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 ?
Os acromiale is often discovered as an incidental finding during the radiographic evaluation of a patient with shoulder pain, with the unfused acromial ossification centers being unrelated to the patient's symptomatology.
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.
Moose had earlier formation of thyroid and adrenal glands, thymus, ossification centers in the skeleton, and of characteristic structures in the organs of the alimentary tract in comparison with domestic animals.
The etiology of the disease is multifactorial and may include trauma, ischemia, abnormal ossification centers, and genetic predisposition2.