Chronical periapical parodontitis

Chronical periapical parodontitis is chronical inflamatory response of periapical parodon­tal tissues to bacterial infection. Patohistologically it represents nonspecifical chronical mononuclear inflamatory infiltration of fibrous tissue. Its pathogenesis depends on more fac­tors. The immunological mechanisms have important rule, among them expecially late hypersensitivity.