Impacted Third Molar Close to the Inferior Alveolar Canal in a Patient on Apixaban
A 29-year-old man is referred for removal of the mandibular left third molar (38). He has had two episodes of pericoronitis in six months, the last requiring antibiotics. He takes apixaban 5 mg twice daily after a pulmonary embolism and has well-controlled hypertension; his renal function is normal. His last dose was 14 hours ago. An orthopantomogram shows a mesioangular impaction, Pell and Gregory class IIB, with the roots overlapping the mandibular canal. A cone-beam CT shows 1.2 mm between the root apices and the canal, loss of the lingual cortical plate, and a bifid root. Mouth opening is 42 mm. He is anxious and asks to be asleep for the procedure. The nearest hospital-based oral surgery service is 45 minutes away, and he has no escort for 24 hours after any sedation.
1. How do the panoramic and CBCT findings influence the risk of inferior alveolar nerve injury and your choice between extraction and coronectomy?
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Panoramic findings: a mesioangular class IIB impaction with roots overlapping the canal already signals a close relationship, but the panoramic image cannot show the buccolingual relationship or cortical integrity.
CBCT findings: 1.2 mm between the apices and the canal, loss of the lingual cortical plate, and a bifid root increase the risk of inferior alveolar nerve exposure or injury during elevation. Lingual plate loss also matters for lingual nerve risk and flap design. I would use the CBCT to plan a coronectomy versus extraction discussion.
Coronectomy: reasonable if the crown can be sectioned 3–4 mm below the buccal crest, the roots are vital and non-infected, and there is no active pericoronitis at the time of surgery. It reduces inferior alveolar nerve injury risk but leaves roots that may migrate or become infected; follow-up is required. Extraction is preferred if the tooth is infected, roots are mobile, or the patient cannot attend follow-up. Because he has had two recent pericoronitis episodes, I would ensure infection has resolved before either procedure and would involve an oral surgeon experienced with nerve proximity.
2. How would you manage apixaban around this surgical extraction, and what local measures would you plan?
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Apixaban: this is a direct oral anticoagulant. I would not stop it on my own. I would check renal function (reported normal), confirm the indication and prescriber, and follow a written local protocol. For a low-risk extraction, many protocols continue the drug; for a higher-risk surgical extraction, the morning dose may be omitted on the day, with the next dose resumed once hemostasis is secure. The last dose was 14 hours ago, so timing matters. I would liaise with his physician before changing anything.
Local measures: atraumatic surgery, primary closure with sutures, pressure packs, oxidized cellulose or gelatin sponge, and tranexamic acid mouthwash if appropriate. I would give written post-operative instructions, an emergency contact, and advise avoiding NSAIDs if there is a bleeding risk; paracetamol is preferred. I would not prescribe antibiotics routinely for prophylaxis in a healthy patient, but would treat active infection.
Documentation: record the anticoagulant, last dose, renal function, physician advice, local measures, and bleeding instructions.
3. What setting and anesthetic approach are appropriate given his anxiety, lack of escort, and distance from hospital care?
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Setting: he is anxious and requests sedation, but he has no escort for 24 hours and lives 45 minutes from hospital care. In an outpatient clinic, sedation without a responsible escort is unsafe and would conflict with discharge criteria; I would not proceed with sedation on that basis.
Options: (1) local anesthesia with structured anxiety management, if he accepts and can cooperate; this may be feasible for a surgical extraction but does not remove the need for a backup plan. (2) Referral to a hospital oral and maxillofacial unit for treatment under sedation or general anesthesia, with pre-operative assessment and an escort arranged. (3) If he declines both, document the discussion and offer a review rather than proceeding under pressure.
Recommendation: given the inferior alveolar nerve proximity, prior pericoronitis, and anticoagulant, hospital-based specialist care is the safer setting. I would explain the reasons, arrange referral, and ensure he understands that driving himself home after sedation is not acceptable. His anxiety is a legitimate clinical factor, not an inconvenience.