Indications:
1. Pulp necrosis or gangrene.
2. Chronic apical periodontitis,
3. Pulp periodontal syndrome,
4. Not a systemic disease who Primary and secondary cavity examination should be done regularly need treatment or tooth extraction teeth were temporarily retained.
Surgical methods and procedures:
1. Root canal preparation: including top dental instruments exposing marrow, into the medullary cavity, cleaning of necrotic tissue, expand the root canal, teeth, washing and measurement of length.
2. Root canal disinfection: disinfection of commonly used drugs, most commonly used to aldehydes and phenols.
3. Root canal filling: 3-5 days after sealing sterilization drugs, such as symptoms, the root canal filling technique. Commonly used filling material plus solid paste. Solid as a gutta-percha, zinc oxide eugenol used for the cement paste.
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