A contusion is more commonly called a bruise and indicates that some amount of tissue disruption has occurred within the tissues, which resulted in subcutaneous or submucosal hemorrhage without a break in the soft tissue
surface (Fig. 23-2).
W’hen there has been no break in the surface of the soft tissue, infection is unlikely and systemic antibiotics are not indicated, ICllOWe\Tr, the contusion is secondary to dentoalveolar trauma, it is li~ely that communication. mav exist between the oral cavity and the submucosal
hematoma, In this case systemic antibiotics are warranted. because coagulated blood represents an ideal culture medium .