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3D orthopaedics devices

Woojin Cho, Alan Varkey Job, Jing Chen, Jung Hwan Baek
Three-dimensional (3D) printing is a transformative technology with a potentially wide range of applications in the field of orthopaedic spine surgery. This article aims to review the current applications, limitations, and future developments of 3D printing technology in orthopaedic spine surgery. Current preoperative applications of 3D printing include construction of complex 3D anatomic models for improved visual understanding, preoperative surgical planning, and surgical simulations for resident education...
February 2018: Asian Spine Journal
R Dana Carpenter, Brett S Klosterhoff, F Brennan Torstrick, Kevin T Foley, J Kenneth Burkus, Christopher S D Lee, Ken Gall, Robert E Guldberg, David L Safranski
Osseointegration of load-bearing orthopaedic implants, including interbody fusion devices, is critical to long-term biomechanical functionality. Mechanical loads are a key regulator of bone tissue remodeling and maintenance, and stress-shielding due to metal orthopaedic implants being much stiffer than bone has been implicated in clinical observations of long-term bone loss in tissue adjacent to implants. Porous features that accommodate bone ingrowth have improved implant fixation in the short term, but long-term retrieval studies have sometimes demonstrated limited, superficial ingrowth into the pore layer of metal implants and aseptic loosening remains a problem for a subset of patients...
April 2018: Journal of the Mechanical Behavior of Biomedical Materials
T Vaillant, J Steelandt, A-L Cordonnier, S Haghighat, P Anract, P Paubel, C Duhamel
OBJECTIVES: Single use patient-specific instruments (PSI) for total knee prosthesis are introduced as a new alternative to conventional ancillaries and computer assisted surgery by improving implants positioning. An exhaustive review was carried out to identify their specific characteristics, with their advantages and disadvantages. METHODS: Medical devices suppliers were consulted in 2015 for reviewing their PSI. Their technical, clinical and economic data were compared...
May 2018: Annales Pharmaceutiques Françaises
J Goerres, A Uneri, M Jacobson, B Ramsay, T De Silva, M Ketcha, R Han, A Manbachi, S Vogt, G Kleinszig, J-P Wolinsky, G Osgood, J H Siewerdsen
Percutaneous pelvic screw placement is challenging due to narrow bone corridors surrounded by vulnerable structures and difficult visual interpretation of complex anatomical shapes in 2D x-ray projection images. To address these challenges, a system for planning, guidance, and quality assurance (QA) is presented, providing functionality analogous to surgical navigation, but based on robust 3D-2D image registration techniques using fluoroscopy images already acquired in routine workflow. Two novel aspects of the system are investigated: automatic planning of pelvic screw trajectories and the ability to account for deformation of surgical devices (K-wire deflection)...
November 13, 2017: Physics in Medicine and Biology
Jorge Rodríguez de Guzmán-Barrera, Carla Sáez Martínez, Montserrat Boronat-Catalá, Jose María Montiel-Company, Vanessa Paredes-Gallardo, José Luís Gandía-Franco, José Manuel Almerich-Silla, Carlos Bellot-Arcís
Recently, new strategies for treating class III malocclusions have appeared. Skeletal anchorage appears to reduce the dentoalveolar effects while maximising the orthopaedic effect in growing patients. The purpose of this systematic review and meta-analysis is to examine the effectiveness of bone anchorage devices for interceptive treatment of skeletal class III malocclusions. Searches were made in the Pubmed, Embase, Scopus and Cochrane databases, as well as in a grey literature database, and were complemented by hand-searching...
2017: PloS One
Kevin Phan, Alessandro Sgro, Monish M Maharaj, Paul D'Urso, Ralph J Mobbs
The study aims to describe a three-dimensional printed (3DP) posterior fixation implant used for C1/C2 fusion in a 65-year-old female. Spinal fusion remains a common intervention for a range of spinal pathologies including degenerative disc and facet disease when conservative methods are unsuccessful. However, fusion devices are not always entirely efficacious in providing the desired fixation, and surgeons rely on 'off the shelf' implants which may not provide an anatomical fit to address the particular pathology...
December 2016: Journal of Spine Surgery (Hong Kong)
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
C Hirsch, C Breque, S Ragot, H Pascal-Mousselard, J-P Richer, M Scepi, F Khiami
BACKGROUND: Lumbar spinal stenosis is a major public health issue. Interspinous devices implanted using minimally invasive techniques may constitute an alternative to the reference standard of bony decompression with or without intervertebral fusion. However, their indications remain unclear, due to a paucity of clinical and biomechanical data. Our objective was to evaluate the effects of four interspinous process devices implanted at L4-L5 on the intervertebral foramen surface areas at the treated and adjacent levels, in flexion and in extension...
April 2015: Orthopaedics & Traumatology, Surgery & Research: OTSR
Adám Tibor Schlégl, Kinga Szuper, Szabolcs Somoskeöy, Péter Than
INTRODUCTION: Lower limbs anatomical and biomechanical parameters are essential in several paediatric orthopaedic disease, which makes their exact measurement necessary. AIM: The aim of the author was to evaluate the reliability of the EOS 2D/3D System, a 3D reconstruction capable imaging device in children. METHOD: 3D reconstructions were performed in 523 cases aged between 2 and 16 years in whom no abnormality influencing lower limbs biomechanics was observed...
October 26, 2014: Orvosi Hetilap
I B Maksimov, L K Brizhan', V L Astashov, D V Davydov, A A Kerimov, Iu V Arbuzov, D I Varfolomeev
Injuries of the musculoskeletal system are at 60% of all battlefield injures and take first place in modern military conflicts. The main antishock measures are: pain management, emergency bleeding control, bone fragment positioning and fracture fixation. Specialist of the centre of traumatology and orthopaedics of the Burdenko General Military Clinical Hospital in cooperation with specialists of department of battlefield surgery of Mandryka Clinical Research and Training Medical Centre analysed the most effective domestic and foreign external fixators and developed Rod field package (RFP)...
April 2014: Voenno-medit︠s︡inskiĭ Zhurnal
B Schlatterer, J-M Linares, P Chabrand, J-M Sprauel, J-N Argenson
BACKGROUND: For over a decade, computer-assisted orthopaedic surgery for total knee arthroplasty has been accepted as ensuring accurate implant alignment in the coronal plane. HYPOTHESIS: We hypothesised that lack of accuracy in skeletal landmark identification during the acquisition phase and/or measurement variability of the infrared optical system may limit the validity of the numerical information used to guide the surgical procedure. METHODS: We built a geometric model of a navigation system, with no preoperative image acquisition, to simulate the stages of the acquisition process...
June 2014: Orthopaedics & Traumatology, Surgery & Research: OTSR
Mahboubeh Kabiri, Betul Kul, William B Lott, Kathryn Futrega, Parisa Ghanavi, Zee Upton, Michael R Doran
Mesenchymal stem/stromal cells (MSC) are rapidly becoming a leading candidate for use in tissue regeneration, with first generation of therapies being approved for use in orthopaedic repair applications. Capturing the full potential of MSC will likely require the development of novel in vitro culture techniques and devices. Herein we describe the development of a straightforward surface modification of an existing commercial product to enable the efficient study of three dimensional (3D) human bone marrow-derived MSC osteogenic differentiation...
March 9, 2012: Biochemical and Biophysical Research Communications
Peifu Tang, Lei Hu, Hailong Du, Minli Gong, Lihai Zhang
BACKGROUND: Long-bone fractures are very common in trauma centers. The conventional Arbeitsgemeindschaft fur Osteosynthesefragen (AO) technique contributes to most fracture healing problems, and external fixation technology also has several disadvantages, so new techniques are being explored. METHOD: A novel hexapod computer-assisted fracture reduction system based on a 3D-CT image reconstruction process is presented for closed reduction of long-bone diaphyseal fractures...
March 2012: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
Joung-Hyun Lee, Yexin Gu, Hongjun Wang, Woo Y Lee
We report the use of a microfluidic 3D bone tissue model, as a high-throughput means of evaluating the efficacy of biomaterials aimed at accelerating orthopaedic implant-related wound-healing while preventing bacterial infection. As an example of such biomaterials, inkjet-printed micropatterns were prepared to contain antibiotic and biphasic calcium phosphate (BCP) nanoparticles dispersed in a poly(D,L-lactic-co-glycolic) acid matrix. The micropatterns were integrated with a microfluidic device consisting of eight culture chambers...
February 2012: Biomaterials
Evgenij Bobrowitsch, Christof Hurschler, Gavin Olender, Christian Plaass, Hazibullah Waizy, Heino Arnold, Christina Stukenborg-Colsman
BACKGROUND: Orthopaedic research projects focusing on small displacements in a small measurement volume require a radiation free, three dimensional motion analysis system. A stereophotogrammetrical motion analysis system can track wireless, small, light-weight markers attached to the objects. Thereby the disturbance of the measured objects through the marker tracking can be kept at minimum. The purpose of this study was to develop and evaluate a non-position fixed compact motion analysis system configured for a small measurement volume and able to zoom while tracking small round flat markers in respect to a fiducial marker which was used for the camera pose estimation...
2011: Biomedical Engineering Online
Joung-Hyun Lee, Hongjun Wang, Jeffrey B Kaplan, Woo Y Lee
With conventional in vitro culture methods, it is difficult to study complex interactions of host cells with pathogens and drugs in physiologically relevant microenvironments. To simulate orthopaedic implant-associated infection, a multi-channel microfluidic device was used to (1) observe in real-time the development of osteoblasts into three-dimensional (3D) tissue-like structures and (2) study how this development was influenced by phenotypes of Staphylococcus epidermidis. In the absence of bacteria, osteoblasts formed a confluent layer on the bottom channel surface, gradually migrated to the side and top surfaces, and formed calcified 3D nodular structures in 8 days...
January 2011: Tissue Engineering. Part C, Methods
M-Y Lee, C H Kuo, S-S Hung
During the treatment of tibia fracture with interlocking nails, the most uncomfortable procedure is for an orthopaedic surgeon to find the location for the distal locking screws. In this study, a fluoroscopy-free non-contact navigation device was developed for the placement of distal locking screws in the tibia intramedullary nailing. This device utilizes a 3D digitization arm integrated with spatial coordinate registration module, graphical user interface module and sound-guided navigation module. The 3D digitization arm, a five-DOF passive robotic arm, was used to register the spatial coordinates of proximal and distal landmarks just before placement of the nail...
July 2008: Journal of Medical Engineering & Technology
Ryutaro Fujii, Hironobu Sakaura, Yoshihiro Mukai, Noboru Hosono, Takahiro Ishii, Motoki Iwasaki, Hideki Yoshikawa, Kazuomi Sugamoto
In vivo three-dimensional (3D) kinematics of the lumbar spine has not been well evaluated by the conventional methods because of their methodological limitations, while 3D intervertebral motions have been quantitatively determined by cadaver studies. We thus developed a novel 3D analyzing system for the relative motions of individual vertebrae using 3D magnetic resonance imaging (MRI) and analyzed in vivo 3D intervertebral motions of the lumbar spine during trunk rotation. Ten healthy volunteers underwent 3D MRI of the lumbar spine in nine positions with 15 degrees increments during trunk rotation (0 degrees , 15 degrees , 30 degrees , 45 degrees , and maximum)...
November 2007: European Spine Journal
Michael J Gardner, Musa Citak, Daniel Kendoff, Tobias Hüfner, Christian Krettek
INTRODUCTION: Computer navigation in orthopaedic procedures can improve accuracy and decrease radiation time compared to traditional fluoroscopy. Many different applications are now available, and drilling is commonly used amongst them. Aside from additional set up time required, the drilling procedure itself may take a significant amount of time. We hypothesised that using an external stabilising guide which can be set anywhere in space can decrease then time necessary for navigated drilling...
July 2007: Injury
Erik Cattrysse, Jean-Pierre Baeyens, Peter Van Roy, Olivier Van de Wiele, Tom Roosens, Jan-Pieter Clarys
In sport, leisure and certain occupational activities, joint lesions of the upper limb are very common. To understand their aetiology in order to prevent and treat these pathologies on a scientific basis, a comprehensive knowledge of the involved stress and kinematics is imperative. For many years intra-articular joint kinematics have been described hypothetically in terms of the convex-concave principle. This principle, however, has not been validated. The in vitro research on the acromioclavicular, glenohumeral and elbow joints was performed using an electromagnetic tracking device (Flock of Birds)...
September 15, 2005: Ergonomics
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