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Apical debris

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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
#1
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...
August 7, 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
#2
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
#3
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
#4
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...
July 21, 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
#5
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
#6
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
https://www.readbyqxmd.com/read/28608053/apical-extrusion-of-debris-during-the-preparation-of-oval-root-canals-a-comparative-study-between-a-full-sequence-saf-system-and-a-rotary-file-system-supplemented-by-xp-endo-finisher-file
#7
Anda Kfir, Rotem Moza-Levi, Moran Herteanu, Amir Weissman, Ronald Wigler
OBJECTIVES: The purpose of this study was to assess the amount of apically extruded debris during the preparation of oval canals with either a rotary file system supplemented by the XP-endo Finisher file or a full-sequence self-adjusting file (SAF) system. MATERIALS AND METHODS: Sixty mandibular incisors were randomly assigned to two groups: group A: stage 1-glide path preparation with Pre-SAF instruments. Stage 2-cleaning and shaping with SAF. Group B: stage 1-glide path preparation with ProGlider file...
June 12, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28571265/comparative-analyses-of-smear-layer-removal-using-four-different-irrigant-solutions-in-the-primary-root-canals-a-scanning-electron-microscopic-study
#8
Krishna Vallabhaneni, Pranitha Kakarla, Sai Sankar Jogendra Avula, N Venu Gopal Reddy, Mjs Pratap Gowd, Kuravadi Raja Vardhan
INTRODUCTION: A clinician's path to success is a clean root canal system with three dimensional seal. Mechanical instrumentation of root canals alone leaves behind a smear layer covering the dentinal walls. Instrumentation must always be supported by use of irrigants which are considered as an essential prerequisite for root canal debridement. AIM: The aim of this in vitro study was to compare the efficacy of four irrigating solutions in removing the smear layer in primary root canals after hand instrumentation...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28437194/comparison-of-three-final-irrigation-activation-techniques-effects-on-canal-cleanness-smear-layer-removal-and-dentinal-tubule-penetration-of-two-root-canal-sealers
#9
Elmas Turkel, Emel Olga Onay, Mete Ungor
OBJECTIVE: The aim of this study was to compare three final irrigation activation techniques with respect to their effects on debridement efficacy, smear layer removal, and dentinal tubule penetration of two different root canal sealers. BACKGROUND DATA: Different applications to improve the delivery of irrigating solutions within the root canal system are currently being investigated, as not all of the mechanisms and effects of these techniques have been clearly identified...
February 22, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28349913/establishing-apical-patency-to-be-or-not-to-be
#10
Zahed Mohammadi, Hamid Jafarzadeh, Sousan Shalavi, Jun-Ichiro Kinoshita
INTRODUCTION: The apical portion of the root canal is very complex and challenging during endodontic treatment. Root canal preparation and obturation to the apical constriction may provide the best prognosis. Incomplete debridement, foramen transportation, and inadequate seal in the apical portion are considered to be responsible for treatment failure. The technique "apical patency" is considered as a way for maintaining the apical part the free of the debris by recapitulation, using a small K-file through the area of the apical foramen...
April 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28302729/phagocytosis-dependent-ketogenesis-in-retinal-pigment-epithelium
#11
Juan Reyes-Reveles, Anuradha Dhingra, Desiree Alexander, Alvina Bragin, Nancy J Philp, Kathleen Boesze-Battaglia
Daily, the retinal pigment epithelium (RPE) ingests a bolus of lipid and protein in the form of phagocytized photoreceptor outer segments (OS). The RPE, like the liver, expresses enzymes required for fatty acid oxidation and ketogenesis. This suggests that these pathways play a role in the disposal of lipids from ingested OS, as well as providing a mechanism for recycling metabolic intermediates back to the outer retina. In this study, we examined whether OS phagocytosis was linked to ketogenesis. We found increased levels of β-hydroxybutyrate (β-HB) in the apical medium following ingestion of OS by human fetal RPE and ARPE19 cells cultured on Transwell inserts...
May 12, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28258810/apically-extruded-debris-after-retreatment-procedure-with-reciproc-protaper-next-and-twisted-file-adaptive-instruments
#12
Koray Yılmaz, Taha Özyürek
INTRODUCTION: The aim of this study was to compare the amount of debris extruded from the apex during retreatment procedures with ProTaper Next (PTN; Dentsply Maillefer, Ballaigues, Switzerland), Reciproc (RCP; VDW, Munich, Germany), and Twisted File Adaptive (TFA; SybronEndo, Orange, CA) files and the duration of these retreatment procedures. METHODS: Ninety upper central incisor teeth were prepared and filled with gutta-percha and AH Plus sealer (Dentsply DeTrey, Konstanz, Germany) using the vertical compaction technique...
April 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28256488/effects-of-seven-different-irrigation-techniques-on-debris-and-the-smear-layer-a-scanning-electron-microscopy-study
#13
M Yilmaz, S Yılmaz, A Dumanı, C Kuden, O Yoldas
AIM: Conventional manual irrigation with a syringe and needle remains widely accepted technique in the irrigation procedures. However, its flushing action has some limitations. Currently, several techniques and systems are available and reported to improve the insufficiency of syringe irrigation. The aim of this study was to evaluate the effectiveness of 7 different irrigation techniques compared to standard irrigation. MATERIALS AND METHODS: Straight roots from 80 extracted human maxillary central incisors were collected, and root canals were instrumented with K-files up to apical size 50...
March 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28243300/comparison-of-apical-extrusion-of-debris-by-using-single-file-full-sequence-rotary-and-reciprocating-systems
#14
Maryam Ehsani, Robab Farhang, Azadeh Harandi, Saeid Tavanafar, Maryam Raoof, Saeedeh Galledar
OBJECTIVES: During root canal preparation, apical extrusion of debris can cause inflammation, flare-ups, and delayed healing. Therefore, instrumentation techniques that cause the least extrusion of debris are desirable. This study aimed to compare apical extrusion of debris by five single-file, full-sequence rotary and reciprocating systems. MATERIALS AND METHODS: One hundred twenty human mandibular premolars with similar root lengths, apical diameters, and canal curvatures were selected and randomly assigned to six groups (n=20): Reciproc R25 (25, 0...
November 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28240758/the-influence-of-a-new-clinical-motion-for-endodontic-instruments-on-the-incidence-of-postoperative-pain
#15
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/28210445/evaluation-of-conventional-protaper-hand-and-protaper-rotary-instrumentation-system-for-apical-extrusion-of-debris-irrigants-and-bacteria-an-in-vitro-randomized-trial
#16
Pinky Kalra, Arathi Rao, Ethel Suman, Ramya Shenoy, Baranya-Shrikrishna Suprabha
BACKGROUND: Endodontic instrumentation carries the risk of over extrusion of debris and bacteria. The technique used and the type of instrumentation influences this risk. AIM: The purpose of this study was to evaluate and compare the K-file, ProTaper hand and ProTaper rotary instrumentation systems for the amount of apically extruded debris, irrigant solution and intracanal bacteria. DESIGN: Experimental single blinded randomized type of in vitro study with sample of 30 single rooted teeth...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28196289/what-happens-to-unprepared-root-canal-walls-a-correlative-analysis-using-micro-computed-tomography-and-histology-scanning-electron-microscopy
#17
J F Siqueira, A R Pérez, M F Marceliano-Alves, J C Provenzano, S G Silva, F R Pires, G C S Vieira, I N Rôças, F R F Alves
AIM: To microscopically examine the cleanliness of root canal walls that remained unprepared as revealed by micro-CT. METHODOLOGY: The root canals of 10 freshly extracted mandibular premolars with necrotic pulps and apical periodontitis along with the mesiobuccal canals of 11 mandibular molars with vital pulps were prepared using Reciproc instruments R40 and R25, respectively, and 2.5% sodium hypochlorite irrigation. Specimens were scanned in micro-CT before and after preparation, and the unprepared areas were identified...
February 14, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28185091/canal-cleanliness-using-different-irrigation-activation-systems-a-sem-evaluation
#18
K Urban, D Donnermeyer, Edgar Schäfer, S Bürklein
OBJECTIVES: The purpose of this study was to assess the efficacy of different final irrigation activation methods in removing debris and smear layer in the apical, middle, and coronal portion of straight root canals. MATERIAL AND METHODS: Straight root canals of 58 freshly extracted mandibular premolars were used. Root canals were prepared to size 40.06. Irrigation was performed using 3% sodium hypochlorite. Samples were divided into four equal groups (n = 12) according to the irrigation activation techniques: (A) manual irrigation (MI), (B) EndoActivator (EA) (Dentsply Maillefer, Ballaigues, Switzerland), (C) sonic activation EDDY (EDDY; VDW, Munich, Germany), and (D) passive ultrasonic irrigation (PUI)...
February 9, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28182065/comparative-evaluation-of-canal-cleaning-ability-of-various-rotary-endodontic-filesin-apical-third-a-scanning-electron-microscopic-study
#19
Ganesh Ranganath Jadhav, Priya Mittal, Anish Kulkarni, Shibli Syed, Ravikiran Bagul, Saina Elahi, Dheeraj Kalra
BACKGROUND: The purpose of this study was to evaluate the canal cleaning ability of three novel endodontic rotary instruments and compare with ProTaper files as a control in apical third of root canals under scanning electron microscopy (SEM). MATERIALS AND METHODS: Eighty freshly extracted mandibular premolars were selected according to inclusion criteria. Buccal cusp tips were ground to ensure having a flat coronal reference point with a total tooth length of 16 mm for all samples...
November 2016: Dental Research Journal
https://www.readbyqxmd.com/read/28179921/in-vitro-comparison-of-apical-debris-extrusion-using-rotary-and-reciprocating-systems-in-severely-curved-root-canals
#20
Abbas Delvarani, Nahid Mohammadzadeh Akhlaghi, Raana Aminirad, Sohrab Tour Savadkouhi, Seyed Aliakbar Vahdati
INTRODUCTION: The aim of this in vitro study was to compare the amount of apically extruded debris after root canal preparation using rotary and reciprocating systems in severely curved root canals. METHODS AND MATERIALS: Thirty six extracted human mandibular first molars with 25-35(°) curvature in their mesiobuccal (MB) canal (according to Schneider's method) were cleaned and shaped with ProTaper and WaveOne systems. The extruded debris was collected and their net weight was calculated...
2017: Iranian Endodontic Journal
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