Pulp Canal Obliteration
Progressive narrowing or complete occlusion of the root canal lumen by the deposition of tertiary or sclerotic dentin, often following dental trauma.
Full Definition
Pulp canal obliteration (PCO) is characterised by accelerated deposition of hard tissue within the root canal space, leading to partial or complete loss of the visible canal on radiographs. It is most frequently encountered following luxation injuries to immature permanent teeth and is considered a delayed pulpal response to trauma. Despite the radiographic absence of a canal, a microscopic pulp remnant often persists, and endodontic treatment remains technically feasible though demanding. Editors should note that 'calcified canal' is a common lay synonym but is not preferred in specialist publications. PCO is also abbreviated to 'canal calcification' in some older literature, creating potential confusion for editors.
Usage
Usage note: Preferred over 'calcified canal' in specialist literature. The abbreviation PCO is acceptable after first-use definition. Three words; no hyphenation.
In Context
- "Pulp canal obliteration was observed radiographically in the maxillary central incisor three years after a subluxation injury." — Trauma follow-up report
- "Authors should use 'pulp canal obliteration' as the preferred term rather than the colloquial 'calcified canal' in peer-reviewed submissions." — Editorial guideline