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Technical
IVT
coronectomy
Surgical technique involving removal of the crown portion of an impacted tooth while leaving the roots in situ.
Full Definition
Coronectomy is a nerve preservation technique used primarily for mandibular third molars that are in close proximity to the inferior alveolar nerve. The procedure involves sectioning and removing only the coronal portion of the tooth at the cemento-enamel junction, while deliberately leaving the roots undisturbed to avoid nerve injury. The retained root fragments typically become covered by bone and remain asymptomatic, though long-term monitoring is recommended to ensure no pathological changes occur.
Usage
Usage note: Distinguish from 'decoronation' which is used in different clinical contexts.
In Context
- "Coronectomy was elected due to the high risk of inferior alveolar nerve damage with complete extraction." — Operative report
- "Post-coronectomy radiographs showed appropriate positioning of the retained root fragments." — Follow-up note
Also known as
partial tooth removal
intentional root retention
Contrasted with
complete extraction
surgical extraction
Don't confuse with
crown removal
decoronation
root tip removal