[The influence of porcelain thickness and non-uniformity on porcelain cracks in implant-supported metal-porcelain fixed bridge].
This experiment studied the influence of porcelain thickness and non-uniformity on porcelain crack in implant-supported metal-porcelain fixed bridge. The result indicated that porcelain crack began to appear when the body porcelain powder was 3-5 mm in thickness; more cracks took place when the powder thickness increased by 1 mm to 2 mm on the axial surface in the axial direction; cracks became serious when the thickness suddenly changed to zero; and connectors were liable to cracks. Therefore, in designing and fabrication, one should avoid and sudden change in the shapes of the connector and the porcelain on it, any sudden change in the thickness of porcelain and a thickness of porcelain powder not less than 3.5 mm. Other-wise, it is neccessary to use internal crown between metal base and abutment to meet the demands.
Liang
X
X
Department of Prosthodontics, School of Stomatology, Chengdu.
Wang
H
H
Chao
Y
Y
Kuang
X
X
D003776:Dental Porcelain; D003830:Denture, Partial, Fixed
D003776:Dental Porcelain