Rubber Dam Isolation — ORE Part 1 MCQ
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Correct answer: A — To isolate the tooth and protect the patient from contamination or aspiration
Explanation lettering: E = shown as B · D = shown as C · B = shown as D · C = shown as E
The correct answer is A. In UK endodontic practice, rubber dam is used to isolate the tooth from saliva and oral bacteria, creating a controlled, dry field and reducing the risk of contamination of the root canal system. It is also an essential patient-safety measure because it helps prevent ingestion or aspiration of files, materials and irrigants. B is incorrect because rubber dam does not prevent fracture of a weakened tooth; definitive cuspal protection may be required after treatment. C is incorrect because local anaesthesia is assessed and provided independently. D is not its purpose: application may initially add time. E is too limited, as patient comfort is not the principal indication.
Reference: British Endodontic Society, Guide to Good Endodontic Practice, 2022. https://www.rcseng.ac.uk/-/media/FDS/The-British-Endodontic-Society-guide-to-Good-Endodontic-Practice.pdf