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https://www.readbyqxmd.com/read/28339790/does-systemic-administration-of-casein-phosphopeptides-affect-orthodontic-movement-and-root-resorption-in-rats
#1
Lachlan Crowther, Gang Shen, Mohammed Almuzian, Allan Jones, William Walsh, Rema Oliver, Peter Petocz, Nour E Tarraf, M Ali Darendeliler
Objectives: To assess the potential effects of casein phosphopeptides (CPPs) on orthodontically induced iatrogenic root resorption (OIIRR) and orthodontic teeth movement. Materials and methods: Forty Wistar rats (aged 11 weeks) were randomly divided into experimental group (EG; n = 20) that received a diet supplemented with CPP and control group (CG; n = 20) devoid of diet supplement. A 150 g force was applied using nickel titanium (NiTi) coil that was bonded on maxillary incisors and extended unilaterally to a maxillary first molar...
January 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28339591/comparison-of-the-force-levels-among-labial-and-lingual-self-ligating-and-conventional-brackets-in-simulated-misaligned-teeth
#2
Ahmad Alobeid, Tarek El-Bialy, Said Khawatmi, Cornelius Dirk, Andreas Jäger, Christoph Bourauel
Background/objective: The aim of this study was to evaluate force levels exerted by levelling arch wires with labial and lingual conventional and self-ligating brackets. Materials/methods: The tested orthodontic brackets were of the 0.022-in slot size for labial and 0.018-in for lingual brackets and were as follows: 1. Labial brackets: (i) conventional bracket (GAC-Twin, Dentsply), (ii) passive self-ligating (SL) brackets (Damon-Q®, ORMCO; Ortho classic H4™, Orthoclassic; FLI®SL, Rocky Mountain Orthodontics) and (iii) active SL brackets (GAC In-Ovation®C, DENTSPLY and SPEED™, Strite)...
January 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28336274/characterization-molecular-docking-dynamics-simulation-and-metadynamics-of-kisspeptin-receptor-with-kisspeptin
#3
Mohd Ashraf Rather, Syed Hussain Basha, Irfan Ahmad Bhat, Niti Sharma, Priyanka Nandanpawar, Mohan Badhe, Gireesh-Babu P, Aparna Chaudhari, Jitendra Kumar Sundaray, Rupam Sharma
We report molecular characterization of the kisspeptin receptor (kiss1r), an essential gatekeeper for reproduction and onset of puberty in vertebrates. The full-length cDNA sequence of kiss1r is 1786bp which consist of 5' UTR (untranslated region) 261bp, 3' UTR of 424bp and open reading frame of 1101 encoding a putative protein of 366 amino acids. Basal tissue expression pattern of kiss1r mRNA revealed that it is mainly expressed in the brain and testis. We also report the structure of the kiss1r, along with plausible activation mechanism of this receptor by kisspeptin using computational modelling and dynamic simulation approach of multiple 100ns of timescale...
March 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28331143/chopstick-injury-successful-stent-graft-therapy-for-traumatic-left-subclavian-artery-aneurysm
#4
Tatsuo Ueda, Hiroyuki Tajima, Satoru Murata, Ryo Takagi, Hiroyuki Yokota, Shin-Ichiro Kumita
Traumatic chopstick injury is very rare, especially in the vascular system. We present an unusual case of a 19-year-old man who presented at the emergency department after being stabbed with a chopstick by his elder brother. Computed tomography revealed a left subclavian artery pseudoaneurysm, which increased from 4 mm to 7 mm in diameter within 47 days. We successfully deployed a Niti-S stent graft for the increasing aneurysm, thereby avoiding a surgical operation. Balloon angioplasty was added for re-stenosis 8 months after the first intervention...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28329438/influence-of-clinical-use-on-physical-structural-surface-properties-and-electrochemical-potential-of-niti-endodontic-instruments
#5
E S J Pereira, C C F Amaral, J A P Gomes, O A Peters, V T L Buono, M G A Bahia
AIM: To investigate the surface morphology and electrochemical potential of superelastic (SE), M-Wire (MW), and shape memory technology (SMT) NiTi instruments before and after single clinical use in vivo. METHODOLOGY: A total of 60 ProTaper Universal F2 (PTU - SE), ProTaper Next X2 (PTN - MW), Typhoon (TYP), Hyflex (HF) and Vortex Blue (VB), the last three SMT, and size 25, .06 taper (n = 6 of each type) files were examined. Scanning electron microscopy (SEM), X-ray energy-dispersive spectroscopy (EDS) and electrochemical potential analysis were employed before and after clinical use...
March 22, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28302945/the-incidence-of-dentinal-cracks-during-root-canal-preparations-with-reciprocating-single-file-and-rotary-file-systems-a-meta-analysis
#6
Xi Wei, Bo Hu, Haiyang Peng, Ming Tang, Jinlin Song
As a dangerous factor in vertical root fracture, dentinal crack formation is often associated with root canal instruments. We conducted this meta-analysis to compare the influence of two types of nickel titanium (NiTi) instruments that have different movements (reciprocating single-file versus full-sequence rotary file systems) on dentinal cracks formation during root canal preparation. Searches were conducted in PubMed, ISI Web of Knowledge, Embase and Cochrane Library using a combination of keywords. Titles and abstracts of all articles were independently assessed by two reviewers in accordance with the predefined inclusion criteria...
March 8, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28301016/deflection-and-flexural-strength-effects-on-the-roughness-of-aesthetic-coated-orthodontic-wires
#7
Cibele Gonçalves de Albuquerque, Américo Bortolazzo Correr, Giovana Cherubini Venezian, Milton Santamaria, Carlos Alberto Tubel, Silvia Amélia Scudeler Vedovello
The aim was to evaluate the flexural strength and the effects of deflection on the surface roughness of esthetic orthodontic wires. The sample consisted of 70 archwire 0.014-inch: polytetrafluorethylene (PTFE)-coated Nickel-Titanium (Niti) archwires (Titanol Cosmetic-TC, Flexy Super Elastic Esthetic-FSE, esthetic Nickel Titanium Wire-ANT); epoxy resin-coated Niti archwires (Spectra-S, Niticosmetic-TEC); gold and rhodium coated Niti (Sentalloy-STC) and a control group (superelastic Niti (Nitinol-NS). The initial roughness was evaluated with a rugosimeter...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28295440/role-of-hdlive-in-imaging-the-fetal-heart
#8
Selvaraj Ravi Lakshmy, Bharat Jain, Nity Rose
HDLive is a rendering methodology that generates realistic images of the human fetus from sonographic data. The objective of this study is to demonstrate the utility of high-definition live in evaluating fetal heart especially in the first trimester (11-14-week) scan. The normal atrioventricular valve and its abnormalities along with septal defects can be vividly demonstrated with this technique, and eight cases with cardiac defects are illustrated. Its use in the first-trimester evaluation of heart would give a better perspective of the cardiac malformation, which provides the opportunity for counseling options early in pregnancy...
March 11, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28292599/shaping-ability-of-reciproc-waveone-gold-and-hyflex-edm-single-file-systems-in-simulated-s-shaped-canals
#9
Taha Özyürek, Koray Yılmaz, Gülşah Uslu
INTRODUCTION: The aim of the present study was to compare the shaping ability of Reciproc (RPC; VDW, Munich, Germany), HyFlex EDM (HEDM; Coltene/Whaledent AG, Altstätten, Switzerland), and WaveOne GOLD (WOG; Dentsply Maillefer, Ballaigues, Switzerland) nickel-titanium (NiTi) files made of different NiTi alloys in S-shaped simulated canals. METHODS: Sixty S-shaped canals in resin blocks were prepared to an apical size of 0.25 mm using RPC R25, WOG Primary, and HEDM OneFile (n = 20 canal/per group) systems...
March 11, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28274036/effect-of-instrumentation-length-and-instrumentation-systems-hand-versus-rotary-files-on-apical-crack-formation-an-in-vitro-study
#10
Madhuri R Devale, M C Mahesh, Shreetha Bhandary
INTRODUCTION: Stresses generated during root canal instrumentation have been reported to cause apical cracks. The smaller, less pronounced defects like cracks can later propagate into vertical root fracture, when the tooth is subjected to repeated stresses from endodontic or restorative procedures. AIM: This study evaluated occurrence of apical cracks with stainless steel hand files, rotary NiTi RaCe and K3 files at two different instrumentation lengths. MATERIALS AND METHODS: In the present in vitro study, 60 mandibular premolars were mounted in resin blocks with simulated periodontal ligament...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28269631/shape-memory-alloy-smart-knee-spacer-to-enhance-knee-functionality-model-design-and-finite-element-analysis
#11
Arvind Gautam, A Bhargavi Rani, Miguel A Callejas, Swati Ghosh Acharyya, Amit Acharyya, Dwaipayan Biswas, Vasundhra Bhandari, Paresh Sharma, Ganesh R Naik
In this paper we introduce Shape Memory Alloy (SMA) for designing the tibial part of Total Knee Arthroplasty (TKA) by exploiting the shape-memory and pseudo-elasticity property of the SMA (e.g. NiTi). This would eliminate the drawbacks of the state-of-the art PMMA based knee-spacer including fracture, sustainability, dislocation, tilting, translation and subluxation for tackling the Osteoarthritis especially for the aged people of 45-plus or the athletes. In this paper a Computer Aided Design (CAD) model using SolidWorks for the knee-spacer is presented based on the proposed SMA adopting the state-of-the art industry-standard geometry that is used in the PMMA based spacer design...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28258269/ion-release-and-galvanic-corrosion-of-different-orthodontic-brackets-and-wires-in-artificial-saliva
#12
Soodeh Tahmasbi, Tahereh Sheikh, Yasamin B Hemmati
INTRODUCTION: To investigate the galvanic corrosion of brackets manufactured by four different companies coupled with stainless steel (SS) or nickel-titanium (NiTi) wires in an artificial saliva solution. MATERIALS AND METHODS: A total of 24 mandibular central incisor Roth brackets of four different manufacturers (American Orthodontics, Dentaurum, Shinye, ORJ) were used in this experimental study. These brackets were immersed in artificial saliva along with SS or NiTi orthodontic wires (0...
March 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28256485/evaluation-of-various-filling-techniques-in-distal-canals-of-mandibular-molars-instrumented-with-different-single-file-nickel-titanium-systems
#13
A Dumani, S Yilmaz, O Yoldas, C Kuden
BACKGROUND AND AIMS: The aim of this study was to evaluate the quality of various filling techniques in distal canals of mandibular molars instrumented with different single-file nickel-titanium (NiTi) systems. MATERIALS AND METHODS: A total of 150 distal roots of mandibular molar teeth were randomly assigned into three main groups and instrumented by using Reciproc (VDW, Munich, Germany), WaveOne (Dentsply Tulsa, Tulsa, OK, USA), or One Shape (MicroMega, Besancon, France) NiTi file systems...
March 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28252303/electroassisted-functionalization-of-nitinol-surface-a-powerful-strategy-for-polymer-coating-through-controlled-radical-surface-initiation
#14
Bastien Arrotin, Joseph Delhalle, Philippe Dubois, Laetitia Mespouille, Zineb Mekhalif
Coating Nitinol (NiTi) surfaces with a polymer layer has become very appealing in the past few years owing to its increased attraction in the biomedical field. Although its intrinsic properties helped ensure its popularity, its extensive implementation is still hampered by its nickel inclusion, making it sensitive to pitting corrosion and therefore leading to the release of carcinogenic Ni(2+) ions. Among all recent ways to modify NiTi surfaces, elaboration of self-assembled monolayers is of great interest as their high order confers a reinforcement of the metal surface corrosion resistance and brings new functionalities to the metal for postmodification processes...
March 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28250040/safety-assessment-of-two-hybrid-instrumentation-techniques-in-a-dental-student-endodontic-clinic-a-retrospective-study
#15
Marcelo Santos Coelho, Steven John Card, Peter Zahi Tawil
The aim of this study was to retrospectively assess the safety potential of a hybrid technique combining nickel-titanium (NiTi) reciprocating and rotary instruments by third- and fourth-year dental students in the predoctoral endodontics clinic at one U.S. dental school. For the study, 3,194 root canal treatments performed by 317 dental students from 2012 through 2015 were evaluated for incidence of ledge creation and instrument separation. The hybrid reciprocating and rotary technique (RRT) consisted of a glide path creation with stainless steel hand files up to size 15/02, a crown down preparation with a NiTi reciprocating instrument, and an apical preparation with NiTi rotary instruments...
March 2017: Journal of Dental Education
https://www.readbyqxmd.com/read/28248431/resistance-to-cyclic-fatigue-of-pathfile-scoutrace-and-proglider-glide-path-files-in-an-s-shaped-canal
#16
H S Topçuoğlu, G Topçuoğlu, S Düzgün
AIM: To compare the cyclic fatigue resistance (CFR) of PathFile, ProGlider, and ScoutRaCe nickel-titanium (NiTi) rotary instruments used in an S-shaped artificial canal. METHODOLOGY: A total of 90 instruments were tested in an S-shaped artificial canal (n = 30 for each group: PathFile (size 16, 2% constant taper), ProGlider (size 16, variable taper between 2% and 8% along the shaft), and ScoutRaCe (size 15, 2% constant taper). All files were rotated until fracture...
March 1, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28245933/greening-and-browning-of-the-himalaya-spatial-patterns-and-the-role-of-climatic-change-and-human-drivers
#17
Niti B Mishra, Kumar P Mainali
The reliable detection and attribution of changes in vegetation greenness is a prerequisite for the development of strategies for the sustainable management of ecosystems. We conducted a robust trend analysis on remote sensing derived vegetation index time-series matrices to detect significant changes in inter-annual vegetation productivity (greening versus browning) for the entire Himalaya, a biodiverse and ecologically sensitive yet understudied region. The spatial variability in trend was assessed considering elevation, 12 dominant land cover/use types and 10 ecoregions...
February 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28243866/measuring-3d-orthodontic-actions-to-guide-clinical-treatments-involving-coil-springs-and-miniscrews
#18
Margherita Mencattelli, Elisa Donati, Pasqua Spinelli, Massimo Cultrone, Cesare Luzi, Daniele Cantarella, Cesare Stefanini
The understanding of the phenomena at the base of tooth movement, due to orthodontic therapy, is an ambitious topic especially with regard to the "optimal forces" able to move teeth without causing irreversible tissue damages. To this aim, a measuring platform for detecting 3D orthodontic actions has been developed. It consists of customized load cells and dedicated acquisition electronics. The force sensors are able to detect, simultaneously and independently of each other, the six orthodontic components which a tooth is affected by...
March 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28240758/the-influence-of-a-new-clinical-motion-for-endodontic-instruments-on-the-incidence-of-postoperative-pain
#19
G Gambarini, D Di Nardo, G Miccoli, F Guerra, R Di Giorgio, G Di Giorgio, G Glassman, L Piasecki, L Testarelli
OBJECTIVES: Previous studies showed that motor motions play an important role in determining apical extrusion of debris. Therefore a new clinical motion (MIMERACI) has been proposed. The basic idea is to progress slowly (1mm advancement), and after each 1mm, to remove the instrument from the canal, clean flutes and irrigate. The aim of the study was to prove whether the clinical use of MIMERACI technique would influence or not postoperative pain. MATERIALS AND METHODS: 100 teeth requesting endodontic treatment were selected for the study and divided into two similar groups based on anatomy, pre-operative symptoms and vitality, presence or absence of periapical lesion...
January 2017: La Clinica Terapeutica
https://www.readbyqxmd.com/read/28227889/shape-memory-alloy-smart-knee-spacer-to-enhance-knee-functionality-model-design-and-finite-element-analysis
#20
Arvind Gautam, A Bhargavi Rani, Miguel A Callejas, Swati Ghosh Acharyya, Amit Acharyya, Dwaipayan Biswas, Vasundhra Bhandari, Paresh Sharma, Ganesh R Naik, Arvind Gautam, A Bhargavi Rani, Miguel A Callejas, Swati Ghosh Acharyya, Amit Acharyya, Dwaipayan Biswas, Vasundhra Bhandari, Paresh Sharma, Ganesh R Naik, Swati Ghosh Acharyya, Paresh Sharma, Vasundhra Bhandari, A Bhargavi Rani, Arvind Gautam, Dwaipayan Biswas, Miguel A Callejas, Amit Acharyya
In this paper we introduce Shape Memory Alloy (SMA) for designing the tibial part of Total Knee Arthroplasty (TKA) by exploiting the shape-memory and pseudo-elasticity property of the SMA (e.g. NiTi). This would eliminate the drawbacks of the state-of-the art PMMA based knee-spacer including fracture, sustainability, dislocation, tilting, translation and subluxation for tackling the Osteoarthritis especially for the aged people of 45-plus or the athletes. In this paper a Computer Aided Design (CAD) model using SolidWorks for the knee-spacer is presented based on the proposed SMA adopting the state-of-the art industry-standard geometry that is used in the PMMA based spacer design...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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