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Cementum situated around a human molar The cementum is the surface layer of the tooth root, covering the dentin (which is labeled B). Rather than being a passive entity like paint on a wall, cementum is a dynamic entity within the periodontium .
In animal tooth development, cementogenesis is the formation of cementum, one of the three mineralized substances of a tooth.Cementum covers the roots of teeth and serves to anchor gingival and periodontal fibers of the periodontal ligament by the fibers to the alveolar bone (some types of cementum may also form on the surface of the enamel of the crown at the cementoenamel junction (CEJ)).
Cementum is a specialized bone like substance covering the root of a tooth. [15] It is approximately 45% inorganic material (mainly hydroxyapatite), 33% organic material (mainly collagen) and 22% water. Cementum is excreted by cementoblasts within the root of the tooth and is thickest at the root apex. Its coloration is yellowish and it is ...
Human Tooth Diagram. Cementoma is an odontogenic tumor of cementum.It is usually observed as a benign spherical mass of hard tissue fused to the root of a tooth. [1] It is found most commonly in the mandible in the region of the lower molar teeth, occurring between the ages of 8 and 30 in both sexes with equal frequency . [1]
A cementicle is a small, spherical or ovoid calcified mass embedded within or attached to the cementum layer on the root surface of a tooth, or lying free within the periodontal ligament. [1] [2] They tend to occur in elderly individuals. [3] [4] There are 3 types: [5] [6] Free cementicle – not attached to cementum [5]
The volcanic ash and pulverized brick supplements that were added to the burnt lime, to obtain a hydraulic binder, were later referred to as cementum, cimentum, cäment, and cement. In modern times, organic polymers are sometimes used as cements in concrete.
Cemento-osseous dysplasia (COD) is a benign condition of the jaws that may arise from the fibroblasts of the periodontal ligaments.It is most common in African-American females.
The periodontal ligament is the connective tissue that joins the outer layer of the tooth root, being the cementum, to the surrounding alveolar bone. It is composed of several complex fibre groups that run in different directions and which insert into the cementum and bone via Sharpey's fibres . [ 4 ]