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https://www.readbyqxmd.com/read/29806410/-application-of-three-dimensional-printing-technology-in-treatment-of-internal-or-external-ankle-distal-avulsed-fracture
#1
Weixiang Shi, Xiaozhong Luo, Gang Wu, Yong Ding, Xin Zhou
Objective: To explore the effectiveness and advantage of three-dimensional (3D) printing technology in treatment of internal or external ankle distal avulsed fracture. Methods: Between January 2015 and January 2017, 20 patients with distal avulsed fracture of internal or external ankle were treated with the 3D guidance of shape-blocking steel plate fixation (group A), and 18 patients were treated with traditional plaster external fixation (group B). There was no significant difference in gender, age, injury cause, disease duration, fracture side, and fracture type between 2 groups ( P >0...
February 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29791698/stryker-orthopaedic-modeling-and-analytics-soma-a-review
#2
Walter Schmidt, Sally LiArno, Anton Khlopas, Andreas Petersik, Michael A Mont
Due to the differences in bone morphology between demographics such as age, gender, body mass index, and ethnicity, the development of orthopaedic implants requires a large number of anatomical data from various patient populations. In an effort to assess these demographic variations, Stryker Orthopaedic Modeling and Analytics (SOMA) has been developed. SOMA is a suite of tools which utilizes a comprehensive database of computed tomography scans (CT-scans), plus associated three-dimensional (3D) bone models, allowing the user to assess population differences in bone morphology, bone density, and implant fit for the purposes of research and development...
June 1, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29781288/is-computerised-3d-templating-more-accurate-than-2d-templating-to-predict-size-of-components-in-primary-total-hip-arthroplasty
#3
Erik Schiffner, David Latz, Pascal Jungbluth, Jan P Grassmann, Stephan Tanner, Alfred Karbowski, Joachim Windolf, Johannes Schneppendahl
INTRODUCTION: The aim of this study was to compare the accuracy of preoperative templating in total hip arthroplasty (THA) using conventional 2-dimensional (2D) and computed tomography (CT)-based 3-dimensional (3D) measures. METHODS: One hundred and sixteen consecutive primary THAs were analysed. The preoperative diagnosis was primary osteoarthritis in all cases. The 2D templating and the 3D templating were performed by two different residents. All templating results were available for the orthopaedic surgeon performing the procedure...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29762285/cone-beam-computed-tomography-guided-navigation-in-complex-osteotomies-improves-accuracy-at-all-competence-levels-a-study-assessing-accuracy-and-reproducibility-of-joint-sparing-bone-cuts
#4
Amir Sternheim, Aidin Kashigar, Michael Daly, Harley Chan, Jimmy Qiu, Robert Weersink, David Jaffray, Jonathan C Irish, Peter C Ferguson, Jay S Wunder
BACKGROUND: The objective of this study was to assess the accuracy and reproducibility of a novel cone-beam computed tomography (CBCT)-guided navigation system designed for osteotomies with joint-sparing bone cuts. METHODS: Eighteen surgeons participated in this study. First, 3 expert tumor surgeons resected bone tumors in 3 Sawbones tumor models identical to actual patient scenarios. They first performed these osteotomies without navigation and then performed them using a navigation system and 3-dimensional (3D) planning tools based on CBCT imaging...
May 16, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29730456/outcome-and-safety-analysis-of-3d-printed-patient-specific-pedicle-screw-jigs-for-complex-spinal-deformities-a-comparative-study
#5
Bhavuk Garg, Manish Gupta, Menaka Singh, Dinesh Kalyanasundaram
BACKGROUND CONTEXT: Spinal deformities are very challenging to treat and have a great risk of neurological complications due to hardware placement during corrective surgery. Various techniques have been introduced to ensure safe and accurate placement of pedicle screws. Patient-specific screw guides with pre-drawn and pre-validated trajectory seems to be an attractive option. PURPOSE: We have focused on developing 3D printing technique for complex spinal deformities in India...
May 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29730221/three-dimensional-magnetic-resonance-imaging-of-the-anterolateral-ligament-of-the-knee-an-evaluation-of-intact-and-anterior-cruciate-ligament-deficient-knees-from-the-scientific-anterior-cruciate-ligament-network-international-santi-study-group
#6
Koichi Muramatsu, Adnan Saithna, Hiroki Watanabe, Kana Sasaki, Kenta Yokosawa, Yudo Hachiya, Tatsuo Banno, Camilo Partezani Helito, Bertrand Sonnery-Cottet
PURPOSE: To determine the visualization rate of the anterolateral ligament (ALL) in uninjured and anterior cruciate ligament (ACL)-deficient knees using 3-dimensional (3D) magnetic resonance imaging (MRI) and to characterize the spectrum of ALL injury observed in ACL-deficient knees, as well as determine the interobserver and intraobserver reliability of a 3D MRI classification of ALL injury. METHODS: A total of 100 knees (60 ACL deficient and 40 uninjured) underwent 3D MRI...
May 2, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29725736/conventional-plate-fixation-method-versus-pre-operative-virtual-simulation-and-three-dimensional-printing-assisted-contoured-plate-fixation-method-in-the-treatment-of-anterior-pelvic-ring-fracture
#7
Chun-Chi Hung, Yuan-Ta Li, Yu-Ching Chou, Jia-En Chen, Chia-Chun Wu, Hsain-Chung Shen, Tsu-Te Yeh
PURPOSE: Treating pelvic fractures remains a challenging task for orthopaedic surgeons. We aimed to evaluate the feasibility, accuracy, and effectiveness of three-dimensional (3D) printing technology and computer-assisted virtual surgery for pre-operative planning in anterior ring fractures of the pelvis. We hypothesized that using 3D printing models would reduce operation time and significantly improve the surgical outcomes of pelvic fracture repair. METHODS: We retrospectively reviewed the records of 30 patients with pelvic fractures treated by anterior pelvic fixation with locking plates (14 patients, conventional locking plate fixation; 16 patients, pre-operative virtual simulation with 3D, printing-assisted, pre-contoured, locking plate fixation)...
May 3, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29662766/clinical-validation-of-a-body-fixed-3d-accelerometer-and-algorithm-for-activity-monitoring-in-orthopaedic-patients
#8
Matthijs Lipperts, Simon van Laarhoven, Rachel Senden, Ide Heyligers, Bernd Grimm
Background/Objective: Activity is increasingly being recognized as a highly relevant parameter in all areas of healthcare for diagnosis, treatment, or outcome assessment, especially in orthopaedics where the movement apparatus is directly affected. Therefore, the aim of this study was to develop, describe, and clinically validate a generic activity-monitoring algorithm, satisfying a combination of three criteria. The algorithm must be able to identify, count, and time a large set of relevant daily activities...
October 2017: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29648876/use-of-patient-specific-3d-printed-titanium-implants-for-complex-foot-and-ankle-limb-salvage-deformity-correction-and-arthrodesis-procedures
#9
Travis J Dekker, John R Steele, Andrew E Federer, Kamran S Hamid, Samuel B Adams
BACKGROUND: The advancement of 3D printing technology has allowed for the use of custom-designed implants for difficult-to-treat foot and ankle pathologies. This study reports on the radiographic and functional outcomes of a case series of patients treated with patient-specific 3D-printed titanium implants. METHODS: Fifteen consecutive patients treated with custom-designed 3D-printed implant cages for severe bone loss, deformity correction, and/or arthrodesis procedures were included in this study...
April 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29629583/additive-manufacturing
#10
REVIEW
A Mumith, M Thomas, Z Shah, M Coathup, G Blunn
Increasing innovation in rapid prototyping (RP) and additive manufacturing (AM), also known as 3D printing, is bringing about major changes in translational surgical research. This review describes the current position in the use of additive manufacturing in orthopaedic surgery. Cite this article: Bone Joint J 2018;100-B:455-60.
April 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29628133/radiostereometric-analysis-using-clinical-radiographic-views-development-of-a-universal-calibration-object
#11
Jordan S Broberg, Xunhua Yuan, Matthew G Teeter
Radiostereometric analysis (RSA) is a highly accurate technique used to provide three-dimensional (3D) measurements of orthopaedic implant migration for clinical research applications, yet its implementation in routine clinical examinations has been limited. Previous studies have introduced a modified RSA procedure that separates the calibration examinations from the patient examinations, allowing routine clinical radiographs to be analyzed using RSA. However, in order to calibrate the wide range of clinical views, a new calibration object is required...
May 17, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29589954/validation-of-an-mri-protocol-for-routine-quantitative-assessment-of-tunnel-position-in-anterior-cruciate-ligament-reconstruction
#12
Samuel Grasso, James Linklater, Qing Li, David A Parker
BACKGROUND: No standardized methodology and objective criteria currently exist to accurately and objectively assess tunnel placement and consequent graft orientation in anterior cruciate ligament (ACL) reconstruction (ACLR) through a single imaging modality. Advances in magnetic resonance imaging (MRI) technology have enabled the use of volumetric high spatial and contrast resolution proton density-weighted sequencing, which allows precise delineation of graft orientation, tunnel position, and quantitative assessment of tunnel position relationship to adjacent reproducible anatomic landmarks...
March 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29582942/-fluoroscopic-based-navigation-in-orthopaedic-trauma-a-review-of-a-large-center-s-experience
#13
Yoram A Weil, Meir Liebergall, Rami Mosheiff, Amal Khoury
INTRODUCTION: Computer Assisted Orthopaedic Surgery (CAOS) was introduced in the late 1990's and early 2000's. Since then its application in orthopaedic trauma has been utilized mainly as augmented fluoroscopy for intraoperative navigation. From 2010 our center implemented an advanced system allowing further expansion of this technology. AIMS: The aim of this study was to describe the experience with an advanced fluoroscopic based CAOS system in our center. METHODS: The BrainLabTM Trauma 3...
March 2018: Harefuah
https://www.readbyqxmd.com/read/29567105/proximal-and-distal-alignment-of-normal-canine-femurs-a-morphometric-analysis
#14
Mehmet Erkut Kara, Figen Sevil-Kilimci, Ömer Gürkan Dilek, Vedat Onar
Many researchers are interested in femoral conformation because most orthopaedic problems of the long bones occur in the femur and its joints. The neck-shaft (NSA) and the anteversion (AVA) angles are good predictors for understanding the orientation of the proximal end of the femur. The varus (aLDFA) and procurvatum (CDFA) angles have also been used to understand the orientation of the distal end of the femur. The purposes of this study were to investigate the relationship between the proximal and distal angles of the femur and to compare the distal femoral angles in male and female dogs in order to investigate the sexual dimorphism...
May 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29563069/biological-evaluation-and-finite-element-modeling-of-porous-poly-para-phenylene-for-orthopaedic-implants
#15
Hyunhee Ahn, Ravi R Patel, Anthony J Hoyt, Angela S P Lin, F Brennan Torstrick, Robert E Guldberg, Carl P Frick, R Dana Carpenter, Christopher M Yakacki, Nick J Willett
Poly(para-phenylene) (PPP) is a novel aromatic polymer with higher strength and stiffness than polyetheretherketone (PEEK), the gold standard material for polymeric load-bearing orthopaedic implants. The amorphous structure of PPP makes it relatively straightforward to manufacture different architectures, while maintaining mechanical properties. PPP is promising as a potential orthopaedic material; however, the biocompatibility and osseointegration have not been well investigated. The objective of this study was to evaluate biological and mechanical behavior of PPP, with or without porosity, in comparison to PEEK...
May 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29547501/which-classification-system-is-most-useful-for-classifying-osteonecrosis-of-the-femoral-head
#16
Kazuma Takashima, Takashi Sakai, Hidetoshi Hamada, Masaki Takao, Nobuhiko Sugano
BACKGROUND: Many studies have confirmed that the size and location of necrotic lesions are major factors that affect the prevalence of collapse and prognosis in patients with osteonecrosis of the femoral head (ONFH). Although several classification systems categorize and quantify ONFH, there is no agreement on which one is most useful for the purpose. QUESTIONS/PURPOSES: We compared the Steinberg, modified Kerboul, and Japanese Investigation Committee (JIC) classifications of ONFH in terms of (1) the correlation among the three different classification systems...
June 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29503698/a-review-of-current-clinical-applications-of-three-dimensional-printing-in-spine-surgery
#17
REVIEW
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
https://www.readbyqxmd.com/read/29470416/carbon-fibre-reinforced-sic-composite-c-sisic-as-an-alternative-material-for-endoprosthesis-fabrication-mechanical-and-in-vitro-biological-properties
#18
Aline Reichert, Michael Seidenstuecker, Rainer Gadow, Hermann O Mayr, Norbert P Suedkamp, Sergio H Latorre, Partick Weichand, Anke Bernstein
Particle-induced periprosthetic osteolysis and subsequent aseptic implant loosening are a major cause of compromising the long-term results of total joint replacements. To date, no implant has been able to mirror radically the tribological factors (friction/lubrication/wear) of in vivo tribological pairings. Carbon-Fibre Reinforced SiC-Composites (C/SiSiC), a material primarily developed for brake technology, has the opportunity to fulfil this requirement. Until now, the material itself has not been used in medicine...
February 22, 2018: Materials
https://www.readbyqxmd.com/read/29441429/three-dimensional-printing-improves-osteochondral-allograft-placement-in-complex-cases
#19
Kelechi R Okoroha, Timothy J Evans, Jeffrey P Stephens, Eric C Makhni, Vasilios Moutzouros
The use of three-dimensional (3D) printing has seen a vast expansion over recent years, with an increased application for its use in orthopaedics. This report details the use of 3D printing technology to aid in the treatment of a medial femoral condyle osteochondral defect in a 26-year-old female who had previously undergone a failed autograft procedure. A preoperative computed tomography scan of the knee and chondral defect was used to generate a 3D printed, one-to-one scale replica of the distal femur. This replica was then used to size a patient-specific allograft plug for the osteochondral transplantation procedure...
February 13, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29414477/effect-of-porous-orthopaedic-implant-material-and-structure-on-load-sharing-with-simulated-bone-ingrowth-a-finite-element-analysis-comparing-titanium-and-peek
#20
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
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