第１３６回生材研(IBB)セミナー
日時
平成24年2月13日（月）15:00～16:30
開催場所
生材研第一会議室（３階）
演題 １
Cure mechanisms in materials for use in esthetic dentistry
講師
Tae-Yub Kwon
Associate Professor of the Department of Dental Biomaterials, School of Dentistry, Kyungpook National University, Daegu, Korea
Associate Professor of the Department of Dental Biomaterials, School of Dentistry, Kyungpook National University, Daegu, Korea
概要
In comparison with common industrial procedures, curing methods employed for dental materials used in esthetic dentistry are relatively limited because of the need to polymerize in the oral cavity at ambient temperature within a short time. Heat-cure and self-cure dental resins utilize benzoyl peroxide initiator alone and together with tertiary amine coinitiator, respectively. At present, most dental restorative composites are camphorquinone/amine complex initiation, visible light-cured one-component systems; although alternative photoinitiators have been researched and developed. A multiple curing mode in a dual-cure material is a complex combination of various initiation systems. The use of aryl sulfinic acid sodium salt to overcome adverse chemical interactions occurring between some simplified adhesives and self- or dual-cure composites is based on another self-cure polymerization mechanism-sulfinic acid-initiated polymerization-proposed originally by Hagger in 1948. In the clinical situation, it is important for clinicians to try to optimize the degree of conversion of resin-based materials using proper manipulation and adequate light curing techniques that will ensure the best outcome possible for the materials used to restore teeth.
演題 ２
Alternative use of glass ionomer cement
講師
Luciana Mayumi Hirakata
Associate Professor of the Department of Prosthodontics, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Rio Grande do Sul, Brazil
Associate Professor of the Department of Prosthodontics, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Rio Grande do Sul, Brazil
概要
The glass ionomer cement (GIC) was developed by Wilson and Kent in the 70's. The GIC was proposed as a restorative material has the characteristic of fluoride release and adhesion to tooth (enamel and dentin) produced mainly by polyacrylic acid. Modifications are being made to improve the properties of this type of material and is currently used in procedures ranging from fissure sealing, undergoing curative such as restorative procedures mainly caused by erosion and abrasion, and even as luting agents. However, characteristics such as low solubility, high abrasion resistance and excellent biocompatibility, new formulations have been studied to expand its clinical application.
Taking advantage of the favorable biological response offered by the GIC, some attention turned to use as a biomaterial. In vivo studies have observed a bioactive behavior of the GIC, with osteoconduction properties, and also chemical bonding between the glass particles and calcium ions of the bone. Supported in their properties the use of glass ionomer cements may be a promising material for use as a bone grafts.
Taking advantage of the favorable biological response offered by the GIC, some attention turned to use as a biomaterial. In vivo studies have observed a bioactive behavior of the GIC, with osteoconduction properties, and also chemical bonding between the glass particles and calcium ions of the bone. Supported in their properties the use of glass ionomer cements may be a promising material for use as a bone grafts.
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