Violating vital structures (IAN/mental foramen/sinus/nasal floor)
What it is
Damaging the inferior alveolar nerve (IAN), mental nerve, penetrating into the maxillary sinus without planned sinus augmentation, or perforating the nasal floor during implant placement. Results in permanent or temporary paresthesia/anesthesia, sinusitis, or oroantral communication.
Why it happens
• Inadequate pre-operative CBCT assessment or measurement errors • Not identifying the anterior loop of the mental nerve (extends 1-7mm anterior to the mental foramen) • Underestimating sinus pneumatization in the posterior maxilla • Drill or implant extending beyond the planned depth • Failure to use depth stops on drills • Ignoring lingual concavities in the posterior mandible (risk of lingual plate perforation and sublingual hemorrhage)
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.