Enthesis

Enthesis

Enthesis (plural: entheses) is the point at which a tendon or ligament [Medcyclopaedia|iii_1/e/enthesis] or muscle [DorlandsDict|three/000035780|enthesis] inserts into bone, where the collagen fibers are mineralized and integrated into bone tissue. These insertion points are commonly called Sharpey's fibers.

Classification

There are two types:
* Fibrous entheses
* Fibrocartilaginous entheses

In a fibrous enthesis, the collagenous tendon or ligament directly attaches to the bone, whilst the fibrocartilaginous enthesis displays 4 zones during the transition from tendon/ligament to bone:
* i) tendinous area displaying longitudinally oriented fibroblasts and a parallel arrangement of collagen fibres

* ii) a fibrocartilaginous region of variable thickness where the structure of the cells changes to chondrocytes

* iii) an abrupt transition from cartilaginous to calcified fibrocartilage - the so-called 'tidemark' or 'blue line'

* iv) bone

Pathology

A disease of the entheses is known as an "enthesopathy" or "enthesitis" and is characteristic of spondyloarthropathy but present in other pathology as well.

References

External links

* [http://images.medscape.com/pi/editorial/cmecircle/2004/2890/images/slide13.gifImage of enthesis] at Medscape
* [http://www.chiroweb.com/archives/18/19/23.html Enthesopathy and Soft Tissue Shadows] at chiroweb.com
*
* [http://www.rheuma21st.com/archives/report_khan_2int_enthesitis_meet.html Origin of phrase at rheuma21st.com] at rheuma21st.com


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Look at other dictionaries:

  • enthesis — noun The point at which a tendon, ligament, or muscle inserts into a bone. See Also: enthesopathy, enthesitis …   Wiktionary

  • enthesis — n. 1. the site of insertion of tendons or ligaments into bones. 2. the insertion of synthetic inorganic material to replace lost tissue. * * * en·the·sis (en theґsis) [Gr. “a putting in; insertion”] the site of attachment of a muscle or… …   Medical dictionary

  • enthesis — n. 1) the site of insertion of tendons or ligaments into bones. 2) the insertion of synthetic inorganic material to replace lost tissue …   The new mediacal dictionary

  • Энтез (Enthesis) — соединение сухожилия с костью. Источник: Медицинский словарь …   Медицинские термины

  • ЭНТЕЗ — (enthesis) соединение сухожилия с костью …   Толковый словарь по медицине

  • Parenthese — Zwischensatz; Einschub; Zwischenbemerkung * * * Par|en|the|se auch: Pa|ren|the|se 〈f. 19〉 1. 〈Sprachw.〉 eingeschobener Rede od. Satzteil 2. = Klammer ● ein Wort, einen Satz in Parenthese setzen [<grch. parenthesis „Zusatz“] * * *… …   Universal-Lexikon

  • parenthèse — [ parɑ̃tɛz ] n. f. • 1546; parenteze 1493; lat. parenthesis, du gr. enthesis « action de mettre » 1 ♦ Insertion, dans le corps d une phrase, d un élément qui, à la différence de l incise, interrompt la construction syntaxique; cet élément.… …   Encyclopédie Universelle

  • Bone — This article is about the skeletal organ. For other uses, see Bone (disambiguation) and Bones (disambiguation). For the tissue, see Osseous tissue. Drawing of a human femur Bones are rigid organs that constitute part of the endoskeleton of… …   Wikipedia

  • Ligament — Diagram of the right knee. Typical joint In …   Wikipedia

  • Cartilage — Hyaline cartilage showing chondrocytes and organelles, lacunae and matrix Cartilage …   Wikipedia

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