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3D titanium implants

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https://www.readbyqxmd.com/read/29124002/three-dimensional-reconstruction-of-late-post-traumatic-orbital-wall-defects-by-customized-implants-using-cad-cam-3d-stereolithographic-models-a-case-report
#1
Vignesh U, Divya Mehrotra, Dichen, Vaibhav Anand, Debraj Howlader
Aim: Purpose of this case report is to highlight the precision and accuracy obtained with patient specific implants for orbital reconstruction designed on the basis of volumetric analysis of orbital computed tomographic scan (CT) scans using virtual planning, computerised designing and manufacturing and stereolithographic models to correct late post-traumatic orbital deformities such as enophthalmos and diplopia. Material and methods: This case report describes a patient who visited our outpatient clinic for correction of enophthalmos and persistent diplopia in upward gaze, seven months post trauma...
September 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/29103890/large-osseous-defect-reconstruction-using-a-custom-three-dimensional-printed-titanium-truss-implant
#2
Eric So, Vincent H Mandas, Lee Hlad
Treatment of large osseous defects remains a difficult surgical challenge. Autografts and allografts have been known to undergo late collapse, because these options are not specifically designed to withstand the high loads of the foot and ankle. The inability to achieve the correct shape for reconstruction further limits their application. Large osseous defects will result during salvage after failed Lapidus bunionectomy, explantation of failed total ankle replacements, and nonunion of Evans calcaneal osteotomy...
November 2, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29095963/comparative-evaluation-of-a-four-implant-supported-polyetherketoneketone-framework-prosthesis-a-three-dimensional-finite-element-analysis-based-on-cone-beam-computed-tomography-and-computer-aided-design
#3
Ki-Sun Lee, Sang-Wan Shin, Sang-Pyo Lee, Jong-Eun Kim, Jee-Hwan Kim, Jeong-Yol Lee
PURPOSE: The purpose of this pilot study was to evaluate and compare polyetherketoneketone (PEKK) with different framework materials for implant-supported prostheses by means of a three-dimensional finite element analysis (3D-FEA) based on cone beam computed tomography (CBCT) and computer-aided design (CAD) data. MATERIALS AND METHODS: A geometric model that consisted of four maxillary implants supporting a prosthesis framework was constructed from CBCT and CAD data of a treated patient...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29068576/assessment-of-the-primary-stability-of-root-analog-zirconia-implants-designed-using-cone-beam-computed-tomography-software-by-means-of-the-periotest%C3%A2-device-an-ex-vivo-study-a-preliminary-report
#4
Jacek Matys, Katarzyna Świder, Rafał Flieger, Marzena Dominiak
BACKGROUND: The implant primary stability is a fundamental prerequisite for a success of osseointegration process which determines the prosthetic reconstruction time. OBJECTIVES: The aim of the present study was to assess the quality and precision of modern conical bone computer tomography (CBCT) software in preparing root analog zirconia implants (RAZIs) by measuring its primary stability by means of the Periotest device. MATERIAL AND METHODS: Thirteen pig jaws with proper erupted first premolar (P1) teeth were used in the study...
August 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29019926/the-effects-of-acid-etching-on-the-nanomorphological-surface-characteristics-and-activation-energy-of-titanium-medical-materials
#5
Kuo-Yung Hung, Yi-Chih Lin, Hui-Ping Feng
The purpose of this study was to characterize the etching mechanism, namely, the etching rate and the activation energy, of a titanium dental implant in concentrated acid and to construct the relation between the activation energy and the nanoscale surface topographies. A commercially-pure titanium (CP Ti) and Ti-6Al-4V ELI surface were tested by shot blasting (pressure, grain size, blasting distance, blasting angle, and time) and acid etching to study its topographical, weight loss, surface roughness, and activation energy...
October 11, 2017: Materials
https://www.readbyqxmd.com/read/29018818/the-mechanical-properties-and-biometrical-effect-of-3d-preformed-titanium-membrane-for-guided-bone-regeneration-on-alveolar-bone-defect
#6
So-Hyoun Lee, Jong-Hoon Moon, Chang-Mo Jeong, Eun-Bin Bae, Chung-Eun Park, Gye-Rok Jeon, Jin-Ju Lee, Young-Chan Jeon, Jung-Bo Huh
The purpose of this study is to evaluate the effect of three-dimensional preformed titanium membrane (3D-PFTM) to enhance mechanical properties and ability of bone regeneration on the peri-implant bone defect. 3D-PFTMs by new mechanically compressive molding technology and manually shaped- (MS-) PFTMs by hand manipulation were applied in artificial peri-implant bone defect model for static compressive load test and cyclic fatigue load test. In 12 implants installed in the mandibular of three beagle dogs, six 3D-PFTMs, and six collagen membranes (CM) randomly were applied to 2...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28899562/the-design-production-and-clinical-application-of-3d-patient-specific-implants-with-drilling-guides-for-acetabular-surgery
#7
B J Merema, J Kraeima, K Ten Duis, K W Wendt, R Warta, E Vos, R H Schepers, M J H Witjes, F F A IJpma
An innovative procedure for the development of 3D patient-specific implants with drilling guides for acetabular fracture surgery is presented. By using CT data and 3D surgical planning software, a virtual model of the fractured pelvis was created. During this process the fracture was virtually reduced. Based on the reduced fracture model, patient-specific titanium plates including polyamide drilling guides were designed, 3D printed and milled for intra-operative use. One of the advantages of this procedure is that the personalised plates could be tailored to both the shape of the pelvis and the type of fracture...
August 30, 2017: Injury
https://www.readbyqxmd.com/read/28892256/possibility-of-quantitative-t2-mapping-mri-of-cartilage-near-metal-in-high-tibial-osteotomy-a-human-cadaver-study
#8
Joost Verschueren, Duncan E Meuffels, Esther E Bron, Stefan Klein, Gert-Jan Kleinrensink, Jan A N Verhaar, Sita M A Bierma-Zeinstra, Gabriel P Krestin, Piotr A Wielopolski, Max Reijman, Edwin H G Oei
T2-mapping is a widely used quantitative MRI technique in osteoarthritis research. An important challenge for its application in the context of high tibial osteotomy (HTO) is the presence of metallic fixation devices. In this study, we evaluated the possibility of performing T2-mapping after a HTO, by assessing the extent of magnetic susceptibility artifacts and the influence on T2 relaxation times caused by two commonly used fixation devices. T2-mapping with a 3D fast spin-echo sequence at 3 Tesla was performed on 11 human cadaveric knee joints before and after implantation of a titanium plate and screws (n = 5) or cobalt chrome staples(n = 6)...
September 11, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28888428/displacement-comparison-of-cad-cam-titanium-and-zirconia-abutments-to-implants-with-different-conical-connections
#9
Burak Yilmaz, Shervin Hashemzadeh, Jeremy D Seidt, Nancy L Clelland
PURPOSE: To compare the displacements of CAD-CAM zirconia and titanium abutments into different internal connection systems after torquing. METHODS: OsseoSpeed EV and OsseoSpeed TX implants (n=10) were placed in resin blocks. Zirconia and titanium abutments (n=5) were first hand tightened and then tightened to the recommended torque (20Ncm for TX and 25Ncm for EV). Displacements of abutments between screw tightening by hand and torque driver was measured using three-dimensional digital image correlation (3D DIC) technique...
September 6, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28884523/response-of-umbilical-cord-mesenchymal-stromal-cells-to-varying-titanium-topographical-signals
#10
Ines Lauria, Miriam Höner, Sebastian Kant, Roswitha Davtalab, Thomas Weik, Katrin Sternberg, Horst Fischer
A wide variety of titanium implant modifications have been developed to improve tissue- or cell-material interactions including bone bonding, implant failure, and contact osteogenesis. Osteogenesis can be stimulated by mechanobiological signals such as topography though translation of in vivo reactions to in vitro bioactivity and stem cell culture data, and vice versa, is challenging. We hypothesized that a systematic in vitro approach comparing clinically well-accepted implant surface topographical modifications could shed light on potential cell biological mechanisms provoked by submicron-, micron- or macrostructured surfaces...
September 7, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28855286/improved-methods-for-acrylic-free-implants-in-non-human-primates-for-neuroscience-research
#11
Jacqueline A Overton, Dylan F Cooke, Adam B Goldring, Steven A Lucero, Conor Weatherford, Gregg H Recanzone
Traditionally, head fixation devices and recording cylinders have been implanted in non-human primates (NHP) using dental acrylic, in spite of several shortcomings associated with acrylic. The use of more biocompatible materials such as titanium and PEEK is becoming more prevalent in NHP research. We describe a cost-effective set of procedures that maximizes the integration of headposts and recording cylinders with the animal's tissues while reducing surgery time. Nine rhesus monkeys were implanted with titanium headposts and one of these was also implanted with a recording chamber...
August 30, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28832345/biomimetic-surface-functionalization-of-clinically-relevant-metals-used-as-orthopaedic-and-dental-implants
#12
Elena García-Gareta, Jia Hua, Alodia Orera, Nupur Kohli, Jonathan C Knowles, Gordon W Blunn
Titanium and its alloys or tantalum (Ta) are materials used in orthopaedic and dental implants due to their excellent mechanical properties and biocompatibility. However, their bioactivity and osteoconductivity is low. With a view to improving these materials bioactivity we hypothesised that the surface of Ta and TiAl6V4 can be functionalised with biomimetic, amorphous nano-sized calcium-phosphate (CaP) apatite-like deposits, instead of creating uniform coatings, which can lead to flaking, delamination and poor adherence...
August 23, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28828975/customized-titanium-mesh-based-on-the-3d-printed-model-vs-manual-intraoperative-bending-of-titanium-mesh-for-reconstructing-of-orbital-bone-fracture-a-randomized-clinical-trial
#13
Shahrokh Raisian, Hamid Reza Fallahi, Kazem S Khiabani, Mehdi Heidarizadeh, Sadaf Azdoo
BACKGROUND: This study was aimed to compare the efficacy of customized patient-specific titanium mesh based on 3D printed model with intra-operative bending of titanium mesh for reconstructing of orbital floor fracture. METHODS: This study was prospectively conducted on 10 patients with unilateral orbital floor fractures caused by accident or falls. In intervention group (n=5), the CT-scan slices were used for generating 3D reconstruction of both affected and unaffected orbits...
August 21, 2017: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/28820570/engineering-of-micro-to-nanostructured-3d-printed-drug-releasing-titanium-implants-for-enhanced-osseointegration-and-localized-delivery-of-anticancer-drugs
#14
Shaheer Maher, Gagandeep Kaur, Luis Lima-Marques, Andreas Evdokiou, Dusan Losic
Primary and secondary bone cancers are major causes of pathological bone fractures which are usually treated through implant fixation and chemotherapy. However, both approaches face many limitations. On one hand, implants may suffer from poor osseointegration, and their rejection results in repeated surgery, patient's suffering, and extensive expenses. On the other hand, there are severe systemic adverse effects of toxic chemotherapeutics which are administrated systemically. In this paper, in order to address these two problems, we present a new type of localized drug-releasing titanium implants with enhanced implants' biointegration and drug release capabilities that could provide a high concentration of anticancer drugs locally to treat bone cancers...
August 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28790331/3d-printed-personalized-titanium-plates-improve-clinical-outcome-in-microwave-ablation-of-bone-tumors-around-the-knee
#15
Limin Ma, Ye Zhou, Ye Zhu, Zefeng Lin, Lingling Chen, Yu Zhang, Hong Xia, Chuanbin Mao
Microwave ablation has been widely accepted in treating bone tumor. However, its procedure is time-consuming and usually results in postoperative fractures. To solve this problem, we designed and fabricated titanium plates customized to the patients' bone structures. The personalized titanium plates were then used for fixation after the removal of tumorous tissue. Specifically, 3D models of tumor-bearing bone segments were constructed by using computed tomography (CT) and magnetic resonance imaging (MRI). The 3D models were used to design the personalized titanium plates...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28765800/fortifying-the-bone-implant-interface-part-2-an-in-vivo-evaluation-of-3d-printed-and-tps-coated-triangular-implants
#16
Regina F MacBarb, Derek P Lindsey, Shane A Woods, Peggy A Lalor, Mukund I Gundanna, Scott A Yerby
BACKGROUND: Minimally invasive surgical fusion of the sacroiliac (SI) joint using machined solid triangular titanium plasma spray (TPS) coated implants has demonstrated positive clinical outcomes in SI joint pain patients. Additive manufactured (AM), i.e. 3D-printed, fenestrated triangular titanium implants with porous surfaces and bioactive agents, such as nanocrystalline hydroxyapatite (HA) or autograft, may further optimize bony fixation and subsequent biomechanical stability. METHODS: A bilateral ovine distal femoral defect model was used to evaluate the cancellous bone-implant interfaces of TPS-coated and AM implants...
2017: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/28765799/fortifying-the-bone-implant-interface-part-1-an-in-vitro-evaluation-of-3d-printed-and-tps-porous-surfaces
#17
Regina F MacBarb, Derek P Lindsey, Chelsea S Bahney, Shane A Woods, Mark L Wolfe, Scott A Yerby
BACKGROUND: An aging society and concomitant rise in the incidence of impaired bone health have led to the need for advanced osteoconductive spinal implant surfaces that promote greater biological fixation (e.g. for interbody fusion cages, sacroiliac joint fusion implants, and artificial disc replacements). Additive manufacturing, i.e. 3D-printing, may improve bone integration by generating biomimetic spinal implant surfaces that mimic bone morphology. Such surfaces may foster an enhanced cellular response compared to traditional implant surfacing processes...
2017: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/28761274/comparative-evaluation-of-bite-force-analytical-study-following-mandibular-osteosysthesis-using-three-dimensional-and-conventional-locking-miniplates
#18
Pallav Kumar Kinra, K Jayakumar, C S Soumithran, Manoj Joseph Michael, Deepak Passi, Mahinder Singh
AIMS AND OBJECTIVES: The aim is to study the effectiveness of 2 mm three-dimensional (3D) titanium miniplates and 2 mm conventional titanium miniplates in osteosynthesis of mandibular fractures by comparing the change in bite force. METHODOLOGY: The study comprised forty patients of age group 20-40 years, weighing 55-75 kg having mandibular fractures. Patients were randomly divided into two equal groups In Group A, twenty patients underwent osteosynthesis using 3D titanium miniplates (2...
January 2017: National Journal of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28746140/are-there-3d-changes-in-spine-and-rod-shape-in-the-2-years-after-adolescent-idiopathic-scoliosis-instrumentation
#19
Franck Le Navéaux, Hubert Labelle, Stefan Parent, Peter O Newton, Carl-Eric Aubin
STUDY DESIGN: Retrospective analysis of spine and rods 3D shape in the 2 years after adolescent idiopathic scoliosis (AIS) posterior surgical instrumentation. OBJECTIVE: To evaluate spine and rod shape 3D changes in the 2 years after AIS instrumentation with different rod materials. SUMMARY OF BACKGROUND DATA: Postoperative loss of correction has been reported with modern segmental instrumentation. The postoperative 3D rod shape changes of different rod materials and their implication in postoperative loss of correction have never been studied...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28736922/effect-of-implantoplasty-on-fracture-resistance-and-surface-roughness-of-standard-diameter-dental-implants
#20
Xavier Costa-Berenguer, Marta García-García, Alba Sánchez-Torres, Mariano Sanz-Alonso, Rui Figueiredo, Eduard Valmaseda-Castellón
OBJECTIVE: To assess the effect of implantoplasty on the fracture resistance, surface roughness, and macroscopic morphology of standard diameter (4.1 mm) external connection dental implants. MATERIALS AND METHODS: An in vitro study was conducted in 20 screw-shaped titanium dental implants with an external connection. In 10 implants, the threads and surface were removed and polished with high-speed burs (implantoplasty), while the remaining 10 implants were used as controls...
July 23, 2017: Clinical Oral Implants Research
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