What is CEJ in dentistry? [1] The cemento-enamel junction (CEJ) represents the anatomic limit between the crown and root surface[2] and is defined as the area of union of the cementum and enamel at the cervical region of the tooth.
What is the function of Cementoenamel Junction? The cementoenamel junction is the part of the tooth where two vital substances that protect the tooth meet on the tooth’s surface. Sometimes called the neck of the tooth, the cementoenamel junction can be visible to the naked eye due to the difference in color between enamel and cementum.
What is cervical line in tooth? The cervical line or neck of the tooth is a slim, irregular margin that constitutes the boundary between the enamel covering the crown and the cementum covering the root. At this line the cementum usually overlaps the enamel slightly, although they can meet end on occasionally.
What is enamel made of? Enamel is the hardest substance in the human body, and it covers the outer surface of your teeth. It is made mostly of an extremely hard mineral called calcium phosphate. Dentin makes up the layer just below your tooth’s enamel. It consists of living cells that secrete a mineral substance.
What is CEJ in dentistry? – Related Questions
What does CEJ mean?
[1] The cemento-enamel junction (CEJ) represents the anatomic limit between the crown and root surface[2] and is defined as the area of union of the cementum and enamel at the cervical region of the tooth.
Is cementum part of the tooth?
Cementum is a thin layer of hard dental tissue covering the anatomic roots of teeth. It is formed by cells known as cementoblasts, which develop from undifferentiated mesenchymal cells in the connective tissue of the dental follicle.
What is hyper Cementosis?
Hypercementosis is excessive deposition of non-neoplastic cementum over normal root cementum, which alters root morphology. This cementum may be either hypocellular or cellular in nature.
What is the hardest substance in the body?
Tooth enamel is the hardest substance in the body.
The shiny, white enamel that covers your teeth is even stronger than bone. This resilient surface is 96 percent mineral, the highest percentage of any tissue in your body – making it durable and damage-resistant.
Is Cementoblastoma same as Cementoma?
Cementoblastoma or true cementoma is a rare benign mesenchymal odontogenic tumor arising from cementoblasts. This tumor is characterized by the formation of an expansive mass of cementum-like tissue intimately associated to the root of a tooth.
What is the neck of the tooth called?
Neck. The neck, also called the dental cervix, sits between the crown and root. It forms the line where the cementum (that covers the root) meets the enamel.
What is a Class 5 cavity?
Class V cavities
Class V lesions occur on the cervical 1/3 of the labial surfaces of incisors and canines; and on the buccal and lingual surfaces of premolars and molars. They take place under two case scenarios; through the formation of caries or through the loss of tooth substance due to abrasion/erosion.
Where is the cervical third of a tooth?
Three are located on the facial side of the tooth, and one on the lingual side. The cingulum forms from this lingual lobe of development. The majority of a lingual surface’s cervical third is made up of the cingulum. On lower incisors, a cingulum usually is poorly developed or absent.
Where is enamel thickest?
Enamel thickness varies on the dental crown, being thickest on the buccal surfaces (about 2.5 mm) and thinner toward the cervix.
Can you rebuild enamel?
Once tooth enamel is damaged, it cannot be brought back. However, weakened enamel can be restored to some degree by improving its mineral content. Although toothpastes and mouthwashes can never “rebuild” teeth, they can contribute to this remineralization process.
What Colour is enamel?
Enamel is on the surface of every tooth and it has a natural hue of white. However, the underlying dentin layer has a slightly yellowish color. This yellowish hue shows through the enamel in almost everyone, but more so for those with naturally thinner or more translucent enamel.
How would you record attachment levels if the CEJ is absent?
If the CEJ is not present due to a restoration, or difficult to determine, it can be recorded from margin of a restoration or a stent and the recording thus made is referred as Relative attachment level (RAL).
What does cementum feel like?
An important property of this material that covers the root surface is that, much like the enamel, cementum has no nerves and hence no feeling if it is exposed.
What is passive eruption?
Altered passive eruption is described as a condition in which the relationship between teeth, alveolar bone, and the soft tissues creates an excessive gingival display and, in turn, in some circumstances, it may reveal a clinical aspect also known as the “gummy smile.” The surgical management of such cases is well
What is tooth cementum made of?
Cementum is slightly softer than dentin and consists of about 45% to 50% inorganic material (hydroxylapatite) by weight and 50% to 55% organic matter and water by weight. The organic portion is composed primarily of collagen and proteoglycans.
What is cementum apposition?
The amount of dental cementum apposition was studied in 1000 teeth, excluding molars, from a Caucasian population. The sum of the cementum thickness on vestibular and lingual surfaces, measured at one third of the root length from the apex, showed the strongest correlation with age (r = 0.40 to 0.65).
Where is the thinnest part of cementum?
The thickness of the cementum varies at different levels of the tooth root. It is thickest at the apex of the root and between two roots when a tooth has more than one root. It is thinnest at the upper part of the root where it is 10-15µm thick.
Which is most frequently affected by root Dilaceration?
Dilaceration is defined as a deviation or bend in the linear relationship of a tooth crown to its root. This occurs most often in the permanent dentition and frequently affects the maxillary incisors (Fig. 10).
Which disorder is associated with Hypercementosis of teeth?
Equine Odontoclastic Tooth Resorption and Hypercementosis, also known as EOTRH, is a syndrome in horses that results in resorptive lesions of the incisors and sometimes canine teeth. It is usually gradual in onset, though often isn’t diagnosed until quite extensive lesions are present.
What is Earth’s hardest material?
(PhysOrg.com) — Currently, diamond is regarded to be the hardest known material in the world. But by considering large compressive pressures under indenters, scientists have calculated that a material called wurtzite boron nitride (w-BN) has a greater indentation strength than diamond.
Is Cementoma cancerous?
Prognosis. No malignant form of this conditions exists and rarely will the mass reappear. Individuals can expect full recovery from this condition with the proper treatment and removal of affected area. Although recurrence of cementomas is extremely rare, post-surgical and long-term follow ups are recommended.
