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https://www.readbyqxmd.com/read/27913755/applications-of-three-dimensional-printing-in-surgery
#1
REVIEW
Chi Li, Tsz Fung Cheung, Vei Chen Fan, Kin Man Sin, Chrisity Wai Yan Wong, Gilberto Ka Kit Leung
Three-dimensional (3D) printing is a rapidly advancing technology in the field of surgery. This article reviews its contemporary applications in 3 aspects of surgery, namely, surgical planning, implants and prostheses, and education and training. Three-dimensional printing technology can contribute to surgical planning by depicting precise personalized anatomy and thus a potential improvement in surgical outcome. For implants and prosthesis, the technology might overcome the limitations of conventional methods such as visual discrepancy from the recipient's body and unmatching anatomy...
December 2, 2016: Surgical Innovation
https://www.readbyqxmd.com/read/27906843/comparison-of-resorbable-plating-systems-complications-during-degradation
#2
Dennis C Nguyen, Albert S Woo, Scott J Farber, Gary B Skolnick, Jenny Yu, Sybill D Naidoo, Kamlesh B Patel
INTRODUCTION: Several bioresorbable plating systems have become standard in pediatric craniosynostosis reconstruction. A comparison of these systems is needed to aid surgeons in the preoperative planning process. The authors aim to evaluate 1 institution's experience using Resorb-X by KLS Martin and Delta Resorbable Fixation System by Stryker (Stryker Craniomaxillofacial, Kalamazoo, MI). METHODS: A sample of patients with single-suture nonsyndromic craniosynostosis treated at St Louis Children's Hospital between 2007 and 2014 using either Resorb-X or Delta bioresorbable plating systems were reviewed...
November 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27906812/effect-of-cyclopentolate-on-in-vivo-schlemm-canal-microarchitecture-in-healthy-subjects
#3
Michael S Rosman, Alon Skaat, Jason L Chien, Mark P Ghassibi, Tarela F Sarimiye, Robert Ritch, Jeffrey M Liebmann, Sung Chul Park
PURPOSE: To characterize the in vivo effect of cyclopentolate on the microstructure of Schlemm canal (SC) in healthy eyes. METHODS: For healthy subjects, 81 serial horizontal enhanced depth imaging optical coherence tomography B-scans (interval between scans, ∼35 μm) of the nasal corneoscleral limbal area were obtained before and 1 hour after cyclopentolate 1% administration in 1 eye. The structures of aqueous and blood vessels in each scan were used as landmarks to select 50 overlapping scans between the 2 sets of 81 serial scans (before and after cyclopentolate administration)...
November 30, 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/27906392/multiscale-directed-self-assembly-of-composite-microgels-in-complex-electric-fields
#4
Jérôme J Crassous, Ahmet F Demirörs
This study explored the application of localized electric fields for reversible directed self-assembly of colloidal particles in 3 dimensions. Electric field microgradients, arising from the use of micro-patterned electrodes, were utilized to direct the localization and self-assembly of polarizable (charged) particles resulting from a combination of dielectrophoretic and multipolar forces. Deionized dispersions of spherical and ellipsoidal core-shell microgels were employed for investigating their assembly under an external alternating electric field...
July 5, 2016: Soft Matter
https://www.readbyqxmd.com/read/27906223/axial-super-resolution-evanescent-wave-tomography
#5
Sarang Pendharker, Swapnali Shende, Ward Newman, Stephen Ogg, Neda Nazemifard, Zubin Jacob
Optical tomographic reconstruction of a three-dimensional (3D) nanoscale specimen is hindered by the axial diffraction limit, which is 2-3 times worse than the focal plane resolution. We propose and experimentally demonstrate an axial super-resolution evanescent wave tomography method that enables the use of regular evanescent wave microscopes like the total internal reflection fluorescence microscope beyond surface imaging and achieve a tomographic reconstruction with axial super-resolution. Our proposed method based on Fourier reconstruction achieves axial super-resolution by extracting information from multiple sets of 3D fluorescence images when the sample is illuminated by an evanescent wave...
December 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27903466/preoperative-3-dimensional-magnetic-resonance-imaging-of-uterine-myoma-and-endometrium-prior-to-myomectomy
#6
Young Jae Kim, Kwang Gi Kim, Seung Hyun Lee, Byung Chul Kang, Sa Ra Lee
Uterine myomas are the most common gynecologic benign tumor affecting women of childbearing age, and myomectomy is the main surgical option to preserve the uterus and fertility. During myomectomy for women with multiple myomas, it is advisable to identify and remove as many as possible to decrease the risk of future myomectomies. With deficient preoperative imaging, gynecologists are challenged to identify the location and size of myomas and the endometrium, which in turn can lead to uterine rupture during future pregnancies...
November 26, 2016: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/27890231/soft-tissue-regeneration-incorporating-3-dimensional-biomimetic-scaffolds
#7
REVIEW
Gaurav Shah, Bernard J Costello
Soft tissue replacement and repair is crucial to the ever-developing field of reconstructive surgery as trauma, pathology, and congenital deficits cannot be adequately restored if soft tissue regeneration is deficient. Predominant approaches were sometimes limited to harvesting autografts, but through regenerative medicine and tissue engineering, the hope of fabricating custom constructs is now a feasible and fast-approaching reality. The breadth of this field includes tissues ranging from skin, mucosa, muscle, and fat and hopes to not only provide construct to replace a tissue but also to replace its function...
February 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/27888604/mri-depiction-and-3d-visualization-of-three-anterior-cruciate-ligament-bundles
#8
H Otsubo, Y Akatsuka, H Takashima, T Suzuki, D Suzuki, T Kamiya, Y Ikeda, T Matsumura, T Yamashita, K Shino
The anterior cruciate ligament (ACL) is divided into three fiber bundles (AM-M: anteromedial-medial, AM-L: anteromedial-lateral, PL: posterolateral). We attempted to depict the three bundles of the human ACL on MRI images and to obtain 3-dimensional visualization of them. Twenty-four knees of healthy volunteers (14 males, 10 females) were scanned by 3T-MRI using the fat suppression 3D coherent oscillatory state acquisition for the manipulation of imaging contrast (FS 3D-COSMIC). The scanned images were reconstructed after the isotropic voxel data, which allows the images to be reconstructed in any plane, was acquired...
November 26, 2016: Clinical Anatomy
https://www.readbyqxmd.com/read/27885641/apophyseal-ossification-of-the-iliac-crest-in-forensic-age-estimation-computed-tomography-standards-for-modern-australian-subadults
#9
Nicolene Lottering, Clair L Alston-Knox, Donna M MacGregor, Maree T Izatt, Caroline A Grant, Clayton J Adam, Laura S Gregory
This study contrasts the ontogeny of the iliac crest apophysis using conventional radiography and multislice computed tomography (MSCT), providing probabilistic information for age estimation of modern Australian subadults. Retrospective abdominopelvic MSCT data acquired from 524 Australian individuals aged 7-25 and surveillance radiographs of adolescent idiopathic scoliosis patients included in the Paediatric Spine Research Group Progression Study (n = 531) were assessed. Ossification scoring of pseudo-radiographs and three-dimensional (3D) volume-rendered reconstructions using Risser (1958) quantitative descriptors indicate discrepancies in age estimates, stage allocation, and conflicting morphological progression...
November 25, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27879528/low-tube-voltage-computed-tomography-during-hepatic-arterial-phase-the-effect-of-body-habitus-on-image-quality
#10
Yang Shin Park, Chang Hee Lee, Jongmee Lee, Jae Woong Choi, Kyeong Ah Kim, Cheol Min Park
PURPOSE: This study aimed to evaluate the impact of body habitus factors on image quality of low-tube voltage computed tomography (CT) during the hepatic arterial phase. MATERIALS AND METHODS: Ninety-seven patients (66 men, 31 women; age range, 26-78 years) who underwent clinically indicated liver dynamic CT examination were enrolled in the study. Analysis with 80-kVp CT and intermediate tube current (277-337 mA) was performed in the late hepatic arterial phase using a 320-detector row scanner with adaptive iterative dose reduction 3-dimensional reconstruction...
November 23, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27872989/is-the-contralateral-tibia-a-reliable-template-for-reconstruction-a-three-dimensional-anatomy-cadaveric-study
#11
Pascal Schenk, Lazaros Vlachopoulos, Andreas Hingsammer, Sandro F Fucentese, Philipp Fürnstahl
PURPOSE: The contralateral anatomy is regularly used as a reconstruction template for corrective osteotomies of several deformities and pathological conditions. However, there is lack of evidence that the intra-individual differences between both tibiae are sufficiently small to use the contralateral tibia as a 3D reconstruction template for complex osteotomies. The aim of this study was to evaluate the intra-individual side differences of the tibia in length, torsion, angulation, and translation using 3D measurement techniques...
November 21, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27872014/the-bone-implant-interface-of-dental-implants-in-humans-on-the-atomic-scale
#12
Gustav Sundell, Christer Dahlin, Martin Andersson, Mattias Thuvander
: Osseointegration of dental implants occurs on a hierarchy of length scales down to the atomic level. A deeper understanding of the complex processes that take place at the surface of an implant on the smallest scale is of interest for the development of improved biomaterials. To date, transmission electron microscopy (TEM) has been utilized for examination of the bone-implant interface, providing details on the nanometer level. In this study we show that TEM imaging can be complemented with atom probe tomography (APT) to reveal the chemical composition of a Ti-based dental implant in a human jaw on the atomic level of resolution...
November 18, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27871705/applications-of-cone-beam-computed-tomography-to-assess-the-effects-of-labial-crown%C3%A2-morphologies-and-collum-angles-on%C3%A2-torque%C3%A2-for-maxillary-anterior-teeth
#13
Wei-Dong Kong, Jun-Yu Ke, Xiang-Quan Hu, Wu Zhang, Shu-Shu Li, Yi Feng
INTRODUCTION: Currently, cone-beam computed tomography (CBCT) has been widely used because of its capacity to evaluate the anatomic structures of the maxilla, mandible, and teeth in 3 dimensions. However, articles about the use of CBCT to evaluate the relationships between the morphology of individual teeth and torque expression remain rare. In this study, we aimed to determine the influence of labial crown morphologies and collum angles on torque for maxillary anterior teeth using CBCT...
November 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27869624/surgical-outcome-and-prognostic-analysis-of-transoral-atlantoaxial-reduction-plate-system-for-basilar-invagination-a-voxel-based-morphometry-study
#14
Gejin Wei, Chenglong Shi, Zhiyun Wang, Hong Xia, Qingshui Yin, Zenghui Wu
BACKGROUND: The use of a transoral atlantoaxial reduction plate (TARP) system is an effective surgical approach for the treatment of basilar invagination. With the aim of improving the therapeutic efficacy of the TARP operation, we conducted a voxel-based morphometric study to quantitatively investigate the descent of the odontoid process and craniocervical volume changes. METHODS: We enrolled 20 patients with basilar invagination who underwent a TARP procedure...
October 19, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27867088/techniques-for-blood-volume-fmri-with-vaso-from-low-resolution-mapping-towards-sub-millimeter-layer-dependent-applications
#15
Laurentius Huber, Dimo Ivanov, Daniel A Handwerker, Sean Marrett, Maria Guidi, Kâmil Uludağ, Peter A Bandettini, Benedikt A Poser
Quantitative cerebral blood volume (CBV) fMRI has the potential to overcome several specific limitations of BOLD fMRI. It provides direct physiological interpretability and promises superior localization specificity in applications of sub-millimeter resolution fMRI applications at ultra-high magnetic fields (7T and higher). Non-invasive CBV fMRI using VASO (vascular space occupancy), however, is inherently limited with respect to its data acquisition efficiency, restricting its imaging coverage and achievable spatial and temporal resolution...
November 17, 2016: NeuroImage
https://www.readbyqxmd.com/read/27866794/treatment-of-symptomatic-acromioclavicular-joint-instability-by-a-docking-technique-clinical-indications-surgical-technique-and-outcomes
#16
W Ben Kibler, Aaron D Sciascia, Brent J Morris, David C Dome
PURPOSE: To report functional and objective outcomes resulting from surgical treatment of patients with symptomatic type III through V acromioclavicular (AC) joint injury by use of a modification of the anatomic AC joint reconstruction developed by Carofino and Mazzocca. METHODS: The study included all patients treated in 2009-2014 who presented with a history of direct trauma to the shoulder; deformity of the AC joint on clinical examination; radiographic findings that would classify the injury as a Rockwood type III, IV, or V injury; AC joint instability on clinical examination; and self-reported deficits of arm function on initial presentation, in whom a comprehensive and directed nonoperative program failed...
November 17, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27861510/heterogeneous-uptake-of-nanoparticles-in-mouse-models-of-pediatric-high-risk-neuroblastoma
#17
Ketan B Ghaghada, Zbigniew A Starosolski, Anna Lakoma, Caterina Kaffes, Saurabh Agarwal, Khannan K Athreya, Jason Shohet, Eugene Kim, Ananth Annapragada
Liposomal chemotherapeutics are exemplified by DOXIL® are commonly used in adult cancers. While these agents exhibit improved safety profile compared to their free drug counterparts, their treatment response rates have been ~ 20%, often attributed to the heterogeneous intratumoral uptake and distribution of liposomal nanoparticles. Non-invasive and quantitative monitoring of the uptake and distribution of liposomal nanoparticles in solid tumors could allow for patient stratification and personalized cancer nanomedicine...
2016: PloS One
https://www.readbyqxmd.com/read/27858838/a-case-report-of-children-s-divergent-dislocation-of-the-elbow-and-review-of-literature
#18
Yongtao Wu, Hai Jiang, Wusheng Miao
BACKGROUND: The divergent dislocation of the elbow is not common in children, and the imaging is difficult and challenging. This often leads to misdiagnosis or inappropriate treatment. The literature has reported a total of 19 cases currently. METHODS: A 10-year-old girl with divergent dislocation of the elbow was admitted in our department in November 2013. When playing basketball, her right elbow was injured on the concrete floor. After injury, her right elbow joint became severely swollen, with obvious deformity...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27852383/-surgery-of-ipsilateral-hawkins-%C3%A2-talus-neck-and-ankle-joint-fractures-via-internal-and-lateral-approaches-with-herbert-screws
#19
P Zhang, Q R Dong, Z Y Wang, B Chen, J H Wan, L Wang
Objective: To explore the manual operation skills of operative treatment of ipsilateral Hawkins Ⅲ talus neck and ankle joint fractures via internal and lateral approaches with Herbert screws, and to study the clinical results. Method: From Jan 2009 to Dec 2014, the clinical data of 13 patients with ipsilateral Hawkins Ⅲ talus neck and ankle joint fractres via internal and lateral approaches with Herbert screws were retrospectively analyzed in our department.There were 10 males and 3 female, ranging in age from 20 to 60 years with an average age of 31...
November 8, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27844229/one-step-reconstruction-with-a-3d-printed-custom-made-prosthesis-after-total-en-bloc-sacrectomy-a-technical-note
#20
Ran Wei, Wei Guo, Tao Ji, Yidan Zhang, Haijie Liang
BACKGROUND: Surgeries for primary malignancies involving upper sacrum require total en bloc sacrectomy followed by complex mechanical reconstruction, which might be simplified by application of the three-dimensional (3D) printing technique. PURPOSES: To describe the design of a 3D-printed custom-made prosthesis for reconstruction after total en bloc sacrectomy, the surgical technique, and the clinical and functional outcome of a patient. METHODS: A 62-year-old patient with recurrent sacral chordoma was admitted in our center...
November 14, 2016: European Spine Journal
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