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https://www.readbyqxmd.com/read/28525962/association-of-lunate-morphology-with-carpal-instability-in-scapholunate-ligament-injury
#1
Eric Quan Pang, Nathan Douglass, Robin N Kamal
BACKGROUND: We examined the relationship between lunate morphology (type 1 without a medial facet; type II with a medial facet) and dorsal intercalated segmental instability (DISI) in patients with scapholunate ligament injuries. We tested the primary null hypothesis that there is no relationship between lunate morphology and development of DISI. Secondary analysis compared the agreement of classifying lunate morphology based on the presence of a medial lunate facet, capitate-to-triquetrum (CT) distance, and magnetic resonance imaging (MRI)...
May 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28522258/high-resolution-3%C3%A2-t-mri-of-traumatic-and-degenerative-triangular-fibrocartilage-complex-tfcc-abnormalities-using-palmer-and-outerbridge-classifications
#2
T Nozaki, G Rafijah, L Yang, T Ueno, S Horiuchi, D Hitt, H Yoshioka
AIM: To investigate the usefulness of high-resolution 3 T magnetic resonance imaging (MRI) for the evaluation of traumatic and degenerative triangular fibrocartilage complex (TFCC) abnormalities among three groups: patients presenting with wrist pain who were (a) younger than age 50 years or (b) age 50 or older (PT<50 and PT≥50, respectively), and (c) asymptomatic controls who were younger than age 50 years (AC). MATERIALS AND METHODS: High-resolution 3 T MRI was evaluated retrospectively in 96 patients, including 47 PT<50, 38 PT≥50, and 11 AC...
May 15, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28510199/taxonomic-placement-of-paphiopedilum-rungsuriyanum-cypripedioideae-orchidaceae-based-on-morphological-cytological-and-molecular-analyses
#3
Yung-I Lee, Mei-Chu Chung, Kongmany Sydara, Onevilay Souliya, Sulivong Luang Aphay
BACKGROUND: Paphiopedilum rungsuriyanum from Northern Laos was discovered and described in 2014. It is characterized by having miniature tessellated leaves, a flower having a helmet shaped lip with a V-shaped neckline, and a semi-lunate, 3-dentate staminode with an umbo. These morphological features distinguish P. rungsuriyanum from the other known sections/subgenera of Paphiopedilum, making it difficult to group with existing infrageneric units. RESULTS: Paphiopedilum rungsuriyanum has chromosome number of 2n = 26...
December 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28507968/posttraumatic-static-volar-intercalated-segment-instability-iatrogenic-or-missed-injury
#4
Vishnu Senthil, Imthias V Kottamttavide, Hitesh Shah
INTRODUCTION: Carpal instability is broad category consisting of various patterns of injury, with dissociative type more common. CASE REPORT: A 13 -year -old boy presented at 6 months following a fall with restriction of wrist movements. Patient had sustained a closed distal one -third both bones fracture forearm fixed with K -wire, and volar lunate instability was found during sequential follow -up. CONCLUSION: Posttraumatic carpal instability should be identified at the earliest to avoid poor hand function and morbidity associated with it...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28495027/medial-femoral-condyle-microvascular-bone-transfer-as-a-treatment-for-capitate-avascular-necrosis-surgical-technique-and-case-report
#5
Nikolas H Kazmers, Joshua C Rozell, Kevin M Rumball, Scott H Kozin, Dan A Zlotolow, L Scott Levin
Avascular necrosis (AVN) of the capitate is a rare clinical entity for which a variety of treatment options have been described, ranging from immobilization to microvascular bone transfer. Outcomes following medial femoral condyle corticocancellous free flap reconstruction have not been reported for this specific pathology. We present the case of a 16-year-old girl with posttraumatic capitate AVN who was treated with curettage and medial femoral condyle corticocancellous vascularized bone grafting. At 18 months after surgery, the patient remains pain-free and had resumed all activities including lifeguarding by 6 months after surgery...
May 9, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28473231/arthroscopic-reconstruction-for-unstable-scaphoid-non-union
#6
P J Delgado-Serrano, I Jiménez-Jiménez, M Nikolaev, F A Figueredo-Ojeda, M Gil de Rozas-López
OBJECTIVE: To evaluate the results of arthroscopic reconstruction for the treatment of unstable scaphoid non-union with cancellous bone autograft. METHODS: 13 patients were treated with a mean age of 26 (18-45) years. The average time from injury until surgery was 14 (6-48) months. Preoperative and postoperative clinical and radiological parameters were evaluated. Mean follow-up was 16.8 (12-36) months. RESULTS: Consolidation was achieved in all cases at 7 (4-10 weeks), no patient had complications or reoperations...
May 1, 2017: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/28465193/clinical-outcomes-of-proximal-row-carpectomy-by-preoperative-midcarpal-joint-morphological-classification-viegas-type-i-versus-type-ii
#7
A Toffoli, H Lenoir, C Lazerges, B Coulet, M Chammas
The midcarpal joint can be classified into two anatomical types - Viegas type I and Viegas type II - based on the absence or presence of a medial facet for the hamate on the lunate (lunohamate facet). Type I is associated with a round capitate shape, which theoretically allows better congruence with the lunate fossa of the distal radius following proximal row carpectomy (PRC). This morphological feature has never been considered as a predictive factor of clinical outcome for this surgical procedure. This study aimed to compare the clinical and radiological outcomes of the two Viegas types following PRC...
February 28, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28458971/successful-arthroplasty-using-cadaveric-meniscus-for-osteochondral-defects-in-the-wrist-and-hand-joints
#8
Don Hoang, Vivi W Chen, Daniel J Gould, Myles J Cohen, David A Kulber
BACKGROUND: Osteochondral defects of the radiocarpal, metacarpophalangeal (MCP), and proximal interphalangeal (PIP) joints often necessitate joint arthrodesis or mechanical arthroplasty, which has a limited lifespan. In severely arthritic wrist and finger joints, we propose a novel adjunct for joint salvage using cadaveric meniscus for joint resurfacing as an off-the-shelf alternative to address osteochondral defects and restore normal intraarticular contact stress. METHODS: A total of 14 patients with osteochondral defects in 5 radiocapitate, 5 MCP, 3 PIP, and 1 carpometacarpal joints received cadaveric meniscus to facilitate arthroplasty...
March 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28453343/acute-isolated-flexor-tendon-laceration-associated-with-a-distal-radius-fracture
#9
J Ryan Hill, Ram K Alluri, Alidad Ghiassi
BACKGROUND: Subacute rupture of the flexor tendons secondary to distal radius fractures is well documented. Recently, accounts of flexor tendon rupture following open reduction internal fixation have been associated with volar plate fixation. However, discovery of an occult traumatic flexor tendon laceration during fixation of an acute distal radius fracture is not well described. This case indicates the importance of careful preoperative and intraoperative examination of the flexor tendons in the setting of comminuted distal radius fractures...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28453342/flexor-tendon-rupture-due-to-previously-undiagnosed-kienb%C3%A3-ck-disease-a-case-report
#10
Kenrick Turner, Nicholas N Sheppard, Samuel E Norton
BACKGROUND: Spontaneous flexor tendon rupture is rare and most common in the little finger. The pathogenesis of spontaneous tendon ruptures is unclear but may occur through attrition or mechanical abrasion over a bony prominence. Kienböck disease is avascular necrosis of the lunate, with an unknown etiology. METHODS: We present a case of spontaneous rupture of flexor digitorum profundus due to Kienböck disease, which we believe is the first recorded case of flexor tendon rupture attributable to osteonecrosis of the lunate...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28448708/-wrist-x-ray-for-analysis-of-the-articular-surface-of-distal-radius
#11
E Vergara-Amador, R Penagos, E Pinilla
In the distal radius fracture requires radiographic views that allow you to see the articular surface without interposition. The objective was to determine whether lateral radiographic projections 7 and 22° improve the analysis of this surface. METHOD: Case series study with radiographs of healthy and operated patients, in order to identify the lunate and scaphoid facets in lateral and anteroposterior projections. Qualitative analysis was made on the radiographs of the distal radius with wedges of 7 and 22° in the lateral views and 11° in the anteroposterior view...
September 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28442856/functional-outcome-of-fixation-of-complex-intra-articular-distal-radius-fractures-with-a-variable-angle-distal-radius-volar-rim-plate
#12
M Spiteri, W Ng, J Matthews, D Power
Aim To evaluate the outcome of these complex fractures using a volar approach and the DePuy Synthes variable-angle 2.4-mm distal radius rim plate. This plate is precontoured to the volar rim for placement distal to the watershed line allowing purchase of the rim fragment of the lunate facet. Its low profile and smooth edges are designed to minimize flexor tendon irritation. Method We report on a consecutive series of far distal AO-23B3 and AO-23C3 fractures treated using this plate in a tertiary hand center between November 2011 and May 2014...
April 2017: Journal of Hand and Microsurgery
https://www.readbyqxmd.com/read/28428917/ulnolunate-ligament-avulsion-fracture-of-the-lunate-a-case-report
#13
Ryosuke Sato, Naohito Hibino, Yoshitaka Hamada, Koichi Sairyo
Traumatic lunate fractures are very rare and those treatments require an understanding of anatomical features. We present a case of an ulnolunate ligament avulsion fracture of the lunate that was successfully repaired by surgical fixation with open reduction and internal fixation. We believe that restoration of ulnolunate ligament function is important to prevent further deterioration of wrist function after this injury.
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28428912/biomechanical-evaluation-of-carpal-kinematics-during-simulated-wrist-motion
#14
Helen Stoesser, Clare E Padmore, Masao Nishiwaki, Braden Gammon, G Daniel G Langohr, James A Johnson
Background Flexion and extension of the wrist is achieved primarily at the radiocarpal and midcarpal joints. Carpal kinematics have been investigated, although there remains no consensus regarding the relative contribution of each bone to wrist motion. Purpose To determine the kinematics of the scaphoid, lunate, and capitate during unconstrained simulated wrist flexion/extension and to examine the effect of motion direction on the contribution of each bone. Materials and Methods Seven cadaveric upper extremities were tested in a passive wrist simulator with 10N tone loads applied to the wrist flexors/extensors...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28421607/laterality-and-grip-strength-influence-hand-bone-micro-architecture-in-modern-humans-an-hrpqct-study
#15
Nicolas Reina, Etienne Cavaignac, William H Trousdale, Jean-Michel Laffosse, José Braga
It is widely hypothesized that mechanical loading, specifically repetitive low-intensity tasks, influences the inner structure of cancellous bone. As such, there is likely a relationship between handedness and bone morphology. The aim of this study is to determine patterns in trabecular bone between dominant and non-dominant hands in modern humans. Seventeen healthy patients between 22 and 32 years old were included in the study. Radial carpal bones (lunate, capitate, scaphoid, trapezium, trapezoid, 1st, 2nd and 3rd metacarpals) were analyzed with high-resolution micro-computed tomography...
June 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28413989/anatomical-wrist-patterns-on-plain-radiographs
#16
Aviv Kramer, Raviv Allon, Alon Wolf, Tal Kalaiman, Idit Lavi, Ronit Wollstein
BACKGROUND: Interpreting the structure in the wrist is complicated by the existence of multiple joints as well as variability in bone shapes and anatomical patterns. Previous studies have evaluated lunate and capitate shape in an attempt to understand functional anatomical patterns. OBJECTIVE: The purpose of this study was to describe anatomical shapes and wrist patterns in normal wrist radiographs. We hypothesized that there is a significant relationship in the midcarpal joint with at least one consistent pattern of wrist anatomy...
April 17, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28398089/post-mortem-in-the-victorian-asylum-practice-purpose-and-findings-at-the-littlemore-county-lunatic-asylum-1886-7
#17
Lynsey T Cullen
This article examines the purpose of the post-mortem in the late Victorian asylum and discusses what the findings reveal about contemporary understanding of mental health. By examining the practice at the Littlemore Asylum of Oxford, the definition of the asylum post-mortem will be questioned and issues of consent and ownership of the dead body explored. It will be argued that the purpose of the examination was partly to appease the demands of the Commissioners in Lunacy, to protect the asylum against accusations of malpractice, and to appease the resident assistant medical officer's own morbid curiosity...
April 1, 2017: History of Psychiatry
https://www.readbyqxmd.com/read/28383831/-spiegelian-hernia-a-report-of-three-cases
#18
M de Marneffe, L Médart, L Collignon
Spiegelian hernia is a rare anterior abdominal wall hernia, described in 1764 by a Hungarian surgeon. It often remains undiagnosed because of its unusual location on the semilunar line, laterally to the rectus muscle. CT presentation is specific. Because of its high risk of strangulation, a surgical management should be proposed, even in case of fortuitous discovery. We present three cases of Spiegelian hernia, two fortuitously discovered and one detected on the occasion of a small bowel incarceration. We also evoke a similar case of eventration on the lunate line requesting the knowledge of the detailed surgical antecedents for diagnosis...
September 2016: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28383357/radiopaque-element-to-evaluate-adequacy-of-debridement-of-bony-lesions
#19
Nicholas Pulos, Alexander Y Shin
A technique for using an x-ray detectable radiopaque element from a surgical sponge to assess the adequacy of debridement of carpal bone cysts, Kienböck disease (lunate avascular necrosis), enchondroma of the digits, and scaphoid nonunions is described. The technique is simple to perform, inexpensive, and presents minimal additional risk to the patient. The technique has been used over the past 16 years and has enabled adequate debridement of these hand and wrist maladies by radiographically demonstrating the adequacy of the debridement to be bone grafted...
April 21, 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28361358/-compression-of-the-median-nerve-by-chronic-palmar-dislocation-of-the-lunate-due-to-carpal-collapse
#20
C K Spies, M Schäfer, C Ahrens, P Hahn, F Unglaub
Carpal tunnel syndrome is among the most frequently diagnosed forms of peripheral nerve compression. Carpal tunnel syndrome due to carpal collapse that had progressed over decades, with a palmarly dislocated lunate, is rare. Hints of past trauma to the wrist going back decades should prompt further radiological examination in case of recurrent median nerve compression. With sufficient preoperative evaluation, the causes can be accurately detected and treated. Therefore, precise and complete history-taking is mandatory...
March 30, 2017: Der Unfallchirurg
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