: It is an abnormal passage or connection between two internal organs or spaces. In dentistry it is often used to describe the exit point from a source of infection. It is an epithelium lined tube through which pus drains from an area of infection.
: It is an abnormal passage or connection between two internal organs or spaces. In dentistry it is often used to describe the exit point from a source of infection. It is an epithelium lined tube through which pus drains from an area of infection.