Endodontic diagnosis combines history, examination, comparison teeth, pulp sensibility findings, periapical tests and appropriate imaging. The pulpal and apical diagnoses should be recorded separately because they describe different tissues.
Contents
A reproducible diagnostic sequence
- Clarify onset, duration, triggers, spontaneity, localisation and analgesic response.
- Review caries, restorations, cracks, trauma, periodontal findings and previous care.
- Perform palpation, percussion, biting and periodontal probing when indicated.
- Test the suspected tooth and suitable controls; repeat inconsistent results.
- Select imaging for the clinical question and reserve CBCT for justified cases.
- Synthesise all findings; document uncertainty and review or refer when necessary.
Clinical interpretation table
| Pattern | Possible interpretation | Caution |
|---|---|---|
| Response comparable with controls | Normal pulp | Sensibility does not measure blood flow |
| Brief exaggerated response | Reversible pulpitis may be considered | Correlate with history |
| Spontaneous or lingering thermal pain | Symptomatic irreversible pulpitis may be considered | Pain is not histology |
| No response on repeated valid testing | Pulp necrosis may be considered | Exclude technique error, calcification and trauma |
| Pain on percussion or palpation | Symptomatic apical periodontitis may be considered | Exclude occlusal and non-odontogenic causes |
| Apical radiolucency without symptoms | Asymptomatic apical periodontitis may be considered | Correlate with pulp status |
Avoiding diagnostic errors
Cold and electric tests assess neural response, not vascularity. False responses may follow trauma or occur with immature teeth, calcification, extensive restorations or poor technique. Radiographic disease may lag behind biology, while non-endodontic lesions can mimic apical disease. Do not begin irreversible care until findings are coherent.
Related DentalReach reading
- cracked tooth diagnostic guidance
- CBCT selection and radiation safety
- comprehensive treatment planning
Frequently asked questions
Is a negative cold test proof of necrosis?
No. Repeat testing with controls and consider trauma, calcification, restorations and technique.
Should every endodontic case receive CBCT?
No. It should answer a defined question when conventional imaging is insufficient and may alter care.
What if symptoms and tests disagree?
Recheck the history and technique, consider cracks and non-odontogenic pain, document uncertainty and review or refer.
References
Pulpal and apical diagnosis determines whether treatment, monitoring, vital pulp therapy or referral is appropriate; use the root canal diagnosis and treatment pathway.
For diagnosis, prognosis and retreatment context, see Root Canal Failure and Endodontic Retreatment Guide.
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