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Oral surgery during therapy with anticoagulants—a systematic review

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Abstract

Objectives

Oral anticoagulation therapy (OAT) with vitamin K inhibitors protects the patients from thromboembolic events. It may however lead to excessive hemorrhage during and after an oral surgery procedure. The aim of this systematic review was to evaluate the justifications to reduce, withdraw, or alter OATs prior to minor oral surgery procedures to manage bleeding events.

Materials and methods

A systematic MEDLINE search was conducted for clinical studies in English or German language from 1994 to 2014 comparing patients treated with OAT, without OAT, as well as patients with altered OAT for oral surgery purposes. Relevant outcome parameters were: postoperative local hemostasis, bleeding episodes, occurrence of thromboembolic events, and other complications due to the anticoagulation medication. A hand search for references cited in the identified publications completed the review.

Results

After screening of 1755 abstracts, 16 clinical studies were identified according to the selection criteria. Due to the heterogeneity of the obtained data, aggregation and synthesis were not possible. There was no significant difference in bleeding events comparing patients under continued OAT to those with reduced, altered, and/or discontinued OAT medications. Minor bleeding events in the test and control groups were successfully stopped with local measures. However, no superiority of a single hemostatic measure could be identified. Neither the international normalized ratio (INR), within the therapeutic range (2–4), nor the extent of the minor oral surgery procedure had an influence on postoperative bleeding episodes.

Discussion

There is strong evidence that OAT patients undergoing minor oral surgery should not discontinue their medication in order to prevent thromboembolic complications.

Clinical relevance

Nonetheless, INR should be less than 4, local hemostatic measures are of high importance and patients need to be instructed and closely monitored as minor bleedings might occur more often in OAT patients.

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The authors have no conflicts of interest in regard of this publication.

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Authors and Affiliations

  1. Department of Oral, Maxillofacial and Plastic Surgery, University Medical Centre of Rostock, Schillingallee, 35, 18057, Rostock, Germany

    Peer W. Kämmerer, Bernhard Frerich & Jan Liese

  2. Department of Oral, Maxillofacial and Plastic Surgery, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany

    Eik Schiegnitz & Bilal Al-Nawas

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  1. Peer W. Kämmerer
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  2. Bernhard Frerich
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Correspondence to Peer W. Kämmerer.

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Kämmerer, P.W., Frerich, B., Liese, J. et al. Oral surgery during therapy with anticoagulants—a systematic review. Clin Oral Invest 19, 171–180 (2015). https://doi.org/10.1007/s00784-014-1366-3

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