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Scaphoid bone

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https://www.readbyqxmd.com/read/29310416/medium-term-outcome-of-closed-radial-wedge-osteotomy-of-the-distal-radius-for-preiser-disease-with-concomitant-kienb%C3%A3-ck-disease-two-case-reports-and-a-literature-review
#1
Yuji Tomori, Takuya Sawaizumi, Nanno Mitsuhiko, Shinro Takai
RATIONALE: Idiopathic avascular necrosis of the scaphoid or lunate bone are known as Preiser disease and Kienböck disease, respectively. Although there are reports of avascular necrosis involving more than one carpal bone, concurrent idiopathic avascular necrosis of the scaphoid and lunate bones is rare, with only five cases reported in the English literature (including the two herein). Although the optimum treatment for Preiser disease with concomitant Kienböck disease has not been established, our cases underwent closed radial wedge osteotomy based on the evidence of satisfactory outcomes for treating Kienböck disease...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29305609/does-wrist-laxity-influence-3d-carpal-bone-motion
#2
Gordie Best, Michelle Zec, David Pichora, Robin Kamal, Michael J Rainbow
Previous 2D studies have shown that there is a spectrum of carpal mechanics that varies between row-type motion and column-type motion as a function of wrist laxity. More recent 3D studies have suggested instead that carpal bone motion is consistent across individuals. The purpose of this study was to use 3D methods to determine whether carpal kinematics differ between stiffer wrists and wrists with higher laxity. Wrist laxity was quantified using a goniometer in 10 subjects by measuring passive wrist flexion-extension range of motion...
January 5, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29301797/management-of-a-15-year-old-scaphoid-non-union
#3
Kai Yuen Wong, Olivia Sharp, Phillip Johnston
Scaphoid non-union affects wrist joint function and is often associated with a predictable pattern of degenerative change. A 30-year-old man presented with a symptomatic 15-year-old right scaphoid fracture with secondary scaphoid non-union advanced collapse of his right wrist. There was no evidence of avascular necrosis. The initial injury was from a fall onto his outstretched hand. We performed a right scaphoid open reduction, internal fixation and iliac crest bone graft. One year after the operation, the patient had good wrist function and grip strength...
January 4, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29258960/corticocancellous-bone-graft-vs-cancellous-bone-graft-for-the-management-of-unstable-scaphoid-nonunion
#4
J K Kim, J O Yoon, H Baek
INTRODUCTION: This study was undertaken to determine whether corticocancellous bone grafting and cancellous bone grafting differ in terms of bone union rate, restoration of scaphoid anatomy, and wrist function when unstable scaphoid nonunions are concomitantly treated by screw fixation. MATERIALS AND METHODS: This is retrospective cohort study. In Group A (17 patients), unstable scaphoid nonunion was treated with corticocancellous graft harvested from the iliac crest and headless compression screw using volar approach...
December 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29241360/interfragmentary-compression-forces-vary-based-on-scaphoid-bone-screw-type-and-fracture-location
#5
Samik Patel, Nathan Tiedeken, Lars Qvick, Richard E Debski, Robert Kaufmann, John R Fowler
BACKGROUND: The objective of this study was to determine the interfragmentary compression forces generated in a foam model as a function of headless compression screw type (fully threaded and central threadless) and fracture location. METHODS: Eighty-eight polyurethane foam models were fixed across a simulated transverse fracture with either a fully threaded screw or a central threadless screw. The location of the transverse fracture varied along the length of the foam model in 2 mm increments for 11 fracture locations...
December 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29234645/bone-graft-in-the-treatment-of-nonunion-of-the-scaphoid-with-necrosis-of-the-proximal-pole-a-literature-review
#6
Antônio Lourenço Severo, Marcelo Barreto Lemos, Osvandré Luiz Canfield Lech, Danilo Barreto Filho, Daniel Paulo Strack, Larissa Knapp Candido
Scaphoid fractures are the most common fractures of the carpal bones, corresponding to 60%. Of these, 10% progress to nonunion; moreover, 3% can present necrosis of the proximal pole. There are various methods of treatment using vascularized and non-vascularized bone grafts. To evaluate and compare the rate of scaphoid consolidation with necrosis of the proximal pole using different surgical techniques. The authors conducted a review of the literature using the following databases: PubMed and BIREME/LILACS, where 13 case series were selected (ten with use of vascularized bone grafts and three of non-vascularized bone grafts), according to inclusion and exclusion criteria...
November 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/29169719/fracture-gap-reduction-with-variable-pitch-headless-screws
#7
Austin J Roebke, Logan J Roebke, Kanu S Goyal
PURPOSE: Fully threaded, variable-pitch, headless screws are used in many settings in surgery and have been extensively studied in this context, especially in regard to scaphoid fractures. However, it is not well understood how screw parameters such as diameter, length, and pitch variation, as well as technique parameters such as depth of drilling, affect gap closure. METHODS: Acutrak 2 fully threaded variable-pitch headless screws of various diameters (Standard, Mini, and Micro) and lengths (16-28 mm) were inserted into polyurethane blocks of "normal" and "osteoporotic" bone model densities using a custom jig...
November 21, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29165015/lessons-learned-from-volar-plate-fixation-of-scaphoid-fracture-nonunions
#8
Seth D Dodds, John B Williams, Max Seiter, Clark Chen
Treating scaphoid nonunions presents difficulties particularly when there is bone loss, significant humpback deformity or avascular necrosis. We describe a new type of fixation with a volar scaphoid plate that adds to the methods of internal fixation that are available for the treatment of recalcitrant scaphoid nonunions. We will also discuss 'lessons learned' from a cases series. The case series includes 20 consecutive patients treated with volar buttress plating and a pedicled vascularized bone graft from the ipsilateral volar distal radius...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29165014/fixation-of-proximal-pole-scaphoid-nonunion-with-non-vascularized-cancellous-autograft
#9
Timothy J Luchetti, Allison J Rao, John J Fernandez, Mark S Cohen, Robert W Wysocki
We present 20 patients with established proximal pole scaphoid nonunions treated with curettage and cancellous autograft from the distal radius and screw fixation. Fractures with significant proximal pole fragmentation were excluded. Patients were treated at a mean of 26 weeks after injury (range 12-72). Union occurred in 18 of 20 patients (90%) based on computed tomographic imaging. The two nonunions that did not heal were treated with repeat curettage and debridement and iliac crest bone grafting without revision of fixation...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29143872/concomitant-hook-of-hamate-fractures-in-patients-with-scaphoid-fracture-more-common-than-you-might-think
#10
Ramin Mandegaran, Sam Gidwani, Ali Zavareh
OBJECTIVE: The scaphoid is the most commonly fractured carpal bone. The presence of a concomitant hook of hamate fracture is of particular relevance given that it is often occult on routine wrist/scaphoid radiographs and that hook of hamate fractures are prone to symptomatic non-union, resulting in chronic ulnar wrist pain. Prompt diagnosis and immobilisation/fixation may minimise such complications. Our study is aimed at assessing the frequency of concomitant hook of hamate fractures in patients with scaphoid fractures...
November 16, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29132789/scaphoid-fracture-fixation-in-a-nonunion-model-a-biomechanical-study-comparing-3-types-of-fixation
#11
Avanthi Mandaleson, Stephen K Tham, Craig Lewis, David C Ackland, Eugene T Ek
PURPOSE: Union of a scaphoid fracture after fixation is influenced by various factors, one of which is fracture stability. This study aims to compare the biomechanical stability of 3 different types of scaphoid fracture fixation in a scaphoid nonunion model. METHODS: Thirty cadaveric scaphoid specimens were assigned to one of 3 different fixation groups: (1) single 3.0-mm compression screw, (2) two 2.2-mm screws, and (3) scaphoid plate. A 3-mm volar wedge osteotomy was created at the scaphoid waist to simulate a nonunion model...
November 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29122424/scaphoid-healing-necessary-for-unrestricted-activity-a-biomechanical-cadaver-model
#12
Michael S Guss, Joshua T Mitgang, Anthony Sapienza
PURPOSE: To determine if scaphoid fractures with bridging bone of 50% of their width treated with a centrally placed screw will restore biomechanical integrity equivalent to that of the intact scaphoid. METHODS: Twenty-four fresh cadaver scaphoids were used. Six were left intact to serve as the control group. Six were osteotomized 50% of their width and made up the osteotomy without screw group. Six were included in the 50% osteotomy plus compression screw group...
November 7, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29105591/treatment-of-the-scaphoid-humpback-deformity-is-correction-of-the-dorsal-intercalated-segment-instability-deformity-critical
#13
Christophe L Mathoulin, Margareta Arianni
Treatment of scaphoid fractures has been focused mainly on achieving union, with less attention to restoring normal scaphoid shape and orientation. Malalignment of one carpal bone will disrupt the kinetics of the entire wrist. The dorsal intercalated segment instability deformity associated with scaphoid waist nonunion is a nondissociative form of carpal instability. It has to be reduced in the treatment of scaphoid waist nonunions to avoid kinetic problems that will lead to arthritic changes. Computerized tomography scanning has become indispensable to visualize the humpback deformity clearly...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29105586/radial-styloidectomy-for-scaphoid-nonunion-advanced-collapse-relevance-of-nonunion-location
#14
Emil S Vutescu, Rishabh Jethanandani, Darryl B Sneag, Scott W Wolfe, Steve K Lee
Radial styloidectomy along with scaphoid nonunion reconstructive surgery is considered an acceptable surgical treatment for stage 1 scaphoid nonunion advanced collapse. The extent of radioscaphoid joint wear that defines scaphoid nonunion advanced collapse stage 1 is unclear. An appropriate radial styloidectomy is limited to 6 mm styloid removal to prevent carpal instability. The aim of this study was to determine whether nonunion fracture location can be a guiding factor in determining whether the scaphoid bone can be retained with scaphoid nonunion reconstructive surgery and radial styloidectomy...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29098903/scaphoid-instability-caused-by-a-giant-cell-tumour-of-the-tendon-sheath-a-case-report
#15
Yanjun Wang, Xiaoxiao Zhu, Genwang Pei, Xianshang Zeng, Deng Chen, Yonggang Zuo, Weiguang Yu, Zhe Ge, Xinchao Zhang
Giant-cell tumour of the tendon sheath (GCTTS) is a soft tissue tumour that may invade bone, causing an intrinsic osseous lesion or instability on radiographs. A case with scaphoid instability caused by a histologically-confirmed neighbouring GCTTS has rarely been described in the literature. No definite and radical method is available for the treatment of GCTTS. This report describes an unusual case of a 22-year-old woman who previously experienced a GCTTS in her right elbow, which was removed 10 years earlier...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/29078719/bone-grafting-for-scaphoid-nonunions-is-free-vascularized-bone-grafting-superior-for-scaphoid-nonunion
#16
William R Aibinder, Eric R Wagner, Allen T Bishop, Alexander Y Shin
BACKGROUND: Nonvascularized bone grafting (NVBG) and vascularized bone grafts (VBGs) have been used to treat scaphoid nonunions. A comparison of a single institution' s experience using structural iliac crest bone graft (ICBG), 1,2-intercompartmental supraretinacular artery (1,2-ICSRA), and medial femoral condyle (MFC) grafts to treat scaphoid nonunions was undertaken. METHODS: Thirty-one patients underwent ICBG, 33 patients underwent 1,2-ICSRA, and 45 patients underwent MFC grafting...
October 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29078712/management-modalities-and-outcomes-following-acute-scaphoid-fractures-in-children-a-quantitative-review-and-meta-analysis
#17
Ashkaun Shaterian, Pauline Joy F Santos, Christine J Lee, Gregory R D Evans, Amber Leis
BACKGROUND: Early evaluation and appropriate management of pediatric scaphoid fractures are necessary to avoid complications. To date, current management of pediatric fractures varies among providers. The objective of this study was to compare clinical outcomes following different treatment modalities. METHODS: A PubMed literature search identified studies involving acute scaphoid fractures in children. Studies were evaluated for treatment provided and their respective effects on union rate, wrist range of motion, and wrist pain...
October 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29033290/nonvascularized-cartilage-grafts-versus-vascularized-cartilage-flaps-comparison-of-cartilage-quality-6%C3%A2-months-after-transfer-and-isolated-from-surrounding%C3%A2-bone-ingrowth
#18
James P Higgins, Farzad Borumandi, Heinz K Bürger, Mehmet Emre Benlidayı, Anna Vasilyeva, Leman Sencar, Sait Polat, Alexander J Gaggl
PURPOSE: Subchondral perfusion of osteochondral grafts has been shown to be important in preventing long-term cartilage degeneration. In carpal reconstruction, subchondral perfusion from the graft bed is limited. This study's purpose was to compare the histological characteristics of cartilage in osteochondral grafts supported by synovial imbibition alone to cartilage of vascularized osteochondral flaps that have both synovial and vascular pedicle perfusion. METHODS: Two adjacent osteochondral segments were harvested on the medial femoral trochlea in domestic 6- to 8-month-old pigs...
October 12, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28991580/scaphoid-union-the-role-of-wrist-arthroscopy
#19
REVIEW
Jeff Ecker
There are times when clinical examinations, radiographs, and computed tomography scans do not provide sufficient information to know whether a scaphoid fracture or scaphoid bone graft has united, partially united, or not united. When this problem arises, arthroscopic examination of the scaphoid fracture or scaphoid bone graft provides additional information to solve the problem and plan further management in an evidence-based manner. The indications for the use of arthroscopy and surgical technique are described...
November 2017: Hand Clinics
https://www.readbyqxmd.com/read/28988679/cumulative-incidence-of-carpal-instability-12-24-months-after-fall-onto-outstretched-hand
#20
Lisa O'Brien, Luke Robinson, Eugene Lim, Hayley O'Sullivan, Helen Kavnoudias
STUDY DESIGN: Descriptive Epidemiological Study. INTRODUCTION: Ligament tears between carpal bones are easily missed on initial presentation, but can have potentially debilitating effects on the patient if they progress to an instability. They are usually the result of a fall onto an outstretched hand with the wrist in hyperextension. Current incidence of carpal instability after these falls is unknown. PURPOSE OF THE STUDY: Using established clinical and radiological measures, we sought to establish the cumulative incidence of carpal instability in people who have fallen onto an outstretched hand in the second year after injury...
October 5, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
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