Table 2.

The codes and descriptions of the PUFA index

Code	Description
P/p:	Pulpal involvement: the opening of the pulp chamber is visible or the coronal tooth structures have been destroyed by the carious process and only roots or root fragments are left
U/u:	Ulceration due to trauma: sharp edges of a dislocated tooth with pulpal involvement or root fragments have caused traumatic ulceration of the surrounding soft tissues, e.g., tongue or buccal mucosa
F/f:	Fistula: a pus releasing sinus tract related to a tooth with pulpal involvement is present
A/a:	Abscess: a pus containing swelling related to a tooth with pulpal involvement is present