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At least 847 records · Page 47Linked to original sources
PubMed1978

Pre-apatitic mineral deposition in Bacterionema matruchotii.

A preliminary examination of calcification of Bacterionema matruchotii was undertaken to provide a base-line for future kinetic and mechanistic studies. Specific ion ratios were correlated with crystallography and ultrastructure. Observations include: three consistent X-ray diffraction patterns; no resolution of cellular EMP by electron microscopy; increasing Ca/Mg, Ca/P during calcification.

Actinomycetaceae↗
PubMed1979

Enamel apatite nucleation and crystal growth.

The course of enamel remineralization in aqueous solution is markedly dependent upon factors such as ionic medium supersaturation, pH, ionic strength, and the relative concentration of mineralizing surface. Although numerous attempts have been made to determine the mechanism of both the spontaneous and seeded precipitation reactions, it is only recently, through the use of a constant solution composition technique, that quantitative information can be obtained concerning the intermediate calcium phosphate phases which are formed during mineralization. Studies of surface phases in the presence of potential anti-calculus and anti-caries agents are facilitated using this approach.

Apatites↗
PubMed1989

The emergence and maturation of the first apatite crystals in an in vitro bone formation system.

Using chick periosteal bone forming cultures we have followed the appearance of the first crystals during de Novo bone formation. The first detectable mineral deposits are crystalline. By x-ray diffraction and dark field imaging we found crystal length to grow from around 100 angstroms on day 4 to (135-160) Angstroms by day 8. The Ca/P ratio rose from 1.46 at day 4 to 1.60 at day 8.

Animals↗
PubMed1997

Calcium carbonate apatite deposition in the cervical spine with associated vertebral destruction. Case report.

This 52-year-old woman developed crystal deposition disease involving the cervical vertebrae. She presented with symptomatic spinal cord compression secondary to extensive calcified lesions in the posterior elements of the cervical spine. Surgical decompression with posterior fusion was performed. Histological examination showed hardened deposits of calcium carbonate involving the soft tissue, and dissolution of the vertebral bone trabeculae. There was no inflammatory response to these deposits. One year postoperatively the patient developed severe pulmonary disease associated with the collagen-vascular disorder, scleroderma (calcinosis, Raynaud's phenomenon, esophageal hypomotility, sclerodactyly, and telangiectasia [CREST] syndrome). Calcium carbonate deposition disease represents an unusual clinical entity that is possibly associated with scleroderma or other collagen-vascular diseases, and it is distinct from ligamentum flavum calcification, calcium pyrophosphate deposition disease, and hydroxyapatite deposition disease.

Apatites↗