Single extraction in a patient on warfarin and aspirin with an INR above range

Do not agree. The decision here is a risk-balance, not a rule.

• Warfarin is being taken for atrial fibrillation with a recent coronary stent. An interrupted or erratic anticoagulant course in this setting risks thromboembolism or stent thrombosis, which is a far more serious harm than post-extraction bleeding, which is usually controllable locally.
• Any alteration to anticoagulation is a prescribing decision for his GP or cardiologist, not the dentist. Self-ceasing is especially unsafe because there is no monitoring over the weekend.
• Aspirin 100 mg for secondary prevention should also be continued; stopping it confers no useful haemostatic benefit for a single simple extraction.
• His INR of 3.2 is above the range at which a simple extraction is generally regarded as safe (usually accepted at INR ≤3.0, with some services allowing up to 3.5 for a single simple extraction). The appropriate response is to defer the elective procedure, arrange a repeat INR, and communicate with his GP on Monday about whether the dose needs review.
• The localised buccal swelling without systemic features can be managed in the interim with analgesia and, if there is active infection, appropriate antibiotics and review; there is no airway or fascial space threat requiring emergency surgery tonight.

Pre-operative

• Confirm the current INR result is recent (within 24-48 hours) and documented.
• Schedule early in the day and early in the week so bleeding problems can be managed while help is available.
• Obtain valid consent that includes the bleeding risk and the plan if it occurs.

Operative

• Use an aspirating syringe. Adrenaline-containing local anaesthetic is safe and useful; vasoconstriction aids haemostasis.
• Prefer infiltration or intraligamentary anaesthesia for an upper premolar. Avoid an inferior alveolar block where possible in an anticoagulated patient because of the risk of a pterygomandibular space haematoma that can compromise the airway - relevant if a posterior mandibular tooth is ever involved.
• Atraumatic technique: periotome, controlled force, avoid tearing the soft tissue, curette the socket gently and suture.
• Place a haemostatic agent (oxidised cellulose or collagen sponge) and a pressure pack for 20-30 minutes.

Post-operative

• Tranexamic acid 4.8% mouthwash, 10 mL for 2 minutes, four times daily for 2 days, not swallowed.
• Paracetamol, not NSAIDs, for pain.
• Written instructions: no rinsing or hot drinks on day one, no smoking or alcohol, no strenuous exercise, soft diet, and a contact number with clear advice to seek help if bleeding recurs.

The settling of the swelling changes the urgency, not the underlying diagnosis. The tooth still has a periapical radiolucency and attachment loss - it is a chronically infected, non-vital tooth, not a healed one.

Key reasoning points:

• Removing the acute component removed the immediate risk, so the procedure is now elective and can be timed to coincide with an in-range INR and GP liaison. That is the safer sequence.
• Waiting does not make the extraction harder in a harmful way for a single premolar with a buccal pocket, but prolonged delay allows further bone loss and possible loss of the buccal plate, which could affect any future replacement.
• A reasonable timeframe is within a few weeks, once the INR is confirmed in range; indefinite deferral is not acceptable.
• Discuss with the patient the possibility of restoring the tooth instead if the periapical lesion is treatable, since the decision to extract should be based on restorability and periodontal support, not only on his anticoagulant status.
• Document the conversation, the INR value relied upon, and the GP communication - this is the defensible standard if bleeding later occurs.