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https://www.readbyqxmd.com/read/29451648/3-d-finite-element-analysis-of-the-effects-of-post-location-and-loading-location-on-stress-distribution-in-root-canals-of-the-mandibular-1st-molar
#1
Hong Gi Yoon, Hyun Keun Oh, Dong-Yul Lee, Joo-Hee Shin
Objective The purpose of this study was to evaluate, by using finite element analysis, the influence of post location and occlusal loading location on the stress distribution pattern inside the root canals of the mandibular 1st molar. Material and Methods Three different 3-D models of the mandibular 1st molar were established: no post (NP) - a model of endodontic and prosthodontic treatments; mesiobuccal post (MP) - a model of endodontic and prosthodontic treatments with a post in the mesiobuccal canal; and distal post (DP) - a model of endodontic and prosthodontic treatments with a post in the distal canal...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29450974/effect-of-scaling-and-root-planing-on-gingival-crevicular-fluid-cytokine-chemokine-levels-in-smokers-with-chronic-periodontitis-a-systematic-review
#2
REVIEW
Baharak Eshghipour, Hamid Tofighi, Faham Nehal, Fahim Vohra, Fawad Javed, Zohaib Akram
In the present study, the impact of scaling and root planing (SRP) on gingival crevicular fluid (GCF) cytokine/chemokine levels in smokers with chronic periodontitis was assessed. The PICO (population, intervention, comparison, outcome) question was: In smokers with chronic periodontitis (population), what is the effect of SRP (intervention) in comparison to SRP in non-smokers with chronic periodontitis (comparison) on the GCF cytokine/chemokine level (outcome)? Indexed databases were searched up to September 2017...
February 15, 2018: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/29450751/left-lobe-mobilization-strategy-of-right-sided-major-hepatectomy-for-treatment-of-a-tumor-causing-severe-inferior-vena-cava-compression-a-novel-strategy-using-the-modified-liver-hanging-maneuver
#3
Kenichiro Araki, Norio Kubo, Norihiro Ishii, Mariko Tsukagoshi, Takamichi Igarashi, Akira Watanabe, Hiroyuki Kuwano, Ken Shirabe
BACKGROUND: Massive bleeding during major hepatectomy is associated with greater mortality and morbidity.1 Our previous study shows that inferior vena cava (IVC) compression by tumor and an anterior approach without the liver-hanging maneuver (LHM) are risk factors for massive bleeding.2 The LHM is useful for controlling bleeding in deeper parenchymal transection planes.3 However, severe compression of the IVC by tumor makes it difficult to insert a hanging tape.4 The study shows a novel modified LHM strategy for severe IVC compression to minimize intraoperative bleeding...
February 14, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29442626/synthesis-of-copper-nanowires-and-their-antimicrobial-activity-on-strains-isolated-persistent-endodontic-infections
#4
G Sánchez-Sanhueza, S Rebolledo, J López, M Encalada, H Bello-Toledo, D Rojas, C Medinam, M F Melendrez
Copper nanowires, Cu-NWs may have a good antimicrobial effect in endodontic treatment. The objective of this work was to synthesize, characterize and evaluate the antibacterial activity of Cu-NWs on strains obtained from human root canal. A wide distribution of Cu-NWs diameters from 30 to 90 nm was obtained with lengths ranging from 5 to 40 μm. Structural analysis of Cu-NWs showed crystalline planes, which corresponded to Cu, with preferential growth in the direction [110]. The geometric mean MICs was of 289...
July 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442464/effects-of-vector-ultrasonic-system-debridement-and-conventional-instrumentation-on-the-levels-of-tnf-%C3%AE-in-gingival-crevicular-fluid-of-patients-with-chronic-periodontitis
#5
Osman Fatih Arpağ, Ahmet Dağ, Bozan Serhat İzol, Gülcan Cimitay, Ersin Uysal
BACKGROUND: Tumor necrosis factor alpha (TNF-α) is an inflammatory mediator whose levels are increased in the gingival crevicular fluid and blood serum in the case of chronic periodontitis. OBJECTIVES: The aim of this study was to determine the effect of vector ultrasonic system (VUS) on the levels of TNF-α in gingival crevicular fluid (GCF) and the clinical parameters in patients with chronic periodontitis. MATERIAL AND METHODS: The study protocol was conducted using split-mouth design in 30 patients with chronic periodontitis...
December 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29440786/effect-of-scaling-and-root-planing-on-levels-of-8-hydroxydeoxyguanosine-in-gingival-crevicular-fluid-of-chronic-periodontitis-patients-with-and-without-type-ii-diabetes-mellitus
#6
Maria Subash Aaron Muthuraj, Srihari Janakiram, Koshy Chithresan, Arun Parappa Maradi, Praveen Krishna Maddur, Rajesh Rangaraju
Context: Chronic periodontitis (CP) and diabetes mellitus are associated with increased oxidative damage to DNA with formation of 8-hydroxydeoxyguanosine (8-OHdG). The aim of this study was to evaluate the change in gingival crevicular fluid (GCF) levels of 8-OHdG and glycosylated hemoglobin (HbA1c) by 3 months after scaling and root planing (SRP), in CP patients with and without Type II diabetes mellitus. Settings and Design: Sixteen patients with CP, 16 patients with CP and Type II diabetes mellitus (CP-D), and 16 systemically healthy individuals with clinically healthy periodontium who served as controls were included in the study...
May 2017: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/29432640/diamond-burs-versus-curettes-in-root-planing-a-randomized-clinical-trial
#7
Fatma Türktekin, Nurcan Buduneli, David F Lappin, Tuğba Türk, Eralp Buduneli
AIM: This study compares diamond burs and curettes by clinical, microbiological, biochemical, scanning electron microscopic parameters and treatment time data in the non-surgical periodontal treatment of patients with chronic periodontitis. METHODS: Two quadrants of each of the 12 patients received root planing with diamond burs whereas other 2 quadrants were treated with curettes. Clinical periodontal measurements were recorded at baseline and then 1, 3, 6 months after completion of non-surgical periodontal treatment...
February 12, 2018: Australian Dental Journal
https://www.readbyqxmd.com/read/29429056/histological-healing-after-nonsurgical-periodontal-treatment-with-enamel-matrix-derivatives-in-canine-experimental-periodontitis
#8
Ammar Shujaa Addin, Tatsuya Akizuki, Takanori Matsuura, Shu Hoshi, Takahiro Ikawa, Kiichi Maruyama, Wataru Ono, Shunsuke Fukuba, Yuichi Izumi
The histological outcomes after nonsurgical periodontal treatment with enamel matrix derivatives (EMD) remain controversial. The present study evaluated periodontal wound healing after scaling and root planing (SRP) with subgingival application of EMD for treatment of experimental periodontitis. Periodontal breakdown was induced by applying silk ligatures around mandibular third and fourth premolars of six beagle dogs until radiographic bone loss progressed to approximately half of the root length. Probing pocket depth (PPD) and clinical attachment level (CAL) were proximally measured 2 weeks after ligature removal (baseline)...
February 10, 2018: Odontology
https://www.readbyqxmd.com/read/29427147/anatomical-relation-between-the-accessory-process-and-pedicle-in-the-lumbar-vertebrae
#9
Ryutaro Shiboi, Shogo Hayashi, Shinichi Kawata, Zhong-Lian Li, Philipp Pieroh, Hisashi Koga, Yuichi Takano, Hirohiko Inanami, Masahiro Itoh
The pedicle screw is one of the most common medical devices used in spinal surgery. Although there are well-established insertion points based on anatomical landmarks, such as the mammillary process and the transverse process, morphological data on the relationship between the accessory process and the pedicle are still scarce. To clarify this relationship, we recruited 50 cases of hernia of lumbar intervertebral disc, diagnosed using three-dimensional computed tomography of the lumbar vertebrae. We identified the pedicle isthmus in a transverse plane parallel to the upper endplate and measured the angles and distances from the tip of the accessory process to the intersection points at the medial or lateral surface, or at the midpoint between the two intersection points...
February 9, 2018: Anatomical Science International
https://www.readbyqxmd.com/read/29405126/evaluation-of-the-uf-nci-hybrid-computational-phantoms-for-use-in-organ-dosimetry-of-pediatric-patients-undergoing-fluoroscopically-guided-cardiac-procedures
#10
Emily L Marshall, David Borrego, Trung Tran, James C Fudge, Wesley E Bolch
Epidemiologic data demonstrate that pediatric patients face a higher relative risk of radiation induced cancers than their adult counterparts at equivalent exposures. Infants and children with congenital heart defects are a critical patient population exposed to ionizing radiation during life-saving procedures. These patients will likely incur numerous procedures throughout their lifespan, each time increasing their cumulative radiation absorbed dose. As continued improvements in long-term prognosis of congenital heart defect patients is achieved, a better understanding of organ radiation dose following treatment becomes increasingly vital...
February 6, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29400674/reproducibility-of-gait-kinematics-and-kinetics-in-chronic-stroke-patients
#11
Styliani Fotiadou, Nikolaos Aggeloussis, Vassilios Gourgoulis, Paraskevi Malliou, Nikolaos Papanas, Erasmia Giannakou, Ioannis Iliopoulos, Konstantinos Vadikolias, Aikaterini Terzoudi, Haritomeni Piperidou
BACKGROUND: The search for reliable techniques to assess gait in stroke patients is crucial for the design and follow-up of rehabilitation programs. OBJECTIVE: To assess the reproducibility of kinematic and kinetic gait parameters in chronic stroke patients using a three-dimensional gait analysis system. METHODS: Ten chronic stroke patients were assessed while walking along a 20 m walkway at their natural speed, using a gait analysis system of six infrared cameras and two force plates...
2018: NeuroRehabilitation
https://www.readbyqxmd.com/read/29398529/a-sonographic-investigation-for-the-development-of-ultrasound-guided-paravertebral-brachial-plexus-block-in-dogs-cadaveric-study
#12
Paolo Monticelli, Ella Fitzgerald, Jaime Viscasillas
OBJECTIVE: To describe a novel in-plane ultrasound (US)-guided approach to the sixth (C6), seventh (C7), eighth (C8) cervical and to the first thoracic (T1) spinal nerves. STUDY DESIGN: Prospective, descriptive, experimental anatomic study. ANIMALS: A total of seven canine Beagle cadavers. METHODS: Phase 1: One cadaver was used to define bony landmarks for the C6-T1 spinal nerves using computed tomography (CT) and magnetic resonance imaging...
September 15, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29390529/comparison-of-clinical-parameters-microbiological-effects-and-calprotectin-counts-in-gingival-crevicular-fluid-between-er-yag-laser-and-conventional-periodontal-therapies-a-split-mouth-single-blinded-randomized-controlled-trial
#13
Yue Wang, Weiwei Li, Li Shi, Fengqiu Zhang, Sun Zheng
BACKGROUND: The erbium-doped yttrium, aluminum, and garnet (Er:YAG) laser is thought to be the most promising laser for periodontal treatment; however, its application is still under consideration. The aim of this study was to compare Er:YAG laser monotherapy with conventional scaling and root planing (SRP) for chronic periodontitis using clinical parameters, the detection rate of periodontal pathogens, and the calprotectin level in gingival crevicular fluid. METHODS: Twenty-seven participants with moderate-to-advanced chronic periodontitis were included...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29387444/comparison-of-standing-postural-control-and-gait-parameters-in-people-with-and-without-chronic-low-back-pain-a-cross-sectional-case-control-study
#14
Catharine Siân MacRae, Duncan Critchley, Jeremy S Lewis, Adam Shortland
Objective: Differences in postural control and gait have been identified between people with and without chronic low back pain (CLBP); however, many previous studies present data from small samples, or have used methodologies with questionable reliability. This study, employing robust methodology, hypothesised that there would be a difference in postural control, and spatiotemporal parameters of gait in people with CLBP compared with asymptomatic individuals. Methods: This cross-sectional case-control study age-matched and gender-matched 16 CLBP and 16 asymptomatic participants...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29386772/assessment-of-the-number-of-root-canals-in-the-maxillary-and-mandibular-molars-a-radiographic-study-using-cone-beam-computed-tomography
#15
Roopashri Rajesh Kashyap, Siri Parvathi Beedubail, Raghavendra Kini, Prasanna Kumar Rao
Context: The identification of root canals plays an important role in successful endodontic diagnosis and treatment. An inappropriate identification of canal resulting in incomplete removal of pulp tissue from the root canals is the main reason for the failure of endodontic treatment in molars. Radiographic imaging is an essential investigative tool in successful endodontics. Cone beam computed tomography (CBCT) the imaging is relatively a new method to visualize the roots in all the three planes...
September 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29384743/forensic-age-estimation-based-on-development-of-third-molars-a-staging-technique-for-magnetic-resonance-imaging
#16
J De Tobel, I Phlypo, S Fieuws, C Politis, K L Verstraete, P W Thevissen
BACKGROUND: The development of third molars can be evaluated with medical imaging to estimate age in subadults. The appearance of third molars on magnetic resonance imaging (MRI) differs greatly from that on radiographs. Therefore a specific staging technique is necessary to classify third molar development on MRI and to apply it for age estimation. AIM: To develop a specific staging technique to register third molar development on MRI and to evaluate its performance for age estimation in subadults...
December 1, 2017: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/29364340/microbiological-and-clinical-effects-of-probiotics-and-antibiotics-on-nonsurgical-treatment-of-chronic-periodontitis-a-randomized-placebo-controlled-trial-with-9-month-follow-up
#17
Alicia Morales, Alessandro Gandolfo, Joel Bravo, Paola Carvajal, Nora Silva, Claudia Godoy, Jocelyn Garcia-Sesnich, Anilei Hoare, Patricia Diaz, Jorge Gamonal
The aim of this double-blind, placebo-controlled and parallel- arm randomized clinical trial was to evaluate the effects of Lactobacillus rhamnosus SP1-containing probiotic sachet and azithromycin tablets as an adjunct to nonsurgical therapy in clinical parameters and in presence and levels of Tannerella forsythia, Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans. Forty-seven systemically healthy volunteers with chronic periodontitis were recruited and monitored clinically and microbiologically at baseline for 3, 6 and 9 months after therapy...
January 18, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29363964/redox-potentials-for-tetraplatin-satraplatin-its-derivatives-and-ascorbic-acid-a-computational-study
#18
Filip Šebesta, Katarína Baxová, Jaroslav V Burda
Redox potentials of the Pt(IV) complexes, such as satraplatin, tetraplatin, and several others, are determined at the density functional theory (DFT) level (with B3LYP, ω-B97XD, PBE1PBE, TPSSTPSS, M06-L, M11-L, and MN12-L functionals) and compared with post-Hartree-Fock methods MP2 and CCSD(T). Calculations are performed in water solution employing an implicit solvation model. The impact of replacement of a chloro ligand by a water molecule (hydration in the equatorial plane of the complexes) is also explored...
January 24, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29363762/a-comparison-of-prostate-tumor-targeting-strategies-using-magnetic-resonance-imaging-targeted-transrectal-ultrasound-guided-fusion-biopsy
#19
Peter R Martin, Derek W Cool, Aaron Fenster, Aaron D Ward
PURPOSE: Magnetic resonance imaging (MRI)-targeted, 3D transrectal ultrasound (TRUS)-guided prostate biopsy aims to reduce the 21-47% false negative rate of clinical 2D TRUS-guided systematic biopsy, but continues to yield false negative results. This may be improved via needle target optimization, accounting for guidance system errors and image registration errors. As an initial step toward the goal of optimized prostate biopsy targeting, we investigated how needle delivery error impacts tumor sampling probability for two targeting strategies...
January 24, 2018: Medical Physics
https://www.readbyqxmd.com/read/29362410/new-live-screening-of-plant-nematode-interactions-in-the-rhizosphere
#20
Felicity E O'Callaghan, Roberto A Braga, Roy Neilson, Stuart A MacFarlane, Lionel X Dupuy
Free living nematodes (FLN) are microscopic worms found in all soils. While many FLN species are beneficial to crops, some species cause significant damage by feeding on roots and vectoring viruses. With the planned legislative removal of traditionally used chemical treatments, identification of new ways to manage FLN populations has become a high priority. For this, more powerful screening systems are required to rapidly assess threats to crops and identify treatments efficiently. Here, we have developed new live assays for testing nematode responses to treatment by combining transparent soil microcosms, a new light sheet imaging technique termed Biospeckle Selective Plane Illumination Microscopy (BSPIM) for fast nematode detection, and Confocal Laser Scanning Microscopy for high resolution imaging...
January 23, 2018: Scientific Reports
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