Oral Surgery · patient case question
What is the most likely diagnosis?
Patient case: Exposed Bone After an Extraction
Patient: 68-year-old male
Chief Complaint: “The bone is showing where they pulled my tooth, and it smells bad.”
Background: Metastatic prostate carcinoma with bone metastases, on monthly intravenous zoledronic acid for 3 years. Tooth #30 extracted 10 weeks ago at another office. No history of head and neck radiation. Non-smoker.
Medications: Zoledronic acid IV monthly · Leuprolide · Calcium and vitamin D
Vital Signs: BP 132/80 mmHg · HR 76 bpm · RR 16 · T 99.1°F
Findings: A 15 mm area of exposed, necrotic-appearing bone at the #30 site with purulent drainage and surrounding erythema. No extraoral fistula. Teeth #29 and #31 are present, sound, and periodontally stable. The patient asks about replacing #30 with an implant once the site heals.
Show answer and explanation
Correct answer: B. Medication-related osteonecrosis of the jaw
- A. Incorrect. Metastatic disease to the mandible typically presents as an ill-defined destructive radiolucency, sometimes with paresthesia of the lower lip. It does not present as chronically exposed bone at an extraction site.
- B. Correct. Exposed necrotic bone persisting beyond 8 weeks, in a patient on an antiresorptive agent, with no history of radiation to the jaws, meets the diagnostic definition. Purulence and erythema without extraoral fistula place this at stage 2.
- C. Incorrect. Osteomyelitis arises from an odontogenic infection spreading into marrow spaces, with characteristic radiographic sequestra and periosteal reaction. The antiresorptive history and the classic timeline point elsewhere.
- D. Incorrect. Osteoradionecrosis requires prior therapeutic radiation to the head and neck. His radiation, if any, was directed at the pelvis, and the stem explicitly excludes head and neck radiation.
Note: Diagnostic triad: current or previous antiresorptive or antiangiogenic therapy, exposed bone or a probeable fistula persisting more than 8 weeks, and no history of radiation to the jaws.