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https://www.readbyqxmd.com/read/28532041/comparative-analysis-of-stress-in-a-new-proposal-of-dental-implants
#1
Mariana Lima da Costa Valente, Denise Tornavoi de Castro, Ana Paula Macedo, Antonio Carlos Shimano, Andréa Cândido Dos Reis
The purpose of this study was to compare, through photoelastic analysis, the stress distribution around conventional and modified external hexagon (EH) and morse taper (MT) dental implant connections. Four photoelastic models were prepared (n=1): Model 1 - conventional EH cylindrical implant (Ø 4.0mm×11mm - Neodent®), Model 2 - modified EH cylindrical implant, Model 3 - conventional MT Conical implant (Ø 4.3mm×10mm - Neodent®) and Model 4 - modified MT conical implant. 100 and 150N axial and oblique loads (30° tilt) were applied in the devices coupled to the implants...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531115/a-low-complexity-doa-and-polarization-method-of-polarization-sensitive-array
#2
Wen Dong, Ming Diao, Lipeng Gao, Lutao Liu
This paper proposes a low-complexity method to estimate the direction of arrival and polarization based on the polarization sensitive array (PSA) which is composed of cross-dipoles. We built a half-quaternions model through the Cayley-Dickson form to remove the redundant information. Then, the directions of arrival (DOAs) were estimated via the root-MUSIC algorithm. Finally, the polarizations were estimated by generalized eigenvalue method. Unlike some existing searching algorithms, such as multiple signal classification (MUSIC), this method can avoid the peak searching and maintains high estimation accuracy...
May 20, 2017: Sensors
https://www.readbyqxmd.com/read/28528385/instability-of-the-long-head-of-the-biceps-tendon-in-patients-with-rotator-cuff-tear-evaluation-on-magnetic-resonance-arthrography-of-the-shoulder-with-arthroscopic-correlation
#3
Yusuhn Kang, Joon Woo Lee, Joong Mo Ahn, Eugene Lee, Heung Sik Kang
OBJECTIVES: To evaluate the diagnostic value of MR arthrography (MRA) in diagnosing instability of the LHBT in patients with rotator cuff tendon tear. MATERIALS AND METHODS: The MR arthrograms of 101 patients were retrospectively reviewed and correlated with arthroscopic findings as the standard reference. Images were evaluated for (1) the integrity of the LHBT, (2) the position of the LHBT (subluxation/dislocation on axial images, inferior displacement on oblique sagittal image) and (3) the integrity of the biceps pulley (SGHL, supraspinatus and subscapularis tendon adjacent to the rotator interval)...
May 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28526027/description-of-inter-institutional-referrals-after-admission-for-labor-and-delivery-a-prospective-population-based-cohort-study-in-rural-maharashtra-india
#4
Archana B Patel, Amber Abhijeet Prakash, Camille Raynes-Greenow, Yamini V Pusdekar, Patricia L Hibberd
BACKGROUND: In 2008, the Indian government introduced financial assistance to encourage health facility deliveries. Facility births have increased, but maternal and neonatal morbidity and mortality have not decreased raising questions about the quality of care provided in facilities and access to a quality referral system. We evaluated the potential role of inter-institutional transfers of women admitted for labor and delivery on adverse maternal and neonatal outcomes in an ongoing prospective, population-based Maternal and Newborn Health Registry in Central India...
May 19, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28522210/novel-trigeminal-slice-preparation-method-for-studying-mechanisms-of-nociception-transmission
#5
Mikiko Hirahara, Naoshi Fujiwara, Kenji Seo
BACKGROUND: The trigeminal subnucleus caudalis (Vc) plays a critical role in transmission and modulation of nociceptive afferent inputs, and exhibits a similar layer construction to the spinal dorsal horn. However, afferent inputs enter the brainstem and project to a separately located nucleus. It has previously been difficult to record responses of the Vc to afferent fiber activation in a brainstem slice preparation. The aim of the present study was to establish a novel brainstem slice preparation method to study trigeminal nociceptive transmission mechanisms...
May 15, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28521914/the-face-of-conflict-significant-sharp-force-trauma-to-the-mid-facial-skeleton-in-an-individual-of-probable-16th-17th-century-date-excavated-from-byczyna-poland
#6
Agata Izabela Cieślik, Paweł Dąbrowski, Magdalena Anita Przysiężna-Pizarska
A variety of injuries have always been associated with violence, consequences of which people had to deal with. In this paper we present a complex of craniofacial and dental injuries resulted from sharp force trauma. The basis of our study was historical skeletal material excavated from archeological site in Byczyna (11th-17th century), Poland. An individual whose skeleton was exhumed from the grave No. 610 exhibited healed, oblique trauma of the left maxilla, damage to the crowns of right central and lateral incisors and concomitant luxation of the right maxillary central incisor...
June 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/28520297/the-optimal-approach-for-a-superior-hypogastric-plexus-block
#7
Ji Won Choi, Won Ho Kim, Chul Joong Lee, Woo Seog Sim, Sukhee Park, Hyun Byung Chae
INTRODUCTION: Superior hypogastric plexus block (SHGPB) is technically difficult and accurate procedure is required to avoid potential complications. We attempted to determine the reference angles for fluoroscopy-assisted SHGPB and to establish a predictor that can guide to select optimal approach between classic posterior approach and transdiscal approach. METHODS: Abdomino-pelvic CT scans from 268 patients diagnosed with pelvic malignancies were examined. The oblique and axial angles needed for the fluoroscope were measured both for posterior and transdiscal approaches by simulating the needle trajectory on CT imaging...
May 18, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/28517034/comparative-musculoskeletal-anatomy-of-chameleon-limbs-with-implications-for-the-evolution-of-arboreal-locomotion-in-lizards-and-for-teratology
#8
Julia L Molnar, Raul E Diaz, Tautis Skorka, Grant Dagliyan, Rui Diogo
Chameleon species have recently been adopted as models for evo-devo and macroevolutionary processes. However, most anatomical and developmental studies of chameleons focus on the skeleton, and information about their soft tissues is scarce. Here, we provide a detailed morphological description based on contrast enhanced micro-CT scans and dissections of the adult phenotype of all the forelimb and hindlimb muscles of the Veiled Chameleon (Chamaeleo calyptratus) and compare these muscles with those of other chameleons and lizards...
May 18, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28516314/harmonic-subtraction-for-evaluating-right-ventricle-ejection-fraction-from-planar-equilibrium-radionuclide-angiography
#9
Dacian V Bonta, John N Aarsvold, Sandra F Grant, Naomi P Alazraki
We report an initial investigation of a subtraction-based method to estimate right ventricle ejection fraction (RVEF) from ECG-gated planar equilibrium radionuclide angiography (ERNA) data. Twenty-six consecutive patients referred for scintigraphic evaluation of cardiac function prior to chemotherapy had ECG-gated first-pass (FP) imaging and ERNA imaging performed following the same radiotracer injection. RVEF was computed from FP images (RVEFFP) and separately from ERNA images (RVEFERNA). Standard methods for computing ejection fractions were used to obtain RVEFFP values...
May 17, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28515411/evaluating-myometrial-invasion-in-endometrial-cancer-comparison-of-reduced-field-of-view-diffusion-weighted-imaging-and-dynamic-contrast-enhanced-mr-imaging
#10
Mayumi Takeuchi, Kenji Matsuzaki, Masafumi Harada
PURPOSE: To compare the diagnostic ability of reduced field-of-view (FOV) diffusion-weighted (DW) magnetic resonance (MR) imaging with that of three-dimensional (3D) dynamic contrast-enhanced (DCE) MR imaging in evaluating the depth of myometrial invasion in patients with endometrial cancer. METHODS: Three tesla (3T) MR images including T2-weighted imaging, reduced FOV DW imaging and 3D DCE MR imaging in sagittal and oblique axial (short axis) planes in 25 women with surgically proven endometrial cancer were retrospectively evaluated...
May 18, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28514926/trunk-muscle-activity-patterns-and-motion-patterns-of-patients-with-motor-complete-spinal-cord-injury-at-t8-and-t10-walking-with-different-un-powered-exoskeletons
#11
Xinyu Guan, Shengzheng Kuai, Linhong Ji, Rencheng Wang, Run Ji
OBJECTIVE: The aim of this study was to explore how neurological injured levels of spinal cord affect the performance of patients walking with different un-powered exoskeletons. STUDY DESIGN: Case series observational study. SETTING: Gait and Motion Analysis Laboratory at the National Research Center Rehabilitation Technical Aids. METHODS: Electromyography and motion data from two subjects with complete spinal cord injury at T10 and T8 walking with un-powered exoskeletons were collected simultaneously...
May 17, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28514510/injury-to-the-infrapatellar-branch-of-the-saphenous-nerve-during-tendon-graft-harvesting-for-knee-ligament-reconstruction-an-ultrasound-simulation-study
#12
Przemysław A Pękala, Ewa Miza, Brandon Michael Henry, Patrick Popieluszko, Marios Loukas, Krzysztof A Tomaszewski
INTRODUCTION: The clinical anatomy of the infrapatellar branch of the saphenous nerve (IPBSN) is of particular importance during operations in the area of the knee, especially when material for anterior cruciate ligament reconstruction is harvested. The nerve can easily be injured during the harvesting procedure, leading to postoperative complications that reduce quality of life. Three different skin incisions are commonly used during hamstring tendon harvesting: horizontal, vertical, and oblique...
May 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28510774/combined-surgery-for-simultaneous-treatment-of-congenital-ptosis-and-coexisting-strabismus
#13
Feng Zhou, Ming Ouyang, Dahui Ma, Guiqin Liu, Hongbo Cheng
PURPOSE: To evaluate the clinical outcomes of single-stage surgery for treatment of patients with congenital ptosis and coexisting strabismus. METHODS: A retrospective analysis was performed on 10 patients (17 eyes) with congenital ptosis and coexisting strabismus. Patients were treated with levator resection or frontalis suspension for ptosis and ocular muscle surgery for strabismus, performed as a single-stage procedure. Levator resection was performed in 9 patients (15 eyes) and frontalis muscle flap suspension was performed in 1 patient (2 eyes) with blepharophimosis...
May 15, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28510770/inferior-oblique-overaction-anterior-transposition-versus-myectomy
#14
Zhale Rajavi, Mohadeseh Feizi, Narges Behradfar, Mehdi Yaseri, Shima Sayanjali, Tahmine Motevaseli, Hamideh Sabbaghi, Mohammad Faghihi
PURPOSE: To compare the efficacy of inferior oblique myectomy and anterior transposition for correcting inferior oblique overaction (IOOA). METHODS: This retrospective study was conducted on 56 patients with IOOA who had either myectomy or anterior transposition of the inferior oblique muscle from 2010 to 2015. The authors compared preoperative and postoperative inferior oblique muscle function grading (-4 to +4) as the main outcome measure and vertical and horizontal deviation, dissociated vertical deviation (DVD), and A- and V-pattern between the two surgical groups as secondary outcomes...
May 15, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28510689/chronic-enteropathy-associated-with-slco2a1-gene-ceas-characterization-of-an-enteric-disorder-to-be-considered-in-the-differential-diagnosis-of-crohn-s-disease
#15
Naoki Hosoe, Naoki Ohmiya, Fumihito Hirai, Junji Umeno, Motohiro Esaki, Hirokazu Yamagami, Kei Onodera, Shigeki Bamba, Hiroyuki Imaeda, Shunichi Yanai, Tadakazu Hisamatsu, Haruhiko Ogata, Takayuki Matsumoto
Small intestinal ulcers include mucosal damage caused by drugs, particularly nonsteroidal anti-inflammatory drugs (NSAIDs), infectious diseases, and idiopathic inflammatory bowel disease. Previously, a group of Japanese investigators reported an unusual and uncommon type of enteritis and referred to the condition as chronic nonspecific multiple ulcers of the small intestine (CNSU). CNSU is characterized by chronic blood and protein loss through persistent small intestinal ulcers. Recently, four candidate mutations in the solute carrier organic anion transporter family, member 2A1 (SLCO2A1) gene, encoding a prostaglandin transporter, were identified by whole-exam sequencing in patients with CNSU...
May 16, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28508273/sleeve-gastrectomy-correlation-of-long-term-results-with-remnant-morphology-and-eating-disorders
#16
Daniele Tassinari, Rossana D Berta, Monica Nannipieri, Patrizia Giusti, Luca Di Paolo, Daniela Guarino, Marco Anselmino
BACKGROUND: Remnant dimension is considered one of the crucial elements determining the success of sleeve gastrectomy (SG), and dilation of the gastric fundus is often believed to be the main cause of failure. OBJECTIVES: The main outcome of this study is to find correlations between remnant morphology in the immediate post-operative stage, its dilation in years, and the long-term results. The second purpose aims to correlate preoperative eating disorders, taste alteration, hunger perception, and early satiety with post-SG results...
May 15, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28508263/new-insights-into-the-anatomy-of-the-midface-musculature-and-its-implications-on-the-nasolabial-fold
#17
Chelsea C Snider, Ashley N Amalfi, Lauren E Hutchinson, Nicole Z Sommer
BACKGROUND: The prominent nasolabial fold is a distinct feature of the aging midface. As minimally invasive procedures have become mainstream, chemodenervation is a preferred method for treating dynamic facial rhytids. We therefore sought to identify relevant nasolabial fold and midfacial muscular anatomy to determine the ideal location of neuromodulation to improve the aesthetics of the midface and nasolabial fold without altering the upper lip and smile. METHODS: Twelve hemifacial cadaveric dissections were performed to identify midface muscle origin, insertion, width, vector of pull, and neighboring structures...
May 15, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28507636/influence-of-number-of-implants-and-attachment-type-on-stress-distribution-in-mandibular-implant-retained-overdentures-finite-element-analysis
#18
Mohamed I El-Anwar, Eman A El-Taftazany, Hamdy A Hamed, Mohamed A Abd ElHay
AIM: This study aimed to compare the stresses generated by using two or four root form dental implants supporting mandibular overdentures that were retained with ball and locator attachments. METHODS: Under ANSYS environment, four 3D finite element models were prepared. These models simulated complete overdentures supported by two or four implants with either ball or locator attachments as a connection mechanism. The models' components were created by CAD/CAM package then were imported to ANSYS...
April 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28507593/short-questionnaire-for-workplace-analysis-kfza-factorial-validation-in-physicians-and-nurses-working-in-hospital-settings
#19
Patricia Appel, Michael Schuler, Heiner Vogel, Amina Oezelsel, Hermann Faller
BACKGROUND: In recent years, there has been an increasing interest in psychosocial workplace risk assessments in Germany. One of the questionnaires commonly employed for this purpose is the Short Questionnaire for Workplace Analysis (KFZA). Originally, the KFZA was developed and validated for office workers. The aim of the present study was to examine the factorial validity of the KFZA when applied to hospital settings. Therefore, we examined the factorial structure of a questionnaire that contained all the original items plus an extension adding 11 questions specific to hospital workplaces and analyzed both, the original version and the extended version...
2017: Journal of Occupational Medicine and Toxicology
https://www.readbyqxmd.com/read/28506167/two-dimensional-morphological-characteristics-of-the-distal-radius-on-axial-magnetic-resonance-image-and-the-effects-on-distal-screw-length
#20
Ho Youn Park, Youn Tae Roh, Dong Uk Min, Seok Whan Song, Yoo Joon Sur
BACKGROUND: Detection of dorsal cortical penetration of distal locking screws is difficult owing to the irregular shape of the dorsal surface of the distal radius. This study was designed to analyze two-dimensional morphological characteristics of the distal radius on axial magnetic resonance image, and to suggest a guideline for evaluation of screw length in distal radius fractures on the fluoroscopic or plain X-ray true lateral image. METHODS: Anteroposterior length and lateral width of the distal radius, distance between the highest and the lowest point of the dorsal cortex (deceptive length), and widths of the first to second (hazard zone) and the third to fifth extensor compartments (safe zone) at the Lister tubercle level were measured on 104 axial magnetic resonance images by two hand surgeons...
June 2017: Journal of Hand Surgery Asian-Pacific Volume
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