Nayyar Core Technique — ORE Part 1 MCQ
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Correct answer: D — To form a corono-radicular core in a root-treated posterior tooth without a separate post
Explanation lettering: D = shown as A · E = shown as C · A = shown as D · C = shown as E
The Nayyar technique is a direct corono-radicular amalgam core build-up for an endodontically treated posterior tooth. Amalgam is extended into the pulp chamber and canal orifices to obtain retention for the core, so a separate prefabricated or cast post is not required. Therefore, A is correct. B is incorrect because amalgam is not a root-canal obturating material. C describes an interim restoration, whereas the Nayyar technique provides a definitive core foundation. D is misleading: preservation of tooth structure and subsequent cuspal protection are important, but the technique is not designed to reinforce the root itself. E is wrong because the restoration is placed directly; it is not a pattern for a cast post-and-core.
Reference: Margelos J, Tripodakis AP. Amalgam build-up for endodontically treated posterior teeth with intraradicular extension. Hell Stomatol Chron. 1990. https://pubmed.ncbi.nlm.nih.gov/2130042/