Discuss : Wear characteristic of zirconia and lithium disilicate fixed prosthesis in bruxism patient.

Literature review of an in vitro study testing the wear characteristic of zirconia and lithium disilicate fixed prosthesis opposing natural enamel, Zirconia and lithium disilicate in patient with bruxism
Materials to be tested (the new GC Ceramics(company )
Control group (natural enamel, Ivoclar porcelain system( IPS emax press, IPS CAD,IPS Emax zir CAD )