Root Filling Ideal Property — ORE Part 1 MCQ
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Correct answer: E — Excellent apical seal to prevent bacterial recontamination of the root canal system
The correct answer is E. An ideal root canal filling material must create an excellent apical seal to prevent bacterial recontamination and leakage of irritants into periapical tissues. This is the primary goal of root canal obturation. While other properties—such as biocompatibility, insolubility, and radiopacity—are important, the apical seal is the 'principal barrier to leakage' and prevention of reinfection. Distractor B is incorrect because ideal materials should be radiopaque, not radiolucent, for visibility on radiographs. Distractor C is wrong because ideal materials should be insoluble (not soluble) in tissue fluids to maintain long-term stability. Distractor D contradicts the requirement for biocompatibility, which is essential. Distractor E is clinically irrelevant and has no basis in endodontic evidence.
Reference: Resilon: A Comprehensive Literature Review. PubMed Central, 2013. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3779370/; Endodontic Materials Used To Fill Root Canals. PubMed, 2023. https://pubmed.ncbi.nlm.nih.gov/36508541/