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Dental Specialties

What are the Applications and Limitations of Conventional Radiographic Techniques?

This resource is provided courtesy of Wiley Publishing. Read and download the resource in PDF   Watch the video presentation Source: Clinical maxillary sinus elevation surgery, Wiley Blackwell, 2014

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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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Do I have to treat a discoloured primary tooth?

When a primary tooth discolours and turns grayish, it is usually secondary to a traumatic episode. The discolouration indicates a necrotic pulp or that hemorrhaging has occurred and entered the dentinal tubules and can appear within a month of the original injury. The tooth may exhibit a light gray colour initially but may progressively darken. Occasionally, the tooth may present with a yellowish colour due to calcific degeneration of the pulpal tissues. Treatment of these teeth is not always indicated unless there is evidence of pathology. As such, appropriate examination and follow-up is necessary in these cases. Source: Dental Secrets, ...

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Are diastemas normal and when should I consider diastema closure?

Midline diastemas in the primary dentition are common. They are usually associated with a thick maxillary frenum attachment and do not warrant treatment. However, clinicians should appropriately assess large midline diastemas in the primary dentition to rule out the presence of supernumerary teeth. In the permanent dentition, maxillary central incisors erupt buccal to the primary centrals and their eruption often creates a midline space. However, as the lateral incisors erupt, the space tends to close and complete closure of this space occurs once the permanent canines erupt. If there is any remaining midline space, this can be addressed orthodontically or ...

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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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