Influence of glass composition on the properties of glass polyalkenoate cements. Part IV: influence of fluorine content

Citation
Sg. Griffin et Rg. Hill, Influence of glass composition on the properties of glass polyalkenoate cements. Part IV: influence of fluorine content, BIOMATERIAL, 21(7), 2000, pp. 693-698
Citations number
29
Categorie Soggetti
Multidisciplinary
Journal title
BIOMATERIALS
ISSN journal
01429612 → ACNP
Volume
21
Issue
7
Year of publication
2000
Pages
693 - 698
Database
ISI
SICI code
0142-9612(200004)21:7<693:IOGCOT>2.0.ZU;2-U
Abstract
The influence of fluorine content of the glass in a series of glasses based on: 4.5SiO(2)-3.0Al(2)O(3)-1.5P(2)O(5)-(5.0-X)CaO-XCaF2 was investigated o n their cement formation with poly(acrylic acid). Increasing the fluorine c ontent of the glass was found to reduce the glass transition temperature, a s a result of fluorine replacing bridging oxygens by non-bridging fluorines . Working and setting times of the cement pastes reduced with increasing fl uorine content of the glass. Compressive strength and Young's moduli increa sed with fluorine content initially and then remained approximately constan t. Fracture toughness, toughness and un-notched fracture strength were not significantly influenced by fluorine content. The results are consistent wi th fluorine simultaneously disrupting the glass network and reducing the ba sicity of the glass. (C) 2000 Elsevier Science Ltd. All rights reserved.