PDL
Pronunciation: pee-dee-el
Also written as: PDL — Periodontal Ligament
Abbreviation for Periodontal Ligament, the connective tissue structure attaching the tooth root to the alveolar bone, frequently referenced in endodontic assessment of periapical health.
Full Definition
PDL is the standard abbreviation for the periodontal ligament, the fibrous connective tissue occupying the space between the root cementum and the alveolar bone socket. In endodontics, radiographic assessment of the PDL space is central to diagnosing periapical pathology: widening of the PDL space suggests inflammatory changes, and its obliteration may indicate ankylosis or replacement resorption following dental trauma. Authors should define 'PDL' on first use in any manuscript. Editors must distinguish references to the PDL space (the radiolucent line on a radiograph) from the PDL as a tissue entity.
Usage
Usage note: Define on first use. All capitals, no periods. 'Periodontal membrane' is an older synonym found in classic texts and should be updated to 'periodontal ligament' in modern editorial work unless quoting historical sources.
In Context
- "Periapical radiography revealed uniform widening of the PDL space around the apex of the mandibular left first molar." — Radiographic diagnostic report
- "Authors should clarify whether PDL refers to the tissue or the radiographic PDL space, as the distinction affects clinical interpretation." — Manuscript editorial note