Which intracanal medicament causes protein coagulation:
- a- Formocresol.***
- b- Naocl
- c- Wad...
- D- Hydrogen peroxide.
The correct answer is (a) Formocresol.
Formocresol is an intracanal medicament that is used to disinfect and preserve dentin. It contains formalin, which is a protein coagulant. When formocresol comes into contact with protein, it causes the protein to denature and form cross-links. This cross-linking makes the protein insoluble and resistant to degradation.
The other answer choices are incorrect because:
- (b) Naocl is a sodium hypochlorite solution that is used to disinfect root canals. It does not cause protein coagulation.
- (c) Wad is a type of dressing that is used to keep medicaments in place in root canals. It does not cause protein coagulation.
- (d) Hydrogen peroxide is a disinfectant that is used to clean root canals. It does not cause protein coagulation.
Therefore, the only intracanal medicament that causes protein coagulation is formocresol.
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Pedodontics