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Effect of glass ceramic and titanium implants on primary calcification during rat tibial bone healing

Calcified Tissue International, ISSN: 0171-967X, Vol: 49, Issue: 5, Page: 359-364
1991
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Article Description

The effect of bone bonding (KG Cera, Mina 13, and titanium) and nonbone bonding (KGy-213, M 8/1) implants on primary calcification in endosteal bone was examined by comparing changes in the morphometry of matrix vesicles to those occurring during normal bone healing following ablation of rat tibial marrow. The concentration of matrix vesicles, their diameter, and their distance from the calcification front were determined using computerized cytomorphometry at the transmission electron microscopic level. The results demonstrated that bone bonding materials supported an increase in matrix vesicle concentration when compared with control bone at 6 and 14 days postimplantation. At 14 days, there were fewer matrix vesicles in the bone adjacent to the nonbonding implants. Though matrix vesicle diameter decreased in the control bone between 6 and 14 days, it increased in all of the experimental samples. Diameters were significantly greater in the bone bonding samples at 14 days and significantly lower in the nonbonding samples at 6 days. Distance from the calcification front decreased between 6 and 14 days in all groups except in bone adjacent to the KGy-213 implants. In bone adjacent to the bone bonding implants, distance from the calcification front was comparable to or further than that of control bone; in the nonbonding samples it was closer to the calcification front. These results demonstrate that production and maturation of matrix vesicles is influenced in a differential manner by the presence of implant materials. © 1991 Springer-Verlag New York Inc.

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