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https://www.readbyqxmd.com/read/27909130/the-use-of-ultra-low-dose-ct-scans-for-the-evaluation-of-limb-fractures-is-the-reduced-effective-dose-using-ct-in-orthopaedic-injury-reduction-protocol-effective
#1
S R Konda, A M Goch, P Leucht, A Christiano, S Gyftopoulos, G Yoeli, K A Egol
AIMS: To evaluate whether an ultra-low-dose CT protocol can diagnose selected limb fractures as well as conventional CT (C-CT). PATIENTS AND METHODS: We prospectively studied 40 consecutive patients with a limb fracture in whom a CT scan was indicated. These were scanned using an ultra-low-dose CT Reduced Effective Dose Using Computed Tomography In Orthopaedic Injury (REDUCTION) protocol. Studies from 16 selected cases were compared with 16 C-CT scans matched for age, gender and type of fracture...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27891668/systematic-mapping-of-the-subchondral-bone-3d-microarchitecture-in-the-human-tibial-plateau-variations-with-joint-alignment
#2
Bryant C Roberts, Dominic Thewlis, Lucian B Solomon, Graham Mercer, Karen J Reynolds, Egon Perilli
Tibial subchondral bone plays an important role in knee osteoarthritis (OA). Microarchitectural characterization of subchondral bone plate (SBP), underlying subchondral trabecular bone (STB) and relationships between these compartments, however, is limited. The aim of this study was to characterize the spatial distribution of SBP thickness, SBP porosity and STB microarchitecture, and relationships among them, in OA tibiae of varying joint alignment. Twenty-five tibial plateaus from end-stage knee-OA patients, with varus (n = 17) or non-varus (n = 8) alignment were micro-CT scanned (17 μm/voxel)...
November 7, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27859535/marker-based-technique-for-visualizing-radiolucent-implant-components-in-radiographic-imaging
#3
Kimberley Lam-Tin-Cheung, Xunhua Yuan, Hristo N Nikolov, Brent A Lanting, Douglas D Naudie, Matthew G Teeter
Radiography is the predominant imaging modality used for the in-vivo analysis of orthopaedic implants. A major disadvantage of radiography is that the articulating joint components that are composed of radiolucent polyethylene cannot be directly visualized. Current strategies attempt to circumvent this limitation by estimating component positions and simplifying the joint system, however, these approaches lead to a number of associated errors. Thus, this study provides a method to enable the visualization of the polyethylene component of total knee replacements in radiographic images...
November 9, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27844117/are-advanced-three-dimensional-imaging-studies-always-needed-to-measure-the-coronal-knee-alignment-of-the-lower-extremity
#4
Jean Yves Lazennec, Quentin Chometon, Dominique Folinais, Christopher B Robbins, Aidin Eslam Pour
BACKGROUND: Coronal malalignment of the lower extremity is closely related to the onset and progression of osteoarthritis. Restoring satisfactory alignment after tibial osteotomy improves the long-term success of this conservative surgery. The purpose of our study was to determine (1) if there is a difference between two-dimensional (2D) and 3D measurements of the hip-knee-ankle (HKA) angle between the mechanical axes of the femur and the tibia, (2) which parameter most affects 2D-3D HKA measurement, and (3) the percentage of patients who are at risk of error in HKA measurement...
November 14, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27822004/the-morphometric-anatomy-of-the-delto-fulcral-triangle-a-3d-ct-based-reconstruction-study
#5
N Naidoo, L Lazarus, K S Satyapal, L De Wilde, A Van Tongel
This study introduced the new delto-fulcral triangle (DFT), the first anatomical model of its kind. As seen from the orthopaedician's supraspinatus-outlet view, the antero-superior point of the coracoid process along with the lateral- and posterior-most acromial landmarks form the boundaries of the DFT. Since these osseous scapular landmarks accounted for both dynamic and static stabilisers of the glenohumeral joint, knowledge of the anatomical features of the DFT may prove beneficial to the orthopaedic surgeon...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/27816389/biomechanical-optimization-of-the-angle-and-position-for-surgical-implantation-of-a-straight-short-stem-hip-implant
#6
Gillian E Cook, Saeid Samiezadeh, Zachary Morison, Mina S R Aziz, Habiba Bougherara, Radovan Zdero, Emil H Schemitsch
Conservative hip implants preserve healthy bone for revision surgeries and improve physiological loading; however, they have little supporting biomechanical data with respect to their 3D orientation during implantation. This study endeavored to determine the optimal 3D orientation of a straight short stem hip implant within the proximal femur that would yield a stress distribution most similar to an intact femur. Synthetic femurs were implanted with a stem in one of seven maximum angles or positions and axially loaded, with resultant strain values used to validate a finite element model...
November 2, 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27686039/anti-infective-efficacy-cytocompatibility-and-biocompatibility-of-a-3d-printed-osteoconductive-composite-scaffold-functionalized-with-quaternized-chitosan
#7
Ying Yang, Shengbing Yang, Yugang Wang, Zhifeng Yu, Haiyong Ao, Hongbo Zhang, Ling Qin, Olivier Guillaume, David Eglin, R Geoff Richards, Tingting Tang
: Contaminated or infected bone defects remain serious challenges in clinical trauma and orthopaedics, and a bone substitute with both osteoconductivity and antibacterial properties represents an improvement for treatment strategy. In this study, quaternized chitosan (hydroxypropyltrimethyl ammonium chloride chitosan, HACC) was grafted to 3D-printed scaffolds composed of polylactide-co-glycolide (PLGA) and hydroxyapatite (HA), in order to design bone engineering scaffolds endowed with antibacterial and osteoconductive properties...
September 26, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27639653/assessment-of-kinematics-and-electromyography-following-arthroscopic-single-tendon-rotator-cuff-repair
#8
Jessica M Fritz, Ryan R Inawat, Brooke A Slavens, John R McGuire, Dean W Ziegler, Sergey S Tarima, Steven I Grindel, Gerald F Harris
BACKGROUND: The increasing demand for rotator cuff (RC) repair patients to return to work as soon as they are physically able has led to exploration of when this is feasible. Current guidelines from our orthopedic surgery clinic recommend a return to work at 9 weeks postoperation. To more fully define capacity to return to work, the current study was conducted using a unique series of quantitative tools. To date, no study has combined 3-dimensional (3D) motion analysis with electromyography (EMG) assessment during activities of daily living (ADLs), including desk tasks, and commonly prescribed rehabilitation exercise...
September 14, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/27629132/posture-and-low-back-pain-during-pregnancy-3d-study
#9
Wojciech M Glinkowski, Paweł Tomasik, Katarzyna Walesiak, Michał Głuszak, Karolina Krawczak, Jakub Michoński, Anna Czyżewska, Agnieszka Żukowska, Robert Sitnik, Mirosław Wielgoś
OBJECTIVES: Back pain is a common complaint of pregnant women. The posture, curvatures of the spine and the center of gravity changes are considered as the mechanisms leading to pain. The study aimed to assess spinal curvatures and static postural characteristics with three-dimensional surface topography and search for relationships with the occurrence of back pain complaints among pregnant women. MATERIAL AND METHODS: The study was conducted from December 2012 to February 2014...
2016: Ginekologia Polska
https://www.readbyqxmd.com/read/27525315/physiotherapy-scoliosis-specific-exercises-a-comprehensive-review-of-seven-major-schools
#10
REVIEW
Hagit Berdishevsky, Victoria Ashley Lebel, Josette Bettany-Saltikov, Manuel Rigo, Andrea Lebel, Axel Hennes, Michele Romano, Marianna Białek, Andrzej M'hango, Tony Betts, Jean Claude de Mauroy, Jacek Durmala
In recent decades, there has been a call for change among all stakeholders involved in scoliosis management. Parents of children with scoliosis have complained about the so-called "wait and see" approach that far too many doctors use when evaluating children's scoliosis curves between 10° and 25°. Observation, Physiotherapy Scoliosis Specific Exercises (PSSE) and bracing for idiopathic scoliosis during growth are all therapeutic interventions accepted by the 2011 International Society on Scoliosis Orthopaedic and Rehabilitation Treatment (SOSORT)...
2016: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/27495933/validity-and-reliability-of-ankle-morphological-measurements-on-computerized-tomography-synthesized-planar-radiographs
#11
Chien-Chung Kuo, Hsuan-Lun Lu, Tung-Wu Lu, Alberto Leardini, Mei-Ying Kuo, Horng-Chaung Hsu
BACKGROUND: Clinical success of total ankle arthroplasty depends heavily on the available information on the morphology of the bones, often obtained from measurements on planar radiographs. The current study aimed to evaluate the intra-rater, inter-rater and inter-session reliability and the validity of radiograph-based measurements of ankle morphology, and to quantify the effects of examiner experience on these measurements. METHODS: Twenty-four fresh frozen ankle specimens were CT scanned, data of which were used to reconstruct 3D volumetric bone models for synthesizing 2D radiographs...
2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27492723/reliability-of-measurements-performed-on-two-dimensional-and-three-dimensional-computed-tomography-in-glenoid-assessment-for-instability
#12
Anna Maria Kubicka, Jakub Stefaniak, Przemysław Lubiatowski, Jan Długosz, Marcin Dzianach, Marcin Redman, Janusz Piontek, Leszek Romanowski
PURPOSE: The main purpose of this study is to establish which of two methods is more reliable in glenoid assessment for instability in pre-operative planning. Accordingly, we have studied the intra- and inter-observer reliability of glenoid parameters with the use of two-dimensional (2D) and three-dimensional (3D) reconstructed computed tomography (CT) images. METHODS: One hundred glenoids were measured with the use of 2D-CT and 3D-CT (in 3D orientation) by two independent observers (one experienced and one inexperienced)...
August 5, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27381807/time-course-of-peri-implant-bone-regeneration-around-loaded-and-unloaded-implants-in-a-rat-model
#13
Shailly H Jariwala, Hwabok Wee, Evan P Roush, Tiffany L Whitcomb, Christopher Murter, Gery Kozlansky, Akhlesh Lakhtakia, Allen R Kunselman, Henry J Donahue, April D Armstrong, Gregory S Lewis
The time-course of cancellous bone regeneration surrounding mechanically loaded implants affects implant fixation, and is relevant to determining optimal rehabilitation protocols following orthopaedic surgeries. We investigated the influence of controlled mechanical loading of titanium-coated polyether-ether ketone (PEEK) implants on osseointegration using time-lapsed, non-invasive, in vivo micro-computed tomography (micro-CT) scans. Implants were inserted into proximal tibial metaphyses of both limbs of eight female Sprague-Dawley rats...
July 6, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27372187/a-combination-of-three-dimensional-printing-and-computer-assisted-virtual-surgical-procedure-for-preoperative-planning-of-acetabular-fracture-reduction
#14
Canjun Zeng, Weirong Xing, Zhanglin Wu, Huajun Huang, Wenhua Huang
OBJECTIVE: Treatment of acetabular fractures remains one of the most challenging tasks that orthopaedic surgeons face. An accurate assessment of the injuries and preoperative planning are essential for an excellent reduction. The purpose of this study was to evaluate the feasibility, accuracy and effectiveness of performing 3D printing technology and computer-assisted virtual surgical procedures for preoperative planning in acetabular fractures. We hypothesised that more accurate preoperative planning using 3D printing models will reduce the operation time and significantly improve the outcome of acetabular fracture repair...
March 17, 2016: Injury
https://www.readbyqxmd.com/read/27324800/3d-printing-of-calcium-phosphate-ceramics-for-bone-tissue-engineering-and-drug-delivery
#15
Ryan Trombetta, Jason A Inzana, Edward M Schwarz, Stephen L Kates, Hani A Awad
Additive manufacturing, also known as 3D printing, has emerged over the past 3 decades as a disruptive technology for rapid prototyping and manufacturing. Vat polymerization, powder bed fusion, material extrusion, and binder jetting are distinct technologies of additive manufacturing, which have been used in a wide variety of fields, including biomedical research and tissue engineering. The ability to print biocompatible, patient-specific geometries with controlled macro- and micro-pores, and to incorporate cells, drugs and proteins has made 3D-printing ideal for orthopaedic applications, such as bone grafting...
June 20, 2016: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/27236651/navigation-system-for-robot-assisted-intra-articular-lower-limb-fracture-surgery
#16
Giulio Dagnino, Ioannis Georgilas, Paul Köhler, Samir Morad, Roger Atkins, Sanja Dogramadzi
PURPOSE: In the surgical treatment for lower-leg intra-articular fractures, the fragments have to be positioned and aligned to reconstruct the fractured bone as precisely as possible, to allow the joint to function correctly again. Standard procedures use 2D radiographs to estimate the desired reduction position of bone fragments. However, optimal correction in a 3D space requires 3D imaging. This paper introduces a new navigation system that uses pre-operative planning based on 3D CT data and intra-operative 3D guidance to virtually reduce lower-limb intra-articular fractures...
October 2016: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/27154291/preoperative-planning-and-postoperative-evaluation-of-total-hip-arthroplasty-that-takes-combined-anteversion
#17
Hiroshi Imai, Joji Miyawaki, Tomomi Kamada, Jun Takeba, Naohiko Mashima, Hiromasa Miura
The purpose of this study was to investigate whether postoperative combined anteversion (CA) can be kept within the safe zone while using cementless total hip arthroplasty (THA) using the operative technique which prepares the socket first for developmental dysplasia of the hip (DDH), by estimating the anteversion of the metaphyseal fit stem using preoperative three-dimensional (3D) computerized planning and by adjusting the anteversion of the socket using a navigation system that considers CA. Our subjects were 65 patients (65 hips) that had undergone cementless THA for DDH that could be observed for 1 year or more...
July 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/27151571/autonomous-magnetic-labelling-of-functional-mesenchymal-stem-cells-for-improved-traceability-and-spatial-control-in-cell-therapy-applications
#18
Richard Harrison, Hareklea Markides, Robert H Morris, Paula Richards, Alicia J El Haj, Virginie Sottile
Mesenchymal stem cells (MSCs) represent a valuable resource for regenerative medicine treatments for orthopaedic repair and beyond. Following developments in isolation, expansion and differentiation protocols, efforts to promote clinical translation of emerging cellular strategies now seek to improve cell delivery and targeting. This study shows efficient live MSC labelling using silica-coated magnetic particles (MPs), which enables 3D tracking and guidance of stem cells. A procedure developed for the efficient and unassisted particle uptake was shown to support MSC viability and integrity, while surface marker expression and MSC differentiation capability were also maintained...
May 6, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27133084/the-role-of-3d-modelling-and-printing-in-orthopaedic-tissue-engineering-a-review-of-the-current-literature
#19
S Shaunak, B S Dhinsa, W S Khan
Orthopaedic surgery lends itself well to advances in technology. An area of interest and ongoing research is that of the production of scaffolds for use in trauma and elective surgery. 3D printing provides unprecedented accuracy in terms of micro- and macro-structure and geometry for scaffold production. It can also be utilised to construct scaffolds of a variety of different materials and more recently has allowed for the construction of bio-implants which recapitulate bone and cartilage tissue. This review seeks to look at the various methods of 3DP, the materials used, elements of functionality and design, as well as modifications to increase the biomechanics and bioactivity of 3DP scaffolds...
April 29, 2016: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27090722/reliability-of-3-dimensional-computed-tomography-for-application-of-the-bernard-quadrant-method-in-femoral-tunnel-position-evaluation-after-anatomic-anterior-cruciate-ligament-reconstruction
#20
Dong Hwi Kim, Won-Bong Lim, Sung-Won Cho, Chae-Won Lim, Suenghwan Jo
PURPOSE: To validate whether the Bernard quadrant method, which was developed for application on simple lateral radiography, can be used with 3-dimensional computed tomography (3D CT) to localize the femoral insertion of the reconstructed anterior cruciate ligament (ACL). METHODS: We analyzed 32 knees with ACL tears that were reconstructed using a metal interference screw for fixation at the femoral tunnel between March 2012 and May 2013. Postoperative lateral radiographs and 3D CT images were obtained 7 days after the operation...
August 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
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