great work you are an artist with creation ct the 6 posterior are full zircon?
you are milling in-house ?and have you a picture of occlusal view in order to see the junction between elements - my clients are angry with great bridge in zirconia
they think it will broken it' not strong enough
you can demonstrate with mathematics how silly that idea is.
the strength of zirconia is huge, it is the strongest material we have used in dental, ever. in a cross section, square-milimeter for square-milimeter it is not only higher than any other material for flexural and compressive strength, it is so at every dimension. that is to say increasing the cross sectional area increases strength in a non linear fashion.
there is a cross sectional area at which no amount of human force can be exerted to break the piece. you have to drop it off a building to see it crack let alone break.
cross sectionally, the connector strength can be so strong that the human bones will break before the zirconia will break.
on a piece like drizzt showed in the recent photo, if that was solid zirconia, it would take upwards of 6000 N of force in any area to begin exerting force enough to cause a crack. this is 600 kg of force in a single point.
if it breaks, the patient - without exception - got into a fight with a car. if not, someone's been grinding on it.