Read by QxMD icon Read

3d orthopaedics

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
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
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
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
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
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
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
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
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
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
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
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
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
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
Jonathan S Mulford, Sina Babazadeh, Neil Mackay
Three-dimensional (3D) printing is a rapidly evolving technology with the potential for significant contributions to surgical practice. There are many current applications for 3D printing technology with future applications being explored. This technology has applications in preoperative planning, education, custom manufacturing (implants, prosthetics and surgical guides) and exciting potential for biological applications. This article reviews the current and future applications of 3D technology in orthopaedic surgery...
September 2016: ANZ Journal of Surgery
Furqan A Shah, Omar Omar, Felicia Suska, Anders Snis, Aleksandar Matic, Lena Emanuelsson, Birgitta Norlindh, Jukka Lausmaa, Peter Thomsen, Anders Palmquist
UNLABELLED: In orthopaedic surgery, cobalt chromium (CoCr) based alloys are used extensively for their high strength and wear properties, but with concerns over stress shielding and bone resorption due to the high stiffness of CoCr. The structural stiffness, principally related to the bulk and the elastic modulus of the material, may be lowered by appropriate design modifications, to reduce the stiffness mismatch between metal/alloy implants and the adjacent bone. Here, 3D printed CoCr and Ti6Al4V implants of similar macro-geometry and interconnected open-pore architecture prepared by electron beam melting (EBM) were evaluated following 26week implantation in adult sheep femora...
May 2016: Acta Biomaterialia
Caitlin C Ploch, Chris S S A Mansi, Jayaratnam Jayamohan, Ellen Kuhl
BACKGROUND: Three-dimensional (3D) printing holds promise for a wide variety of biomedical applications, from surgical planning, practicing, and teaching to creating implantable devices. The growth of this cheap and easy additive manufacturing technology in orthopedic, plastic, and vascular surgery has been explosive; however, its potential in the field of neurosurgery remains underexplored. A major limitation is that current technologies are unable to directly print ultrasoft materials like human brain tissue...
June 2016: World Neurosurgery
Junning Chen, Liangjian Chen, Che-Cheng Chang, Zhongpu Zhang, Wei Li, Michael V Swain, Qing Li
Design of prosthetic implants to ensure rapid and stable osseointegration remains a significant challenge, and continuous efforts have been directed to new implant materials, structures and morphology. This paper aims to develop and characterise a porous titanium dental implant fabricated by metallic powder injection-moulding. The surface morphology of the specimens was firstly examined with a scanning electron microscope (SEM), followed by microscopic computerised tomography (μ-CT) scanning to capture its 3D microscopic features non-destructively...
February 25, 2016: International Journal for Numerical Methods in Biomedical Engineering
Mihaela A M Constantinescu, Su-Lin Lee, Nikhil V Navkar, Weimin Yu, Saifedeen Al-Rawas, Julien Abinahed, Guoyan Zheng, Jennifer Keegan, Abdulla Al-Ansari, Nabil Jomaah, Philippe Landreau, Guang-Zhong Yang
Reconstruction of the anterior cruciate ligament (ACL) through arthroscopy is one of the most common procedures in orthopaedics. It requires accurate alignment and drilling of the tibial and femoral tunnels through which the ligament graft is attached. Although commercial computer-assisted navigation systems exist to guide the placement of these tunnels, most of them are limited to a fixed pose without due consideration of dynamic factors involved in different knee flexion angles. This paper presents a new model for intraoperative guidance of arthroscopic ACL reconstruction with reduced error particularly in the ligament attachment area...
July 2016: IEEE Transactions on Medical Imaging
Geraldine Koenig, Hayriye Ozcelik, Lisa Haesler, Martina Cihova, Sait Ciftci, Agnes Dupret-Bories, Christian Debry, Martin Stelzle, Philippe Lavalle, Nihal Engin Vrana
UNLABELLED: Porous titanium implants are widely used in dental, orthopaedic and otorhinolaryngology fields to improve implant integration to host tissue. A possible step further to improve the integration with the host is the incorporation of autologous cells in porous titanium structures via cell-laden hydrogels. Fast gelling hydrogels have advantageous properties for in situ applications such as localisation of specific cells and growth factors at a target area without dispersion. The ability to control the cell types in different regions of an implant is important in applications where the target tissue (i) has structural heterogeneity (multiple cell types with a defined spatial configuration with respect to each other); (ii) has physical property gradients essential for its function (such as in the case of osteochondral tissue transition)...
March 2016: Acta Biomaterialia
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"