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Scaphoid bone

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https://www.readbyqxmd.com/read/28428912/biomechanical-evaluation-of-carpal-kinematics-during-simulated-wrist-motion
#1
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
#2
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...
April 19, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28409141/intrathoracic-fracture-dislocation-of-the-humerus-case-report-and-literature-review
#3
Wilson Carlos Sola Junior, Paulo Sérgio Dos Santos
Shoulder fracture-dislocations are uncommon. Those associated with intrathoracic dislocation are very rare conditions, resulting from high-energy trauma; usually, the affected limb is in an abduction position. In Brazil, there is only one report of a teenager with displacement of the epiphysis into the chest cavity; the present is the first adult patient report of intrathoracic dislocation of the humerus. The authors present the case of a patient female, aged 56 years, who was hit by motorcycle and thrown approximately 5 meters away...
March 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28401362/carpal-scaphoid-non-union-treatment-a-retrospective-trial-comparing-simple-retrograde-percutaneous-screw-fixation-versus-percutaneous-screw-fixation-plus-pulsed-electromagnetic-fields-physiostim-%C3%A2
#4
Alexis Pereira, Juan José Hidalgo Díaz, Maurise Saur, Santiago Salazar Botero, Sybille Facca, Philippe Liverneaux
BACKGROUND: The purpose of this retrospective comparative study was to assess whether a complementary treatment by pulsed electromagnetic field could increase the bone-healing rate of scaphoid non-union without SNAC (scaphoid non-union advanced collapse) treated by retrograde percutaneous screw fixation. CASE DESCRIPTION: Eighteen patients with scaphoid non-union were included in this retrospective study. The group 1 was made of nine cases (seven stage IIA and two stage IIB) of scaphoid non-union treated by retrograde percutaneous screw fixation and pulsed electromagnetic fields (Physiostim(®))...
April 11, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28383357/radiopaque-element-to-evaluate-adequacy-of-debridement-of-bony-lesions
#5
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 5, 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28365801/a-modified-matti-russe-technique-of-grafting-scaphoid-non-unions
#6
Moritz Dustmann, Ralf Bajinski, Alexander Tripp, Joachim Gülke, Nikolaus Wachter
INTRODUCTION: In treatment of scaphoid non-union bone healing requires beside vital tissue and stability, enduring compression and a good interface between the graft and scaphoid fragments. While fixation techniques show a good primary stability, they reduce sintering and thus compression of fragments in the long term. Therefore, a modified technique optimising the cancellous interface between graft and scaphoid but still providing enough stability without fixating implants should be evaluated...
April 1, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28344523/scaphoid-nonunion-with-poor-prognostic-factors-the-role-of-the-free-medial-femoral-condyle-vascularized-bone-graft
#7
Tahseen Chaudhry, Lauren Uppal, Dominic Power, Michael Craigen, Simon Tan
Background: To report on the results of free medial femoral condyle (MFC) vascularized bone graft for scaphoid nonunions with 1 or more poor prognostic factors. Methods: We have used the free MFC vascularized bone graft for scaphoid nonunions that have 1 or more factors associated with a poor prognosis. These were, a delay in presentation of over 5 years, a proximal pole nonunion, the presence of avascular necrosis (AVN), or previous nonunion surgery. We used this technique on 20 patients over a 4.5-year period...
March 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28344522/vascularized-bone-grafting-in-scaphoid-nonunion-a-review-of-patient-centered-outcomes
#8
REVIEW
Ram K Alluri, Christine Yin, Matthew L Iorio, Hyuma Leland, Jason Wong, Ketan Patel
Background: The radiographic and clinical outcomes following vascularized bone grafting (VBG) for scaphoid nonunion have previously been reported in the literature; however, few studies report on patient-derived outcomes. The purpose of this study was to determine the effect of VBG for scaphoid nonunion on patient-derived outcomes. Methods: The MEDLINE and PubMed databases were queried for the use of VBG in scaphoid nonunion. We included studies that reported on patient-derived outcomes. We excluded studies with less than 10 patients or less than 6 months of follow-up...
March 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28340662/vascularized-small-bone-transfers-for-fracture-nonunion-and-bony-defects
#9
REVIEW
Ai Dong Deng, Marco Innocenti, Rohit Arora, Markus Gabl, Jin Bo Tang
Vascularized small-bone grafting is an efficient and often necessary surgical approach for nonunion or necrosis of several bones in particular sites of the body, including scaphoid, lunate, distal ulna, and clavicle. The medial femoral condyle is an excellent graft source that can be used in treating scaphoid, ulna, clavicle, or lower-extremity bone defects, including nonunion. Vascularized bone grafting to the small bones, particularly involving reconstruction of damaged cartilage surfaces, should enhance subchondral vascular supply and help prevent cartilage regeneration...
April 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28273677/-first-results-with-a-resorbable-mgyrezr-compression-screw-in-unstable-scaphoid-fractures-show-extensive-bone-cysts
#10
Reinhard Meier, Martin Panzica
Osteosynthesis with headless compression screws is an established treatment option for unstable scaphoid fractures. Common implants are made of titanium alloy or steel and usually remain in place. Due to implant density and ferromagnetic properties, artefacts are common in postoperative imaging procedures, e.g. MRI. Now resorbable implants made of magnesium alloy (MgYREZr) have become available. They have biomechanical properties equivalent to human bone and may be used as an alternative to the nonresorbable screw systems...
February 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28259113/surgeon-based-3d-printing-for-microvascular-bone-flaps
#11
Erin M Taylor, Matthew L Iorio
Background Three-dimensional (3D) printing has developed as a revolutionary technology with the capacity to design accurate physical models in preoperative planning. We present our experience in surgeon-based design of 3D models, using home 3D software and printing technology for use as an adjunct in vascularized bone transfer. Methods Home 3D printing techniques were used in the design and execution of vascularized bone flap transfers to the upper extremity. Open source imaging software was used to convert preoperative computed tomography scans and create 3D models...
March 4, 2017: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/28254313/common-treatments-and-procedures-used-for-fractures-of-the-distal-radius-and-scaphoid-a-review
#12
REVIEW
Basel A Khader, Mark R Towler
The distal radius and the scaphoid are the most commonly injured carpal bones among both active adults and the osteoporotic elderly. The purpose of surgical treatment is to restore form and function to the wrist. Depending on the nature of the fracture, either topical procedures or invasive surgery can be applied. This article critiques the treatments currently used for fixation of wrist fractures in order to drive the development of new materials to improve patient outcomes.
May 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28243717/clinical-outcome-after-alternative-treatment-of-scaphoid-fractures-and-nonunions
#13
A L Sander, K Sommer, D Schäf, C Braun, I Marzi, T Pohlemann, J Frank
PURPOSE: Achieving stable fixation of scaphoid fractures and nonunions continues to be a challenge. Compression screw fixation has been the current standard surgical procedure. However, in some cases, bone healing cannot be achieved and requires further revision. Recent series reintroduced volar plating as valid option for stable fixation. The aim of the study was to review clinical outcome of alternative scaphoid treatment. METHODS: From 2011 to 2014, nine patients with scaphoid fracture were treated by Headless Compression Screw (HCS) and seven patients with scaphoid nonunion by HCS or volar mini condylar plate with bone graft...
February 27, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/28169860/a-rare-complete-metacarpal-pseudoepiphysis-in-a-teenager-with-a-scaphoid-fracture
#14
Rachel B Geffen, Ricardo E Colberg
A 13-yr-old adolescent boy presented with wrist pain after falling off a scooter onto his outstretched hand. Radiographs revealed a nondisplaced hairline fracture of the scaphoid bone and an irregular radiolucent line in the proximal metaphysis of the second metacarpal bone, consistent with an anomalous growth plate, or complete pseudoepiphysis. Complete pseudoepiphysis is a rare finding, with only a few cases reported. Learning about the common locations of growth plates and the radiographic differences between normal, injured, and anomalous growth plates can help decrease physician error and improve patient outcomes...
February 6, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28155839/a-capsular-based-vascularized-distal-radius-graft-in-treatment-of-proximal-pole-scaphoid-pseudoarthrosis-case-study
#15
Wojciech Sroga, Rosa Ana Perez Giner
We present a possible option for surgical treatment of proximal pole scaphoid pseudarthrosis. We used a vascularized distal radius bone graft that was pedicled on the dorsal capsule of the wrist joint. The publication consists of a case study, conclusions, indications and contraindications for the surgery.
November 30, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28141515/automatic-quantification-of-radiographic-wrist-joint-space-width-of-patients-with-rheumatoid-arthritis
#16
Yinghe Huo, Koen I Vincken, Desiree van der Heijde, Maria J H De Hair, Floris P Lafeber, Max A Viergever
OBJECTIVE: Wrist joint space narrowing is a main radiographic outcome of rheumatoid arthritis (RA). Yet, automatic radiographic wrist joint space width (JSW) quantification for RA patients has not been widely investigated. The aim of this paper is to present an automatic method to quantify the JSW of three wrist joints that are least affected by bone overlapping and are frequently involved in RA. These joints are located around the scaphoid bone, viz. the multangular-navicular, capitate-navicular-lunate, and radiocarpal joints...
January 26, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28137436/arthroscopic-grafting-of-scaphoid-nonunion%C3%A2-%C3%A2-surgical-technique-and-preliminary-findings-from-23-cases
#17
J-M Cognet, P Louis, X Martinache, F Schernberg
We report our experience with the arthroscopic treatment of 23 cases of scaphoid nonunion. We explain the surgical technique and describe the different steps needed to achieve bone union. We report our initial clinical and radiological results. This was a prospective non-randomized study. Inclusion criteria were a scaphoid nonunion without radiocarpal arthritis, without any time limit and without any selection as to nonunion location. Before the operation, patients underwent an X-Ray and CT scan or MRI. Schernberg's classification was used to evaluate the location of the nonunion...
February 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28125938/vascularized-versus-non-vascularized-bone-grafts-in-the-treatment-of-scaphoid-non-union
#18
Christoph Hirche, Lingyun Xiong, Christian Heffinger, Matthias Münzberg, Sebastian Fischer, Ulrich Kneser, Thomas Kremer
INTRODUCTION: Conventional non-vascularized bone grafts as well as vascularized bone grafts are used to treat scaphoid non-union (SN). Due to limited available studies, the field of application using both grafts for SN still remains controversial. The aim of this study was to evaluate a treatment algorithm for the use of both vascularized versus non-vascularized bone grafts based on clinical outcomes and quality of life (QoL) to improve the level of evidence. MATERIALS AND METHODS: Based on a retrospective cohort study, including 28 patients with vascularized and 45 patients with conventional bone grafts, functional parameters, radiological outcome, Mayo-wrist-score, and QoL by SF-36 were applied to statistically compare the outcome of these two techniques...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28114317/the-scaphoid-safe-zone-a-radiographic-simulation-study-to-prevent-cortical-perforation-arising-from-different-views
#19
Qi Quan, Lei Hong, Biao Chang, Ruoxi Liu, Yun Zhu, Jiang Peng, Qing Zhao, Shibi Lu
PURPOSE: The purpose of this study was to simulate and calculate the probability of iatrogenic perforation of the scaphoid cortical bone when internal fixation appeared to be safe on radiographs. The results will assist surgeons in determining proper screw placement. METHODS: Thirty scaphoids were reconstructed using computed tomography data and image-processing software. Different central axes were determined by the software to simulate the surgical views. The safe zone (SZ) and risk zone (RZ) were identified on the axial projection radiographs by comparing the scaphoid bone stenosis measured by the fluoroscopic radiographs with a three-dimensional reconstruction of the scaphoid stenosis...
2017: PloS One
https://www.readbyqxmd.com/read/28099304/three-dimensional-analysis-of-acute-scaphoid-fracture-displacement-proximal-extension-deformity-of-the-scaphoid
#20
Yonatan Schwarcz, Yael Schwarcz, Eran Peleg, Leo Joskowicz, Ronit Wollstein, Shai Luria
BACKGROUND: Our goal was to analyze the movement of acute scaphoid waist fracture fragments and adjacent bones in a common coordinate system. Our hypothesis was that the distal scaphoid fragment flexes and pronates and the proximal fragment extends. METHODS: Computed tomography (CT) scans of patients diagnosed with an acute scaphoid waist fracture were evaluated using a 3-dimensional (3D) model. The scans of 57 nondisplaced and 23 displaced fractures were compared with a control group of 27 scans showing no pathological involvement of the wrist...
January 18, 2017: Journal of Bone and Joint Surgery. American Volume
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