ossification center


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Related to ossification center: secondary ossification center

ossification center

[TA]
the site of earliest bone formation via accumulation of osteoblasts within connective tissue (membranous ossification) or of earliest destruction of cartilage before onset of ossification (endochondral ossification).

ossification center

The site or sites in bones where calcification begins and bone replaces fibrous connective tissue or cartilage. The region of bone formation at the center of the body of a long bone is called the primary (diaphyseal) ossification center. Most secondary ossification centers are found in the epiphyses.
See also: center

ossification

formation of or conversion into bone or a bony substance.

biceps brachii ossification
causes a progressive lameness of the shoulder joint of the horse. The calcification of the tendon can be identified radiologically.
ossification center
a locus in an epiphysis or other part of a bone at which ossification commences and from which it spreads over the entire section. Radiological examination can detect the appearance of each ossification center and this is of assistance in aging.
dural ossification
occurs in large and giant breed dogs. Detected radiographically, most commonly in the lumbar and cranial and caudal cervical areas, but rarely produces clinical signs. Called also ossifying pachymeningitis.
ectopic ossification
see ectopic mineralization.
enchondral ossification
ossification that occurs in and replaces cartilage.
ossification groove
located at the physeal end of the perichondrial ring of long bones. It supplies chondrocytes to the physis for the diametric growth of the bone. Called also groove of Ranvier.
intramembranous ossification
the formation of bone directly from fibrous tissue without the use of a cartilaginous model, e.g. as occurs in the parietal and frontal bones.
lateral cartilage ossification
retarded enchondral ossification
the ossification of cartilage in growing large dogs may be retarded and, at the distal ulnar growth plate, resembles premature closure of the plate; the characteristic lesion is a cone of uncalcified cartilage in the growth plate.
References in periodicals archive ?
Scintigraphy study reports no alterations, while magnetic resonance reveals multiple ossification centers of the femoral head with normal signal intensity and decrease in epiphysis size (6).
The dentary, coronoid and supra-angular present ossification centers in stage 16, with greater dye retention in the dentary, indicating that this element is the first to present an ossification center (Figures 3A, B and 4A).
12,13) Type I, or os tibiale externum, occurs when an ossification center forms a sesamoid bone within the tibialis posterior tendon, near the navicular insertion.
Then, at around age 10 or 11, a more superior tertiary ossification center appears in the apophysis of the calcaneus.
there was a significant proportion of fetuses with malformed occipital bones, shorter 13th ribs, dumbbell-shaped sternebra and reduced number of ossification centers in hindlimb phalanges and caudal vertebra.
th] gestational week), different ossification centers appear in the center of both anterior-cartilages.
It was established that ossification centers in the cartilaginous anlages of fore limbs appear a day earlier than in the hind ones, and the process of ossification is slower.
It is important to keep in mind the progression of ossification centers in children, since patellar anomalies can be missed.
The central and posterior skull base sutures, synchondroses and ossification centers were all assessed for normal appearance and age of closure.
Several ossification nuclei give origin to the three anterior acromial ossification centers, and, between 15 and 18 year of age, they unify into the metaacromion, mesoacromion, and preacromion (Kurtz et al.
X-ray wrist showed delayed bone age in 9 (18%) cases and in 6 (12%) infants more than six months old no ossification centers could be found.
3) Secondary ossification centers of the elbow appear first at the capitellum (age 2), followed by the radial head (age 5), medial epicondyle (age 7), trochlea (age 9), and lateral epicondyle (age 11).