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Ring fixator

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https://www.readbyqxmd.com/read/28205465/biomechanics-of-internal-fixation-modalities-for-middle-phalangeal-base-fracture-dislocation
#1
Gen-Lin Foo, Amit K Ramruttun, Andre Eujin Cheah, Alphonsus Kin-Sze Chong, Tun-Lin Foo
BACKGROUND: Internal fixation modalities of unstable (>50 percent articular involvement) middle phalangeal volar lip fracture-dislocations include interfragmentary screw and volar buttress plating. This study investigates the mechanical properties (yield strength, ultimate tensile strength, and stiffness) of interfragmentary screw (IS), simple buttress plating (BP) and buttress plating with subchondral screw (BP+S). METHODS: Fifteen cadaveric digits (5 index, 5 middle, and 5 ring) were prepared by excising its skin envelope and flexor tendons while preserving the structures around the proximal interphalangeal joint...
March 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28194508/open-reduction-and-internal-fixation-for-intraarticular-fracture-of-metacarpal-head
#2
Jun-Ku Lee, Yong-Gil Jo, Ji-Woong Kim, Yun Seong Choi, Soo-Hong Han
Intraarticular fracture of the metacarpophalangeal (MP) joint presents complex problems related to the sophisticated functional aspects of the hand. Injury to the metacarpal head may have a severe effect on hand function but few studies have investigated the management of this condition. In this study, we applied open reduction and internal fixation for the displaced fracture of the metacarpal head and report the clinical and radiographic outcomes of our experience. Thirteen patients (12 men, 1 woman; mean age 21 years) were included in this study, and medical records and radiographs were reviewed retrospectively...
February 13, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28192092/peripheral-oculomotor-training-in-individuals-with-healthy-visual-systems-effects-of-training-and-training-transfer
#3
Dylan Rose, Peter Bex
Individuals with pathological or simulated central visual field loss can be trained to use a preferred retinal locus (PRL) as a substitute for their non-functioning fovea. The functional benefits of a stable PRL are well documented, but little is known about oculomotor adaptations during PRL acquisition or transfer of training to another location in response to real or simulated disease progression. In this study, eight normally-sighted observers were trained to use a pseudo-PRL (pPRL) at one of two locations by guiding an eccentrically placed, gaze-contingent ring over a fixation target...
February 9, 2017: Vision Research
https://www.readbyqxmd.com/read/28188548/a-prospective-observational-study-of-56-patients-treated-with-ring-fixator-after-a-complex-tibial-fracture
#4
Rasmus Elsoe, Søren Kold, Peter Larsen, Juozas Petruskevicius
The objective of this prospective study was to evaluate the patient-reported outcomes for patients with complex tibial fractures treated with a ring fixator. The secondary aim was to analyse the variables affecting patient-reported outcomes and time to union. Fifty-six patients participated in the study. The mean age at the time of fracture was 56.5 years (range 30-86). All fractures united during the study period. The ring fixator was removed at an average of 25.3 weeks (range 9-53). During treatment, the function and QOL increased with time...
February 10, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28187157/distinct-eye-movement-patterns-enhance-dynamic-visual-acuity
#5
Dimitrios J Palidis, Pearson A Wyder-Hodge, Jolande Fooken, Miriam Spering
Dynamic visual acuity (DVA) is the ability to resolve fine spatial detail in dynamic objects during head fixation, or in static objects during head or body rotation. This ability is important for many activities such as ball sports, and a close relation has been shown between DVA and sports expertise. DVA tasks involve eye movements, yet, it is unclear which aspects of eye movements contribute to successful performance. Here we examined the relation between DVA and the kinematics of smooth pursuit and saccadic eye movements in a cohort of 23 varsity baseball players...
2017: PloS One
https://www.readbyqxmd.com/read/28160019/reconstructive-surgery-of-the-amputated-ring-finger
#6
Ricardo Monreal
PURPOSE: Loss of a fourth digit below the level of the proximal phalanx results in a weakened grip, loss of skilled movements, and the amputation stump is repeatedly traumatized. Transposition of an adjacent fifth digital ray can improve hand function and cosmetic appearance by closing the gap created by the missing digit. Digital ray amputation is not a commonly performed procedure. However, when performed correctly it can dramatically improve hand function and cosmesis. The aim of this study was to evaluate the functional and aesthetic results of the fifth ray radial translation and intercarpal arthrodesis in mutilating ring finger injuries...
February 3, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28150224/isolated-acetabular-revision-with-femoral-stem-retention-after-bipolar-hip-arthroplasty
#7
Nobuhiro Kaku, Tomonori Tabata, Hiroaki Tagomori, Hiroshi Tsumura
INTRODUCTION: In bipolar hemiarthroplasty, migration of the outer cup component into the acetabular cup, with evidence of severe osteolysis in the acetabulum, commonly occurs without loosening of the femoral component. The merits of retaining the stable femoral component in these cases have been debated. Our study aimed to determine whether revision of the acetabular component in isolation could be successfully performed. MATERIALS AND METHODS: The data of 54 patients (61 hips), 44 women, and 10 men, aged 67...
February 1, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28116276/is-early-weight-bearing-allowed-in-surgically-treated-talar-neck-fractures
#8
P H S Kalmet, S Sanduleanu, Y Y V Horn, M Poeze, P R G Brink
INTRODUCTION: Non-or partial weight bearing is frequently the standard treatment after peri-articular lower extremity fractures. Displaced talar neck fractures are severe injuries compromising vascularity of the corpus and consequently are at risk for non-union and avascular necrosis, the main reason to restrict weight bearing for up to three months according to most literature. CASE PRESENTATION: We report a case of a 31-year old male with a high impact car accident...
July 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28115984/pelvic-trauma-wses-classification-and-guidelines
#9
REVIEW
Federico Coccolini, Philip F Stahel, Giulia Montori, Walter Biffl, Tal M Horer, Fausto Catena, Yoram Kluger, Ernest E Moore, Andrew B Peitzman, Rao Ivatury, Raul Coimbra, Gustavo Pereira Fraga, Bruno Pereira, Sandro Rizoli, Andrew Kirkpatrick, Ari Leppaniemi, Roberto Manfredi, Stefano Magnone, Osvaldo Chiara, Leonardo Solaini, Marco Ceresoli, Niccolò Allievi, Catherine Arvieux, George Velmahos, Zsolt Balogh, Noel Naidoo, Dieter Weber, Fikri Abu-Zidan, Massimo Sartelli, Luca Ansaloni
Complex pelvic injuries are among the most dangerous and deadly trauma related lesions. Different classification systems exist, some are based on the mechanism of injury, some on anatomic patterns and some are focusing on the resulting instability requiring operative fixation. The optimal treatment strategy, however, should keep into consideration the hemodynamic status, the anatomic impairment of pelvic ring function and the associated injuries. The management of pelvic trauma patients aims definitively to restore the homeostasis and the normal physiopathology associated to the mechanical stability of the pelvic ring...
2017: World Journal of Emergency Surgery: WJES
https://www.readbyqxmd.com/read/28110637/surgical-reconstruction-of-traumatic-ciliary-body-dialysis-a-case-report
#10
Adam Kluś, Mariusz Kosatka, Milena Kozera, Marek Rękas
BACKGROUND: A cyclodialysis cleft is a gap resulting from disruption of the longitudinal fibers constituting the ciliary body attachment to the scleral spur. The cyclodialysis cleft can be of traumatic or iatrogenic origin, and it may occur during intraocular surgery or as a result of a glaucoma operation. In this report we present a surgical technique to treat cyclodialysis: cyclopexy combined with phacoemulsification subluxation lens, transscleral suturing of Cionni ring, and intraocular lens implantation with iris cerclage suture...
January 23, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28106890/assessment-of-a-new-hydrophilic-acrylic-supplementary-iol-for-sulcus-fixation-in-pseudophakic-cadaver-eyes
#11
N Reiter, L Werner, J Guan, J Li, K T Tsaousis, N Mamalis, S Srinivasan
PurposeManagement of refractive errors after cataract surgery includes spectacles or contact lens, secondary laser vision correction, intraocular lens (IOL) exchange, or piggyback lens implantation. We evaluated for the first time a single-piece hydrophilic acrylic IOL designed for supplementary sulcus fixation in postmortem pseudophakic human eyes.MethodsPseudophakic human cadaver eyes were imaged by anterior segment optical coherence tomography (AS-OCT) to assess position of the primary IOL. Eyes were prepared as per the Miyake-Apple technique...
January 20, 2017: Eye
https://www.readbyqxmd.com/read/28095766/clamping-of-fine-kirschner-wires-in-external-fixators
#12
Ahmad R Zamani, S Olutunde Oyadiji
In Ilizarov circular (ring) external fixators, fine Kirschner wires are used to fix the bone to the fixator. Clamping of the wires to the rings with different bolt torques has been studied. However, the relation between the bolt torque and the fixation load applied to the wire was not investigated. In this work, finite element method is used to address this problem. Here, a fully three-dimensional model of the wire fixation assembly was built, with geometric details like threads on the bolt to produce a realistic simulation of the clamping of the wire...
November 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28079731/midterm-radiographic-and-functional-outcomes-of-the-anterior-internal-pelvic-fixator-infix
#13
Rahul Vaidya, Adam Jonathan Martin, Matthew Roth, Frederick Tonnos, Bryant Oliphant, Jon Carlson
OBJECTIVE: To describe our experience using the anterior internal pelvic fixator (INIFX) for treating pelvic ring injuries. DESIGN: Case Series SETTING:: Level 1 Trauma Center PATIENTS:: Eighty-three patients with pelvic ring injuries treated with INFIX. Follow up avg. 35 months (range 12-80.33) INTERVENTION:: Surgical treatment of pelvic ring injuries included reduction, appropriate posterior fixation, and INFIX placement. OUTCOME MEASUREMENTS: Reduction using the pelvic deformity index (PDI) and pubic symphysis(PS) widening, Majeed functional scores, complications; infection, implant failure, heterotopic ossification (HO), nerve injury, and pain...
January 5, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28078361/infix-versus-plating-for-pelvic-fractures-with-disruption-of-the-symphysis-pubis
#14
Rahul Vaidya, Adam Jonathan Martin, Matthew Roth, Kerellos Nasr, Petra Gheraibeh, Frederick Tonnos
PURPOSE: The purpose of this study is to compare INFIX to plating in the treatment of unstable pelvic ring injuries with disruption of the symphysis. METHODS: Twenty-four patients treated with INFIX were compared to 28 patients fixed by plating. All patients had anterior and posterior fixation. Injuries were classified using the Young and Burgess and AO/OTA classification systems. Reductions of the pelvic ring were assessed using the pelvic deformity index (PDI) and symphyseal widening...
January 11, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28058661/an-old-mismanaged-lisfranc-injury-treated-by-gradual-deformity-correction-followed-by-the-second-stage-internal-fixation
#15
Mehraj D Tantray, Khurshid Kangoo, Asif Nazir, Muzamil Baba, Raja Rameez, Syed Tabish, Syed Shahnawaz
The Lisfranc fracture-dislocation of the foot is uncommon and diagnosis is often missed. The Lisfranc joint involves the articulation between medial cuneiform and base of the second metatarsal and is considered a keystone to structural integrity to the midfoot. The articulation has a stabilization effect on longitudinal and transverse arches of the foot. A neglected or untreated injury to the Lisfranc joint can lead to secondary arthritis and significant morbidity and disability. We present a case of a neglected Lisfranc fracture-dislocation in a 28-year-old female patient who presented 3 months after injury...
January 5, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28057632/are-two-retrograde-3-5-mm-screws-superior-to-one-7-3-mm-screw-for-anterior-pelvic-ring-fixation-in-bones-with-low-bone-mineral-density
#16
Y P Acklin, I Zderic, S Grechenig, R G Richards, P Schmitz, B Gueorguiev
OBJECTIVES: Osteosynthesis of anterior pubic ramus fractures using one large-diameter screw can be challenging in terms of both surgical procedure and fixation stability. Small-fragment screws have the advantage of following the pelvic cortex and being more flexible.The aim of the present study was to biomechanically compare retrograde intramedullary fixation of the superior pubic ramus using either one large- or two small-diameter screws. MATERIALS AND METHODS: A total of 12 human cadaveric hemipelvises were analysed in a matched pair study design...
January 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28053385/outcome-of-distraction-osteogenesis-by-ring-fixator-in-infected-large-bone-defects-of-tibia
#17
Rajesh Rohilla, Karan Siwach, Ashish Devgan, Roop Singh, Jitendra Wadhwani, Naseem Ahmed
BACKGROUND: Salvage of large, infected bone defects in tibia poses a formidable problem. The present prospective study aimed to evaluate radiologic and functional outcome of ring fixator in infected, large (≥6 cm) bone defects of tibia treated with distraction osteogenesis. MATERIALS AND METHODS: The study included 35 patients (30 males and 5 females) who had minimum of 6 cm gap after radical resection of necrotic bone and presence or history of active infection...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28030509/impact-of-early-operative-pelvic-fixation-on-long-term-self-reported-outcome-following-severe-pelvic-fracture
#18
John P Sharpe, Louis J Magnotti, Wade C Gobbell, Xin Huang, Edward A Perez, Timothy C Fabian, Martin A Croce
BACKGROUND: Traumatic disruption of the pelvic ring is a significant cause of life-threatening hemorrhage. For those patients who survive the initial injury, these fractures are associated with long periods of immobilization and intense rehabilitation. There is little published information available regarding long-term functional outcomes in these patients. This study evaluated the impact of severe pelvic fractures on those long-term outcomes. METHODS: All patients with severe pelvic fractures over an 18-year period were identified...
December 23, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28017873/open-reduction-internal-fixation-versus-percutaneous-iliosacral-screw-fixation-for-unstable-posterior-pelvic-ring-disruptions
#19
Mohamed Mansour Elzohairy, Adel Mohamed Salama
BACKGROUND: Surgical stabilization of posterior pelvic ring fractures can be achieved by either open or closed methods. They all provide a comparable biomechanical stability. The aim of the present study is to comparethe clinical results of both techniques for treating posterior pelvic ring injuries. MATERIAL AND METHODS: Seventy patientsoperated for unstable posterior pelvic ring disruptions wereretrospectively reviewed. We compared 35 patients treated by open reduction internal fixation (ORIFgroup)versus35 patients stabilized by using closed reduction and percutaneous iliosacral screw fixation (CRIF group) under fluoroscopic guidance...
December 22, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28012552/smoking-cessation-advice-in-limb-reconstruction-an-opportunity-not-to-be-missed
#20
J Ring, A Shoaib, R Shariff
The adverse health effects of smoking are well known, including its effects on the musculoskeletal system. Limb reconstruction using external fixators is a high intensity process with high levels of patient contact time, complications and cost. The aim of this study was to examine smoking patterns in this group and in particular to assess trends in smoking cession. Data was collected from 41 patients all undergoing treatment using circular frame external fixation, for a variety of pathologies, most commonly acute tibial trauma...
February 2017: Injury
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