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Explain the Radiographic Failure of Root Canal Treatment
It is the persistence or development of pathosis radiographically. Specifically, this is a radiolucent lesion that has remained the same, has enlarged, or has developed since treatment.
Nonfunctional, symptomatic teeth with or without radiographic lesions are considered failure (nonhealed).
Failure:
A. Apparently adequate root canal treatment. Tooth was restored later w/ a post & core and crown.
B. The patient reports persistent discomfort after 2 years. Periradicular radiolucency indicates failure, probably a result of coronal leakage at a defective margin (arrow). Surgery was required (root-end resection and filling) because of restoration.
ASSISTING IN PROCEDURE OF BIOPSY Biopsies are removal of a small piece of tissue for examination under microscope. Such examinations are called hist to pathological examina
Plant Responses to Light-Dark Cycles Based on their requirement for day length (number of hours of light) for flowering plants have been grouped under three major categories,
Epidemiological studies The use of available data from the positive epidemiological studies in the risk assessment is encouraged. Data derived fiom human clinical studies, s
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what is phylum
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