Radiology · patient case question
The mixed radiolucent-radiopaque lesion at the apices of the mandibular anteriors, with all teeth testing VITAL, is best managed by:
Patient case: Films for a Patient Not Seen in Ten Years
Patient: 48-year-old male
Chief Complaint: “I want a full check-up. I know it's been a while.”
Background: Last dental visit approximately ten years ago. No current symptoms. Reports his gums bleed when he brushes.
Medications: None
Vital Signs: BP 128/80 mmHg · HR 76 bpm · RR 16 · T 98.4°F
Findings: Generalized 5–7 mm pockets with bleeding on probing and visible recession. Several teeth are slightly mobile. On imaging: a horizontally impacted #17 whose crown abuts the distal root of #18, which shows a concave defect at the contact point; a well-defined mixed radiolucent-radiopaque lesion at the apices of the mandibular anteriors, which all test VITAL; and a radiopaque structure superimposed over the mandible on both the panoramic and lateral cephalometric films.
Show answer and explanation
Correct answer: D. No treatment — periodic radiographic review only
- A. Root canal treatment on VITAL teeth is unnecessary and harmful. This is the classic trap: mistaking the radiolucent stage for periapical inflammation and endodontically treating healthy teeth. PULP TESTING is what prevents that error.
- B. Apicoectomy is likewise contraindicated, and for the same reasons.
- C. Surgical intervention is contraindicated. The dysplastic bone is hypovascular and heals poorly — biopsy or enucleation risks infection and a chronic non-healing defect.
- D. CORRECT. This is PERIAPICAL CEMENTO-OSSEOUS DYSPLASIA, and the critical finding is that the teeth are VITAL. It is a reactive, self-limiting fibro-osseous lesion of the periodontal ligament that passes through three stages — early osteolytic (radiolucent), intermediate cementoblastic (mixed), and mature (radiopaque with a thin radiolucent rim). It requires NO TREATMENT. Periodic radiographic observation is all that is needed.
Note: COD is most common in middle-aged Black women. The florid variant is multiquadrant and can be extensive; the same rule applies — leave it alone. Avoid extractions and implants in affected bone where possible.