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https://www.readbyqxmd.com/read/29327500/multiplex-polymerase-chain-reaction-detection-of-selected-bacterial-species-from-symptomatic-and-asymptomatic-non-vital-teeth-with-primary-endodontic-infections
#1
Smita Pattanshetty, Vijayalakshmi S Kotrashetti, Kishore Bhat, Ramakant S Nayak, Pradeep Somannavar, Madhu Pujar
AIM: The aim of the present study was to investigate the presence of selective anaerobic microorganisms in primary root canal infections of symptomatic and asymptomatic non-vital teeth with periapical pathosis using multiplex polymerase chain reaction. METHODS: A total of 100 root canal samples (50 from symptomatic and 50 from asymptomatic teeth) were obtained from patients with primary endodontic infections. DNA extracted from the samples was amplified by using specific primers for the 16S rRNA gene of each bacterium, and semiquantification was done to analyze the prevalence of microorganisms and their correlation to clinical features...
January 11, 2018: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/29327470/investigation-of-the-effect-of-rapid-and-slow-external-ph-increases-on-enterococcus-faecalis-biofilm-grown-on-dentine
#2
Mark Stenhouse, Peter Zilm, Jithendra Ratnayake, Peter Cathro
BACKGROUND: Calcium hydroxide is a common endodontic medicament and has an anti-microbial effect by increasing the localized pH within the root canal. However, Enterococcus faecalis has shown some resistance to calcium hydroxide. METHOD: A flow cell apparatus was used to grow an E. faecalis biofilm on dentine discs. Following 4 weeks growth in Todd Hewitt Broth, flow cells were exposed to either a rapid or slow increase to pH 11.5 or 12.5. Cellular viability was determined using serial plating and the number of colony forming units was normalised against the cellular protein content...
January 11, 2018: Australian Dental Journal
https://www.readbyqxmd.com/read/29327088/amplification-of-pressure-waves-in-laser-assisted-endodontics-with-synchronized-delivery-of-er-yag-laser-pulses
#3
Nejc Lukač, Matija Jezeršek
When attempting to clean surfaces of dental root canals with laser-induced cavitation bubbles, the resulting cavitation oscillations are significantly prolonged due to friction on the cavity walls and other factors. Consequently, the collapses are less intense and the shock waves that are usually emitted following a bubble's collapse are diminished or not present at all. A new technique of synchronized laser-pulse delivery intended to enhance the emission of shock waves from collapsed bubbles in fluid-filled endodontic canals is reported...
January 11, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29326513/an-in-vitro-comparison-of-pushout-bond-strength-of-resilon-with-metaseal-and-ah-plus-sealers
#4
Priyanka Sarangi, Rashmirekha Mallick, Sukanta Kumar Satapathy, Gaurav Sharma, Fathima Kouser, Satyajit Mohapatra
Aim: The aim of this study is to evaluate and compare the pushout bond strengths of Resilon with two different sealers: Resilon/MetaSEAL (methacrylate based) and Resilon/AH Plus (an epoxy resin-based sealer). Materials and Methods: Forty single canal anterior teeth were decoronated at cementoenamel junction and standardized to 10 ± 1 mm length. Working length was determined followed by biomechanical preparation. Then, the specimens were randomly assigned into two groups of 20 teeth each based on the sealer used with Resilon...
October 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29306533/microbial-analysis-of-endodontic-infections-in-root-filled-teeth-with-apical-periodontitis-before-and-after-irrigation-using-pyrosequencing
#5
Homan Zandi, Anne K Kristoffersen, Dag Ørstavik, Isabela N Rôças, José F Siqueira, Morten Enersen
INTRODUCTION: The root canal microbiota in root-filled teeth with post-treatment apical periodontitis before and after chemomechanical instrumentation and irrigation with either 1% sodium hypochlorite (NaOCl) or 2% chlorhexidine digluconate were analyzed by using the pyrosequencing method. METHODS: Samples from 10 root-filled teeth with apical periodontitis undergoing retreatment were taken before (S1) and after (S2) preparation using irrigation with either NaOCl (n = 5) or 2% chlorhexidine digluconate (n = 5)...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29302286/management-of-permanent-teeth-with-necrotic-pulps-and-open-apices-according-to-the-stage-of-root-development
#6
Hugo Plascencia, Mariana Díaz, Gerardo Gascón, Susana Garduño, Carlos Guerrero-Bobadilla, Salvador Márquez-De Alba, Geovani González-Barba
Background: This paper analyzed the distribution of treatments for permanent teeth with necrotic pulps and open apices according to the stage of root development. Material and Methods: Dental records from all root canal procedures performed in permanent teeth with necrotic pulps and open apices over a period of 14 years by residents of the Speciality of Endodontics, University of Guadalajara, Mexico, were analized. Results: Records from 206 treatments were mainly divided into the following 3 different stages according to criteria described by Cvek: stage IV (n = 79, 38...
November 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29301094/induced-post-traumatic-apexification-20-year-follow-up-and-morphological-study-after-new-fracture
#7
Federica Fonzar, Leopoldo Forner, Riccardo Fabian-Fonzar, Carmen Llena
Apexification is an endodontic technique used in immature necrotic teeth, the primary goal of which is to induce a calcified barrier in roots with open apices and to promote the continuation of apical root development. A 7-year-old patient with a coronal fracture in a maxillary central incisor was treated with an apexification technique using calcium hydroxide. The apical closure was obtained after one year, then a permanent root canal filling was performed. The tooth was monitored for a period of 20 years, up to when a trauma caused its extraction...
January 1, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29299189/in-vitro-resistance-to-fracture-of-two-nickel-titanium-rotary-instruments-made-with-different-thermal-treatments
#8
Gabriele Miccoli, Gianfranco Gaimari, Marco Seracchiani, Antonio Morese, Tatyana Khrenova, Dario Di Nardo
Aim: Aim of the study was to evaluate effectiveness of different heat treatments in improving Ni-Ti endodontic rotary instruments' resistance to fracture. Methods: 24 new NiTi instruments similar in length and shape: 12 M3 instruments, tip size 25 and .06 taper (United Dental, Shanghai, China), and 12 M3 Pro Gold instruments tip size 25 and .06 taper (United Dental, Shanghai, China), were tested in a 60° curved artificial root canal. Each group received a different heat treatment...
April 2017: Annali di Stomatologia
https://www.readbyqxmd.com/read/29285826/a-cone-beam-computed-tomography-study-of-the-anatomical-relationships-between-mandibular-teeth-and-the-mandibular-canal-with-a-review-of-the-current-literature
#9
Umut Aksoy, Seçil Aksoy, Kaan Orhan
The purpose of this study was to evaluate age- and sex-related changes in the anatomical relationships between the roots of the molars and premolars and the mandibular canal using cone-beam computed tomography (CBCT) images. A total of 243 patients (116 males, 127 females) aged 16-83 years for whom previous CBCT scans were available were enrolled in this study. The patients were subcategorized by sex and age (Group I, <21 years; Group II, 21-40 years; and Group III, >40 years). The distances between the mandibular canal and the molars and premolars were measured...
December 29, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29284973/successful-nonsurgical-management-of-periapical-lesions-of-endodontic-origin-a-conservative-orthograde-approach
#10
J V Karunakaran, Chris Susan Abraham, A Kaneesh Karthik, N Jayaprakash
Periapical lesions of endodontic origin are common pathological conditions affecting periradicular tissues. Microbial infection of pulpal tissues is primarily responsible for initiation and progression of apical periodontitis. The primary objective of endodontic therapy should be to restore involved teeth to a state of normalcy nonsurgically. Different nonsurgical management techniques, namely, conservative root canal therapy, decompression technique, method using calcium hydroxide, aspiration-irrigation technique, lesion sterilization and tissue repair therapy, active nonsurgical decompression technique, and the apexum procedure have been advocated...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29284463/clinical-studies-on-core-carrier-obturation-a-systematic-review-and-meta-analysis
#11
Amy Wai-Yee Wong, Shinan Zhang, Samantha Kar-Yan Li, Chengfei Zhang, Chun-Hung Chu
BACKGROUND: This systematic review aimed to evaluate the clinical performance of core-carrier obturation in endodontic treatment. METHODS: Keywords of "(core carrier OR Thermafil) OR (cold lateral condensation OR lateral condensation) OR (warm vertical condensation OR vertical condensation) AND (obturation OR root canal filling) AND clinical study" were searched for all obtainable publications up to year 2017 in the databases of PubMed, ScienceDirect, EMBASE, Scopus and Web of Science...
December 29, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29284426/the-morphology-of-maxillary-first-and-second-molars-analyzed-by-cone-beam-computed-tomography-in-a-polish-population
#12
Katarzyna Olczak, Halina Pawlicka
BACKGROUND: The success of endodontic treatment is greatly affected by the location of the root canals. The purpose of this study was to evaluate the root and canal morphology of permanent maxillary first and second molars in a Polish population using cone-beam computed tomography scanning. METHODS: Cone-beam computed tomography (CBCT) scans of maxillary first and second molars the maxilla were examined. The number of roots and root canals, and the frequency of additional canals (MB2) in the mesiobuccal root canals were determined...
December 29, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29282172/management-of-a-permanent-maxillary-lateral-incisor-with-vital-pulp-and-necrotic-dens-invaginatus-type-iii
#13
Thais Rodrigues Campos Soares, Luciana Pereira da Silva, Patrícia de Andrade Risso, Lucianne Cople Maia, Laura Guimarães Primo
This is a case report on the management of a vital lateral incisor with a radiolucent cervical area associated with the presence of necrotic pulp due to a dens invaginatus (DI) type III. A nine-year-old boy presented to a university pediatric dental clinic with dental trauma. The examination showed poor oral hygiene, an uncomplicated fracture in the permanent maxillary left central incisor, and a fistula near the permanent maxillary right lateral incisor. A radiograph showed that the right lateral incisor had incomplete root development and a type III DI...
September 15, 2017: Journal of Dentistry for Children
https://www.readbyqxmd.com/read/29279615/antimicrobial-activity-of-root-canal-irrigants-against-biofilm-forming-pathogens-an-in-vitro-study
#14
Sheetal Basavraj Ghivari, Haimanti Bhattacharya, Kishore G Bhat, Madhu A Pujar
Aims: The aim of the study was to check the antimicrobial activity of the 5% Sodium hypochlorite, 2% Chlorhexidine, 0.10% Octenidine (OCT), and 2% Silver Zeolite (SZ) at different time intervals against a single species biofilm of Enterococcus faecalis, Staphylococcus aureus, and Candida albicans model prepared on a nitrocellulose membrane. Settings and Design: In vitro nitrocellulose biofilm model was used to check antibacterial efficacy of root canal irrigants...
May 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29275849/management-of-intruded-immature-maxillary-central-incisor-with-pulp-necrosis-and-severe-external-resorption-by-regenerative-approach
#15
Giorgos N Tzanetakis
INTRODUCTION: Intrusive luxation is one of the most severe traumatic injuries of permanent teeth that may adversely affect the pulp and the periodontium. Pulp necrosis and root resorption are the main pathologic entities associated with this injury. The present report describes the endodontic management of an intruded immature maxillary central incisor presented with pulp necrosis and severe inflammatory root resorption by using the regenerative approach. METHODS: A 7-year-old boy with dental trauma to the anterior maxillary region was referred for the management of a traumatized maxillary central incisor...
December 21, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29273493/does-the-orifice-directed-dentin-conservation-access-design-debride-pulp-chamber-and-mesial-root-canal-systems-of-mandibular-molars-similar-to-a-traditional-access-design
#16
Prasanna Neelakantan, Khadija Khan, Geoffrey Pak Hei Ng, Chui Ying Yip, ChengFei Zhang, Gary Shun Pan Cheung
INTRODUCTION: Despite the increasing reports on mechanical aspects of contracted endodontic access cavities (CECs), we believe that the biological aspects (debridement) have not been adequately investigated. This study examined if 1 type of CEC (orifice-directed dentin conservation [DDC] access) was able to debride the pulp chamber, root canals, and isthmus of mesial roots of mandibular molars similar to a traditional endodontic access cavity (TEC). METHODS: Mandibular molars (N = 32) were selected and divided randomly into 2 experimental groups (n = 12) after micro-computed tomographic scanning (group 1: TEC and group 2: DDC) and histologic controls (n = 8)...
December 19, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29259369/endodontic-management-of-contralateral-mandibular-first-molars-with-six-root-canals
#17
Kambhampati Bhargav, Kantheti Sirisha, Mandava Jyothi, Mohan Rao Boddeda
The knowledge of variations in root canal morphology is essential for a successful endodontic outcome. Contralateral mandibular molar with six root canals is a rare entity. Root canal treatment of mandibular molars with aberrant canal configuration can be diagnostically and technically challenging. While dealing with variant mandibular molars, mishaps may happen. This case report describes variations in contralateral mandibular molars and also an endodontic mishap while managing them.
July 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29259367/cone-beam-computed-tomography-as-advanced-diagnostic-aid-in-endodontic-treatment-of-molars-with-multiple-canals-two-case-reports
#18
Amit Pralhad Kamble, Rohini Rangarao Pawar, Sudha Mattigatti, T M Mangala, Saleem Makandar
The purpose of these case reports is to emphasize the importance of knowledge regarding the root canal morphology and current diagnostic aids one should have as both of these important factors going to affect the prognosis of the endodontic treatment. These two case reports describe the maxillary and mandibular first molars with multiple canals. After clinical and radiographic diagnosis, additional help of cone-beam computed tomography (CBCT) of mandibular molar has been taken to evaluate the morphology and canal pattern; while maxillary molar was evaluated using CBCT scan to evaluate the canal configuration and obturation...
July 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29259365/a-comparative-clinical-evaluation-of-accuracy-of-six-apex-locators-with-intraoral-periapical-radiograph-in-multirooted-teeth-an-in-vivo-study
#19
Prahlad A Saraf, P Ratnakar, Thimmanagowda N Patil, Raghavendra Penukonda, Laxmikant Kamatagi, Sneha S Vanaki
Aim: The purpose of this clinical study was to compare and clinically, to evaluate the accuracy of six apex locators with intra oral periapical (IOPA) radiograph in multirooted teeth. Materials and Methods: A total of 90 multirooted teeth (maxillary and mandibular molars) with irreversible, infected or necrotic pulp tissue and completely formed roots were included in this study and were divided randomly into six groups (Root ZX II, Raypex 6, I-Root, Romiapex A-15, Sybron Endo Mini and Root ZX mini)...
July 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29259360/influence-of-root-canal-obturation-using-gutta-percha-with-three-different-sealers-on-root-reinforcement-of-endodontically-treated-teeth-an-in-vitro-comparative-study-of-mandibular-incisors
#20
Pravin Patil, Kulwinder Singh Banga, Ajinkya M Pawar, Sandeep Pimple, Raguram Ganeshan
Aim: The purpose of this in vitro study was to evaluate the vertical force required to fracture mandibular incisor teeth, obturated using gutta-percha with three different sealers. Materials and Methods: Seventy-five extracted mandibular incisors with intact and fully formed apices, exhibiting single root and canal were acquired. The teeth were decoronated obtaining a root segments of 15 mm and were divided into five groups (n = 15). Group 1: left uninstrumented and unfilled (negative control)...
July 2017: Journal of Conservative Dentistry: JCD
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