Which of the following is/are true regarding a tooth filled with a formaldehyde-containing paste?

1 explanations

1. 

   oneguy

   The formaldehyde component of the medications have been implicated for exerting potentially harmful systemic and local effects. Formaldehyde-containing pastes has been shown to have a high incidence of nerve toxicity. Zinc oxide–eugenol (ZOE) paste and ZOE paste modified with paraformaldehyde have been found to alter dog pulp tissue, making it antigenetically active. Studies have shown that formaldehyde-containing sealers were highly toxic. Reaction to the physical and chemical trauma of formaldehyde periradicularly can be very severe and there are case reports of parasthesia following overextrusion of such a paste in the vicinity of the mandibular nerve. Formaldehyde-containing pastes remain non-approved.

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