Download or read book Mode d action de l hypochlorite de sodium sur le biofilm endodontique written by Audrey Louzoun and published by . This book was released on 2016 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les bactéries présentes dans les canaux endodontiques sont organisées sous forme de biofilm. Cette communauté bactérienne est plus difficile à aseptiser que des bactéries sous forme planctonique. En effet, le biofilm met en place un mutualisme entre les bactéries, leur permettant d'augmenter leur résistance. Mais, c'est aussi la présence d'une matrice d'exopolymères qui diminue la pénétration d'antibiotiques ou d'antiseptiques tel que l'hypochlorite de sodium. L'irrigation est l'une des trois étapes interdépendantes d'un traitement endodontique : la mise en forme, l'irrigation et l'obturation. L'hypochlorite de sodium, selon de nombreuses études, est la solution d'irrigation la plus adéquate à la désinfection canalaire lors d'un traitement endodontique. Comprendre son fonctionnement et ses modalités d'application semble incontournable pour réaliser une bonne élimination bactérienne au cours d'un traitement endodontique. Le chirurgien dentiste doit choisir une concentration d'hypochlorite de sodium suffisamment efficace pour éliminer les micro-organismes tout en ayant une cyto-toxicité acceptable. Les études in vitro et in vivo portant sur l'activité anti-bactérienne de l'hypochlorite de sodium montrent des résultats différents dus, d'une part, à l'organisation bactérienne sous forme de biofilm difficilement reproductible in vitro, et d'autre part à l'environnement particulier des canaux formés de dentine et contenant un exsudat inflammatoire. Le pouvoir anti-bactérien d'une solution d'hypochlorite de sodium à faible concentration peut être augmenté par une hausse de la température, du temps de contact au sein du canal et du volume d'irrigation.

Download or read book L hypochlorite de sodium en endodontie written by Marie Viscardi and published by . This book was released on 2012 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'irrigation a un rôle central dans le traitement endodontique. Le succès du traitement endodontique dépend de l'élimination des microorganismes présents dans le réseau canalaire. Une première partie théorique expose la problématique de l'irrigation canalaire au travers de rappels sur l'endodonte, la dent infectée, l'enduit pariétal et l'irrigation canalaire. Les propriétés de l'hypochlorite de sodium seront traitées dans une revue de littérature. Une deuxième partie expérimentale étudie in vitro, l'action et l'effet de l'hypochlorite de sodium sur un modèle de biofilm composé de protéines et polysaccharides.

Download or read book Evaluation de la d sinfection endodontique des dents par le laser Er written by Charlotte Delon and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La colonisation bactérienne est la première cause du développement des maladies pulpaires et péri-apicales. Le traitement endodontique doit allier une mise en forme canalaire et une irrigation optimale pour améliorer l'élimination du biofilm bactérien installé. L'hypochlorite de sodium est aujourd'hui l'irrigant de choix en endodontie. Plusieurs méthodes permettent de l'activer pour potentialiser ses effets, dont l'activation photonique. Le laser Er : YAG permettrait de rendre plus actif l'hypochlorite de sodium, et de favoriser la désorganisation du biofilm bactérien par propulsion de la solution. Nous avons réalisé une étude expérimentale ex vivo afin de mettre en évidence cette action présumée du laser Er : YAG.

Download or read book D sinfection endodontique written by François Jussiaux and published by . This book was released on 2020 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malgré l’usage de solutions d’irrigation hautement bactéricides telles que l’hypochlorite de sodium ou la chlorhexidine au cours du traitement endodontique, les micro-organismes colonisant l’espace endodontique survivent notamment grâce à leur organisation sous forme de biofilm. Le biofilm est une communauté de micro-organismes protégée par une matrice extra-cellulaire, limitant ainsi le contact entre les solutions de désinfection et les micro-organismes cibles. De nouvelles perspectives en recherche s’orientent vers l’utilisation d’enzymes comme prétraitement des biofilms, celles-ci ayant déjà montré des effets intéressants sur d’autres biofilms. L’intérêt de l’usage des enzymes repose dans leur capacité à désorganiser le biofilm facilitant ainsi le contact entre les solutions de désinfection et les pathogènes. Ce travail comportera une première partie sur les spécificités du biofilm en endodontie, puis nous ferons un état des lieux des méthodes d’irrigation actuelles et en développement. Enfin, la dernière partie sera consacrée à la présentation d’une étude in vitro réalisée sur les effets des pré-traitements enzymatiques sur un modèle de biofilm oral multi-espèces.

Download or read book IN VITRO EFFECT OF SODIUM HYPOCHLORITE ON STREPTOCOCCUS MUTANS MONO SPECIES BIOFILM written by Shikhah Alajmi and published by . This book was released on 2017 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives: Bacterial biofilms are ubiquitous, found in a variety of sites within the human body, and are associated with the pathogenesis of dental caries. They are formed when free-floating microorganisms attach to a surface. One such organism, Streptococcus mutans, has adhesins allowing its attachment to tooth surfaces. S. mutans is associated with all forms of human dental caries. S. mutans can rapidly metabolize dietary sugars to acid, locally creating a low pH on tooth surfaces, where it can optimally grow and become more competitive in dental plaque biofilms, in contrast to acid-sensitive bacterial species associated with sound non-carious tooth surfaces. Commensal and natural biofilm aggregates contain multiple microbial species that are believed to co-exist, interact, and form families with high bacteria and niche diversity. In contrast, most biofilms that are chronically infectious tend to have low bacterial diversity with sovereign mono-species such as S. mutans. Hence, it is advantageous to study mono-species biofilms of dental caries-associated bacteria. Although dental biofilms cannot be completely eliminated, their pathogenicity can be lessened through effective oral hygiene measures. Continuous and regular disruption of dental biofilms is imperative for prevention and management of oral infectious diseases. Mechanical methods, most notably tooth brushing and flossing, are required to regularly and effectively disrupt dental plaque biofilms in the human oral cavity. Antiseptics, such as mouth rinses, can also help control dental plaque biofilms, and may gain access to oral sites inaccessible by mechanical methods. Among available antiseptics, sodium hypochlorite is a particularly potent agent against bacteria, fungi, and viruses. Sodium hypochlorite occurs naturally within phagocytic cells (neutrophils, monocytes, and macrophages) participating in the human innate immune response to microbial infection. Several randomized controlled clinical trials support the efficacy of rinsing twice weekly with 0.25 % sodium hypochlorite to improve periodontal health. To date, no studies have been reported concerning the effect of sodium hypochlorite rinsing on dental caries incidence or progression. Several in vitro studies have addressed the effect of dilute sodium hypochlorite on various oral bacteria species. However, there are no literature reports addressing the effect of sodium hypochlorite on bacteria attached to solid surfaces in biofilms. Hence, the objective of this study is to compare the in vitro antimicrobial effect of sodium hypochlorite to another antiseptic agent, chlorhexidine, on the acidigenic and aciduric bacterial species, S. mutans and Lactobacillus casei, both in a free-form (planktonic) state, and as a biofilm attached to two hard surfaces (glass and hydroxyapatite). Methods: The effect of sodium hypochlorite on S. mutans and L. casei was determined by finding the minimum inhibitory concentration (MIC) by broth dilution assays. The MIC was considered to be the lowest concentration of the agent that prevented bacterial growth, resulting in a clear test tube in a broth dilution assay. Experiments with sodium hypochlorite were repeated twice against each bacterial species, and compared to chlorhexidine in similar assays. The effect of a 20-second exposure of MIC concentration (1.0%) of sodium hypochlorite on the growth of S. mutans planktonic cells was measured. Finally, the effect of a 20-second exposure of 1% hypochlorite on S. mutans single-species biofilms was assayed using sterile microplates and the MBEC Biofilm Inoculator (Innovatech). Results: Values for inhibition of growth of planktonic cells were as follows: sodium hypochlorite (MIC = 0.1%; MBC = 0.1%); chlorhexidine (MIC = 0.0015%; MBC = 0.0025%). A 20-second exposure to either solution at the MBC inhibited growth of planktonic cells in refreshed media. Cells adherent to glass or hydroxyapatite pegs were growth-inhibited, but not detached, in refreshed media by a 20-second exposure to 0.2% and 0.4% sodium hypochlorite, and 0.01% and 0.12 % chlorhexidine, but not by more dilute solutions. Conclusions: Chlorhexidine is more potent than sodium hypochlorite, but dilute solutions of both antimicrobial agents inhibited growth of S. mutans mono-species biofilm cells without detachment of cells.

Download or read book Comment optimiser la solution d hypochlorite de sodium en endodontie written by Benjamin Benzaquen and published by . This book was released on 2016 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: La 4e de couverture indique : "Grâce à l’avènement et aux progrès de la rotation continue, les traitements endodontiques deviennent de plus en plus performants et rapides. Cela se traduit par une diminution importante de la durée d’action de la solution d’irrigation. Nous comprenons donc la nécessité de l’optimiser afin de maintenir et garantir une bonne qualité de désinfection chimique de l’endodonte, étape capitale dans le succès du traitement endodontique."

Download or read book Endodontic Irrigation written by Bettina Basrani and published by Springer. This book was released on 2015-07-17 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the available information on bacterial disinfection in endodontics, with emphasis on the chemical treatment of root canals based on current understanding of the process of irrigation. It describes recent advances in knowledge of the chemistry associated with irrigants and delivery systems, which is of vital importance given that chemical intervention is now considered one of the most important measures in eliminating planktonic microbes and biofilms from the infected tooth. Recommendations are made regarding concentrations, exposure times and optimal sequences. Possible complications related to the use of the different solutions are highlighted, with guidance on response. In addition, clinical protocols are suggested on the basis of both clinical experience and the results of past and ongoing research. Throughout, a practical, clinically oriented approach is adopted that will assist the practitioner in ensuring successful endodontic treatment.

Download or read book Textbook of Endodontology written by Gunnar Bergenholtz and published by John Wiley & Sons. This book was released on 2013-03-27 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Textbook of Endodontology continues the aim of serving the educational needs of dental students and dental practitioners searching for updates on endodontic theories and techniques. Significantly restructured and completely updated, the new edition maintains the ethos of the original, facilitating ease of learning through pedagogical features such as annotated references, core concepts and key literature. It features a number of new chapters on topics ranging from outcomes of endodontic treatment to managing endodontic complications to dental trauma. Additionally, all other chapters have been thoroughly revised and brought up to date to reflect contemporary knowledge and practice. Textbook of Endodontology continues its important function of providing lucid scholarship and clear discussion of biological concepts and treatment principles in endodontics, and as such will be an important update to its current readers and a valuable discovery to its new audience.

Download or read book Lasers in Endodontics written by Giovanni Olivi and published by Springer. This book was released on 2016-03-15 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers up-to-date information on all aspects of the use of lasers in endodontics, focusing especially on the various laser applications, including primary and permanent root canal therapies, retreatments, apical surgery and pulp therapy. Every laser technique used in endodontics is carefully described and illustrated, with detailed coverage of both conventional methods and more recent developments such as laser-activated irrigation and photon-induced photoacoustic streaming. In addition, a separate section addresses the basic science of laser dentistry, explaining the physics, describing laser–tissue interactions, and discussing different types of laser. Extensive reference is made to the international literature in order to provide the reader with a clear, evidence-based understanding of the merits of various approaches. In offering a balanced mix of descriptions of clinical applications, clinical data, scientific research and logical criticism, the book will serve as an excellent reference for a wide audience comprising general dentists as well as specialists.

Download or read book The Root Canal Biofilm written by Luis E. Chávez de Paz and published by Springer. This book was released on 2015-10-20 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the current state of research on the basic scientific aspects of root canal biofilm biology within a clinically applicable context. Root canal biofilms are complex polymicrobial structures adhering to the root canal surface that are formed by microorganisms invading the pulpal space of teeth, and are associated with persistent root canal infections. Concerted efforts to study root canal biofilms have been made in the past decade, resulting in the publication of observational and experimental studies that detail the morphology and biology of these structures in infected root canals. In addition to confirming that bacteria in root canals do not exist in free-floating planktonic states as previously assumed, this new information on root canal biofilm infections has provided an opportunity to re-evaluate conventional clinical protocols and improve endodontic therapeutic measures.

Download or read book Problem Solving in Endodontics written by James L. Gutmann and published by Mosby Elsevier Health Science. This book was released on 1992 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This latest edition continues to focus on those areas in endodontics that present the most difficulty in successful diagnosis and treatment. Key topics such as locating and negotiating fine and calcified canals, canal cleaning and shaping, root canal obturation, nonsurgical root canal retreatment, and management of endodontic emergencies are addressed in a systematic, problem-solving manner that stresses prevention of problems in treatment, identification of problems already present or occurring during the course of treatment, and management of such problems once they are recognized.

Download or read book Lasers in Oral and Maxillofacial Surgery written by Stefan Stübinger and published by Springer Nature. This book was released on 2020-03-25 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides surgeons with important insights into laser technologies as well as a sound understanding of their current and potential applications within oral and maxillofacial surgery and related disciplines. The opening chapters focus on the relevant physical background, the technology of the typically used lasers, laser–tissue interactions, and the treatment systems. Detailed information is then provided on the various established applications of laser treatments, including in relation to skin and mucosa and the dental hard tissues and bone. Special applications are also described, for example with respect to periodontal surgery, peri-implantitis therapy, photodynamic treatment, holography and additive manufacturing. The book closes by examining technologies that will soon be available for application in hospitals, topics which are currently the subject of research, and laser safety. Beyond surgeons, the book will be of value for engineers and scientists working in the field of medical engineering using lasers.

Download or read book Toxicology Handbook written by Lindsay Murray and published by Elsevier Australia. This book was released on 2011 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Toxicology Handbook 2e is a practical, didactic guide to the approach, assessment and management of poisoned patients. It has been written for hospital-based doctors at all levels and describes the risk assessment-based approach pioneered by the principal authors. the concise layout enables the reader to quickly locate information in a poisoning emergency. the book also features locally relevant information on bites, stings and envenoming. This book will also be useful for ambulance service paramedics and pharmacists.

Download or read book Ozone written by Edward Lynch and published by . This book was released on 2004 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent technical advances have made in possible to use ozone to small areas of dental hard tissues in the treatment of dental caries. This volume provides an overview of the technique, covering, among other topics, the history of ozone clinical applications, mechanisms of action, safety aspects, required equipment, evidence-based research on the tr

Download or read book Shaping for Cleaning the Root Canals written by Gustavo De Deus and published by Springer Nature. This book was released on 2021-11-25 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides clinicians with up-to-date, scientifically based guidance on the most important stages of endodontic treatment, i.e., cleaning and shaping of the root canal space, including mechanical preparation and chemical disinfection. Five internationally recognized experts present and discuss recent developments and new perspectives in the field. Important advances in root canal preparation and irrigation procedures are described with the aid of numerous high-quality illustrations. A key feature of the book is the detailed attention devoted to the latest research findings and to their impact on contemporary evidence-based clinical guidelines and modern clinical practice. On this basis, simple treatment protocols are proposed that take the anatomy of the root canals fully into account. In addition, emerging problems and trends are considered. The book will be an excellent resource for clinicians and advanced practitioners who are seeking to update their practice.

Download or read book Pulp dentin Biology in Restorative Dentistry written by Ivar Andreas Mjör and published by Quintessence Publishing (IL). This book was released on 2002 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a study of pulp and dentin in restorative dentistry. A basic understanding of the pulp-dentin complex is presented and its response to intraoral insults and restorative procedures described.

Download or read book Essential Endodontology written by Dag Orstavik and published by John Wiley & Sons. This book was released on 2020-01-21 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authoritative reference that continues to present a systematic analysis of the scientific basis of endodontology The third edition of Essential Endodontology: Prevention and Treatment of Apical Periodontitis has been revised and updated to include the most recent developments in the field, maintaining its position as the major scientific treatise of apical periodontitis. Making an often-complex subject more digestible, the book explores the scientific basis of endodontology, adopting a systematic analysis of the available clinical and laboratory evidence. Promoting apical periodontitis as a disease entity, the comprehensive third edition focuses on its biology and clinical features, enabling the reader to have a better understanding of its diagnosis, prevention and treatment. In addition to thorough updates and full colour illustrations throughout, a new chapter on regenerative endodontics has been added to this edition. Written with a focus on the scientific basis of endodontology Includes a new chapter on regenerative endodontics Presents the most current information and major developments in this fast-moving field Provides helpful learning outcomes in each chapter Contains full colour illustrations, enriching the text Features contributions from a noted panel of international experts, including new contributors from across the globe Regarded as a vital companion to the pursuit of excellence in postgraduate and specialist education, Essential Endodontology is an indispensable and accessible resource for practicing endodontists, postgraduate students of endodontology and those seeking professional certification in endodontology.