Investigation of a new 3Y-stabilized zirconia with an improved optical property for applications as a dental ceramic
To study the mechanical and optical properties of. a new nanocrystalline yttria-stabilized zirconia (PX242A Tosoh Japan). The influence of heating rates on its properties and its potential use as a dental ceramic were also evaluated. Samples of PX242A were divided into 4 groups according to heating rates: group H1 (l00oKh-1); group H2 (200°Kh-1); group H4 (400° Kh-1); group H6 (600°Kh-1). Group HO (3Y-SBE Tosoh Japan) was made according to the manufacturers recommendation as a control. The contrast ratio (CR), transparency parameter (TP) and total transmittance (TT) were measured by an Xrite spectrophotometer. The flexural strength and fracture toughness were also evaluated. The flexural strength and fracture toughness were found to be independent of the heating rate while the optical properties significantly increased when the heating rates were 600oKh-1, 200° Kh-1 and 400°Kh-1 but were not significantly different with l00Kh-1. A heating rate of 600oKh-1 is suggested as a time efficiency protocol, because it could provide desirable mechanical and optical properties, making zirconia suitable for clinical use.
Heating rate Transparency Ceramic Mechanical property Zirconia.
Yufaua Wang Hui Huang Limin Gao Fuqiang Zhang
Department of Prosthodontics, The Ninth People Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao long University School of Medicine, Shanghai 200011, PR China
国际会议
上海
英文
385-388
2011-12-28（万方平台首次上网日期，不代表论文的发表时间）