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https://www.readbyqxmd.com/read/29143136/investigation-of-arginine-a-specific-cysteine-proteinase-gene-expression-profiling-in-clinical-porphyromonas-gingivalis-isolates-against-photokilling-action-of-the-photo-activated-disinfection
#1
Maryam Pourhajibagher, Roghayeh Ghorbanzadeh, Abbas Bahador
Porphyromonas gingivalis is a significant root canal pathogen capable of causing endodontic infections, which during their treatment may receive sub-lethal doses of photo-activated disinfection (sPAD). As sPAD can influence microbial virulence, this study was designed to evaluate the effect of sPAD on gene expression level of arginine A-specific cysteine proteinase (rgpA), as one of the underlying virulence factors involved in the development of endodontic infection via P. gingivalis strains. To find out the sPAD against 16 clinical isolates of PAD-resistant P...
November 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29142881/smear-layer-removal-by-different-chemical-solutions-used-with-or-without-ultrasonic-activation-after-post-preparation
#2
Daniel Poletto, Ana Claudia Poletto, Andressa Cavalaro, Ricardo Machado, Leopoldo Cosme-Silva, Cássia Cilene Dezan Garbelini, Márcio Grama Hoeppner
Objectives: This study evaluated smear layer removal by different chemical solutions used with or without ultrasonic activation after post preparation. Materials and Methods: Forty-five extracted uniradicular human mandibular premolars with single canals were treated endodontically. The cervical and middle thirds of the fillings were then removed, and the specimens were divided into 9 groups: G1, saline solution (NaCl); G2, 2.5% sodium hypochlorite (NaOCl); G3, 2% chlorhexidine (CHX); G4, 11...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29135290/-study-of-the-canalis-mandibulae-morphology-in-different-vertical-facial-types
#3
Krisztina Mártha I, Cristina Bica, Blanka Kész, Bernadette Kerekes Máthé
INTRODUCTION: The precise knowledge of the position of canalis mandibulae and foramen mandibulae is important for surgical and endodontic interventions on the mandible. AIM: The aim of the study is to examine the position of these anatomical landmarks in different vertical facial types. METHOD: In the panorama radiograph of 26 normodivergent, 26 hypodivergent and 28 hyperdivergent arthritis (total of 1360 measurements) we measured the distance between the canalis mandibulae and interdental septums, the apex of the lateral teeth, the mandibular base, the goniac angle, and the steepness of the canal and the distance the foramen mandibulae to the anterior and posterior margin of the ramus...
November 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29126633/mechanical-behavior-of-endodontically-restored-canine-teeth-effects-of-ferrule-post-material-and-shape
#4
Pietro Ausiello, Stefano Ciaramella, Massimo Martorelli, Antonio Lanzotti, Fernando Zarone, David C Watts, Antonio Gloria
OBJECTIVE: To assess the effect of a ferrule design with specific post material-shape combinations on the mechanical behavior of post-restored canine teeth. METHODS: Micro-CT scan images of an intact canine were used to create a 3-D tessellated CAD model, from which the shapes of dentin, pulp and enamel were obtained and geometric models of post-endodontically restored teeth were created. Two types of 15mm post were evaluated: a quartz fiber post with conical-tapered shape, and a carbon (C) fiber post with conical-cylindrical shape...
November 7, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29126360/endodontic-treatment-of-canine-teeth-in-a-cynomolgus-monkey-macaca-fascicularis
#5
Caterina Facchini, Ilaria Iacopetti, Eugenio Gaudio, Alessandro Zotti, Massimo Boldrin, Fabio Fante, Franco Mutinelli, Emanuele Cozzi, Giulia Maria De Benedictis
A case of bilateral superior canine tooth pulp necrosis in an 18-year-old male Macaca fascicularis is described . A skull computed tomography scan was performed to confirm the diagnostic suspicion. A successful bilateral endodontic treatment with coronotomy was performed using rotary nickel-titanium instruments. Post-operative dental radiographs confirmed the correct positioning of the sealant. A rapid and excellent clinical recovery was obtained after each surgery. This innovative approach may contribute to improving the quality of root canal treatments provided to non-human primates...
January 1, 2017: Laboratory Animals
https://www.readbyqxmd.com/read/29123632/management-of-post-endodontic-retreatment-pain-with-low-level-laser-therapy
#6
Mohammad Asnaashari, Hengameh Ashraf, Amir Houshang Daghayeghi, Seyed Masoud Mojahedi, Saranaz Azari-Marhabi
Introduction: Pharmacotherapy with analgesics and non-steroidal anti-inflammatory drugs has been traditionally used to relief post-operative pain of endodontic treatments. However, due to the side effects reported for these drugs, some efforts have been made to decrease the post-operative pain of the endodontic treatments through laser irradiation. The present study aimed to evaluate the effects of low level laser therapy (LLLT) on the reduction of pain after root canal retreatment. Methods: In this clinical trial, 61 patients requiring endodontic retreatments in posterior teeth were selected...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29114431/maxillary-first-premolars-with-three-root-canals-two-case-reports
#7
Zeliha Ugur, Kerem Engin Akpinar, Demet Altunbas
It is very important that the dentists have sufficient information about possible variations in the expected root canal configurations in order to achieve success in endodontic treatment. In addition to having adequate knowledge on the variations of the root canal anatomy, periapical radiographs from different angles, careful examination of the pulp chamber floor, and use of dental operation microscope during the procedure are also important factors that contribute to the diagnosis of the additional roots and canals...
2017: J Istanb Univ Fac Dent
https://www.readbyqxmd.com/read/29109814/evaluation-of-dentin-defect-formation-during-retreatment-with-hand-and-rotary-instruments-a-micro-ct-study
#8
Ayca Yilmaz, Dilek Helvacioglu-Yigit, Cansu Gur, Handan Ersev, Gullu Kiziltas Sendur, Egemen Avcu, Canan Baydemir, Paul Vincent Abbott
The purpose of this study was to compare the incidence and longitudinal propagation of dentin defects after gutta-percha removal with hand and rotary instruments using microcomputed tomography. Twenty mandibular incisors were prepared using the balanced-force technique and scanned in a 19.9 μm resolution. Following filling with the lateral compaction technique, gutta-percha was removed with ProTaper Universal Retreatment (PTUR) or hand instruments. After rescanning, a total of 24,120 cross-sectional images were analyzed...
2017: Scanning
https://www.readbyqxmd.com/read/29109318/extrusion-of-debris-from-primary-molar-root-canals-following-instrumentation-with-traditional-and-new-file-systems
#9
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/29107135/influence-of-the-addition-of-microsphere-load-amoxicillin-in-the-physical-chemical-and-biological-properties-of-an-experimental-endodontic-sealer
#10
Nélio Bairros Dornelles, Fabrício Mezzomo Collares, Bruna Genari, Gabriela de Souza Balbinot, Susana Maria Werner Samuel, Rodrigo Alex Arthur, Fernanda Visioli, Silvia Stanisçuaski Guterres, Vicente Castelo Branco Leitune
AIM: To develop an endodontic sealer with amoxicillin-loaded microsphere and to evaluate its properties. METHODS: Experimental sealer was obtained by mixing 70wt% UDMA, 15wt% GDMA and 15wt% BISEMA. In addition, CQ, DHEPT and PB were incorporated at 1 mol% and 0.01wt% BHT and 10wt% YbF3. Microspheres were produced by drying in spray dryer. Two experimental groups (10 and 15wt% of microspheres) and one control group (without microspheres) were formulated. The sealers were evaluated for the degree of conversion (n=3), degradation in solvent (n=3), drug release profile (n=3), antimicrobial activity (n=3), flow (n=3), film thickness (n=3) and cytotoxicity (n=3)...
October 26, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29104601/treatment-of-a-four-rooted-maxillary-second-molar-detected-with-cone-beam-computed-tomography
#11
Nahid Mohammadzade Akhlaghi, Mahta Fazlyab
The significance of clinician's knowledge about root canal anatomy and its possible variations cannot be overlooked. In some cases, taking advantage of complementary imaging techniques can help achieve a perfect flawless endodontic treatment. This article reports endodontic management of a second maxillary molar that had an uncommon anatomy of the chamber floor. After obtaining a cone-beam computed tomography (CBCT) image, the presence of a second palatal root was confirmed. All four roots were treated and patient's symptoms were resolved...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29102078/root-canal-filling-quality-of-a-premixed-calcium-silicate-endodontic-sealer-applied-using-gutta-percha-cone-mediated-ultrasonic-activation
#12
Jung-Ae Kim, Yun-Chan Hwang, Vinicius Rosa, Mi-Kyung Yu, Kwang-Won Lee, Kyung-San Min
INTRODUCTION: The aim of this study was to investigate the filling quality of a recently developed premixed calcium silicate-based endodontic sealer (Endoseal MTA) with a single gutta-percha (GP) cone technique compared with a resin-based sealer (AH plus) with warm vertical compaction. We also explored the effect of GP cone-mediated ultrasonic activation on the filling quality of Endoseal MTA. METHODS: Thirty human single-rooted maxillary premolars with ribbon-shaped canals were prepared and assigned to 3 experimental groups according to filling method: EMS group was Endoseal MTA + single-cone; EMSU group was Endoseal MTA + single-cone with ultrasonic activation; and the APW group was AH plus + warm vertical compaction...
October 25, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29097290/in-vitro-evaluation-of-methylene-blue-removal-from-root-canal-after-photodynamic-therapy
#13
Karen Müller Ramalho, Sandra Ribeiro Cunha, Eric Mayer-Santos, Carlos de Paula Eduardo, Patricia Moreira de Freitas, Ana Cecilia Correa Aranha, Cacio Moura-Netto
In Endodontics, photosensitizers' such as methylene blue and toluidine blue have been used in photodynamic therapy due to their positive results. However, they can stain the dentin from the root canal after Photodynamic Therapy (PDT). The present in vitro study aimed to evaluate different stain removal protocols from root canal after PDT using methylene blue (MB) dye. After mechanical preparation of the root canal of 40 uni-radicular human teeth, PDT was performed using 0,01% MB with parameters of 3minutes of pre-irradiation and a diode laser irradiation emitting at 660nm, 40mW, 4minutes, 9...
October 30, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29090391/prevention-of-coronal-discoloration-induced-by-regenerative-endodontic-treatment-in-an-ex-vivo-model
#14
Noushin Shokouhinejad, Mehrfam Khoshkhounejad, Marzieh Alikhasi, Parisa Bagheri, Josette Camilleri
OBJECTIVES: The aim of this study was to assess the effect of sealing the pulp chamber walls with a dentin-bonding agent (DBA) on prevention of discoloration induced by regenerative endodontic procedures (REPs) in an ex vivo model. MATERIALS AND METHODS: Ninety-six bovine incisors were prepared and randomly divided into two groups. In one group, the pulp chamber walls were sealed with DBA before placement of triple antibiotic paste (TAP) containing minocycline inside the root canals, but in the other group, DBA was not applied...
October 31, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29082806/quality-aspects-of-ex-vivo-root-canal-treatments-done-by-undergraduate-dental-students-using-four-different-endodontic-treatment-systems
#15
Luise Jungnickel, Casper Kruse, Michael Vaeth, Lise-Lotte Kirkevang
OBJECTIVE: To evaluate factors associated with treatment quality of ex vivo root canal treatments performed by undergraduate dental students using different endodontic treatment systems. MATERIAL AND METHODS: Four students performed root canal treatment on 80 extracted human teeth using four endodontic treatment systems in designated treatment order following a Latin square design. Lateral seal and length of root canal fillings was radiographically assessed; for lateral seal, a graded visual scale was used...
October 29, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29079055/bleaching-of-a-discolored-tooth-with-retrieval-of%C3%A2-remnants-after-successful-regenerative-endodontics
#16
Aovana Timmerman, Peter Parashos
INTRODUCTION: This report presents the retrieval of remnants from a discolored mandibular right second premolar (tooth #29) of a 17-year-old female after a successful regenerative endodontic procedure (REP). METHODS: The REP was performed in October 2011. Coronal discoloration became of great concern to the patient at a review visit in 2016. A cone-beam computed tomographic scan was taken to investigate the formation of hard tissues within the root canal as well as a region of no calcified tissue formation...
October 24, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29079053/dehydration-induces-cracking-in-root-dentin-irrespective-of-instrumentation-a-two-dimensional-and-three-dimensional-study
#17
Hagay Shemesh, Tom Lindtner, Carlos Aznar Portoles, Paul Zaslansky
INTRODUCTION: Water loss strongly affects the mechanical behavior of dentin. Micro-computed tomography (μCT) studies exploring the influence of endodontic procedures on root cracking often lack information on the hydration state of the scanned samples. This study explores the relationship between dehydration and crack formation in root dentin with and without endodontic instrumentation. METHODS: Fifty-three extracted teeth were used. Thirty canals were not instrumented, and 23 canals were instrumented with ProTaper files until F3...
October 24, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29079050/complicated-root-canal-morphology-of-mandibular-lateral-incisors-is-associated-with-the-presence-of-distolingual-root-in-mandibular-first-molars-a-cone-beam-computed-tomographic-study-in-a-taiwanese-population
#18
Yu-Chiao Wu, Wan-Chien Cheng, Ming-Pang Chung, Chi-Chun Su, Pei-Wei Weng, Yi-Wen Cathy Tsai, Ho-Sheng Chiang, Hsiao-Wen Yeh, Chi-Hsiang Chung, Yi-Shing Shieh, Ren-Yeong Huang
INTRODUCTION: The aim of this study was to assess the root canal configurations in permanent mandibular lateral incisors (PMLIs) and the correlation between the root canal configurations of PMLIs with the appearance of a distolingual root (DLR) in permanent mandibular first molars (PMFMs) using cone-beam computed tomographic (CBCT) imaging. METHODS: A total of 1200 CBCT images (300 patients) of PMFMs and PMLIs were investigated. The frequency and distribution of DLRs in PMFMs along with root canal configurations of PMLIs were assessed ipsilaterally and contralaterally...
October 24, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29076680/practice-of-endodontic-re-treatment-in-four-cities-of-pakistan
#19
Sana Ehsen Nagi, Farhan Raza Khan, Munawar Rahman
BACKGROUND: Root canal re-treatment is the procedure of choice when the primary root treatment fails but patient is inclined toward salvage of the tooth. The re-treatment is often a challenging procedure owing to lack to the predictability in the outcomes. Since, there is a no single way of planning and executing such procedure, a study was planned to assess the knowledge, attitude and practice regarding endodontic re-treatment among Pakistani dentists. The effect of clinical experience on the re-treatment planning was also determined...
July 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/29075424/the-use-of-spiral-ct-in-the-detection-and-management-of-a-permanent-maxillary-first-molar-with-single-root-and-single-canal-a-rare-occurrence
#20
Neil De Souza, Krishna Shetty, Rohit P Kolipaka, Paul Chalakkal
A sound knowledge of the normal tooth morphology and its numerous variations is essential to the success of endodontic therapy. While extra canals and lateral canals are routinely encountered and documented, there also exists the rare possibility of a fewer number of canals than normal. Early detection of such an occurrence is critical to the prevention of iatrogenic errors during endodontic treatment. The advent of spiral CT as a diagnostic tool serves as a much needed confirmation to understand the complex three dimensional anatomy of teeth...
September 2017: Journal of Clinical and Experimental Dentistry
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