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 […]
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. […]
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 […]
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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 […]
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 […]
Drs. Christine Chambers and Ross Anderson joined Dr. John O’Keefe to present ideas about how to deal with children who are anxious and fearful of dental treatment. Dr. Christine Chambers Dr. Christine Chambers is a clinical psychologist and Professor of Pediatrics and Psychology. Her research, based in the Centre for Pediatric Pain Research (IWK Health Centre), […]
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, […]