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https://www.readbyqxmd.com/read/29109318/extrusion-of-debris-from-primary-molar-root-canals-following-instrumentation-with-traditional-and-new-file-systems
#1
Bhagyashree Thakur, Ajinkya M Pawar, Anda Kfir, Prasanna Neelakantan
INTRODUCTION: To assess the amount of debris extruded apically during instrumentation of distal canals of extracted primary molars by three instrument systems [ProTaper Universal (PTU), ProTaper NEXT (PTN), and self-adjusting file (SAF)] compared with conventional stainless steel hand K-files (HF, control). MATERIALS AND METHODS: Primary mandibular molars (n = 120) with a single distal canal were selected and randomly divided into four groups (n = 30) for root canal instrumentation using group I, HF (to size 0...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29098243/-evaluation-of-the-efficacy-of-two-kinds-of-niti-retreatment-instruments-for-removing-filling-material-during-root-canal-retreatment
#2
Jin-Heng Li, Tian-Tian Wu, Hong He, Jun-Li Han
PURPOSE: To compare the efficacy of Mtwo R and Reciproc with that of hand files in removing filling material during root canal retreatment. METHODS: The root canals of forty-five human extracted mandibular central incisors were cleaned and shaped to a size 40 and filled with gutta-percha and sealer using a lateral compaction technique. The teeth were divided into 3 groups. The filling material was removed with hand files, Mtwo R and Reciproc, respectively. The debris extruded out of the apical foramen was collected and weighted...
June 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29045321/fundus-wide-subretinal-and-pigment-epithelial-abnormalities-in-macular-telangiectasia-type-2
#3
Michael B Powner, Sasha M Woods, Meidong Zhu, Mark C Gillies, Paul S Bernstein, Gregory S Hageman, Grant M Comer, Catherine Egan, Marcus Fruttiger
PURPOSE: Macular telangiectasia Type 2 (MacTel) causes glial and photoreceptor cell death in a small, oval patch in the central retina. Beyond this oval area, no disease manifestations have been described so far. Here, we describe a novel pathological aspect of MacTel in the retinal pigment epithelium (RPE) that is not restricted to the clinically affected area but covers the entire retina. METHODS: We have studied postmortem eyes from four patients with MacTel by immunohistochemistry and electron microscopy...
October 17, 2017: Retina
https://www.readbyqxmd.com/read/28967084/the-effect-of-ultrasonically-activated-irrigation-and-laser-based-root-canal-irrigation-methods-on-debris-removal
#4
Aysenur Kamaci, Berdan Aydin, Necdet Erdilek
PURPOSE: To test the efficacy of debris removal of 5 in vitro irrigation protocols: conventional irrigation, irrigation activated by ultrasound, Er:YAG laser with photon-induced photoacoustic streaming (PIPS) tip, and 2 diode laser techniques. METHODS: The root canals of 75 extracted human canine teeth were enlarged and bisected longitudinally. Standardized grooves were prepared 2-6 mm from the root apex and filled with 0.5 mm of dentine debris. The teeth were reassembled and irrigated using 1 of the following techniques (n = 15/technique): (1) conventional irrigation, (2) diode laser irrigation - tip placed 2 mm from working length, (3) diode laser irrigation - tip placed at root canal orifice, (4) Er:YAG laser - PIPS, and (5) ultrasonically activated irrigation...
September 22, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28936288/a-comparative-evaluation-of-smear-layer-removal-using-apical-negative-pressure-endovac-sonic-irrigation-endoactivator-and-er-yag-laser-an-in-vitro-sem-study
#5
Sanghamitra Suman, Promila Verma, Aseem Prakash-Tikku, Rhythm Bains, Vijay Kumar-Shakya
BACKGROUND: This study aimed to compare the smear layer removing efficacy of the EndoActivator, EndoVac and Er:YAG laser in extracted mandibular premolars, at the apical, middle and coronal third of root canal, through scanning electron microscopy. MATERIAL AND METHODS: 40 extracted mandibular premolars were decoronated to a standardized length of 12 mm. Specimens were shaped to ProTaper F4 size and irrigated with 5.25% sodium hypochlorite at 370C between instrumentation...
August 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28912942/efficacy-of-sodium-hypochlorite-activated-with-laser-in-intracanal-smear-layer-removal-an-sem-study
#6
Shahriar Shahriari, Shahin Kasraei, Ghodratollah Roshanaei, Hamed Karkeabadi, Hossein Davanloo
Introduction: The purpose of the present study was to evaluate the different concentrations of sodium hypochlorite activated with laser in removing of the smear layer in the apical, middle, and coronal segments of root canal walls by scanning electron microscopy analysis. Methods: Sixty single-rooted human mandibular teeth were decoronated to a standardized length. The samples were prepared by using Race rotary system to size 40, 0.04 taper and divided into 4 equal groups (n = 15). Group 1, irrigated with EDTA 17% and 5...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/28855758/effect-of-glide-path-preparation-on-apical-extrusion-of-debris-in-root-canals-instrumented-with-three-single-file-systems-an-ex-vivo-comparative-study
#7
Ajinkya M Pawar, Mansing Pawar, Anda Kfir, Bhagyashree Thakur, Pooja Mutha, Kulwinder Singh Banga
AIM: The aim of this study was to test the effect of new protocol of glide path preparation by 20/0.04 rotary file on apical extrusion of debris when instrumenting fine curved mesial canals in mandibular molars with Self-adjusting File (SAF) and compare it to a glide path prepared by 20/0.02 hand K-file and rotary OneShape (OS) and reciprocating WaveOne (WO) file instrumentation. MATERIALS AND METHODS: Sixty mandibular molars with curved mesial roots were selected and randomly divided into three groups (n = 20) for instrumentation...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28855755/comparison-of-apical-debris-extrusion-during-root-canal-preparation-using-instrumentation-techniques-with-two-operating-principles-an-in-vitro-study
#8
Mudita Verma, N Meena, R Anitha Kumari, Sudhanva Mallandur, R Vikram, Vishwas Gowda
AIMS: The aim of this study was to quantify the debris extruded apically from teeth using rotary and reciprocation instrumentation systems. SUBJECTS AND METHODS: Eighty extracted human mandibular premolars with single canals and similar lengths were instrumented using ProTaper Universal (40, 06; Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Next (40, 06; Dentsply Maillefer, Ballaigues, Switzerland), WaveOne (40, 06; Dentsply Maillefer, Ballaigues, Switzerland), and Reciproc (R40; VDW GmbH, Munich, Germany)...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28855748/comparative-evaluation-of-apically-extruded-debris-during-root-canal-instrumentation-using-two-ni-ti-single-file-rotary-systems-an-in-vitro-study
#9
Kiran Singbal, Disha Jain, Kranthi Raja, Tan Ming Hoe
BACKGROUND: Apical extrusion of debris during instrumentation is detrimental to the patient. AIM: The aim of this study was to evaluate the apical extrusion of debris during root canal instrumentation using two single file rotary Ni-Ti systems. MATERIALS AND METHODS: Thirty freshly extracted mandibular premolars with straight roots were sterilized and divided into two groups instrumented using: One Shape rotary Ni-Ti system with Endoflare orifice shaper (Group 1) and Neo-Niti rotary Ni-Ti system with C1 orifice shaper (Group 2)...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28834333/effect-of-large-instrument-use-on-shaping-ability-and-debris-extrusion-of-rotary-and-reciprocating-systems
#10
Elielton L Costa, Emílio C Sponchiado-Júnior, Lucas F R Garcia, André A F Marques
AIM: The aim of the present study was to evaluate the effect of large instrument use on the shaping ability and apical debris extrusion of rotary and reciprocating systems in oval-shaped root canals. METHODS: Forty-five mandibular premolars, with an 18-mm long, oval-shaped single canal, and apical diameter ranging from 300 to 350 μm, were separated into three groups (n=15), according to the system used: ProTaper Universal group, F5 (0.50/0.05); ProTaper Next (PTN group), X5 (0...
August 19, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28821389/debris-buster-is-a-drosophila-scavenger-receptor-essential-for-airway-physiology
#11
Almut Wingen, Pilar Carrera, Olympia Ekaterini Psathaki, André Voelzmann, Achim Paululat, Michael Hoch
Scavenger receptors class B (SR-B) are multifunctional transmembrane proteins, which in vertebrates participate in lipid transport, pathogen clearance, lysosomal delivery and intracellular sorting. Drosophila has 14 SR-B members whose functions are still largely unknown. Here, we reveal a novel role for the SR-B family member Debris buster (Dsb) in Drosophila airway physiology. Larvae lacking dsb show yeast avoidance behavior, hypoxia, and severe growth defects associated with impaired elongation and integrity along the airways...
October 1, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28811882/seasonal-changes-in-leaf-chemistry-and-leaf-selection-of-the-japanese-giant-flying-squirrel-upon-two-tree-species
#12
Mutsumi Ito, Noriko Tamura, Fumio Hayashi
Tree leaves are important food sources for arboreal herbivores, such as primates, rodents, and marsupials. These animals do not eat leaves randomly in habitats with many tree species but rather choose based on the chemical components of leaves, such as sugars, fibers, proteins, and toxins. However, the effects of the microscale distribution of these chemicals within each leaf have not been examined for these animals. The giant flying squirrels Petaurista leucogenys are entirely arboreal, nocturnal herbivores, usually feeding on leaves and dropping leaf debris on the ground after partially consuming them...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28808459/evaluation-of-apically-extruded-debris-during-root-canal-retreatment-using-protaper-next-and-reciproc-in-severely-curved-canals
#13
Giselle Nevares, Kaline Romeiro, Diana Albuquerque, Felipe Xavier, Howard Fogel, Laila Freire, Rodrigo Cunha
INTRODUCTION: To compare the apical extrusion of debris produced during root obturating material removal from severely curved root canals using either Reciproc (REC) or ProTaper Next (PTN) systems. METHODS AND MATERIALS: Twenty-six mesial canals of lower molars were instrumented, filled and allocated into two groups (n=13). Micro-computed tomographic images were performed to determine the root canal configuration (Vertucci's type IV) and initial volume of obturation...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808456/an-in-vitro-comparison-of-apically-extruded-debris-using-reciproc-protaper-universal-neolix-and-hyflex-in-curved-canals
#14
Hossein Labbaf, Kiumars Nazari Moghadam, Shahriar Shahab, Mahshid Mohammadi Bassir, Mohammad Amin Fahimi
INTRODUCTION: As a consequence of root canal preparation, dentinal chips, irrigants and pulp remnants are extruded into preradicular space. This phenomenon may lead to post endodontic flare-ups. The purpose of this study was to compare the amount of extruded debris with four endodontic NiTi engine-driven systems. METHODS AND MATERIALS: Sixty mesiobuccal roots of maxillary molars with 15-30˚ curvature were divided randomly into four groups (n=15). Each group was instrumented up to apical size of 25 using Reciproc, ProTaper Universal, Neolix and Hyflex...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28782092/hard-tissue-debris-removal-from-the-mesial-root-canal-system-of-mandibular-molars-with-ultrasonically-and-laser-activated-irrigation-a-micro-computed-tomography-study
#15
J Verstraeten, W Jacquet, R J G De Moor, M A Meire
This study is to investigate the efficacy of different irrigant activation techniques on removal of accumulated hard tissue debris (AHTD) in mesial roots of human mandibular molars. Extracted human mandibular molars with an isthmus between the mesial root canals were selected based on micro-CT (μCT) scans. The mesial canals were instrumented to an apical diameter ISO30 using ProTaper rotary files. Teeth were randomly assigned to three irrigant activation groups (n = 10): ultrasonically activated irrigation (UAI) using a size 20 Irrisafe for 3 × 20 s, laser-activated irrigation (LAI) with an Er:YAG laser (2940 nm) and plain 300 μm fiber tip inside the canal (20 mJ, 20 Hz, 3 × 20 s), and laser-activated irrigation with identical parameters with a 400 μm photon-induced photoacoustic streaming (PIPS) tip held at the canal entrance...
December 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28775098/influenza-virus-infection-alters-ion-channel-function-of-airway-and-alveolar-cells-mechanisms-and-physiological-sequelae
#16
James D Londino, Ahmed Lazrak, James F Collawn, Zsuzsanna Bebok, Kevin S Harrod, Sadis Matalon
The cystic fibrosis transmembrane conductance regulator (CFTR) and the amiloride-sensitive epithelial sodium channels (ENaC) are located in the apical membranes of airway and alveolar epithelial cells. These transporters play an important role in the regulation of lung fluid balance across airway and alveolar epithelia by being the conduits for chloride (Cl(-)) and bicarbonate (HCO3(-)) secretion and sodium (Na(+)) ion absorption, respectively. The functional role of these channels in the respiratory tract is to maintain the optimum volume and ionic composition of the bronchial pericilary fluid (PCL) and alveolar lining fluid (ALF) layers...
August 3, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28761250/apical-extrusion-of-debris-in-four-different-endodontic-instrumentation-systems-a-meta-analysis
#17
J Sylvia Western, Daniel Devaprakash Dicksit
BACKGROUND: All endodontic instrumentation systems tested so far, promote apical extrusion of debris, which is one of the main causes of postoperative pain, flare ups, and delayed healing. OBJECTIVES: Of this meta-analysis was to collect and analyze in vitro studies quantifying apically extruded debris while using Hand ProTaper (manual), ProTaper Universal (rotary), Wave One (reciprocating), and self-adjusting file (SAF; vibratory) endodontic instrumentation systems and to determine methods which produced lesser extrusion of debris apically...
January 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28739013/influence-of-access-cavity-design-on-root-canal-detection-instrumentation-efficacy-and-fracture-resistance-assessed-in-maxillary-molars
#18
Gabriela Rover, Felipe Gonçalves Belladonna, Eduardo Antunes Bortoluzzi, Gustavo De-Deus, Emmanuel João Nogueira Leal Silva, Cleonice Silveira Teixeira
INTRODUCTION: The aim of this study was to assess the influence of contracted endodontic cavities (CECs) on root canal detection, instrumentation efficacy, and fracture resistance assessed in maxillary molars. Traditional endodontic cavities (TECs) were used as a reference for comparison. METHODS: Thirty extracted intact maxillary first molars were scanned with micro-computed tomographic imaging at a resolution of 21 μm, assigned to the CEC or TEC group (n = 15/group), and accessed accordingly...
October 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28735794/influence-of-different-kinematics-on-apical-extrusion-of-irrigant-and-debris-during-canal-preparation-using-k3xf-instruments
#19
Mustafa Toyoğlu, Demet Altunbaş
INTRODUCTION: This in vitro study was designed to evaluate the amount of apically extruded irrigant and debris during root canal preparation using K3XF instruments (SybronEndo, Orange, CA) with different kinematics and using hand files with a step-back technique. METHODS: A total of 80 extracted mandibular premolars were selected and randomly assigned to 4 groups (n = 20). The root canals were instrumented with K-type stainless steel instruments using a step-back technique and with the K3XF system using the following kinematics: reciprocating motion, adaptive motion, and continuous rotation...
July 20, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28708251/efficacy-of-photon-initiated-photoacoustic-streaming-on-apically-extruded-debris-with-different-preparation-systems-in-curved-canals
#20
D Arslan, A Kustarci
AIM: To determine the effect of photon-initiated photoacoustic streaming (PIPS) on the extrusion of debris using multiple-file (ProTaper Next-PTN) and single-file (One Shape-OS) continuous rotary systems in curved canals in human molar teeth. METHODOLOGY: Sixty extracted maxillary first molar teeth with curved mesial roots, mature apices and of similar lengths were selected. Teeth having canals with apical diameters larger than size 15 were discarded. The teeth were randomly divided into four experimental groups (n = 15 teeth per group) according to the file used and irrigation systems: (i) OS with PIPS with a 2940 nm Er:YAG laser (0...
July 14, 2017: International Endodontic Journal
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