Dimensional and formation analysis of a restorative ceramic and how it works.
In-Ceram ceramic appears to use conventional powder/liquid processing techniques to form the coping substructure; however, the process results in a near net-shape restoration with minimal sintering shrinkage. Scanning electron microscopy, Brunauer-Emmett-Teller analysis, particle size classification, and linear dimensional changes during sintering were used to analyze In-Ceram ceramic. In-Ceram ceramic had a minimal linear shrinkage of 0.21% after the sintering of the alumina powder. This shrinkage can be readily compensated for by the expansion of conventional gypsum products and should result in acceptable clinical fits for In-Ceram ceramic restorations. Theories and explanations were described to account for the near net-shape and high strength of In-Ceram. Continuous interpenetrating phase composite technologies were used to create a substantial increase in strength. Future applications of this technology are encouraging.
Campbell
S D
SD
Department of Restorative Dentistry, University of Illinois at Chicago, USA.
Pelletier
L B
LB
Pober
R L
RL
Giordano
R A
RA
D000537:Aluminum Oxide / Q000737:chemistry*; D003442:Crowns; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry*; D017267:Dental Prosthesis Design; D006801:Humans; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D016062:Porosity; D013499:Surface Properties
D003776:Dental Porcelain; C070870:In-Ceram; D000537:Aluminum Oxide