Inadequate access cavity (missed anatomy / straight-line access not achieved)
What it is
Preparing an access cavity that doesn't fully unroof the chamber, doesn't expose the pulpal floor anatomy, or doesn't provide straight-line entry to canal orifices — so canals are missed, files are deflected, and instrumentation becomes error-prone.
Why it happens
• Fear of "removing too much tooth" → access left too small to see the canal map • Rushing emergency cases; starting to file before the chamber is properly exposed • Limited visibility (no magnification/illumination) • Not removing restorative material/caries that blocks the ideal path • Misjudging tooth angulation/anatomy (especially maxillary molars, mandibular incisors, calcified teeth)
The full clinical mistake entry includes
- How to avoid it — the prevention protocol
- The clinical tip experienced clinicians use
- The documented reference behind the mistake
More clinical mistakes
Dentalverse is an educational resource for dental students and dentists. This page is a study reference — it is not medical advice and does not replace clinical judgment. Always follow your institution's protocols and your supervisor's guidance.