A periapical radiolucency is present on an ASYMPTOMATIC tooth. On access, the canal is found to be heavily calcified and cannot be negotiated. What is the most appropriate management?

Correct answer: B. Refer to an endodontist

• A. Observing a tooth with a known apical radiolucency and an uninstrumented, infected canal system allows the lesion to progress and risks acute exacerbation. Asymptomatic apical periodontitis is still a disease diagnosis.
• B. CORRECT. A periapical radiolucency means there IS disease requiring treatment — the absence of symptoms does not make it acceptable to leave. A calcified canal that cannot be negotiated with conventional instrumentation calls for the equipment and expertise of a specialist: the DENTAL OPERATING MICROSCOPE, ultrasonic tips for troughing, CBCT for three-dimensional localisation of the canal, and the option of apical surgery if an orthograde approach fails. REFERRAL is the appropriate standard of care.
• C. Extraction discards a restorable tooth before a reasonable attempt at retention has been made. It becomes appropriate only after specialist orthograde and surgical options have been considered and declined or have failed.
• D. EDTA (as a chelating paste or solution) IS a legitimate adjunct for softening calcified dentin and can be used while attempting negotiation — but it is a technique within treatment, not a treatment plan in itself, and using it indefinitely without progress leaves the disease untreated.

Note: Pulp canal obliteration is a common late sequela of dental TRAUMA and of ageing. Note that obliteration alone, with no radiolucency and no symptoms, does NOT require intervention — the trigger for treatment here is the periapical lesion.