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Does crystallization cause a break in the structure of biactive glasses? 


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Crystallization in bioactive glasses can cause a break in their structure . The composition of the glass plays a significant role in determining the crystallization tendency . Glasses with higher alkali oxide content have a lower crystallization temperature, while glasses with low alkali oxide content tend to form crystals at higher temperatures . The primary crystalline phases formed during crystallization are sodium calcium silicate and wollastonite . Glasses with sodium calcium silicate crystallization have high bioactivity but are sensitive to high temperature processing, while glasses with wollastonite crystallization have better stability at working temperatures . Crystallization should be avoided as it can retard dissolution, bioactivity reactions, and complicate the manufacturing process of bioactive glass products such as fibers and porous implants .

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01 Jan 1994
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The provided paper does not mention anything about biactive glasses or the effect of crystallization on their structure.
The provided paper does not mention anything about biactive glasses or the effect of crystallization on their structure.
The paper does not directly mention whether crystallization causes a break in the structure of bioactive glasses.
The provided paper does not directly address the question of whether crystallization causes a break in the structure of biactive glasses.
The paper does not explicitly mention whether crystallization causes a break in the structure of bioactive glasses.

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ISO-10993-5 bioactive glass5 answersBioactive glasses are mentioned in multiple abstracts. Deng et al. discuss aluminoborate and alumino-borosilicate glass compositions with solid or hollow microspheres for use in bioactive applications and wound healing. Hill et al. describe a bioactive glass composition containing SiO2, P2O5, and fluoride, which can be used in dental applications such as toothpaste. Rao and Ravindranadh mention bioactive glasses as novel dental materials composed of calcium and phosphate, similar to bone hydroxyapatite, with a wide range of applications including bone grafts. Sun et al. provide a method for manufacturing crystallized glass using a bioactive glass composition containing CaO, SiO2, P2O5, MgO, and CaF2, with various additives to control bio-activation and other properties. Unfortunately, none of the abstracts specifically mention ISO-10993-5, so further research may be needed to find information on bioactive glass in relation to this standard.
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