How should dental fitness be assessed for a patient with a coronary stent who is on dual antiplatelet therapy (aspirin and clopidogrel) and other cardiac medications?

How to Give Fitness for Dental Procedure in Cardiac Patients with Stents on Antiplatelet Therapy

For most dental procedures in stented patients on dual antiplatelet therapy (DAPT), maintain aspirin throughout and continue clopidogrel for minor bleeding risk procedures; only stop clopidogrel 3-5 days before major bleeding risk procedures if absolutely necessary. 1

Risk Stratification Framework

Step 1: Assess Stent Thrombosis Risk

High thrombosis risk (DO NOT stop DAPT):

• Stent placed <6 months ago (drug-eluting stent) or <1 month ago (bare metal stent) 1, 2
• Recent acute coronary syndrome (<6 weeks) 3
• History of stent thrombosis
• Multiple stents, bifurcation lesions, or left main stenting

Moderate thrombosis risk:

• Drug-eluting stent placed 6-12 months ago
• Bare metal stent placed >1 month ago

Lower thrombosis risk:

• Any stent placed >12 months ago with stable course 4, 5

Step 2: Classify Dental Procedure Bleeding Risk

Minor bleeding risk (proceed on full DAPT):

• Simple extractions (1-3 teeth)
• Dental cleaning/scaling
• Simple fillings
• Root canal therapy
• Minor periodontal procedures 6

Intermediate bleeding risk:

• Multiple extractions (>3 teeth)
• Flap procedures
• Surgical extractions

Major bleeding risk:

• Extensive oral surgery
• Multiple surgical sites
• Procedures where even minor bleeding is unacceptable

Management Algorithm

For Minor Bleeding Risk Procedures (Most Common)

Continue both aspirin AND clopidogrel 1, 6

• Use local hemostatic measures:
  • Tranexamic acid mouthwash (10 mL of 5% solution, 4 times daily for 2 days post-procedure)
  • Local pressure
  • Absorbable gelatin sponges
  • Suturing when possible

For Intermediate/Major Bleeding Risk Procedures

If stent <6 months old (high thrombosis risk):

• POSTPONE elective procedure until 6-12 months post-stent 3, 1
• If urgent/cannot postpone:
  • Maintain aspirin (75-100 mg daily) 1
  • Stop clopidogrel 3 days before procedure (NOT 5 days as previously recommended - newer evidence supports shorter discontinuation for ticagrelor, and this can be extrapolated to lower-risk non-cardiac procedures) 1
  • Resume clopidogrel within 24-48 hours post-procedure 3
  • Consider 300-600 mg loading dose when restarting 3

If stent >6 months old (moderate thrombosis risk):

• Maintain aspirin throughout 1
• Stop clopidogrel 5 days before procedure 3, 1
• Resume clopidogrel as soon as hemostasis achieved (ideally within 48 hours) 1

If stent >12 months old (lower thrombosis risk):

• Maintain aspirin throughout 1
• May stop clopidogrel 5 days before if bleeding risk truly outweighs ischemic risk
• Many patients at this stage may be on aspirin monotherapy already 4, 5

Critical Timing Considerations

Minimum DAPT duration before ANY elective procedure:

• Bare metal stent: 1 month minimum, ideally 3 months 1, 2
• Drug-eluting stent: 6 months minimum, ideally 12 months 1, 4
• Post-acute coronary syndrome: 12 months regardless of stent type 4, 5

The 2017 ESC guidelines represent the most current evidence and recommend that elective surgery requiring P2Y12 inhibitor discontinuation should be considered after 1 month, irrespective of stent type, IF aspirin can be maintained throughout 1. However, this applies to situations where aspirin continuation provides adequate protection - for dental procedures, this is generally acceptable.

Multidisciplinary Consultation Requirements

Mandatory cardiology consultation before procedure if:

• Stent placed <6 months ago
• Recent MI (<6 weeks)
• History of stent thrombosis
• Complex PCI (left main, bifurcation, multiple vessels)
• Patient requires discontinuation of both antiplatelet agents 1

Document in writing:

• Cardiologist's assessment of thrombosis risk
• Agreed antiplatelet management plan
• Timeline for drug discontinuation and resumption
• Emergency contact information 3

Common Pitfalls to Avoid

1. Never stop both aspirin and clopidogrel simultaneously unless life-threatening bleeding occurs 1

2. Do not use the outdated 7-day discontinuation period for clopidogrel - current evidence supports 3-5 days maximum 1

3. Avoid NSAIDs perioperatively in patients on DAPT due to additive bleeding risk and potential cardiovascular harm 5

4. Do not assume all dental procedures require stopping antiplatelet therapy - most minor procedures can proceed safely on full DAPT with local hemostatic measures 6

5. Beware of proton pump inhibitor interactions - omeprazole and esomeprazole reduce clopidogrel efficacy; use pantoprazole or lansoprazole if PPI needed 7

Fitness Certification Template

Declare patient FIT for dental procedure if:

• Appropriate waiting period post-stent has elapsed for procedure type
• Antiplatelet management plan documented and agreed with cardiology
• Local hemostatic measures available
• Patient understands bleeding/thrombosis risks
• Emergency protocols in place

Declare patient UNFIT (postpone) if:

• Stent placed <1 month ago (any elective procedure requiring DAPT modification)
• Stent placed <6 months ago (procedure requiring clopidogrel discontinuation)
• Recent ACS <6 weeks
• Unstable cardiac symptoms
• Unable to maintain at least aspirin throughout procedure

The key principle is that aspirin should almost never be stopped perioperatively 1, and for most dental procedures, both agents can be safely continued with appropriate local hemostatic measures 6.