RESUMEN
@#Tooth extraction in patients receiving anticoagulation/antiplatelet therapy is often considered contraindicated by many oral and maxillofacial surgeons because of a higher risk of postoperative bleeding. Multiple factors contribute to postoperative bleeding, but there is no consensus. Based on recent literature, this article reviews factors related to bleeding after tooth extraction in patients receiving anticoagulation/antiplatelet therapy. The literature review indicates that patients taking antiplatelet drugs have a lower postoperative bleeding risk than patients taking anticoagulant drugs. Prescription of anticoagulants together with non-steroidal anti-inflammatory drugs, selective serotonin inhibitors or serotonin-norepinephrine inhibitors increases the risk of bleeding, so does preoperative antibiotic use increase. In addition, systemic diseases such as diabetes, history of infection at the extraction site, and greater surgical trauma are associated with a higher risk of postoperative bleeding. At present, it is generally believed that it is safe and feasible to use different hemostatic measures after tooth extraction and to rationally apply different hemostatic measures after surgery. More prospective controlled trials are needed in the future to establish an assessment system for patients undergoing anticoagulation/antiplatelet therapy under different conditions during tooth extraction.
RESUMEN
<p><b>UNLABELLED</b>To investigate the expressions of fibrillin-1, elastin and matrix metalloproteinase-1 and -9 (MMP-1, 9) in chronic actinic dermatitis in elderly patients and explore the pathogenesis of the disease.</p><p><b>METHODS</b>Twenty-three patients with chronic actinic dermatitis were examined for the expressions of fibrillin-1, elastin, MMP-1, and MMP-9 with immunohistochemistry in the skin lesions. Image analysis was carried out to measure MMP-1 and MMP-9 expressions semi-quantitatively.</p><p><b>RESULTS</b>In the skin lesions of patients with chronic actinic dermatitis, elastin expression was obviously reduced or absent in the papillary dermis. The elastic fibers were disorderly arranged in the reticular dermis with local aggregation in some regions. Obvious fibrillin-1 deposition was found in the reticular dermis. Increased expressions of MMP-1, but not that of MMP-9, was found in the skin lesions of the patients.</p><p><b>CONCLUSION</b>Elastin and fibrillin-1 deposition can be found in the skin lesions in patients with chronic actinic dermatitis, suggesting the association of increased MMP-1 expression with the elastic tissue degeneration in the lesions. MMP-9 does not exhibit an obvious association with the pathogenesis of chronic actinic dermatitis in elderly patients.</p>