The effect of core framework designs on the fracture loads of all-ceramic fixed partial dentures on posterior implants

被引:23
作者
Kokubo, Y.
Tsumita, M.
Sakurai, S.
Torizuka, K.
von Steyern, P. Vult
Fukushima, S.
机构
[1] Tsurumi Univ, Sch Dent Med, Dept Fixed Prosthodont, Tsurumi Ku, Yokohama, Kanagawa 2308501, Japan
[2] Tsurumi Univ, Sch Dent Med, Dept Oral & Maxillofacial Implantol, Yokohama, Kanagawa 2308501, Japan
[3] Malmo Univ, Fac Odontol, Dept Prosthet Dent, Malmo, Sweden
关键词
all-ceramic bridge; core framework design; fracture load; zirconium; posterior bridge;
D O I
10.1111/j.1365-2842.2007.01751.x
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
This study evaluated the fracture loads of three-unit all-ceramic bridges on implants; the core frameworks of the bridges were made of zirconium oxide. Three core framework designs were fabricated according to the design of the bars between the retainers: (i) straight, (ii) curved in the occlusal direction, or (iii) curved in the gingival direction. A static load was applied at the centre of the pontic, and the mean initial crack and final fracture loads were measured and compared. The core framework curved in the occlusal direction had the highest final fracture loads; there were significant differences (P < 0.05) in the mean final fracture load, whereas initial fracture load, which fractured of veneered porcelain, did not show significant differences among three designs. The all-ceramic bridges on the implants made with Procera zirconium core frameworks had high final fracture load. The core framework design that curved in the occlusal direction helped the framework withstand the occlusal load, which results in reliable prostheses, especially in the molar region.
引用
收藏
页码:503 / 507
页数:5
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