What is the cementum of a tooth?

The cementum is the surface layer of the tooth root, covering the dentine (which is labeled B). The cementum is the part of the periodontium that attaches the teeth to the alveolar bone by anchoring the periodontal ligament.

See further detail related to it here. In this way, what are the two types of cementum?

Two types of cementum are recognised: cellular cementum, which contains cells called cementocytes, and acellular, which does not.

Furthermore, what is the Periodontium? The periodontium is the specialized tissues that both surround and support the teeth, maintaining them in the maxillary and mandibular bones. The word comes from the Greek terms περί peri-, meaning “around” and -odont, meaning “tooth”. It provides the support necessary to maintain teeth in function.

Just so, where is cementum located?

Acellular cementum is located around the root neck and cellular cementum is covering the root up to the apex. The cementum is connected with the dentin layer by collagen fibers and with the bony alveolus by Sharpey’s fibers.

Can cementum repair itself?

Cementum is capable of repairing itself to a limited degree, but not regenerate. and is not resorbed under normal conditions.

What part of the tooth has DNA?

But dentine contains more DNA, and in addition the pulp contains cells and vessels that are protected by the dentine, cement and enamel, and these are the best sources of DNA in a tooth, to identify human remains or even to do ancient DNA studies.

What is primary cementum?

Cementum is a mineralized tissue that covers the outermost layer of a tooth root [5, 6]. The primary function of cementum is to confine tooth motion by way of the PDL, as well as to provide support and load absorption during mastication [6, 7]. In general, cementum exists in two forms, primary and secondary.

Where is acellular cementum found?

Acellular afibrillar cementum is located mainly around the cemento-enamel junction covering further small enamel areas. Its distribution pattern varies from tooth to tooth and along the cemento-enamel junction of the same tooth [9].

What is cellular cementum?

Cellular cementum contains cells and is the medium of attachment of collagen fibres to the alveolar bone. It is also responsible for minor repair of any resorption by continued deposition to keep the attachment apparatus intact. Acellular cementum does not contain cells and has a main purpose of adaptive function.

What is tooth cementum made of?

Composition. 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.

Can dentin regrow?

This could all change. The research shows the drugs can coax stem cells within the dental pulp — the soft material deep within teeth that’s filled with nerves and blood vessels — into regrowing enough bony tissue (dentin) to fill the cavity.

What is lamina dura?

Lamina dura is compact bone that lies adjacent to the periodontal ligament, in the tooth socket. The lamina dura surrounds the tooth socket and provides the attachment surface with which the Sharpey’s fibers of the periodontal ligament perforate. Under the lamina dura is the less bright cancellous bone.

What is sensitive cementum?


A layer called cementum protects the tooth root under the gum line. Underneath the enamel and the cementum is dentin, a part of the tooth that is less dense than enamel or cementum. The dentin contains microscopic tubules (small hollow tubes or canals).

Where do Sharpey’s fibers insert?

In the teeth, Sharpey’s fibres are the terminal ends of principal fibres (of the periodontal ligament) that insert into the cementum and into the periosteum of the alveolar bone.

What is the pulp?

The pulp is the part in the center of a tooth made up of living connective tissue and cells called odontoblasts. The pulp is a part of the dentin–pulp complex (endodontium).

What is decay involving two surfaces of a tooth called?

Tooth decay, also known as dental caries or cavities, is a breakdown of teeth due to acids made by bacteria. Complications may include inflammation of the tissue around the tooth, tooth loss, and infection or abscess formation.

Is cementum harder than bone?

Cementum. The thin layer of cementum which covers the whole surface of the root is an important tissue for the maintenance of periodontal health as it attaches the fibres of the periodontal ligament to the tooth. Cementum is softer than dentine and is similar in many ways to bone.

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