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J Am Dent Assoc, Vol 134, No 11, 1492-1497. © 2003 American Dental Association

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JADA Continuing Education

Background. There is a widespread belief among dental practitioners and physicians that oral anticoagulation therapy in which patients receive drugs such as warfarin sodium must be discontinued before dental treatment to prevent serious hemorrhagic complications, especially during and after surgical procedures.

Overview. The authors examine the scientific basis for properly managing the dosage of anticoagulants for dental patients who are receiving anticoagulation therapy. The authors review the appropriate laboratory test values to which dentists should refer when evaluating for dental treatment patients who are receiving anticoagulation therapy. The authors also review clinical studies, published within the past five years, that focus on the frequency and degree of hemorrhagic and related complications among dental patients who are receiving anticoagulation therapy orally to prevent thromboembolic events.

Conclusions and Clinical Implications. The scientific literature does not support routine discontinuation of oral anticoagulation therapy for dental patients. Use of warfarin sodium as it relates to dental or oral surgical procedures has been well-studied. Some dental studies of antiplatelet therapy are consistent with the findings in warfarin sodium studies. Dental therapy for patients with medical conditions requiring anticoagulation or antiplatelet therapy must provide for potential excess bleeding. Routine discontinuation of these drugs before dental care, however, can place these patients at unnecessary medical risk. The coagulation status—based on the International Normalized Ratio—of patients who are taking these medications must be evaluated before invasive dental procedures are performed. Any changes in anticoagulant therapy must be undertaken in collaboration with the patient’s prescribing physician.

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