Delayed bleeding after implant surgery in patients taking novel oral anticoagulants: a case report

Bleeding Disorders and Dental Implants: Review and Clinical Indications

BACKGROUND

Bleeding disorders can be divided into three categories: congenital coagulation disorders (CCDs), antiplatelet-induced bleeding disorders (APBDs) and anticoagulant-induced bleeding disorders (ACBDs). Implant placement can be challenging in these kinds of patients. The aim of this study is to provide evidence on implant surgery in patients with bleeding disorders and to generate some practical recommendations for clinicians.

MATERIAL AND METHODS

Pubmed/MEDLINE, Scopus, Web of Science and Cochrane Library databases were screened. The latest search was performed in July 2022. Case reports, case series, cohort studies, cross-sectional studies, case control studies, reviews, consensus reports, surveys and animal studies were included in the analysis.

RESULTS

Seventeen articles on CCDs were found, fourteen on APBDs and twenty-six on ACBDs. Most of these articles were case reports or case series. Patients with CCDs can be treated after the infusion of the missing coagulation factor. Patients with APBDs can be treated without withdrawing the therapy. Patients with ACBDs should be treated depending on the anticoagulative medication.

CONCLUSION

Despite the low level of evidence, dental implants can be safely placed in patients with bleeding disorders. However, careful preoperative evaluation and the adoption of local and post-operative bleeding control measures are mandatory.

Assessment of Bleeding in Patients on Antiplatelets Undergoing Dental Implants

Introduction

Antiplatelet drugs are used for the secondary prevention of cardiac and cerebrovascular diseases. Clopidogrel and Aspirin are the most commonly prescribed drugs for these patients. Physicians and dentists have to weigh bleeding risks versus thrombotic risks in interrupting antiplatelet regimen. The balance of these risks for an individual patient is the primary consideration in management of dental patients who are taking antiplatelet drugs and require dental implants. The study was undertaken to assess the risk of bleeding in patients on single and dual antiplatelets undergoing dental implants.

Materials and method

65 patients were assessed for bleeding after placement of dental implants. They were divided into 2 groups: group I included 48 patients on single antiplatelets (Aspirin) and group II included 17 patients on dual antiplatelets (Aspirin and Clopidogrel) based upon the timing of coronary intervention. Bleeding was evaluated intra-operatively and post-operatively.

Results

Significant difference in bleeding was noted between group I and group II based on the Visual Analog Scale (VAS) for bleeding severity after implant placement both intra-operatively (P = 0.000) and post-operatively (P = 0.004) within 24 h. However, post-operative complication after 24 h was non-significant (P = 0.277).

Conclusion

Dental implants can be safely placed in patients on single antiplatelet drugs without discontinuing them. In patients on dual antiplatelets, risk of bleeding is mild to moderate if the drugs are continued. Consultation with treating cardiologist is a must before any kind of dental invasive surgery in patients on antiplatelets.

Do Antiplatelet Drugs Increase the Risk of Bleeding After Dental Implant Surgery? A Case-and-Crossover Study

PURPOSE

Cessation versus continuation of antiplatelet drugs in patients undergoing dental implant surgery is a controversial issue. The present study evaluated postoperative bleeding during and after dental implant surgery in patients taking aspirin (ASA) or clopidogrel.

MATERIAL AND METHODS

The present study is a case-and-crossover study. Patients who were using antiplatelet drugs and receiving 2 bilateral dental implants in the posterior region of the mandible were studied. During session 1, dental implants were placed without stopping the intake of antiplatelet drugs. During session 2, antiplatelet drugs were stopped for 5 days. In group 1, platelet activity was measured by an assay based on flow cytometry and represented the platelet reactivity index. In group 2, platelet function analysis was used to monitor the antiplatelet effect of ASA. Bleeding severity was assessed using a visual analog scale for 72 hours after dental implant placement during sessions 1 and 2. Use of antiplatelet drugs was the predictive factor of the study and bleeding severity and platelet function were the outcomes of the study.

RESULTS

Twenty-two patients composed group 1 (clopidogrel 75 mg) and 20 composed group 2 (ASA 80 mg). In group 1, bleeding severity was 4.86 ± 0.77 during session 1 and 4.59 ± 0.66 during session 2. Data analysis showed no difference in bleeding severity between sessions 1 and 2 in group 1 (P = .72). In group 2, bleeding severity was 4.05 ± 0.94 during session 1 and 3.9 ± 0.85 during session 2. There was no difference in bleeding severity between sessions 1 and 2 in patients taking ASA (P = .19).

CONCLUSION

The results suggest that continuing the intake of antiplatelet drugs did not increase bleeding after placement of dental implants.