Periosteum

(redirected from periost)
Also found in: Dictionary, Thesaurus, Medical.

periosteum

[‚per·ē′äs·tē·əm]
(anatomy)
The fibrous membrane enveloping bones, except at joints and the points of tendonous and ligamentous attachment.

Periosteum

 

connective tissue in vertebrate animals and man that invests bone (excluding the articular facets, linea aspera, and tuberosities); it joins the bone by means of bundles of collagen fibers and blood vessels.

Three layers are distinguished within the periosteum: the external layer (adventitia), which consists of fibrous connective tissue rich in blood vessels; the middle fibroelastic layer, which consists of collagen fibers; and the internal osteoblastic layer, which contains osteoblasts and is usually absent in adult organisms. The periosteum joins bone with surrounding tissues, assures growth of bone tissue (mainly in thickness), and in adult organisms assures regeneration of bone tissue.

References in periodicals archive ?
Birinci haftadan sonra metafiz destruksiyonu ve sekestrum, 2 haftadan sonra periost reaksiyonu ve involukrum izlenir.
Sonrasinda sert damak mukozasi ve periost icine lokal anestetik (%2 lidokain ve adrenalin 1:100000) enjeksiyonu ile buyuk palatin ve nasopalatin sinir anestezisi saglandi.
Grup 1 preseptal selulit olup, goz kapaginin intraorbital yapilari tutmadan olusan odemini; grup 2 orbital selulit olup, orbita icerisinde apse olusmadan intraorbital diffuz odem ve enflamasyon gelismesini; grup 3 subperiostal apse olup, orbita kemik duvari ile kemigi cevreleyen periost arasina apse mayinin toplanmasini; grup 4 orbital apse olup, orbita icerisinde iltihabi mayinin toplanmasini; grup 5 kavernoz sinus trombozu olup, orbital enfeksiyonun geriye dogru yayilarak kavernoz sinuslere ulasmasini tanimlamaktadir.