| 词汇 | osteoid |
| 释义 | osteoid noun[ U ] anatomy specializeduk /ˈɒs.ti.ɔɪd/ us /ˈɑː.sti.ɔɪd/ new bone that has not yet calcified(= become hard): Rickets is a failure of the osteoid, the cellular matrix of the bone, to become mineralized. This results in increased amounts of osteoid (unmineralized bone) and decreased mineralized bone. In this abnormality, the osteoblasts in bone continue to synthesize osteoid, but this material is not mineralized. The newly formed osteoid is rapidly converted into hard bone matrix by the deposition of hydroxyapatite crystals between the closely packed collagen fibres. Defective mineralization results in an increase in the thickness of the osteoid seams and not in failure of osteoid formation. Bone structures acetabular acetabulum acromial acromioclavicular acromion foramen magnum frontal bone glenoid gnathic gynecoid osteophyte osteotomy parietal parietal bone pectoral girdle TMJ trapezoidal triquetrum true rib tubercle osteoid adjective anatomy specializeduk /ˈɒs.ti.ɔɪd/ us /ˈɑː.sti.ɔɪd/ relating to or like bone: The most common benign tumour of the spine is osteoid osteoma. The histological features of osteoid tissue, apart from its amount, are the same in the different species studied. Osteoid osteoma is a benign primary bone tumour that typically occurs in children and young adults. Bone structures acetabular acetabulum acromial acromioclavicular acromion foramen magnum frontal bone glenoid gnathic gynecoid osteophyte osteotomy parietal parietal bone pectoral girdle TMJ trapezoidal triquetrum true rib tubercle |
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