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3D orthopaedics devices

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
Renée Lampe, Jürgen Mitternacht, Silvia Schrödl, Ludger Gerdesmeyer, Michaela Natrath, Reiner Gradinger
In our gait laboratory, the gait pattern of 18 youths with neurogenic foot deformities as a result of spina bifida or cerebral palsy was examined. The influence of technical orthopaedic devices for the foot and ankle on kinematics and kinetics of the gait and especially of the knee joint were analyzed. Kinematic data were derived from 3D-video analysis, kinetic data from force plates and pressure distribution plates. Muscle activities were measured with eight-channel EMG. The data were examined to see if there were differences when using the technical devices...
June 2004: Brain & Development
Marco Viceconti, Riccardo Lattanzi, Cinzia Zannoni, Angelo Cappello
Graphical representation of a patient's anatomy is fairly similar in the majority of orthopaedic surgery planning programs. The position of implantable devices is usually established using a three-pane window showing 2D cross sections of the CT data set taken on three user-selectable orthogonal planes. In some cases this orthogonal-plane representation is replaced or extended by interactive 3D visualization, obtained using surface rendering techniques. These ways to represent the CT data come naturally and easily to the programmer...
March 2002: Medical Informatics and the Internet in Medicine
H Handels, J Ehrhardt, W Plötz, S J Pöppl
OBJECTIVE: This article presents the VIRTOPS (VIRTual Operation Planning in Orthopaedic Surgery) software system for virtual preoperative planning and simulation of hip operations. The system is applied to simulate the endoprosthetic reconstruction of the hip joint with hemipelvic replacement, and supports the individual design of anatomically adaptable, modular prostheses in bone tumor surgery. The virtual planning of the operation and the construction of the individual implant are supported by virtual reality techniques...
2001: Computer Aided Surgery: Official Journal of the International Society for Computer Aided Surgery
H Handels, J Ehrhardt, W Plötz, S J Pöppl
The introduction of virtual reality techniques in medicine opens up new possibilities for the planning of interventions. The presented software system for virtual operation planning in orthopaedic surgery (VIRTOPS) enables the virtual preoperative 3D planning and simulation of pelvis and hip operations. It is used to plan operations of bone tumours with endoprosthetic reconstruction of the hip based on multimodal image information. The operation and the endosprothetic reconstruction of the pelvis are simulated using virtual reality techniques...
September 2000: International Journal of Medical Informatics
L Beaudoin, K F Zabjek, M A Leroux, C Coillard, C H Rivard
A small leg length inequality, either true or functional, can be implicated in the pathogenesis of numerous spinal disorders. The correction of a leg length inequality with the goal of treating a spinal pathology is often achieved with the use of a shoe lift. Little research has focused on the impact of this correction on the three-dimensional (3D) postural organisation. The goal of this study is to quantify in control subjects the 3D postural changes to the pelvis, trunk, scapular belt and head, induced by a shoe lift...
1999: European Spine Journal
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