Article:

Considering anterior substructure designs for lithium disilicate crowns, a hybrid substructure design that supports a cusp to fossa anterior guidance relationships can increase the strength of the ceramic system without having to compromise the esthetic integrity of the crown. Refractive index values increase when the substructure thickens. Increasing the thickness of the substructure results in a crown of higher value. Acknowledging the individual strengths and weaknesses of the components of the biphase lithium disilicate porcelain system, it is possible to engineer structural stabilization factors in all ceramic crown design that will increase strength functions and at the same time not sacrifice the esthetic beauty desired in all ceramic crowns.