cementum


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Related to cementum: acellular cementum

cementum

 [se-men´tum]
the bonelike connective tissue covering the root of a tooth and assisting in tooth support.
 Cementum covering the anatomical root of an anterior tooth. Dorland's, 2000.

ce·ment

(sē-ment'), [TA]
1. A layer of bonelike, mineralized tissue covering the dentin of the root and neck of a tooth that anchors the fibers of the periodontal ligament. Synonym(s): cementum [TA]
2. In dentistry, a nonmetallic material used for luting, filling, or permanent or temporary restorative purposes, made by mixing components into a plastic mass that sets, or as an adherent sealer in attaching various dental restorations in or on the tooth.
[L. caementum, rough quarry stone, fr. caedo, to cut]

cementum

/ce·men·tum/ (sĕ-men´tum) the bonelike connective tissue covering the root of a tooth and assisting in tooth support.

cementum

(sĭ-mĕn′təm) also

cement

(-mĕnt′)
n.
A bonelike substance covering the root of a tooth.

cementum

[simen′təm]
the bonelike connective tissue that covers the roots of the teeth and helps to support them by providing a place of attachment for the periodontal ligament fibers and overlying dentin.

ce·men·tum

(sĕ-men'tŭm) [TA]
A layer of bonelike mineralized tissue covering the dentin of the root and neck of a tooth that blends with the fibers of the periodontal ligament.
[L. caementum, rough quarry stone, fr. caedo, to cut]

cementum

The layer of calcified substance covering the root of a tooth.

ce·ment

(sĕ-ment') [TA]
1. In dentistry, nonmetallic material used for luting, filling, or permanent or temporary restorative purposes, made by mixing components into a plastic mass that sets, or as an adherent sealer in attaching various dental restorations in or on the tooth.
Synonym(s): cementum [TA] .
2. A layer of bonelike, mineralized tissue covering dentin of root and neck of a tooth that anchors fibers of the periodontal ligament.
[L. caementum, rough quarry stone, fr. caedo, to cut]

cementum (səmen´tum),

n a specialized, calcified connective tissue that covers the anatomic root of a tooth, giving attachment to the periodontal ligament.
Enlarge picture
Cementum.
cementum, abnormalities of,
n.pl includes the reversal lines in the cementum, which represent bone tissue resorption or cementum resorption. Cementicles are calcified epithelial cells found in older persons. Hypercementosis is cementum overgrowth on the roots. See also reversal lines, cementicle, and hypercementosis.
cementum, acellular,
n the cementum that contains no cementocytes.
cementum, cellular,
n the portion of the calcified substance covering the root surfaces of the teeth. It is bonelike and contains cementocytes embedded within lacunae, with protoplasmic processes of the cementocytes coursing through canaliculi that anastomose with canaliculi of adjacent lacunae. The lacunae are dispersed through a calcified matrix arranged in lamellar form. It is localized primarily at the apical portion of the root but may deposit over the acellular cementum or serve to repair areas of cemental resorption.
cementum, collagen fibrils of,
n the fibrils that penetrate the cementum surface and are continuous with the periodontal fibers necessary for tooth support.
cementum, lamellar,
n the cementum in which layers of appositional cementum are arranged in a sheaflike pattern, the layers of cementum being more or less parallel to the cemental surface and demarcated by incremental lines that represent periods of inactivity of cementum formation.
cementum, necrotic,
n nonvital cementum that is situated coronal to the bottom of the periodontal pocket.
cementum, properties of,
n.pl the calcified, avascular connective tissue that is derived from the dental sac and functions in protecting the roots of teeth.
cementum, secondary,
n the term used to describe all subsequent layers of cementum formed after the primary layer. It may be cellular or acellular.

cementum

the bonelike connective tissue covering the root of a tooth and assisting in tooth support.
References in periodicals archive ?
sup][15] reported that an increase in the number of bone walls generally correlated with a significant increase in periodontal ligament and cementum and a decrease in formation of JE in self-healing condition after OFD.
We submitted teeth for cementum line counts (Matson's Lab, Milltown, Montana, USA) where teeth were decalcified, laterally sectioned, stained, and mounted on slides following standard protocols (< http://matsonslab.
Therefore, our objectives were to compare 2 commonly used aging techniques for Cougars, including gum-line measurements (Laundre and others 2000) and cementum annuli analysis (Schroeder and Robb 2005), and to discuss potential issues related to error and disagreement between these techniques.
At the same time, a large amount of new cementum was evidently found in Icariin-treated groups (Fig.
Orthopantamogram (OPG) showed (Figure 1c) a radiolucent line in relation to the left mandibular primary first molar (74) which was running obliquely from occlusal to gingival involving enamel, dentine, cementum and close to the pulp in the mesial aspect.
Although the method of deposition of cementum layers presents better accuracy to age estimation in most of the investigated mammal species (Thomas and Bandy, 1975; King, 1991; Clarke et al.
The term bone fill is used purposefully instead of new attachment (new bone, new cementum, new periodontal ligament and new connective tissue) because only histological examination will confirm, whether there is new attachment occur or not.
We collected the lower jaw from this animal and excised an incisor for analysis of cementum annuli (Gilbert, 1966).
These merge with areas of cemental islands in a vascular stroma with prominent characteristic radiating columns of cementum running perpendicular to the surface of the lesion.
All individual bears that are not caught as cubs are aged by counting the growth-layer groups in the cementum of a vestigial premolar tooth (Calvert and Ramsay, 1998).
During physical inspection of the adult female, a lower premolar was extracted and the bear was later aged at 12 y based on cementum annuli (Stoneberg and Jonkel, 1966; Matson's Laboratory LLC, Milltown, Montana).
It has been observed that coronal displacement of cementum in impacted teeth determined the age.