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J Am Dent Assoc, Vol 131, No 1, 77-81.
© 2000 American Dental Association |  |
DENTISTRY AND MEDICINE |
RECEIVING ANTICOAGULANT THERAPY
Background. Continuous anticoagulant therapy with warfarin is administered to prevent a variety of medical complications, including thromboembolisms and stroke. When patients receiving continuous anticoagulant therapy are scheduled for dental surgery, a decision must be made whether to continue or interrupt the anticoagulant therapy.
Methods. The author reviewed the literature, focusing on dental surgery in patients receiving continuous anticoagulant therapy and in patients whose anticoagulant therapy was withdrawn before they underwent dental procedures.
Results. Of more than 950 patients receiving continuous anticoagulant therapy (including many whose anticoagulation levels were well above currently recommended therapeutic levels) who underwent more than 2,400 surgical procedures, only 12 (< 1.3 percent) required more than local measures to control hemorrhage. Only three of these patients (< 0.31 percent) had anticoagulation levels within or below currently recommended therapeutic levels. Of 526 patients who experienced 575 interruptions of continuous anticoagulant therapy, five (0.95 percent) suffered serious embolic complications; four of these patients died.
Conclusions. Serious embolic complications, including death, were three times more likely to occur in patients whose anticoagulant therapy was interrupted than were bleeding complications in patients whose anticoagulant therapy was continued (and whose anticoagulation levels were within or below therapeutic levels). Interrupting therapeutic levels of continuous anticoagulation for dental surgery is not based on scientific fact, but seems to be based on its own mythology.
Clinical Implications. Dentists should recommend that therapeutic levels of anticoagulation be continued for patients undergoing dental surgery. Practitioners should consult with the patient’s physician if necessary to determine his or her level of anticoagulation before performing dental surgery.
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