Although examination may reveal a fissure on the surface of anterior tooth, radiographic examination is the way. On a periapical radiograph, the invagination lesion will appear as a radiolucent pocket. It is usually seen beneath the cingulum or incisal edge. Larger lesions can appear as fissures. A radio-opaque could be shown. Pulp may be involved and the root canal could have complex anatomy. Two periapical radiographs are often required to make sure that it is not a masked lesion. Cone beam computed tomography (CBCT) is useful in diagnosing DI. It provides clinicians a detailed 3D image and could aid treatment planning. Feasibility of root canal treatment or apical surgery or other procedures could be assessed. Oehlers classification
Class I - Partial invagination. It is limited to the crown of tooth. The lesion does not extend pass the cementoenamel junction (CEJ) or the pulp. Class II - Partial invagination. It extends beyond the crown and CEJ. Pulp may be involved but remain within the root anatomy. There is no communication of the lesion with periodontal ligament (PDL). Class IIIa - Complete invagination. It extends through root and communicates with PDL. It usually does not involve the pulp but can cause anatomical malformation. Class IIIb - Complete invagination. It extends through the root and communicates with PDL through apical foramen. Pulpal anatomy may not be directly involved but can cause disruption to the dental anatomy.
Out may refer to:

Arts, entertainment, and media
Films
Out (1957 film), a documentary short about the Hungarian Revolution of 1956
Out (1982 film), an American film directed by Eli Hollander
Out (2002 film), a Japanese film based on the novel by Natsuo Kirino and directed by Hideyuki Hirayama
Out (2013 film), a Canadian short comedy film directed by Jeremy LaLonde
Out (2017 film), a Slovak film directed by György Kristóf
Out (2020 film), an American animated film produced by Pixar

Music
Out (jazz) or outside, an approach to jazz improvisation
OUT, a band produced by Adam Walton
OUT, a 1994 album by Nav Katze
Out (In Essence), a 1991 album by Fluke

Television
Out (miniseries), a 1978 British television crime drama starring Tom Bell
"Out" (Dark Angel), a television episode

Other uses in arts, entertainment, and media
Out (magazine), an LGBT fashion, entertainment, and lifestyle magazine
Out (novel), a 1997 novel by Natsuo Kirino
OUTeverywhere, a community website for LGBT people around the world

Sports and recreation
Out (baseball), a play which retires the batter or a base runner
Out (cricket), the loss of a wicket by a batsman; also known as "dismissal"
Out (poker), an unseen card which is expected to win a hand, if drawn
Out (route), a pattern run by a receiver in American football

Sexuality
Coming out, publicly revealing ones own LGBT status
Outing, publicly revealing someone elses LGBT status

Mathematics
Out(Fn), the outer automorphism group of a free group on n generators
Outer automorphism group, a quotient Out(G) of the automorphism group

Transport
Outwood railway station, West Yorkshire, National Rail station code

Other uses
Out, a procedure word in voice radio communication

See also
Outing (disambiguation)
Outside (disambiguation)
All pages with titles containing Out
All pages with titles beginning with Out