Prophylaxis is directed against viridans-group streptococci
Procedures for which dental prophylaxis should be given to appropriate candidates include any procedures that involve manipulation of gingival tissue or the periapical region of the teeth or perforation of the oral mucosa.
Prophylactic Regimens for Infective Endocarditis Before Dental Procedures
Procedures that do not require prophylaxis include:
Routine anesthetic injections through noninfected tissues
Placement of removable prosthodontic or orthodontic appliances
Adjustment of orthodontic appliances
Placement of orthodontic brackets
Prophylaxis is also not necessary after the shedding of deciduous teeth or for bleeding from trauma to the lips or oral mucosa.