Infraction - diagnostic signs

Description	An incomplete fracture (crack) of the enamel without loss of tooth structure.
Visual signs	A visible fracture line on the surface of the tooth.
Percussion test	Not tender. If tenderness is observed evaluate the tooth for a possible luxation injury or a root fracture.
Mobility test	Normal mobility.
Sensibility pulp test	Not reliable in primary teeth. Inconsistent results.
Radiographic findings	No radiographic abnormalities.
Radiographs recommended	None.

Dental Trauma Guide 2010 - produced in cooperation with the Resource Centre for Rare Oral Diseases and Department of Oral and Maxillo-Facial Surgery
at the University Hospital of Copenhagen - Last edited the 07-01-2014.