic conditions. This necessitates accurate and reproducible measuring tools; however, the most accurate radiographic measurement technique remains unclear. The purposes of this study were to evaluate 3 methods for determining ulnar variance and to compare each with direct anatomic measurement in a cadaver model. METHODS: We fixed 10 fresh above-elbow cadaver specimens in neutral rotation and obtained standardized fluoroscopic posteroanterior and lateral wrist images...
March 27, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29576921/morphological-associations-between-the-distal-radioulnar-joint-and-the-lunate
#14
Flavien Mauler, Jean-Yves Beaulieu
Background  Variations in morphology of the carpal bones have been described. Their implication in wrist disease and specific kinematic features has been recognized, and a better knowledge of these variations is essential. Questions/Purpose  To radiographically determine any association between the morphological variations of the distal radioulnar joint (DRUJ) and the lunate bone. Materials and Methods  Radiographs of 100 wrists of patients presenting to the emergency department with wrist pain and referred to our outpatient clinic were retrospectively reviewed for DRUJ inclination, ulnar variance, and radiocarpal and midcarpal morphology of the lunate...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29576920/cadaveric-testing-of-a-novel-scapholunate-ligament-reconstruction
#15
Lana Kang, Christopher J Dy, Mike T Wei, Krystle A Hearns, Michelle G Carlson
Background  Existing scapholunate interosseous ligament (SLIL) reconstruction techniques include fixation spanning the radiocarpal joint, which do not reduce the volar aspect of the scapholunate interval and may limit wrist motion. Questions/Purpose  This study tested the ability of an SLIL reconstruction technique that approximates both the volar and dorsal scapholunate intervals, without spanning the radiocarpal joint, to restore static scapholunate relationships. Materials and Methods  Scapholunate interval, scapholunate angle, and radiolunate angle were measured in nine human cadaveric specimens with the SLIL intact, sectioned, and reconstructed...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29576914/biomechanics-of-an-articulated-screw-in-acute-scapholunate-ligament-disruption
#16
Matthew E Hiro, Corey J Schiffman, Muturi G Muriuki, Robert M Havey, Leonard I Voronov, Randy R Bindra
Background  An injury to the scapholunate interosseous ligament (SLIL) leads to instability in the scapholunate joint. Temporary fixation is used to protect the ligament during reconstruction or healing of the repair. Rigid screw fixation-by blocking relative physiological motion between the scaphoid and lunate-can lead to screw loosening, pullout, and fracture. Purpose  This study aims to evaluate changes in scaphoid and lunate kinematics following SLIL injury and the effectiveness of an articulating screw at restoring preinjury motion...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29576913/current-management-of-scaphoid-nonunion-based-on-the-biomechanical-study
#17
Kunihiro Oka, Hisao Moritomo
Scaphoid nonunion causes abnormal wrist kinematics and typically leads to carpal collapse and subsequent degenerative arthritis of the wrist. However, the natural history, including carpal collapse and degenerative arthritis of scaphoid nonunion, may vary at different fracture locations. This article reviews recent biomechanical studies related to the natural history of scaphoid nonunion. In the distal-type fractures (type B2 in Herbert classification), where the fracture located distal to the scaphoid apex, the proximal scaphoid fragment and lunate, which are connected through the dorsal scapholunate interosseous ligament (DSLIL) and dorsal intercarpal ligament (DIC), extend together, and the distal fragment of the scaphoid flexes individually...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29573896/kienb%C3%A3-ck-disease-in-the-skeletally-immature-patient
#18
REVIEW
Ahmadreza Afshar
Kienböck disease is uncommon in skeletally immature patients. Although there is no gold standard treatment for Kienböck disease in the skeletally immature patient, surgical and nonsurgical treatment options have been shown to be effective. Initial immobilization with a cast, protection with an orthosis, and avoidance of repetitive forceful activities have been shown to be effective in some cases. Surgery may be offered to the skeletally immature patient when nonsurgical treatment is ineffective. Among several surgical techniques used for treatment in the skeletally immature patient with Kienböck disease, distal radial osteotomies have been the most frequently performed surgery; however, radial overgrowth is a concern...
May 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29573895/the-effect-of-dorsally-angulated-distal-radius-deformities-on-carpal-kinematics-an-in-vitro-biomechanical-study
#19
Clare E Padmore, Helen Stoesser, Masao Nishiwaki, Braden Gammon, G Daniel G Langohr, Emily A Lalone, James A Johnson, Graham J W King
PURPOSE: The purpose was to quantify the effect of distal radius dorsal angulation (DA) on carpal kinematics and the relative roles of the radiocarpal and midcarpal joints during wrist motion. METHODS: Six cadaveric specimens (69 ± 17 y) were mounted at 90° elbow flexion in a custom wrist motion simulator. The wrist was guided through planar passive flexion and extension motion trials (∼ 5°/s). A custom modular distal radius implant was used to simulate native alignment and 3 distal radius DA deformities (10°, 20°, 30°)...
March 21, 2018: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29557680/comparison-of-radiographic-and-intraoperative-visual-assessment-of-scaphotrapezoid-joint-arthritis-in-patients-with-end-stage-carpometacarpal-arthritis-of-the-thumb-base
#20
Anil Akoon, Louis C Grandizio, Gaurav G Mookerjee, Jove Graham, Joel C Klena
BACKGROUND: The purpose of this investigation is to compare the radiographic and intraoperative assessment of scaphotrapezoid (ST) joint arthritis in patients with end-stage carpometacarpal (CMC) arthritis of the thumb base. We aim to define the incidence of ST arthritis in this population and determine whether radiographic features such as lunate morphology, dorsal intercalated segment instability (DISI), and scapholunate (SL) diastasis are associated with the incidence of ST arthritis...
March 1, 2018: Hand: Official Journal of the American Association for Hand Surgery
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