Over-reduction / unnecessary loss of tooth structure
What it is
Removing more enamel/dentin than needed during crown/onlay/veneer preparation (over-reduction occlusally, axially, or at the margin), creating an overly short/over-tapered prep, reduced remaining dentin thickness, and higher biologic risk for the pulp.
Why it happens
• No reduction guide (prep done "by eye" → easy to overcut line angles, cusps, and cervical third) • Chasing "perfect clearance" everywhere instead of uniform, material-appropriate reduction (especially with ceramics) • Over-tapering while trying to create a single path of insertion, which often comes with extra axial reduction and loss of height • Ignoring pulp biology: as remaining dentin thickness decreases, pulpal irritation/inflammation risk increases
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.