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https://www.readbyqxmd.com/read/28520560/assessing-age-related-change-in-japanese-mental-foramen-opening-direction-using-multidetector-computed-tomography
#1
N Ishii, Y Makino, M Fujita, A Sakuma, S Torimitsu, F Chiba, D Yajima, G Inokuchi, A Motomura, N H Iwase, H Saitoh
OBJECTIVE: The purpose of this study was to investigate how the opening direction of the mental foramen (MF) changes with age in a Japanese population using multi-detector computed tomography (MDCT). METHODS: Post-mortem MDCT scans of 121 Japanese subjects (66 males and 55 females) were carried out where all subjects possessed at least twenty teeth, including molar teeth, in the upper and lower jaws. Two angles of the mental foramen opening were measured, namely the superior-inferior angle in the coronal plane and anterior-posterior angle in the transverse plane, on the CT reconstructed images...
December 1, 2016: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/28512492/in-vitro-sealing-properties-of-calcium-enriched-mixture-and-mineral-trioxide-aggregate-orifice-barriers-during-intra-coronal-bleaching
#2
Negar Moghadam, Amir Ardalan Abdollahi, Hoda Aghabalayi Fakhim, Zahra Borna
INTRODUCTION: This study aimed at evaluating the sealing properties of calcium-enriched mixture (CEM) compared to mineral trioxide aggregate (MTA) as a cervical barriers in intra-coronal bleaching. METHODS AND MATERIALS: In this in vitro study, endodontic treatment was performed on 60 extracted human incisors and canines without canal calcification, caries, restorations, resorption or cracks. The teeth were then randomly divided into two experimental groups and two control groups (n=15)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28512488/in-vitro-microleakage-of-mineral-trioxide-aggregate-calcium-enriched-mixture-cement-and-biodentine-intra-orifice-barriers
#3
Fatemeh Ramezanali, Sasan Aryanezhad, Fatemeh Mohammadian, Fatemeh Dibaji, Mohammad Javad Kharazifard
INTRODUCTION: This in vitro study compared the coronal microleakage of mineral trioxide aggregate (MTA), calcium-enriched mixture (CEM) cement and Biodentine as intra-orifice barriers. METHODS AND MATERIALS: The study was conducted on 76 extracted single-canal human teeth. Their root canals were prepared using ProTaper rotary files and filled with gutta percha and AH-26 sealer using lateral condensation technique. Coronal 3 mm of the gutta percha was removed from the root canals and replaced randomly with MTA, CEM cement or Biodentine in the three experimental groups (n=22)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28512482/effect-of-field-of-view-on-detection-of-external-root-resorption-in-cone-beam-computed-tomography
#4
(no author information available yet)
INTRODUCTION: Conventional methods for diagnosis of external root resorption (ERR) are based on clinical findings and x-ray observations which are not appropriate for early diagnosis. The present study assessed the effect of different sizes and field of views (FOVs) in the diagnosis of simulated external root resorption by cone-beam computed tomography (CBCT). METHODS AND MATERIALS: In this diagnostic in vitro trial, 100 human extracted mandibular central incisors were collected and marked in 3 apical, middle and coronal areas...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28502570/a-comparison-of-short-term-radiological-alignment-outcomes-of-the-patient-specific-and-standard-instrumentation-for-primary-total-knee-arthroplasty-a-systematic-review-and-meta-analysis
#5
Ilhan Alcelik, Mark Blomfield, Cenk Öztürk, Ashish Soni, Richard Charity, Alex Acornley
OBJECTIVE: The aim of this study was to review the radiological alignment outcomes of patient Specific (PS) cutting blocks and Standard Instrumentation in Primary Total Knee Arthroplasty. METHODS: We hypothesized that the use of PS techniques would significantly improve sagittal, coronal and rotational alignment of the prosthesis on short term. We performed a systematic review and a meta-analysis including all the randomised controlled trials (RCT) using PS and standard (ST) total knee arthroplasty to date...
May 11, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28499396/averaging-rotational-landmarks-during-total-knee-arthroplasty-reduces-component-malrotation-caused-by-femoral-asymmetry
#6
Tat Woon Chao, Liam Geraghty, Pandelis Dimitriou, Simon Talbot
BACKGROUND: Femoral component malrotation is a common cause of patient dissatisfaction after total knee arthroplasty. The sulcus line (SL) is more accurate than Whiteside's line as it corrects for variation in the coronal orientation of the groove. The hypothesis is that averaging the SL and posterior condylar axis (PCA) will reduce femoral malrotation. METHODS: The component was inserted at a position between the SL and PCA in 91 patients. An intraoperative photograph was taken showing the landmarks...
May 12, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28494605/intra-pulpal-and-subsurface-temperature-rise-during-tooth-irradiation-with-808-nm-diode-laser-an-in-vitro-study
#7
F Khouja, M Abdelaziz, T Bortolotto, I Krejci
AIM: This in vitro study evaluated the pulpal and subsurface temperatures during proximal tooth surface irradiation with different settings of an 808 nm diode laser. MATERIALS AND METHODS: The elevation of pulpal and subsurface temperature during irradiation was measured using thermocouples positioned in the centre of the pulp chamber (n=30) and in the centre of a prepared 1.5 mm deep coronal cavity (n=30). Each sample was irradiated 3 times within one-week interval using different exposure settings...
March 2017: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28484790/lateral-meniscus-posterior-root-tear-contributes-to-anterolateral-rotational-instability-and-meniscus-extrusion-in-anterior-cruciate-ligament-injured-patients
#8
Takao Minami, Takeshi Muneta, Ichiro Sekiya, Toshifumi Watanabe, Tomoyuki Mochizuki, Masafumi Horie, Hiroki Katagiri, Koji Otabe, Toshiyuki Ohara, Mai Katakura, Hideyuki Koga
PURPOSE: The purposes of this study were to investigate (1) meniscus status and clinical findings in anterior cruciate ligament (ACL)-injured patients to clarify associations between the meniscus posterior root tear (PRT) and knee instability, and (2) magnetic resonance imaging (MRI) findings of the PRT to clarify sensitivity and specificity of MRI and prevalence of meniscus extrusion. METHODS: Three hundred and seventeen patients with primary ACL reconstruction were included...
May 8, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28483236/the-prevalence-of-the-onodi-cell-most-suitable-method-of-ct-evaluation-in-its-detection
#9
L P Chmielik, A Chmielik
BACKGROUND: The Onodi cell (sphenoethmoidal air cell) is an anatomic variant of the most posterior ethmoid cell that pneumatised superiorly and laterally to the sphenoid sinus, and is in close relation to the optic nerve. The proper identification of the Onodi cell is essential during a pre-operative computer tomography (CT) examination, as the presence of that ethmoid cell variant makes sphenoid sinus surgery more risky. The bulging of the optic nerve to the ethmoid cell wall is well visualized during endoscopic examination, but there are no clearly defined criteria for a potentially dangerous Onodi cell type in CT examinations...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28472514/evaluating-atlantoaxial-dislocation-based-on-cartesian-coordinates-proposing-a-new-definition-and-its-impact-on-assessment-of-congenital-torticollis
#10
Jayesh Sardhara, Sanjay Behari, Pavaman Sindgikar, Arun Kumar Srivastava, Anant Mehrotra, Kuntal Kanti Das, Kamlesh Singh Bhaisora, Rabi N Sahu, Awadhesh K Jaiswal
BACKGROUND: Conventional 2-dimensional (2-D) definition of atlantoaxial dislocation (AAD) is inadequate for coexisting 3-D displacements. OBJECTIVE: To prospectively classify AAD and its related abnormalities along 3 Cartesian coordinates and assess their association with torticollis. METHODS: One hundred and fifty-four patients with congenital AAD were prospectively classified according to their C1-2 displacement along 3 Cartesian coordinates utilizing 3-D multiplanar CT...
May 3, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28471914/medial-clamp-tine-positioning-affects-ankle-syndesmosis-malreduction
#11
Christopher T Cosgrove, Sara M Putnam, Steven M Cherney, William M Ricci, Amanda Spraggs-Hughes, Christopher M McAndrew, Michael J Gardner
OBJECTIVES: The purpose of this study was to determine if the position of the medial clamp tine during syndesmotic reduction affected reduction accuracy. DESIGN: Prospective Cohort. SETTING: Urban level 1 trauma center. PATIENTS: Seventy-two patients with operatively treated syndesmotic injuries. INTERVENTION: Patients underwent operative fixation of their ankle syndesmotic injuries using reduction forceps...
April 29, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28469815/influence-of-enhancement-filters-in-apical-bone-loss-measurement-a-cone-beam-computed-tomography-study
#12
Emerson-Tavares de Sousa, Mayara-Abreu Pinheiro, Patrícia-Pereira Maciel, Marcelo-Augusto-Oliveira Sales
BACKGROUND: The use of cone-beam computed tomography images (CBCT) providing a better assessment of bone injuries, although the sensibility of lesions measurement might be improved by the use of enhancement filters. Objective: This study aimed to analyze the influence of enhancement filters in apical bone loss measurement. MATERIAL AND METHODS: Eighteen CBCT cases randomly selected of apical bone loss were evaluated. The analyses were carried out following the evaluation in axial, coronal and sagittal protocols, using enhancement filters as Hard, Normal, and Very Sharp...
April 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28468222/tomographic-evaluation-of-prevalence-position-and-diameter-of-the-intraosseous-branch-of-the-posterior-superior-alveolar-artery-in-fully-edentulous-individuals
#13
Guilherme José Pimentel Lopes de Oliveira, Marciel Antônio Abdala, Hugo Nary-Filho, Celso Eduardo Sakakura, Valdir Gouveia Garcia, Felipe Coletti Leite
The objective of this study was to evaluate the presence, position, and diameter of the intraosseous branch (IObr) of the posterior superior alveolar artery in fully edentulous patients. Two-hundred five computed tomography scans of fully edentulous patients were analyzed. The presence of the IObr was investigated in the coronal plane at the lateral wall of the maxillary sinus. In patients in whom the IObr was detected, the artery diameter was measured, and the distance from the artery to the bone crest of the alveolar ridge, the maxillary sinus floor, and the distance of the maxillary sinus floor to the bone crest of the alveolar ridge were measured as well...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28468147/a-surgical-technique-for-management-of-the-metopic-suture-in-syndromic-craniosynostosis
#14
Jose Rolando Prada-Madrid, Lina Patricia Franco-Chaparro, Miguel Garcia-Wenninger, Tatiana Palomino-Consuegra, Nora Stanford, Diego Alejandro Castañeda-Hernández
OBJECTIVES: The objective is to describe a new surgical procedure developed in the San Jose Pediatric University Hospital for the management of syndromic synostosis of the metopic suture in a patient clinically diagnosed with Saethre-Chotzen syndrome. METHODS: The diagnosis of Saethre-Chotzen syndrome, bilateral coronal sutures, and metopic suture synostoses was made through photographic, anthropometric, exophthalmometric, and computed tomography analysis. The keel-like frontal bone deformity was corrected following resection using a fusiform osteotomy, remodelling was obtained by milling the edges, and the bony fragments were repositioned and fixed on the posterior wall of the frontal bone...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28464019/radiologic-assessment-of-quality-of-root-canal-fillings-and-periapical-status-in-an-austrian-subpopulation-an-observational-study
#15
Andrej M Kielbassa, Wilhelm Frank, Theresa Madaus
BACKGROUND/OBJECTIVE: Progress in endodontic techniques and methodological advances have altered root canal therapy over the last decades. These techniques and methods need periodical documentation. This observational study determined the current prevalence of endodontic treatments, and investigated the relationship of various factors with the periapical status in a Lower Austrian subpopulation. METHODOLOGY: One thousand orthopantomograms of first-time university adult patients radiographed at an outpatient clinic were evaluated...
2017: PloS One
https://www.readbyqxmd.com/read/28462791/cervical-vertebral-body-fracture-with-ankylosing-spondylitis-treated-with-cervical-pedicle-screw-a-fracture-body-overlapping-reduction-technique
#16
Haemin Chon, Jin Hoon Park
We describe a patient with ankylosing spondylitis (AS) with cervical spinal fracture treated with cervical pedicle screw placement (CPS) through a single posterior approach. A 43-year-old male patient with AS visited our emergency centre due to paralysis following a trauma. Coronal reconstructed cervical spine computed tomography (CT) scan showed a C5 oblique fracture, and the bilateral pedicles were separated superiorly and inferiorly. The sagittal reconstructed CT image revealed bamboo spine and C5 vertebrae body fracture...
April 24, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28460422/effect-of-stem-sizing-and-position-on-short-term-complications-with-canine-press-fit-cementless-total-hip-arthroplasty
#17
Sarah Townsend, Stanley E Kim, Antonio Pozzi
OBJECTIVE: To determine the influence of stem sizing and positioning with early subsidence and stem complications with cementless (BFX) total hip arthroplasty (THA). STUDY DESIGN: Retrospective case series. ANIMALS: Fifty-five dogs; 58 THAs. METHODS: Eighty cobalt-chromium BFX THAs were reviewed, 58 met inclusion criteria. Implant size, positioning, and major complications within 12 months of surgery were recorded. Femoral canal flare (FCF), canal fill, stem angle, and subsidence at 3 months were measured from postoperative radiographs...
April 29, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28460410/comparative-study-for-alignment-of-extramedullary-guides-versus-portable-accelerometer-based-navigation-in-total-knee-arthroplasty
#18
Kazu Matsumoto, Hiroyasu Ogawa, Masashi Fukuta, Nobuyuki Mori, Haruhiko Akiyama
The use of portable, accelerometer-based navigation (PN) devices for positioning of the components of total knee arthroplasty (TKA) is emerging as an alternative to standard extramedullary (EM) systems, which was needed to the image intensifier. The aim of our study was to compare the accuracy of component positioning in TKA using an EM and PN systems. Data from 100 consecutive primary TKAs, performed by multiple surgeons in 87 patients between October 2010 and June 2015, were analyzed. Coronal and sagittal plane alignments of the TKA components, relative to the mechanical axis of the limb, were evaluated by radiography...
May 1, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28447632/a-universal-model-for-solar-eruptions
#19
Peter F Wyper, Spiro K Antiochos, C Richard DeVore
Magnetically driven eruptions on the Sun, from stellar-scale coronal mass ejections to small-scale coronal X-ray and extreme-ultraviolet jets, have frequently been observed to involve the ejection of the highly stressed magnetic flux of a filament. Theoretically, these two phenomena have been thought to arise through very different mechanisms: coronal mass ejections from an ideal (non-dissipative) process, whereby the energy release does not require a change in the magnetic topology, as in the kink or torus instability; and coronal jets from a resistive process involving magnetic reconnection...
April 26, 2017: Nature
https://www.readbyqxmd.com/read/28443166/correlation-between-topographic-parameters-obtained-by-back-surface-topography-based-on-structured-light-and-radiographic-variables-in-the-assessment-of-back-morphology-in-young-patients-with-idiopathic-scoliosis
#20
Laura Pino-Almero, María Fe Mínguez-Rey, Rosa María Cibrián-Ortiz de Anda, María Rosario Salvador-Palmer, Salvador Sentamans-Segarra
STUDY DESIGN: Optical cross-sectional study. PURPOSE: To study the correlation between asymmetry of the back (measured by means of surface topography) and deformity of the spine (quantified by the Cobb angle). OVERVIEW OF LITERATURE: The Cobb angle is considered the gold standard in diagnosis and follow-up of scoliosis but does not correctly characterize the three-dimensional deformity of scoliosis. Furthermore, the exposure to ionizing radiation may cause harmful effects particularly during the growth stage, including breast cancer and other tumors...
April 2017: Asian Spine Journal
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