special _ estrazioni strumenti utilizzati devono essere rigorosamente rispettati e, se necessario, bisogna intraprendere una decontaminazione preliminare della cavità orale con clorexidina allo 0,2%. Nel caso di alveolite, Syrjänen e Syrjänen consigliano l’uso locale di una piccola dose di Al- veogyl, che, grazie della presenza di fibre Peng- hawar, produce un effetto calmante sul tessuto. Nel diciannovesimo secolo queste fibre, ottenu- te da alcune felci, venivano già utilizzate per il loro effetto emostatico, producendo un risultato discreto. Inoltre è consigliato l’uso di spugne di clorexidina gluconato per una settimana, dopo un accurato curettage alveolare. _bibliografia _ Akhlaghi F, Khaheshi I, Amirhassani S, Tabrizi R. Do antiplatelet drugs increase the risk of bleeding after tooth extraction? A case-crossover study. Int J Oral Maxillofac Surg. 2017;46(11):1475-1478. _ Malamed SF. Results of a survey of 209 dentists. 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