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3D prosthetic

Michel P Bonnin, Tom Van Hoof, Arnoud De Kok, Matthias Verstraete, Catherine Van der Straeten, Moreno Saffarini, Jan Victor
BACKGROUND: In Total Knee Arthroplasty (TKA), residual pain may be secondary to soft tissue impingements, which are difficult to visualize around chromium-cobalt implants using medical imaging, so their interactions remain poorly understood. The goal of this work was to establish a protocol for in-vitro imaging of the soft tissues around TKA, usable during throughout the range of motion (ROM). METHODS: The full size range of a commercially available TKA prosthesis was manufactured by 3D-printing in non-magnetic and non-radiopaque polymer and implanted in 12 cadaveric knees...
December 2016: Journal of Experimental Orthopaedics
Cesar Colasante, Kyle Silva, Yuxi Chen, Matthew N Bartels
No abstract text is available yet for this article.
September 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
Bryan T Harris, Daniel Montero, Gerald T Grant, Dean Morton, Daniel R Llop, Wei-Shao Lin
This clinical report proposes a digital workflow using 2-dimensional (2D) digital photographs, a 3D extraoral facial scan, and cone beam computed tomography (CBCT) volumetric data to create a 3D virtual patient with craniofacial hard tissue, remaining dentition (including surrounding intraoral soft tissue), and the realistic appearance of facial soft tissue at an exaggerated smile under static conditions. The 3D virtual patient was used to assist the virtual diagnostic tooth arrangement process, providing patient with a pleasing preoperative virtual smile design that harmonized with facial features...
September 22, 2016: Journal of Prosthetic Dentistry
Guillermo Robles, José Manuel Fresno, Romano Giannetti
The design and optimization of protective equipment and devices such as exoskeletons and prosthetics have the potential to be enhanced by the ability of accurately measure the positions of the bones during movement. Existing technologies allow a quite precise measurement of motion-mainly by using coordinate video-cameras and skin-mounted markers-but fail in directly measuring the bone position. Alternative approaches, as fluoroscopy, are too invasive and not usable during extended lapses of time, either for cost or radiation exposure...
September 22, 2016: ISA Transactions
Amir A Zadpoor, Jos Malda
The introduction of additive manufacturing (AM), often referred to as three-dimensional (3D) printing, has initiated what some believe to be a manufacturing revolution, and has expedited the development of the field of biofabrication. Moreover, recent advances in AM have facilitated further development of patient-specific healthcare solutions. Customization of many healthcare products and services, such as implants, drug delivery devices, medical instruments, prosthetics, and in vitro models, would have been extremely challenging-if not impossible-without AM technologies...
September 8, 2016: Annals of Biomedical Engineering
Yong Lin Kong, Maneesh K Gupta, Blake N Johnson, Michael C McAlpine
The ability to three-dimensionally interweave biological and functional materials could enable the creation of bionic devices possessing unique and compelling geometries, properties, and functionalities. Indeed, interfacing high performance active devices with biology could impact a variety of fields, including regenerative bioelectronic medicines, smart prosthetics, medical robotics, and human-machine interfaces. Biology, from the molecular scale of DNA and proteins, to the macroscopic scale of tissues and organs, is three-dimensional, often soft and stretchable, and temperature sensitive...
June 2016: Nano Today
Amaia Hernandez, Edward Lemaire
BACKGROUND AND AIM: Prosthetic CAD/CAM systems require accurate 3D limb models; however, difficulties arise when working from the person's socket since current 3D scanners have difficulties scanning socket interiors. While dedicated scanners exist, they are expensive and the cost may be prohibitive for a limited number of scans per year. A low-cost and accessible photogrammetry method for socket interior digitization is proposed, using a smartphone camera and cloud-based photogrammetry services...
September 9, 2016: Prosthetics and Orthotics International
Cláudia Lopes Brilhante Bhering, Marcelo Ferraz Mesquita, Daniel Takanori Kemmoku, Pedro Yoshito Noritomi, Rafael Leonardo Xediek Consani, Valentim Adelino Ricardo Barão
We evaluated two treatment concepts for the rehabilitation of moderate atrophic maxilla with dental implants (all-on-four and all-on-six) and the effect of framework material on the stress distribution of implant-support system. A three-dimensional finite element model based on a prototype was built to simulate an entirely edentulous maxilla with moderate sinus pneumatization that was rehabilitated with a full-arch fixed dental prosthesis. Four standard implants were positioned according to the all-on-four concept and four standard implants and two short implants were placed according to the all-on-six concept...
December 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
Tyler D Klenow, Jason T Kahle, M Jason Highsmith
BACKGROUND: The "dead spot" phenomenon in prosthetics is a disruption in forward progression observed in the rearfoot of passive prosthetic foot-ankle systems which results in a compensatory and inefficient gait pattern by amputees. A metric to quantify the dead spot as a kinetic event has not yet been introduced. The present study implements a three-part metric to evaluate the dead spot in terms of time, magnitude, and total area using center of pressure velocity and a novel threshold value calculation...
October 2016: Clinical Biomechanics
Susan Smith
Early last year, a non-profit organisation called 'Limbitless Solutions' modelled a 3D printed prosthetic arm on a fighting suit that features in the popular superhero film series, Iron Man (2008-2013). In addition, 'Limbitless Solutions' resourcefully deployed the fictional character and inventor of the Iron Man suit, weapons specialist and philanthropist, Tony Stark, played by Robert Downey Jr, in a celebrity/superhero endorsed promotional short film, showing 'Tony', the 'real Iron Man', gifting the futuristic military styled 'gauntlet' to Alex, a 7-year-old boy with a partially developed right arm...
August 29, 2016: Medical Humanities
Candice Y Lee, Joshua K Wong, Ronald E Ross, David C Liu, Kamal R Khabbaz, Angelo J Martellaro, Heather R Gorea, Jude S Sauer, Peter A Knight
OBJECTIVE: Prostheses attachment is critical in aortic valve replacement surgery, yet reliable prosthetic security remains a challenge. Accurate techniques to analyze prosthetic fixation pressures may enable the use of fewer sutures while reducing the risk of paravalvular leaks (PVL). METHODS: Customized digital thin film pressure transducers were sutured between aortic annulus models and 21-mm bioprosthetic valves with 15 × 4-mm, 12 × 4-mm, or 9 × 6-mm-wide pledgeted mattress sutures...
August 25, 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
Patrick J Denard, Evan Lederman, Bradford O Parsons, Anthony A Romeo
The purpose of this study was to evaluate glenoid-sided lateralization in reverse shoulder arthroplasty (RSA) and compare bony and prosthetic lateralization. The hypothesis was that stress and displacement would increase with progressive bony lateralization and be lower with prosthetic lateralization. A 3D finite element analysis (FEA) was performed on a commercially available RSA prosthesis. Stress and displacement were evaluated at baseline and following 5, 10, and 15 mm of bony or prosthetic lateralization...
August 17, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Sercan Küçükkurt, Gökhan Alpaslan, Ahmet Kurt
OBJECTIVE: In this study, we compared the success of sinus lifting and alternative treatment methods in applying dental implants in cases lacking adequate bone due to pneumatization of the maxillary sinus. METHODS: In a computer environment, 3D models were created using computerized tomography data from a patient. Additionally, implants and abutments were scanned at the macroscopic level, and the resulting images were transferred to the 3D models. Five different models were examined: a control model, lateral sinus lifting (LSL), short dental implant placement (SIP), tilted implant placement (TIP) and distal prosthetic cantilever (DC) use...
August 8, 2016: Computer Methods in Biomechanics and Biomedical Engineering
Giorgio Andrea Dolcini, Marco Colombo, Carlo Mangano
Scope. To demonstrate guided implant placement and the application of fixed, implant-supported prosthetic restorations with a fully digital workflow. Methods. Over a 2-year period, all patients with partial edentulism of the posterior maxilla, in need of fixed implant-supported prostheses, were considered for inclusion in this study. The protocol required intraoral scanning and cone beam computed tomography (CBCT), the superimposition of dental-gingival information on bone anatomy, surgical planning, 3D-printed teeth-supported surgical templates, and modelling and milling of polymethylmethacrylate (PMMA) temporaries for immediate loading...
2016: International Journal of Dentistry
Erokan Canbazoglu, Yucel Batu Salman, Mustafa Eren Yildirim, Burak Merdenyan, Ibrahim Furkan Ince
The field of dentistry lacks satisfactory tools to help visualize planned procedures and their potential results to patients. Dentists struggle to provide an effective image in their patient's mind of the end results of the planned treatment only through verbal explanations. Thus, verbal explanations alone often cannot adequately help the patients make a treatment decision. Inadequate attempts are frequently made by dentists to sketch the procedure for the patient in an effort to depict the treatment. These attempts however require an artistic ability not all dentists have...
2016: Computational and Structural Biotechnology Journal
Camila Lima de Andrade, Marco Aurélio Carvalho, Altair Antoninha Del Bel Cury, Bruno Salles Sotto-Maior
PURPOSE: Dental implant macrogeometry parameters, such as the prosthetic connection and implant body shape, can influence the biomechanical behavior of the restoration. Using tridimensional finite element analysis (3D-FEA), this study evaluated the biomechanical behavior of two implant macrodesign parameters (prosthetic connection and implant body shape) in low-quality bone. MATERIALS AND METHODS: Four groups were obtained by the combination of external hexagon and Morse taper connections, and cylindrical and conical body shapes...
July 2016: International Journal of Oral & Maxillofacial Implants
Ignacio Delgado-Martínez, Jordi Badia, Arán Pascual-Font, Alfonso Rodríguez-Baeza, Xavier Navarro
One of the most sought-after applications of neuroengineering is the communication between the arm and an artificial prosthetic device for the replacement of an amputated hand or the treatment of peripheral nerve injuries. For that, an electrode is placed around or inside the median nerve to serve as interface for recording and stimulation of nerve signals coming from the fascicles that innervate the muscles responsible for hand movements. Due to the lack of a standard procedure, the electrode implantation by the surgeon is strongly based on intuition, which may result in poor performance of the neuroprosthesis because of the suboptimal location of the neural interface...
2016: Frontiers in Neuroscience
Cenk Sarı, Tahir Durmaz, Bilge Duran Karaduman, Telat Keleş, Hüseyin Bayram, Serdal Baştuğ, Mehmet Burak Özen, Nihal Akar Bayram, Emine Bilen, Hüseyin Ayhan, Hacı Ahmet Kasapkara, Engin Bozkurt
Transcatheter aortic valve implantation (TAVI) was introduced as an alternative treatment for patients with severe symptomatic aortic stenosis for whom surgery would be high-risk. Prosthetic aortic valve endocarditis is a serious complication of surgical AVR (SAVR) with high morbidity and mortality. According to recent cases, post-TAVI prosthetic valve endocarditis (PVE) seems to occur very rarely. We present the case of a 75-year-old woman who underwent TAVI (Edwards Saphien XT) with an uneventful postoperative stay...
March 2016: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
Wojciech I Ryniewicz, Anna M Ryniewicz, Grażyna Wiśniewska
PURPOSE: The aim of the study was the in vitro evaluation of the accuracy of shape imaging of abutment teeth using different impression compounds. METHODS: To compare the accuracy of the shape of the numerically imaged real prosthetic abutments with the tested models of abutments obtained with the replica technique, the Geomagic Qualify program was applied. Making use of the licensed program Statistica, statistical analysis of the results obtained was conducted...
2016: Acta of Bioengineering and Biomechanics
Samy Tunchel, Alberto Blay, Roni Kolerman, Eitan Mijiritsky, Jamil Awad Shibli
This prospective 3-year follow-up clinical study evaluated the survival and success rates of 3DP/AM titanium dental implants to support single implant-supported restorations. After 3 years of loading, clinical, radiographic, and prosthetic parameters were assessed; the implant survival and the implant-crown success were evaluated. Eighty-two patients (44 males, 38 females; age range 26-67 years) were enrolled in the present study. A total of 110 3DP/AM titanium dental implants (65 maxilla, 45 mandible) were installed: 75 in healed alveolar ridges and 35 in postextraction sockets...
2016: International Journal of Dentistry
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