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Endodontics

What is the best antibiotic for orofacial infections of an endodontic nature?

Infections of an endodontic nature that are associated with orofacial pain are typically caused by obligate anaerobic bacteria. Given the spectrum of action, penicillins are the preferred antibiotic of choice. Drugs in this class act against the obligate anaerobes but, also affects the substrate interrelationships amongst various bacterial strains within the infection. As some of the strains of bacteria start to die, the others are unable to survive. The penicillins include amoxicillin as well as Augmentin (an amoxicillin and clavulanate combination). When penicillin is not effective, clindamycin may be used as it acts against anaerobic bacteria. However, clinician’s should use ...

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What kind of materials can be used to obturate root canals?

While other materials are available for obturating root canals, gutta percha is still the most widely used and accepted material. Gutta perch is biocompatible, inert material which does not irritate tissues. Composed of zinc oxide, barium sulfate and transpolyisoprene, gutta percha has the ability to adapt to root canal walls. Resilon, a thermoplastic polymer which contains bioactive glass, has become increasingly popular as a filling material recently. This technique involves the creation of a chemical bond between the sealer and filling material. Other paraformaldehyde-containing pastes have been proposed but, due to antigenic and cytotoxic effects on tissue, these have not ...

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What is the Differential Diagnosis and How Would you manage this Case?

This case is presented by Dr. Robert Bouclin Watch the Case Presentation   We welcome your feedback about this case. You have the option to remain anonymous in leaving your feedback. Please note that all your comments are moderated by the CDA Oasis Team and no comments go live immediately. Your feedback is sent to us in the form of an email which is accessed by the CDA Oasis Team and is not shared by a third party. You can safely leave your name and email allowing us to contact you, if needed, and that information will remain confidential at all ...

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Which bacteria are most commonly associated with failed endodontic cases?

Three species of bacteria are most commonly implicated in the failure of endodontic treatment. The microorganisms colonize dentinal walls and any debris that is pushed through the apex as well as dentine tubules of pulpless necrotic teeth. Enterococcus faecalis Associated with 30-40% of failed root canal treatments May be resistant to calcium hydroxide as well as chemomechanical endodontic processes Increased tendency to be resistant to antibiotics Actinomyces Can survive for long periods of time without causing host responses and is therefore, considered to have low pathogenicity Causes chronic infections Lives in necrotic pulpal and infected periapical tissues Streptococcus anginosus, Streptococcus ...

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What can cause root canal treatments to fail?

Root canal treatment failures can be attributed to two main causes: microbial or non-microbial. MICROBIAL causes can either be intra- or extra-radicular in nature Intraradicular Microorganisms found in root-canal-treated teeth with persisting periapical disease are different from those found in untreated teeth. The majority of bacteria found in treated teeth are Gram positive facultative anaerobes which reside in accessory canals, along the root-filling material in the main canal and in the dentinal tubules. There is no evidence to suggest that certain bacterial species are resistant to treatment. However, the existence of bacteria in treated teeth could mean that they have ...

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CDA Oasis Resource: What is the goal of vital pulp therapy?

The goal of vital pulp therapy is to preserve or regenerate tissues of the pulp-dentine complex of affected teeth and includes: direct and indirect pulp-capping, pulpotomy and more recently, regenerative pulp therapy. Pulp tissue may become compromised due to caries, loss of tooth structure/surface, traumatic injury or operatively as a result of cavity preparation. However, before treating the pulp-dentine complex, practitioners must be able to predict the extent of injury to the pulp tissues and treat it with the most suitable approach for the situation and seal it with a restoration that will prevent microleakage. After a vital pulp therapy ...

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What is the incidence and related factors of middle mesial canals in mandibular molars?

This summary is based on the article published in the Journal of Endodontics: Middle Mesial Canals in Mandibular Molars Incidence and Related Factors (January 2015) Ali Nosrat, DDS, MS, Raney J. Deschenes, DMD, MS, Patricia A. Tordik, DMD, M. Lamar Hicks, DDS, MS, and Ashraf F. Fouad, BDS, DDS, MS Context The aim of root canal therapy is to eliminate all irritants from the root canal system. These irritants include necrotic pulp tissue, microorganisms, and their byproducts. A detailed knowledge of the pulp canal anatomy is necessary to effectively clean and shape the root canal system. Mandibular molars are the ...

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How does tooth retention through endodontic microsurgery compare to tooth replacement using an implant supported single crown

This summary is based on the article published in the Journal of Endodontics: Tooth Retention through Endodontic Microsurgery or Tooth Replacement Using Single Implants: A Systematic Review of Treatment Outcomes (January 2015) Mahmoud Torabinejad, DDS, MSD, PhD, Maria Landaez, DDS, Marites Milan, DDS, MS, Chun Xiao Sun, DDS, MS, Jeffrey Henkin, DDS, MS, Aladdin Al-Ardah, DDS, MS, Mathew Kattadiyil, DDS, MDS, MSD, Khaled Bahjri, MD, DrPH, MPH, Salem Dehom, MPH, Elisa Cortez, MILS,¶ and Shane N. White, BDentSc, MS, MA, PhD Context Clinicians are regularly confronted with difficult choices. Should a tooth that has not healed through nonsurgical root canal ...

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