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https://www.readbyqxmd.com/read/28895433/corrective-osteotomies-of-phalangeal-and-metacarpal-malunions-using-patient-specific-guides-ct-based-evaluation-of-the-reduction-accuracy
#1
Stefanie Hirsiger, Andreas Schweizer, Junichi Miyake, Ladislav Nagy, Philipp Fürnstahl
BACKGROUND: Surgical planning of corrective osteotomies is traditionally based on conventional radiographs and clinical findings. In the past 10 years, 3-dimensional (3D) preoperative planning approaches with patient-specific guides have been developed. However, the application of this technology to posttraumatic deformities of the metacarpals and phalangeal bones has not yet been investigated. Our goal was to evaluate the feasibility of the surgical application to the latter and to evaluate the extent and precision of correction...
September 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28863884/how-accurate-are-implant-surgical-guides-produced-with-desktop-stereolithographic-3-dimentional-printers
#2
George R Deeb, Riley K Allen, V Patrick Hall, Daniel Whitley, Daniel M Laskin, Sompop Bencharit
PURPOSE: The use of tooth-supported static stereolithographic guides has greatly improved the ability to ideally place implants. This study was designed to determine the accuracy of in office-printed implant surgical guides. MATERIALS AND METHODS: Using 3shape Implant Studio, a treatment plan for implant placement for tooth 8 was developed using a digital intraoral scan from a Trios scanner and cone-beam computed tomography. Ten stereolithographic guides were printed using a Form2 3-dimensional printer...
August 5, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28861924/highly-concentrated-ultrathin-nickel-hydroxide-nanosheet-ink-for-wearable-energy-storage-devices
#3
Peipei Shi, Rong Chen, Li Hua, Li Li, Ruyi Chen, Yujiao Gong, Chenyang Yu, Jinyuan Zhou, Bin Liu, Gengzhi Sun, Wei Huang
Solution-based techniques are considered as a promising strategy for scalable fabrication of flexible electronics owing to their low-cost and high processing speed. The key to the success of these techniques is dominated by the ink formulation of active nanomaterials. This work successfully prepares a highly concentrated two dimensional (2D) crystal ink comprised of ultrathin nickel hydroxide (Ni(OH)2 ) nanosheets with an average lateral size of 34 nm. The maximum concentration of Ni(OH)2 nanosheets in water without adding any additives reaches as high as 50 mg mL(-1) , which can be printed on arbitrary substrates to form Ni(OH)2 thin films...
September 1, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28838835/biomechanical-evaluation-of-a-novel-hybrid-reconstruction-plate-for-mandible-segmental-defects-a-finite-element-analysis-and-fatigue-testing
#4
Cheng-Hsien Wu, Yang-Sung Lin, Yu-Shen Liu, Chun-Li Lin
PURPOSE: This study develops a novel hybrid (NH) reconstruction plate that can provide load-bearing strength, secure the bone transplant at the prosthesis favored position, and also maintain the facial contour in a mandibular segmental defect. A new patient-match bending technique which uses a three-dimensional printing (3DP) stamping process is developed to increase the interfacial fit between the reconstruction plate and mandibular bone. MATERIALS AND METHODS: The NH reconstruction plate was designed to produce a continuous profile with non-uniform thickness and triangular cross-screw patterns with a locking-screw feature at the plate base...
July 27, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28822675/precise-osteotomies-for-mandibular-distraction-in-infants-with-robin-sequence-using-virtual-surgical-planning
#5
C M Resnick
Mandibular distraction osteogenesis (MDO) has become the first-line operation in many centers for the management of obstructive sleep apnea (OSA) in infants with (Pierre) Robin sequence (RS) not relieved by non-surgical approaches. Preoperative virtual surgical planning (VSP) may improve precision and decrease complications for this operation. This article reports a retrospective study of RS infants who underwent MDO for OSA using preoperative VSP and three-dimensionally printed cutting guides performed by one surgeon...
August 16, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28796182/fabrication-and-characterization-of-3d-printed-highly-porous-3d-lifepo%C3%A2-electrodes-by-low-temperature-direct-writing-process
#6
Changyong Liu, Xingxing Cheng, Bohan Li, Zhangwei Chen, Shengli Mi, Changshi Lao
LiFePO₄ (LFP) is a promising cathode material for lithium-ion batteries. In this study, low temperature direct writing (LTDW)-based 3D printing was used to fabricate three-dimensional (3D) LFP electrodes for the first time. LFP inks were deposited into a low temperature chamber and solidified to maintain the shape and mechanical integrity of the printed features. The printed LFP electrodes were then freeze-dried to remove the solvents so that highly-porous architectures in the electrodes were obtained. LFP inks capable of freezing at low temperature was developed by adding 1,4 dioxane as a freezing agent...
August 10, 2017: Materials
https://www.readbyqxmd.com/read/28783323/3d-printed-electrodes-for-detection-of-nitroaromatic-explosives-and-nerve-agents
#7
Cavin Tan, Muhammad Zafir Mohamad Nasir, Adriano Ambrosi, Martin Pumera
Three-dimensional (3D) printing has proven to be a versatile and useful technology for specialized applications in industry and also for scientific research. We demonstrate its potential use toward the electrochemical detection of nitroaromatic compounds 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), and fenitrothion (FT). The detection of these compounds is of utmost importance in military and forensic applications. Stainless steel electrodes were fabricated by 3D printing, and the surface was electroplated with gold...
September 5, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28772780/comparative-efficacies-of-collagen-based-3d-printed-pcl-plga-%C3%AE-tcp-composite-block-bone-grafts-and-biphasic-calcium-phosphate-bone-substitute-for-bone-regeneration
#8
Kyoung-Sub Hwang, Jae-Won Choi, Jae-Hun Kim, Ho Yun Chung, Songwan Jin, Jin-Hyung Shim, Won-Soo Yun, Chang-Mo Jeong, Jung-Bo Huh
The purpose of this study was to compare bone regeneration and space maintaining ability of three-dimensional (3D) printed bone grafts with conventional biphasic calcium phosphate (BCP). After mixing polycaprolactone (PCL), poly (lactic-co-glycolic acid) (PLGA), and β-tricalcium phosphate (β-TCP) in a 4:4:2 ratio, PCL/PLGA/β-TCP particulate bone grafts were fabricated using 3D printing technology. Fabricated particulate bone grafts were mixed with atelocollagen to produce collagen-based PCL/PLGA/β-TCP composite block bone grafts...
April 17, 2017: Materials
https://www.readbyqxmd.com/read/28766199/a-patient-specific-3d-printed-form-accurately-transfers-supine-mri-derived-tumor-localization-information-to-guide-breast-conserving-surgery
#9
Richard J Barth, Venkataramanan Krishnaswamy, Keith D Paulsen, Timothy B Rooney, Wendy A Wells, Elizabeth Rizzo, Christina V Angeles, Jonathan D Marotti, Rebecca A Zuurbier, Candice C Black
BACKGROUND: Wire-localized excision of nonpalpable breast cancer is imprecise, resulting in positive margins 25-30% of the time. METHODS: Patients underwent preoperative supine magnetic resonance imaging (MRI). A radiologist outlined the tumor edges on consecutive images, creating a three-dimensional (3D) view of its location. Using 3D printing, a bra-like plastic form (the Breast Cancer Locator [BCL]) was fabricated, with features that allowed a surgeon to (1) mark the edges of the tumor on the breast surface; (2) inject blue dye into the breast 1 cm from the tumor edges; and (3) place a wire in the tumor at the time of surgery...
August 1, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28756962/evaluation-of-different-techniques-for-filling-simulated-c-shaped-canals-of-3-dimensional-printed-resin-teeth
#10
Tuba Gok, Ismail Davut Capar, Ilgin Akcay, Ali Keles
INTRODUCTION: The purpose of this study was to compare the ability of different root canal filling methods on the C1 root canal anatomy using 3-dimensional (3D) printer technology. METHODS: Mandibular molars were scanned with cone-beam computed tomographic (CBCT) imaging. A mandibular molar tooth with a C1 root canal configuration was selected according to images obtained from CBCT technology. The root canals were shaped with ProTaper Universal rotary instruments (Dentsply Maillefer, Ballaigues, Switzerland) and hand files...
July 27, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28753252/utility-and-reproducibility-of-3-dimensional-printed-models-in-pre-operative-planning-of-complex-thoracic-tumors
#11
Elizabeth George, Maria Barile, Anji Tang, Ory Wiesel, Antonio Coppolino, Andreas Giannopoulos, Steven Mentzer, Michael Jaklitsch, Andetta Hunsaker, Dimitrios Mitsouras
BACKGROUND AND OBJECTIVES: 3D-printed models are increasingly used for surgical planning. We assessed the utility, accuracy, and reproducibility of 3D printing to assist visualization of complex thoracic tumors for surgical planning. METHODS: Models were created from pre-operative images for three patients using a standard radiology 3D workstation. Operating surgeons assessed model utility using the Gillespie scale (1 = inferior to 4 = superior), and accuracy compared to intraoperative findings...
September 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28753247/take-away-body-parts-an-investigation-into-the-use-of-3d-printed-anatomical-models-in-undergraduate-anatomy-education
#12
Claire F Smith, Nicholas Tollemache, Derek Covill, Malcolm Johnston
Understanding the three-dimensional (3D) nature of the human form is imperative for effective medical practice and the emergence of 3D printing creates numerous opportunities to enhance aspects of medical and healthcare training. A recently deceased, un-embalmed donor was scanned through high-resolution computed tomography. The scan data underwent segmentation and post-processing and a range of 3D-printed anatomical models were produced. A four-stage mixed-methods study was conducted to evaluate the educational value of the models in a medical program...
July 28, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28742761/preparation-and-assessment-of-an-individualized-navigation-template-for-lower-cervical-anterior-transpedicular-screw-insertion-using-a-three-dimensional-printing-technique
#13
FengNing Li, Xuan Huang, Kun Wang, BeiEr Luo, Fan Zhang, Zhi Chen, Quan Li, YongJin Zhang, Ke Qi, ChengChun Jin, WangShenJie Chen, CangLong Hou, HongXing Shen
STUDY DESIGN: Prospective trial. OBJECTIVE: To establish an individualized navigation template for safe and accurate insertion of lower cervical anterior transpedicular screw (ATPS) based on a three-dimensional (3D) printing technique. SUMMARY OF BACKGROUND DATA: Conventional screw insertion manually under fluoroscopy easily leading to deviation of ATPS screw channel, cervical instrumentation procedures demand the need for a precise technique for screw placement...
July 24, 2017: Spine
https://www.readbyqxmd.com/read/28731812/3d-printed-visceral-aneurysm-models-based-on-ct-data-for-simulations-of-endovascular-embolization-evaluation-of-size-and-shape-accuracy
#14
Eisuke Shibata, Hidemasa Takao, Shiori Amemiya, Kuni Ohtomo
OBJECTIVE: The objective of this study is to verify the accuracy of 3D-printed hollow models of visceral aneurysms created from CT angiography (CTA) data, by evaluating the sizes and shapes of aneurysms and related arteries. SUBJECTS AND METHODS: From March 2006 to August 2015, 19 true visceral aneurysms were embolized via interventional radiologic treatment provided by the radiology department at our institution; aneurysms with bleeding (n = 3) or without thin-slice (< 1 mm) preembolization CT data (n = 1) were excluded...
August 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28713738/three-dimensional-planning-and-reconstruction-of-the-mandible-in-children-with-craniofacial-microsomia-type-iii-using-costochondral-grafts
#15
Omri Emodi, Yair Israel, Michal Even Almos, Dror Aizenbud, John A Van Aalst, Adi Rachmiel
BACKGROUND: In craniofacial microsomia (CFM) Type III patients, autogenous costochondral grafts (CCG) are conventionally used for the reconstruction of the ramus and condyle. The aim of this study was to describe the use of CCG in children with CFM in terms of outcomes, growth patterns, and complications. MATERIALS AND METHODS: This is a retrospective study of nine, aged 4-12 years, patients with CFM Type III, who underwent reconstruction of the mandibular ramus condyle unit by CCG...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28709790/corrective-osteotomy-for-malunited-diaphyseal-forearm-fractures-using-preoperative-3-dimensional-planning-and-patient-specific-surgical-guides-and-implants
#16
Ann-Maria Byrne, Bianca Impelmans, Veronique Bertrand, Annemieke Van Haver, Frederik Verstreken
PURPOSE: Three-dimensional planning based on computed tomography images of the malunited and the mirrored contralateral forearm allows preoperative simulations of corrective osteotomies, the fabrication of patient-specific osteotomy guides, and custom-made 3-dimensional printed titanium plates. This study aims to assess the precision and clinical outcome of this technique. METHODS: This was a prospective pilot study with 5 consecutive patients. The mean age at initial injury was 11 years (range, 4-16 years), and the mean interval from the time of injury to the time of corrective surgery was 32 months (range, 7-107 months)...
July 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28699346/probing-the-morphology-and-evolving-dynamics-of-3d-printed-nanostructures-using-high-speed-atomic-force-microscopy
#17
Chen Yang, Robert Winkler, Maja Dukic, Jie Zhao, Harald Plank, Georg E Fantner
Focused electron beam induced deposition (FEBID) has been demonstrated as a promising solution for synthesizing truly three-dimensional (3D) nanostructures. However, the lack of morphological feedback during growth complicates further development toward higher spatial fabrication precision. Here, we show that by combining in situ high speed atomic force microscopy (HS-AFM) with FEBID, morphologies in multistep fabrication process can be accessed. More importantly, the proposed method enables simultaneous imaging and fabrication operation, which opens new possibilities to investigate evolving mechanical properties of the deposit...
July 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28692522/reconstructive-operation-of-nonsyndromic-multiple-suture-craniosynostosis-based-on-precise-virtual-plan-and-prefabricated-template
#18
Jian Ni, Bin Yang, Binghang Li
This report presents a case of a 4-year-old girl suffering from multiple-suture nonsyndromic craniosynostosis. The patient is characterized with fronto-orbital malformation and poor visual acuity. The preoperational three-dimensional computed tomography scan showed premature closure of the sagittal suture, bilateral coronal, and lambdoidal suture. The virtual surgical planning was performed before operation for the reposition of bone segments and communication with the patient's family. The navigational plate for reshaping was made based on the surgical plan with three-dimensional printed model...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28688825/three-dimensional-bio-printed-scaffold-sleeves-with-mesenchymal-stem-cells-for-enhancement-of-tendon-to-bone-healing-in-anterior-cruciate-ligament-reconstruction-using-soft-tissue-tendon-graft
#19
Sin Hyung Park, Yeong-Jin Choi, Sang Won Moon, Byung Hoon Lee, Jin-Hyung Shim, Dong-Woo Cho, Joon Ho Wang
PURPOSE: To investigate the efficacy of the insertion of 3-dimensional (3D) bio-printed scaffold sleeves seeded with mesenchymal stem cells (MSCs) to enhance osteointegration between the tendon and tunnel bone in anterior cruciate ligament (ACL) reconstruction in a rabbit model. METHODS: Scaffold sleeves were fabricated by 3D bio-printing. Before ACL reconstruction, MSCs were seeded into the scaffold sleeves. ACL reconstruction with hamstring tendon was performed on both legs of 15 adult rabbits (aged 12 weeks)...
July 5, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28688157/the-application-of-3-dimensional-printing-for-preoperative-planning-in-oral-and-maxillofacial-surgery-in-dogs-and-cats
#20
Jenna N Winer, Frank J M Verstraete, Derek D Cissell, Steven Lucero, Kyriacos A Athanasiou, Boaz Arzi
OBJECTIVE: To describe the application of 3-dimensional (3D) printing in advanced oral and maxillofacial surgery (OMFS) and to discuss the benefits of this modality in surgical planning, student and resident training, and client education. STUDY DESIGN: Retrospective case series. ANIMALS: Client-owned dogs (n = 28) and cats (n = 4) with 3D printing models of the skulls. METHODS: The medical records of 32 cases with 3D printing prior to major OMFS were reviewed...
July 8, 2017: Veterinary Surgery: VS
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