Oral Surgery · patient case question
What will be the greatest cause for concern in performing the extractions?
Patient case: Metformin, interferons, zoledronate and lisinopril — three extractions
Scenario: Patient taking METFORMIN, INTERFERONS, ZOLEDRONATE and LISINOPRIL. HbA1c = 8; BP = 132/92. You need to do THREE EXTRACTIONS.
Show answer and explanation
Correct answer: D. Bisphosphonate (zoledronate) use
- A. 132/92 is stage 1 hypertension — treatment can proceed, with monitoring. It is not the dominant concern here.
- B. HbA1c of 8 indicates suboptimal but not extreme control; healing may be somewhat impaired, but this does not outweigh IV bisphosphonate exposure.
- C. Dry socket is a real but self-limiting complication managed with irrigation and a sedative dressing; it does not carry the morbidity of osteonecrosis.
- D. Correct. ZOLEDRONATE is a high-potency INTRAVENOUS nitrogen-containing bisphosphonate. IV administration carries a far higher risk of MRONJ than oral bisphosphonates, and extraction is the single greatest local risk factor. This concern outweighs the other findings.
Note: Zoledronate is used both for osteoporosis (annual low dose) and for METASTATIC BONE DISEASE / myeloma (frequent high dose). Interferon in the medication list hints at an oncologic or MS indication — worth asking why the drug was prescribed, since it changes the MRONJ risk category.