Third Molar
The most posteriorly positioned permanent molar, commonly referred to colloquially as the wisdom tooth, and frequently the subject of oral surgical intervention.
Full Definition
The third molar is the eighth tooth from the midline in each dental quadrant, erupting last among the permanent dentition, typically between ages 17 and 25. Third molars are the most commonly impacted teeth and are a primary focus of dentoalveolar surgery. In formal clinical and editorial contexts, the term 'third molar' is preferred over 'wisdom tooth', which is colloquial. When referring to a specific tooth, the universal numbering system (e.g., tooth 38, or LL8) or Palmer notation should be used and applied consistently throughout a document. Editors should ensure that quadrant terminology (upper/lower, left/right) is consistent and unambiguous.
Usage
Usage note: Use 'third molar' in formal clinical and regulatory documents; 'wisdom tooth' is acceptable in patient-facing materials. Always specify quadrant (e.g., lower-left third molar) to avoid ambiguity. Apply a consistent tooth notation system throughout the document.
In Context
- "The patient was referred for surgical removal of the horizontally impacted lower-right third molar under local anaesthesia." — GP referral letter
- "Postoperative care instructions following third molar extraction should be reviewed and signed by the patient prior to discharge." — Pre-operative administration checklist