What are the fish zones in endodontics?

The zones of Fish are 1) Infection/Necrosis containing bacteria and polymorphonuclear neutrophil leukocytes, 2) Contamination containing bacterial toxins and macrophages, 3) Irritation containing osteoclasts and plasma cells and, 4) Stimulation containing osteoblasts and fibrobalsts.

What is zone of infection?

Zone A: Area of Infection (PMN and microorganisms) Zone B: Area of Contamination (round cells, toxins and lymphocytes) Zone C: Area of Irritation (histiocytes, osteoclasts, toxins and some normal cells) Zone D: Area of Stimulation (fibroblasts, osteoblasts, and collagen fibers)

What is the use of H file in endodontics?

H-files are specially designed for shaping canals after they are previously cleaned and enlarged with K-files in root canal treatment. The H file can effectively enlarge the canal during filling motion.

What is the principle of root canal treatment?

The basic principles on which successful endodontic therapy depends have been commonly accepted as (1) debridement, (2) sterilization and (3) obturation. Each of these principles is subjected to critical evaluation. Because of the morphological complexity of most root canals complete debridement is not possible.

What are the zones of fish?

FOUR FISH ZONES IN ENDODONTICS

• Zone of Infection (Polymorphonuclear Cells PMNs)
• Zone of Contamination (Round Cell Infiltration)
• Zone of Irritation (Macrophages and Osteoclasts)
• Zone of Stimulation (Fibroblasts and Osteoblasts)

Why is it called Phoenix abscess?

A phoenix abscess is an acute exacerbation of a chronic periapical lesion. It is a dental abscess that can occur immediately following root canal treatment. Another cause is due to untreated necrotic pulp (chronic apical periodontitis). It is also the result of inadequate debridement during the endodontic procedure.

What is PAP In dental terms?

A periapical abscess is a collection of pus at the root of a tooth, usually caused by an infection that has spread from a tooth to the surrounding tissues.

What is apical scar?

An apical scar is a scar that is found at the apex of a tooth from dense connective tissue. It is generally found after there has been a surgical procedure or endodontic treatments. The most common procedures that lead to these scars are procedures dealing with the root of a tooth.

What is K file and h file?

All K-files are mainly intended for rotary motions inside the canals. On the other hand, H-files are specially designed for shaping canals after they are previously cleaned and enlarged with K-files. They are made out of the ground wire and have a tear-drop cross-sectional shape.

What is K file?

K files are the universal standard for canal negotiation, shaping, and recapitulation of root canal systems. They are generally used with a quarter turn “watch-winding” motion and vertical pull.

Which cement is used in root canal?

Filling of the cleaned and decontaminated canals is done with an inert filling such as gutta-percha and typically a zinc oxide eugenol-based cement. Epoxy resin is employed to bind gutta-percha in some root canal procedures.

What is Endo sealer?

Endodontic sealers can be categorized as containing Eugenol or not containing Eugenol. The component Zinc Oxide Eugenol can be placed in the root canal cavity temporarily to reduce inflammation and sensitivity. Application of endodontic sealers can be via syringe, hand mix and premeasured capsules.