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Tree remains that have undergone petrifaction, as seen in Petrified Forest National Park. In geology, petrification (from Ancient Greek πέτρα (pétra) 'rock, stone') is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.
To achieve healing of the periapical lesion, one must obtain and maintain a decontaminated root canal system. System is to be emphasized, because the root canal system does not merely consist of tapering cone-shaped canals from orifice to apex , but rather, can and often is an intricate labyrinth of canals that diverge and weave to form an ...
When the root is incompletely formed in adolescents and an infection occurs, apexification can be performed to maintain the tooth in position as the roots develop. In case of non-vital pulp: 1. Isolate the tooth with a rubber dam 2. perform root canal treatment. 3. Mix MTA and insert it to the apex of the tooth, creating a 3 mm thickness of ...
Actinomyces, a bacterium that is found inside the canal, has the ability to degrade trans-1,4-polyisoprene. The internal root canal system in-vivo is anaerobic but even without the presence of bacteria, the C=O polymer chain will be lysed slowly into OH and C=O over time. Particularly during the presence of a periapical lesion, the penetration ...
It must have enough structure to support restoration. Filling the root canals of the tooth from the crown (orthograde root canal therapy) should be the first treatment option to resolve inflammation caused by the tooth. Periradicular surgery is only considered if the inflammation persists after conventional root canal treatment.
A Lentulo spiral. The notches at left allow it to fit into a slow-speed latch handpiece. A Lentulo spiral is a dental instrument used to properly distribute root canal sealer and cement evenly throughout the root canal system, as when performing endodontic therapy or a post and core cementation.
These teeth often have thin root canal walls which are susceptible to fracture after treatment. Therefore, complete cleaning and shaping as well as obturation of these teeth are difficult or sometimes impossible, due to high risk of fracture during the procedure [ 48 ] Clinical outcome of regenerative endodontics can be observed within 6 months ...
Alabama rot, Greenetrack disease, or cutaneous and renal glomerular vasculopathy (CRGV) [1] is an often fatal condition in dogs. It was first identified in the US in the 1980s in greyhounds. [2] [3] The high number of affected dogs at the Greenetrack Racing Park, Alabama, led to the initial pseudonyms of Greenetrack Disease and Alabama Rot. [4]