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https://www.readbyqxmd.com/read/29458136/changes-in-anatomic-position-of-root-canal-orifices-in-pluriradicular-teeth-following-re-location-during-endodontic-treatment
#1
Darian Rusu, Petra Surlin, Stratul Stefan-Ioan, Marius Boariu, Calniceanu Horia, Adrian Kasaj, Cosmin Sinescu, Didilescu Andreea
Direct access to the root canals in posterior teeth for endodontic treatment is most frequently facilitated by the straightening of the coronal parts of the root canals, having as a consequence the relocation of the canal orifices on the map of the floor of the pulp chamber (Christie & Thompson, 1994). This procedure intentionally moves the coronal aspect of a canal away from the center of the chamber, while simultaneously removing internal dentin from the pulp chamber walls. The aim of this study was to evaluate the displacement resulting from the relocation of root canal orifices during the initial phase of rotary root canal treatment in molars using the dental operating microscope (DOM) and digital image processing...
February 16, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29455785/esophageal-positions-relative-to-the-left-atrium-data-from-293-patients-before-catheter-ablation-of-atrial-fibrillation
#2
Zdenek Starek, Frantisek Lehar, Jiri Jez, Martin Scurek, Jiri Wolf, Tomas Kulik, Alena Zbankova
AIMS: Three-dimensional rotational angiography (3DRA) of the left atrium (LA) and the esophagus is a simple and safe method for analyzing the relationship between the esophagus and the LA during catheter ablation of atrial fibrillation. The purpose of this study is to describe the location of the esophagus relative to the LA and mobility of the esophagus during ablation procedure. METHODS: From 3/2011 to 9/2015, 3DRA of the LA and esophagus was performed in 326 patients before catheter ablation of atrial fibrillation...
January 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29455490/-clinical-application-of-anterior-thoracoscopically-assisted-surgery-with-posterior-one-stage-total-en-block-spondylectomy-for-thoracic-spinal-tumor
#3
Wen Xue, Xiao-Li Guan, Zeng-Ping Wang, Zhong-Yu Hao, Lin Liu, Yao-Wen Qian
OBJECTIVE: To investigate the clincial effects and feasibility of anterior thoracoscopically assisted surgery (TAS) with posterior one-stage total en block spondylectomy(TES) for thoracic spinal tumour. METHODS: From October 2014 to January 2016, 4 patients with thoracic spinal tumour were treated by anterior thoracoscopically assisted surgery with posterior one-stage total en block spondylectomy. There were 2 males and 2 females, aged 16, 35, 46, 60 years. Courses of disease were 1, 4, 6, 9 months...
September 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29454119/anatomical-study-of-the-nutrient-foramina-of-the-posterior-axis-with-application-to-c2-pedicle-screw-placement
#4
Tamir Tawfik, Joe Iwanaga, Emre Yilmaz, Paul Choi, Charlotte Wilson, Emily Simonds, Jared J Marks, Haynes L Harkey, Rod J Oskouian, R Shane Tubbs
OBJECTIVE: Pedicle screws placed into C2 necessitate a thorough understanding of this bone's unique anatomy. Although multiple landmarks and measurements have been used by surgeons, these are often varied in the literature with no consensus. Herein, we studied one recently proposed landmark using the nutrient foramina of the posterior aspect of C2 for pedicle screw placement. METHODS: On 19 (38 sides) C2 dry bone specimens, the presence, size, location, and distance from the midline of the nutrient foramina found at the junction between the isthmus and lamina were documented and measured...
February 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29452716/dental-pulp-status-of-posterior-teeth-in-patients-with-oral-and-oropharyngeal-cancer-treated-with-radiotherapy-1-year-follow-up
#5
Nishtha Gupta, Mandeep S Grewal, Munish Gairola, Stutee Grewal, Parveen Ahlawat
INTRODUCTION: Teeth may react negatively to pulp sensitivity testing in patients who have undergone radiotherapy. The aim of the current investigation was to evaluate the pulp sensibility of posterior teeth at 4, 6, and 12 months in patients who have undergone radiotherapy for oral and oropharyngeal malignancies. METHODS: Seventy-nine patients diagnosed with malignant oral and oropharyngeal cancer undergoing radiotherapy underwent cold thermal pulp sensitivity testing and electric pulp testing of 4 teeth, 1 from each quadrant...
February 13, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29451437/do-intraoperative-radiographs-predict-final-lumbar-sagittal-alignment-following-single-level-transforaminal-lumbar-interbody-fusion
#6
Khalid M I Salem, Aditya P Eranki, Scott Paquette, Michael Boyd, John Street, Brian K Kwon, Charles G Fisher, Marcel F Dvorak
OBJECTIVE The study aimed to determine if the intraoperative segmental lordosis (as calculated on a cross-table lateral radiograph following a single-level transforaminal lumbar interbody fusion [TLIF] for degenerative spondylolisthesis/low-grade isthmic spondylolisthesis) is maintained at discharge and at 6 months postsurgery. METHODS The authors reviewed images and medical records of patients ≥ 16 years of age with a diagnosis of an isolated single-level, low-grade spondylolisthesis (degenerative or isthmic) with symptomatic spinal stenosis treated between January 2008 and April 2014...
February 16, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29450645/brain-c-fos-expression-patterns-induced-by-emotional-stressors-differing-in-nature-and-intensity
#7
Jesús Úbeda-Contreras, Ignacio Marín-Blasco, Roser Nadal, Antonio Armario
Regardless of its particular nature, emotional stressors appear to elicit a widespread and roughly similar brain activation pattern as evaluated by c-fos expression. However, their behavioral and physiological consequences may strongly differ. Here we addressed in adult male rats the contribution of the intensity and the particular nature of stressors by comparing, in a set of brain areas, the number of c-fos expressing neurons in response to open-field, cat odor or immobilization on boards (IMO). These are qualitatively different stressors that are known to differ in terms of intensity, as evaluated by biological markers...
February 15, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29449278/7t-brain-mrs-in-hiv-infection-correlation-with-cognitive-impairment-and-performance-on-neuropsychological-tests
#8
M Mohamed, P B Barker, R L Skolasky, N Sacktor
BACKGROUND AND PURPOSE: Validated neuroimaging markers of HIV-associated neurocognitive disorder in patients on antiretroviral therapy are urgently needed for clinical trials. The purpose of this study was to explore the relationship between cognitive impairment and brain metabolism in older subjects with HIV infection. It was hypothesized that MR spectroscopy measurements related to neuronal health and function (particularly N -acetylaspartate and glutamate) would be lower in HIV-positive subjects with worse cognitive performance...
February 15, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29449269/%C3%A4-whina-revolution-a-bayesian-analysis-of-undergraduate-and-postgraduate-completion-rates-from-a-program-for-m%C3%A4-ori-and-pacific-success-in-stem-disciplines
#9
Ken Richardson, Zaramasina Clark, Michael Gaines, Hautahi Kingi, Sonja Miller, Willie Pearson, Liz Richardson
Māori and Pacific students generally do not attain the same levels of tertiary success as New Zealanders of European descent, particularly in science, technology, engineering, and mathematics (STEM) subjects. Te Rōpū Āwhina (Āwhina), an equity initiative at Victoria University of Wellington in New Zealand between 1999 and 2015, aimed to produce Māori and Pacific professionals in STEM disciplines who contribute to Māori and Pacific community development and leadership. A hierarchical Bayesian approach was used to estimate posterior standardized completion rates for 3-year undergraduate and 2-year postgraduate degrees undertaken by non-Māori-Pacific and Māori-Pacific students...
2018: CBE Life Sciences Education
https://www.readbyqxmd.com/read/29449083/three-dimensional-scapular-dyskinesis-in-hook-plated-acromioclavicular-dislocation-including-hook-motion
#10
Eugene Kim, Seunghee Lee, Hwa-Jae Jeong, Jai Hyung Park, Se-Jin Park, Jaewook Lee, Woosub Kim, Hee Jin Park, So Yeon Lee, Tsuyoshi Murase, Kazuomi Sugamoto, Sumika Ikemoto
BACKGROUND: The purpose of this study is to analyze the 3-dimensional scapular dyskinesis and the kinematics of a hook plate relative to the acromion after hook-plated acromioclavicular dislocation in vivo. Reported complications of acromioclavicular reduction using a hook plate include subacromial erosion and impingement. However, there are few reports of the 3-dimensional kinematics of the hook and scapula after the aforementioned surgical procedure. METHODS: We studied 15 cases of acromioclavicular dislocation treated with a hook plate and 15 contralateral normal shoulders using computed tomography in the neutral and full forward flexion positions...
February 13, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29448262/assessment-of-location-of-the-mandibular-canal-correlation-between-panoramic-and-cone-beam-computed-tomography-measurements
#11
Felix Bertram, Stefan Bertram, Ansgar Rudisch, Rüdiger Emshoff
PURPOSE: To compare panoramic and cone beam computed tomography (CBCT) determinations of implant-to-mandibular canal (MC) dimensions in mandibular regions posterior to the mental foramen and to investigate whether factors such as gender, age, region, and vertical dimension influence correlation between the two techniques. MATERIALS AND METHODS: A retrospective analysis was carried out in 64 consecutive adult patients (42 females, 22 males; average age 57.1 ± 13...
February 15, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29447377/behavioral-and-neural-indices-of-affective-coloring-for-neutral-social-stimuli
#12
Daniel W Grupe, Stacey M Schaefer, Regina C Lapate, Andrew J Schoen, Lauren K Gresham, Jeanette A Mumford, Richard J Davidson
Emotional processing often continues beyond the presentation of emotionally evocative stimuli, which can result in affective biasing or coloring of subsequently encountered events. Here, we describe neural correlates of affective coloring and examine how individual differences in affective style impact the magnitude of affective coloring. We conducted functional magnetic resonance imaging in 117 adults who passively viewed negative, neutral, and positive pictures presented 2s prior to neutral faces. Brain responses to neutral faces were modulated by the valence of preceding pictures, with greater activation for faces following negative (vs...
February 13, 2018: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29446810/postoperative-endophtalmities-therapeuthic-results-and-early-vitrectomy
#13
Imen Zghal, Amine Souguir, Olfa Fekih, Amel Chebbi, Omar Romdhane, Hedi Bouguila, Leila Nacef
BACKGROUND: Postoperative endophthalmitis is a public health issue due to its bad prognosis; its treatment is both surgical and medical. Classically, surgical treatment was done if visual acuity is limited to light perception only. AIM: To evaluate therapeutic results Of postoperative endophtalmitieS and to Compare therapeutics almost used intravitreal injection of antibiotics versus early vitrectomy. METHODS: It's a retrospective comparative study includIng 120 cases of acute postoperative endophthalmitis hospitalized in a referral ophthalmology department between July 2007 and June 2013...
March 2017: La Tunisie Médicale
https://www.readbyqxmd.com/read/29446460/a-multivariate-ecogeographic-analysis-of-macaque-craniodental-variation
#14
Nicole D S Grunstra, Philipp Mitteroecker, Robert A Foley
OBJECTIVES: To infer the ecogeographic conditions that underlie the evolutionary diversification of macaques, we investigated the within- and between-species relationships of craniodental dimensions, geography, and environment in extant macaque species. We studied evolutionary processes by contrasting macroevolutionary patterns, phylogeny, and within-species associations. MATERIALS AND METHODS: Sixty-three linear measurements of the permanent dentition and skull along with data about climate, ecology (environment), and spatial geography were collected for 711 specimens of 12 macaque species and analyzed by a multivariate approach...
February 15, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29445949/postoperative-k-line-conversion-from-negative-to-positive-is-independently-associated-with-a-better-surgical-outcome-after-posterior-decompression-with-instrumented-fusion-for-k-line-negative-cervical-ossification-of-the-posterior-ligament
#15
Masao Koda, Takeo Furuya, Junya Saito, Yasushi Ijima, Mitsuhiro Kitamura, Seiji Ohtori, Sumihisa Orita, Kazuhide Inage, Tetsuya Abe, Hiroshi Noguchi, Toru Funayama, Hiroshi Kumagai, Kosei Miura, Katsuya Nagashima, Masashi Yamazaki
PURPOSE: Addition of posterior instrumented fusion to laminoplasty (posterior decompression with instrumented fusion: PDF) can improve the surgical outcome of patients with K-line (-) cervical ossification of the longitudinal ligament (OPLL) compared with laminoplasty alone. We sought to elucidate the factors that are significantly associated with a better outcome after PDF for K-line (-) OPLL. METHODS: The present study included 38 patients who underwent PDF for K-line (-) OPLL and were followed up for at least 1 year after surgery...
February 14, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29445945/spectral-domain-optical-coherence-tomography-and-fundus-autofluorescence-findings-in-cytomegalovirus-retinitis-in-hiv-infected-patients
#16
Shigeko Yashiro, Takeshi Nishijima, Yuuka Yamamoto, Yumi Sekine, Natsuyo Yoshida-Hata, Tomohiro Iida, Shinichi Oka
PURPOSE: To assess the usefulness of spectral domain optical coherence tomography (SD-OCT) and fundus autofluorescence (FAF) findings in cytomegalovirus (CMV) retinitis. STUDY DESIGN: Observational case series. METHODS: Thirteen eyes of 11 human immunodeficiency virus (HIV)-positive patients with CMV retinitis underwent full ophthalmologic examinations, SD-OCT, and 4 eyes of 4 patients underwent FAF. FAF images included short-wavelength autofluorescence (SW-AF) and near-infrared autofluorescence (IR-AF)...
February 14, 2018: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29445433/upright-catheter-based-cerebral-angiography
#17
Adnan I Qureshi, Muhammad A Saleem, Omer Naveed, Mohtasim A Qureshi, Shawn S Wallery
Background: Several studies using Doppler ultrasound have suggested cerebral venous drainage is through paravertebral venous plexus due to the collapse of internal jugular veins in an upright position. Methods: We present a technique of acquiring venographic images during an upright position as part of catheter-based angiography to provide additional information regarding cerebral venous diseases. Angiographic images in anteroposterior projection were acquired in lying position and after patients were placed at 60° using radiolucent supporting wedges on angiographic table...
December 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/29444764/clinical-radiological-pathological-correlation-in-an-unusual-case-of-refractory-epilepsy-a-two-year-journey-of-whodunit
#18
Deepak Menon, Ramshekhar N Menon, Chandrasekharan Kesavadas, Anita Mahadevan, Ashalatha Radhakrishnan, Sudheeran Kannoth, Pradeep P Nair, Mathew Abraham, Bejoy Thomas, Sanjeev V Thomas
New-onset refractory focal epilepsy poses significant challenges to the clinician in the absence of specific diagnostic biomarkers. Differential diagnoses based on imaging may be expanded by a veritable spectrum of peri-ictal imaging findings that may mask the underlying substrate. We report a 13-year-old girl who presented with refractory focal seizures of left parieto-occipital origin with cytotoxic gyral oedema noted over the same region on imaging. Despite an initial negative autoantibody profile, the patient was treated with immunosuppression, followed by serial relapses requiring immune-modulation...
February 14, 2018: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/29444695/the-impact-of-manual-rotation-of-the-occiput-posterior-position-on-spontaneous-vaginal-delivery-rate-study-protocol-for-a-randomized-clinical-trial-rmos
#19
C Verhaeghe, E Parot-Schinkel, P E Bouet, S Madzou, F Biquard, P Gillard, P Descamps, G Legendre
BACKGROUND: The frequency of posterior presentations (occiput of the fetus towards the sacrum of the mother) in labor is approximately 20% and, of this, 5% remain posterior until the end of labor. These posterior presentations are associated with higher rates of cesarean section and instrumental delivery. Manual rotation of a posterior position in order to rotate the fetus to an anterior position has been proposed in order to reduce the rate of instrumental fetal delivery. No randomized study has compared the efficacy of this procedure to expectant management...
February 14, 2018: Trials
https://www.readbyqxmd.com/read/29444669/effects-of-multilevel-posterior-ligament-dissection-after-spinal-instrumentation-on-adjacent-segment-biomechanics-as-a-potential-risk-factor-for-proximal-junctional-kyphosis-a-biomechanical-study
#20
Tobias Lange, Tobias L Schulte, Georg Gosheger, Albert Schulze Boevingloh, Raul Mayr, Werner Schmoelz
BACKGROUND: Spinous processes and posterior ligaments, such as inter- and supraspinous ligaments are often sacrificed either deliberately to harvest osseous material for final spondylodesis e.g. in deformity corrective surgery or accidentally after posterior spinal instrumentation. This biomechanical study evaluates the potential destabilizing effect of a progressive dissection of the posterior ligaments (PL) after instrumented spinal fusion as a potential risk factor for proximal junctional kyphosis (PJK)...
February 14, 2018: BMC Musculoskeletal Disorders
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