The CEJ is the more or less horizontal demarcation line that distinguishes the crown (A) of the tooth from root (B) of the tooth.
Identifiers
MeSH
D019237
TA2
926
FMA
55627
Anatomical terminology
[edit on Wikidata]
Cementoenamel junction (CEJ) is defined as the area of the union of cementum and enamel at the cervical region of the tooth. It is a slightly visible anatomical border identified on a tooth. It is the location where the enamel, which covers the anatomical crown of a tooth, and the cementum, which covers the anatomical root of a tooth, meet. Informally it is known as the neck of the tooth.[1] The border created by these two dental tissues has much significance as it is usually the location where the gingiva attaches to a healthy tooth by fibers called the gingival fibers.[2]
Active recession of the gingiva reveals the cementoenamel junction in the mouth and is usually a sign of an unhealthy condition. The loss of attachment is considered a more reliable indicator of periodontal disease. The CEJ is the site of major tooth resorption. A significant proportion of tooth loss is caused by tooth resorption, which occurs in 5 to 10 percent of the population. The clinical location of CEJ which is a static landmark, serves as a crucial anatomical site for the measurement of probing pocket depth (PPD) and clinical attachment level (CAL). The CEJ varies between subjects, but also between teeth from the same person.[1]
There exists a normal variation in the relationship of the cementum and the enamel at the cementoenamel junction. In about 60–65% of teeth, the cementum overlaps the enamel at the CEJ, while in about 30% of teeth, the cementum and enamel abut each other with no overlap. In only 5–10% of teeth, there is a space between the enamel and the cementum at which the underlying dentin is exposed.[3]
^ abVandana KL, Haneet RK (September 2014). "Cementoenamel junction: An insight". Journal of Indian Society of Periodontology. 18 (5): 549–554. doi:10.4103/0972-124X.142437. PMC 4239741. PMID 25425813.
^Clemente CD (1987). Anatomy, a regional atlas of the human body. Internet Archive. Baltimore : Urban & Schwarzenberg. ISBN 978-0-8067-0323-7.
^Carranza FA, Bernard GW (2002). "The Tooth-Supporting Structures". In Newman MG, Takei HH, Carranza FA (eds.). Carranza's Clinical Periodontology (9th ed.). Philadelphia: W. B. Saunders. p. 43. ISBN 978-0-7216-8331-7.
and 28 Related for: Cementoenamel junction information
Cementoenameljunction (CEJ) is defined as the area of the union of cementum and enamel at the cervical region of the tooth. It is a slightly visible anatomical...
periodontal disease. The cementum joins the enamel to form the cementoenameljunction (CEJ), which is referred to as the cervical line. Three possible...
biting, eating, chewing and grinding; the enamel, especially at the cementoenameljunction (CEJ), undergoes large amounts of stress, causing micro fractures...
Mucogingival junction (MGJ) of that tooth. These two groups were further divided based on the position of the alveolar bone crest to the cementoenameljunction. Abnormalities...
The term "anatomic crown" of a tooth refers to the area above the cementoenameljunction (CEJ) or "neck" of the tooth. It is completely covered in enamel...
may also form on the surface of the enamel of the crown at the cementoenameljunction (CEJ)). For cementogenesis to begin, Hertwig epithelial root sheath...
taurodontism include: lack of pulp chamber constriction at the cementoenameljunction (CEJ); an enlarged pulp chamber that appears rectangular in shape;...
radiolucency (dark area) around an unerupted tooth extending past the cementoenameljunction. It should be differentially diagnosed from a dentigerous cyst and...
anatomic crown of a tooth is the area covered in enamel above the cementoenameljunction (CEJ) or "neck" of the tooth. Most of the crown is composed of dentin...
to 2.5 mm, and thinnest at its border with the cementum at the cementoenameljunction. The normal color of enamel varies from light yellow to grayish...
follows the scalloped pattern established by the contour of the cementoenameljunction (CEJ) of the teeth. The marginal gingiva has a more translucent...
to 2.5 mm, and thinnest at its border with the cementum at the cementoenameljunction (CEJ). The normal color of enamel varies from light yellow to grayish...
extra cusp which extends at least half the distance between the cementoenameljunction and the incisal edge of the tooth. Other sources classify all enlarged...
dental follicle to form the PDL. Formation of PDL will start at the cementoenameljunction and proceeds in an apical direction. Movement of teeth is determined...
the contacts are also asymmetrical. Mesially, the contact sits at the junction of the incisal and middle third of the crown, while distally, the contact...
fits into the geometric shape of a trapezoid. The curvature of the cementoenameljunction (CEJ) or the cervical line sharply inclines towards the incisal...
limited to the crown of tooth. The lesion does not extend pass the cementoenameljunction (CEJ) or the pulp. Class II - Partial invagination. It extends beyond...
projects palatally and extends at least half the distance from the cementoenameljunction (CEJ) to the incisal edge Type 2 - Semitalon, an additional cusp...
furcation defect for improved oral hygiene. The distance between the cementoenameljunction (CEJ) and the furcation entrance is called the root trunk length...
enough to create small fossa on either side of it. Depicted by the cementoenameljunction, the cervical line is the border between the root and crown of a...
Sciences. ISBN 9780323227728. Vandana KL, Haneet RK (September 2014). "Cementoenameljunction: An insight". Journal of Indian Society of Periodontology. 18 (5):...
bone. Measuring the distance between the alveolar bone and the cementoenameljunction, P. robustus possibly suffered from a higher rate of tooth-attachment...
health, the junctional epithelium creates the most coronal attachment of the gum tissue to the tooth at or near the cementoenameljunction. In the established...
tooth by the primary EA. This fused tissue, which remains near the cementoenameljunction (CEJ) after the tooth erupts, serves as the initial JE of the tooth...
and the mean mesial-distal dimension of the same tooth at the cementoenameljunction (CEJ) is 6.4 mm. Even though the implant diameter chosen for the...
Look up cej in Wiktionary, the free dictionary. CEJ may refer to: Cementoenameljunction Central European Jamboree Chernihiv Shestovitsa Airport Coastal...
crown of an unerupted tooth and is attached to the tooth at the cementoenameljunction. Dentigerous cysts may also involve odontomas, which by their nature...
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