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Apical leakage

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https://www.readbyqxmd.com/read/29026696/the-effect-of-chlorhexidine-mixed-with-mineral-trioxide-aggregate-on-bacterial-leakage-of-apical-plug-in-simulated-immature-teeth-using-human-fresh-saliva
#1
Gholamhossein Ramezani, Sohrab Tour Savadkouhi, Sahar Sayahpour
OBJECTIVES: Apexification is a challenging treatment in necrotic open apices teeth and bacterial leakage is the main reason for the treatment failure. The aim of this study is to compare the effect of mixing mineral trioxide aggregate (MTA) with chlorhexidine (CHX) on microbial leakage in apexification treatment of simulated immature teeth. MATERIALS AND METHODS: In this experimental study, 44 intact central incisors were selected based on inclusion criteria. The coronal and 2 mm of apical part of the specimens were removed till all root segments were 12 mm long...
September 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28993506/kidney-proximal-tubule-lipoapoptosis-is-regulated-by-fatty-acid-transporter-2-fatp2
#2
Shenaz Khan, Pablo D Cabral, William P Schilling, Zachary W Schmidt, Asif N Uddin, Amelia Gingras, Sethu M Madhavan, Jeffrey L Garvin, Jeffrey R Schelling
Albuminuria and tubular atrophy are among the highest risks for CKD progression to ESRD. A parsimonious mechanism involves leakage of albumin-bound nonesterified fatty acids (NEFAs) across the damaged glomerular filtration barrier and subsequent reabsorption by the downstream proximal tubule, causing lipoapoptosis. We sought to identify the apical proximal tubule transporter that mediates NEFA uptake and cytotoxicity. We observed transporter-mediated uptake of fluorescently labeled NEFA in cultured proximal tubule cells and microperfused rat proximal tubules, with greater uptake from the apical surface than from the basolateral surface...
October 9, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28989122/comparison-of-microleakage-of-class-v-cavities-restored-with-the-embrace-wetbond-class-v-composite-resin-and-conventional-opallis-composite-resin
#3
Maryam Tavangar, Zahra Zohri, Hosein Sheikhnezhad, Shahrzad Shahbeig
PURPOSE: This study was undertaken to compare the micro-leakage of class V cavities restored with the newly introduced Embrace WetBond class V (EWC) composite resin and conventional Opallis composite resin. MATERIALS AND METHODS: In this in vitro study, class V cavities were prepared on 30 extracted bovine incisors, with the gingival floor and the coronal margin of the cavities 1 mm apical and coronal to the cementoenamel junction (CEJ) respectively. The cavities measured 3 mm in length, 2 mm in width, and 1...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28855753/comparative-evaluation-of-apical-microleakage-in-immediate-and-delayed-postspace-preparation-using-four-different-root-canal-sealers-an-in-vitro-study
#4
Prabeesh Padmanabhan, Joydeep Das, R Veena Kumari, P R Pradeep, Ankur Kumar, Sneha Agarwal
BACKGROUND: Endodontically treated teeth often lack sufficient support for a permanent restoration. During post space preparation, it is important not to disturb the integrity of the apical seal. AIM: This study compared the effect of immediate versus delayed post space preparation on the apical seal using four different sealers. MATERIALS AND METHODS: One hundred and thirty single rooted teeth were biomechanically prepared and obturated with single cone gutta-percha and 4 sealers: Endoflas FS, AH Plus, Gutta flow and MTA...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28828158/comparative-evaluation-of-the-apical-sealing-ability-of-a-ceramic-based-sealer-and-mta-as-root-end-filling-materials-an-in-vitro-study
#5
Bhavana Gandhi, Ramesh Halebathi-Gowdra
BACKGROUND: The present study was aimed to evaluate and compare the apical sealing ability of two endodontic root-end filling materials namely, iRoot SP (ceramic based) and ProRoot MTA using the bacterial leakage system. MATERIAL AND METHODS: A total of fifty recently extracted, single rooted teeth with a single straight canal were selected for the study. The teeth were chemo mechanically prepared. The apical 3mm of the root was resected and root end cavities were prepared...
July 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28728241/-petrous-bone-cholesteatoma-surgery-approach-and-outcomes
#6
R Y Wang, W J Han, T Zhang, W D Shen, J Liu, P Dai, S M Yang, D Y Han
Objective: To investigate the choice of surgical approach of petrous bone cholesteatoma (PBC)and surgical outcomes. Methods: A retrospective study was performed on 90 patients diagnosed and treated for PBC from January 2000 to December 2014 by the Chinese People's Liberation Army General Hospital otolaryngologists. According to Sanna's classification, 40 out of the 90 cases were supralabyrinthine, five infralabyrinthine, four infralabyrinthine-apical, 25 massive and 16 apical. Five cases underwent transmastoid and retrolabyrinthine approach, translabyrinthine approach was performed on six patients, 19 cases underwent subtotal petrosectomy, seven cases underwent transotic approach, 41 cases underwent middle fossa approach, combined transmastoid/middle fossa approach was performed on 11 cases, translabyrinthine and sphenoid sinus approach were performed on one case...
July 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28682281/microleakage-of-class-ii-composite-resin-restorations-with-self-adhesive-composite-resin-liners
#7
Maryam Doozandeh, Fereshteh Shafiei, Fatemeh Mohammadi
This study investigated the microleakage of Class II composite restorations with composite resin liners. Standardized box cavities were prepared on the mesial and distal surfaces of 84 extracted intact human molars. Proximal margins were located in enamel (occlusal) and 1.0 mm apical to the cementoenamel junction (gingival). The teeth were randomly divided into 6 groups (n = 28 cavities) and restored with Filtek Z350 nanohybrid composite resin (FZ). The test groups were lined with a conventional flowable composite resin, Premise Flowable (PF), or 1 of 2 self-adhesive composites (SACs): Vertise Flow (VF) or Clearfil SA luting cement (CSA) with or without their respective self-etching adhesives: Optibond All-in-One (OB) or Clearfil SE Bond (CSE)...
July 2017: General Dentistry
https://www.readbyqxmd.com/read/28638561/importance-and-methodologies-of-endodontic-microleakage-studies-a-systematic-review
#8
REVIEW
Farnaz Jafari, Sanaz Jafari
INTRODUCTION: It is very important to obtain a tight seal in obturated root canal, making it necessary to conduct clinical or laboratory studies on the sealability of endodontic materials. Different methodologies have been historically used to assess microleakage of different endodontic materials. The aim of the present study was to comprehensively review different material testing methods used in microleakage studies, their interpretation and importance in endodontic literature. MATERIAL AND METHODS: A systematic search was conducted in Medline, Cochrane, and Web of Science databases...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28638547/push-out-bond-strength-of-different-endodontic-obturation-material-at-three-different-sites-in-vitro-study
#9
Pankaj Mishra, Anjna Sharma, Sunil Mishra, Manas Gupta
BACKGROUND: The key to success of any root canal therapy is adequate obturation of the prepared root canal space. Root canal sealers are not dimensionally stable and might dissolve partially over a period of time. The objective of this in vitro study is to evaluate the push-out bond strength to intraradicular dentin of two endodontic obturation materials. MATERIAL AND METHODS: Forty extracted single rooted permanent teeth were used. Canals orifice was explored, teeth were instrumented...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28631551/apical-microleakage-in-root-canals-obturated-with-2-different-endodontic-sealer-systems-in-canine-teeth-of-dogs
#10
Chad W Lothamer, Ashley Anderson, Scott J Hetzel, Alex I Adrian, Christopher Snyder, Stephanie Goldschmidt, Jason W Soukup
An apical dye leakage test was utilized to compare 2 endodontic sealer systems commonly used in veterinary endodontic treatment. Rotary instrumentation followed by injection of 2 different sealers (GuttaFlow 2 and AH Plus) and a single master cone obturation technique were compared. Following obturation and restoration, specimens were immersed in India ink for 48 hours. A tooth mineral clearing technique was utilized to render the tooth samples transparent. Subsequently, the apices were evaluated for prevalence and magnitude of apical dye penetration under magnification...
June 2017: Journal of Veterinary Dentistry
https://www.readbyqxmd.com/read/28576466/are-additive-effects-of-dietary-surfactants-on-intestinal-tight-junction-integrity-an-overlooked-human-health-risk-a-mixture-study-on-caco-2-monolayers
#11
Anders Glynn, Annachiara Malin Igra, Salomon Sand, Nils Gunnar Ilbäck, Karl Erik Hellenäs, Johan Rosén, Bitte Aspenström-Fagerlund
Surfactants may cause dysfunction of intestinal tight junctions (TJs), which is a common feature of intestinal autoimmune diseases. Effects of dietary surfactants on TJ integrity, measured as trans-epithelial resistance (TEER), were studied in Caco-2 cell monolayers. Cytotoxicity was assessed as apical LDH leakage. Monolayers were apically exposed for 60 min to the dietary surfactants solanine and chaconine (SC, potato glycoalkaloids, 0-0.25 mM), perfluorooctane sulfonic acid (PFOS, industrial contaminant, 0-0...
August 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28490377/cochlear-implant-electrode-sealing-techniques-and-related-intracochlear-pressure-changes
#12
Ingo Todt, Julica Utca, Dania Karimi, Arne Ernst, Philipp Mittmann
BACKGROUND: The inserted cochlear implanted electrode is covered at the site of the round window or cochleostomy to prevent infections and leakage. In a surgically hearing preservational concept, low intracochlear pressure changes are of high importance. The aim of this study was to observe intracochlear pressure changes due to different sealing techniques in a cochlear model. METHODS: Cochlear implant electrode insertions were performed in an artifical cochlear model and the intracochlear pressure changes were recorded in parallel with a micro-pressure sensor positioned in the apical region of the cochlea model to follow the maximum amplitude of intracochlear pressure...
May 11, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28427121/-efficacy-and-safety-of-vertebrae-pedicle-subtraction-osteotomy-by-posterior-trans-apical-for-correction-of-severe-and-rigid-idiopathic-scoiiosis
#13
T Xu, Maimaiti Maierdan, H L Guo, Maimaiti Pulati, J Sheng, Q Deng, W B Sheng
Objective: To evaluate the efficacy and safety of pedicle subtraction osteotomy for correction of severe rigid idiopathic scoliosis. Methods: From January 2003 to December 2014, eighteen patients with severe rigid idiopathic scoliosis were treated by posterior wedge osteotomy in department of spinal surgery, the First Affiliated Hospital of Xinjiang Medical University. There were 5 males and 13 females, and the average age at was (16.9±9.1)years, and the average follow-up was 47.6 months. The coronal and sagittal Cobb's angles, sagittal trunk shifts, apical vertebral translation, height change and fusion segments were measured on standing AP and lateral radiographs before, after surgery and the final follow-up...
April 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28397460/is-there-a-genotoxic-potential-of-endodontic-root-materials
#14
Andreas Taubmann, Brita Willershausen, Christina Erbe, Bernd Kaina, Ines Willershausen
BACKGROUND: Leakage of components from endodontic materials (EM) can occur in case of apical extrusion into the periapical tissue. Therefore, an important prerequisite, besides the mechanical properties of the EM, is a high biocompatibility. In the present study, we elucidated the genotoxic potential of EMs of different base composition by utilizing the -H2AX assay. METHODS: For investigation of the genotoxic potential of EM, supernatants of commercially available EM were prepared and dilutions were applied to human gingival fibroblasts...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28387992/influence-of-post-space-preparation-on-the-apical-leakage-of-calamus-single-cone-and-cold-lateral-condensation-obturation-techniques-a-computerized-fluid-filtration-study
#15
Zeynep Özkurt-Kayahan, Güher Barut, Zuhal Ulusoy, Hasan Oruçoğlu, Mehmet Baybora Kayahan, Ender Kazazoğlu, Faruk Haznedaroğlu
PURPOSE: Apical microleakage between the root canal and periapical tissues is considered a common cause of endodontic failure. The aim of this study was to evaluate the apical microleakage of various obturation techniques after immediate post space preparations with different drills. MATERIALS AND METHODS: One hundred twenty human single-rooted teeth were selected for this study. The coronal portions were removed to achieve a uniform length of 15 mm. All root canals were instrumented with ProTaper Next rotary files using crown-down technique...
April 7, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28384974/a-comparative-study-of-the-quality-of-apical-seal-in-resilon-epiphany-se-following-intra-canal-irrigation-with-17-edta-10-citric-acid-and-mtad-as-final-irrigants-a-dye-leakage-study-under-vacuum
#16
Saravana Karthikeyan Balasubramanian, Vidya Saraswathi, Nidambur Vasudev Ballal, Shashi Rashmi Acharya, J Sivakumar Sampath, Sandeep Singh
INTRODUCTION: Adequate apical sealing ability of the root canal filling material is an essential requisite for a successful endodontic therapy. Various endodontic irrigants are used for the removal of smear layer before obturating with a solid core material, thereby, reducing microleakage and improving apical seal. Resilon, a synthetic material was developed as an alternative to replace the conventional gutta-percha (standard root canal filling material) and traditional sealers for the obturation of endodontically treated teeth...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28349913/establishing-apical-patency-to-be-or-not-to-be
#17
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/28298973/effect-of-different-mixing-and-placement-methods-on-the-quality-of-mta-apical-plug-in-simulated-apexification-model
#18
Negin Ghasemi, Maryam Janani, Tahmineh Razi, Faezeh Atharmoghaddam
BACKGROUND: It is necessary apical plug material to exhibit proper adaptation with the root canal walls. Presence of voids at the interface between the root canal wall and this material result in micro leakage, which might have a relationship with post treatment disease. The aim of the present study was to evaluate the effect of different mixing (manual and ultrasonic) and placement (manual and manual in association with indirect ultrasonic) method of Mineral Trioxide Aggregate (MTA) on the void count and dimension in the apical plug in natural teeth with simulated open apices...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28274050/effect-of-calcium-hydroxide-based-intracanal-medicaments-on-the-apical-sealing-ability-of-resin-based-sealer-and-guttapercha-obturated-root-canals
#19
Rithima R Sokhi, M V Sumanthini, Vanitha U Shenoy, Mohit A Bodhwani
INTRODUCTION: Calcium Hydroxide (CH) is one of the most commonly used intracanal medicaments which can be used with various vehicles. AIM: The aim of this in vitro study was to evaluate the effect of three CH based intracanal medicaments on the apical sealing ability of AH Plus - guttapercha obturation. MATERIALS AND METHODS: Crowns of 100 extracted single rooted human teeth were sectioned at the Cemento-Enamel Junction (CEJ) to a standardized length...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28194361/post-space-preparation-timing-of-root-canals-sealed-with-ah-plus-sealer
#20
Hae-Ri Kim, Young Kyung Kim, Tae-Yub Kwon
OBJECTIVES: To determine the optimal timing for post space preparation of root canals sealed with epoxy resin-based AH Plus sealer in terms of its polymerization and influence on apical leakage. MATERIALS AND METHODS: The epoxy polymerization of AH Plus (Dentsply DeTrey) as a function of time after mixing (8, 24, and 72 hours, and 1 week) was evaluated using Fourier transform infrared (FTIR) spectroscopy and microhardness measurements. The change in the glass transition temperature (Tg ) of the material with time was also investigated using differential scanning calorimetry (DSC)...
February 2017: Restorative Dentistry & Endodontics
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