In pediatric endodontics, what is a common resorbable paste used for pulpectomy and what is its key property?

Study for the Pediatric Dentistry II Exam. Utilize flashcards and multiple choice questions with hints and explanations. Prepare thoroughly for your exam!

In pediatric pulpectomy, the key idea is to use a filling paste that will resorb in step with the natural resorption of the primary tooth root, so it doesn’t obstruct eruption. Metapex, a calcium hydroxide with iodoform paste, fits this requirement well. It resorbs along with the roots and provides adequate canal obturation, ensuring the canal is sealed without leaving material behind once the tooth is ready to exfoliate. The calcium hydroxide gives antimicrobial activity (high pH) and the iodoform adds radiopacity and supports predictable resorption. Other pastes like ZOE don’t resorb at the same rate as the roots and can linger after eruption, potentially causing issues, while GIC paste and resin cement aren’t used as resorbable pulpectomy fillers in primary teeth because they don’t align with the eruption timing.