Dental crown

A dental prosthetic device adapted to be seated upon and anchored to an exposed tooth preparation comprising

• an inner core formed of a ceramic material,
• an outer jacket joined to said core and formed of polyceramic material, and
• layer structure, including silane, disposed intermediate said core and said jacket, and forming a joining interface between the two.

A dental prosthetic device adapted to be seated upon and anchored to an exposed tooth preparation comprising

• an outer jacket formed of a polyceramic material and having an inside cavity, and
• joinder structure having an outside surface expanse that is joined by bonding to said jacket within its said inside cavity, and an inside cavity having an inside surface expanse which is joinable by cementing to such an exposed tooth preparation.

A dental prosthetic device adapted to be seated upon and anchored to an exposed tooth preparation which includes a base with an outside surface, a stump joined to and projecting from said base, and a shoulder extending between said base's said outside surface and said stump in the region of joinder between the two, said device comprising

• a core seatable essentially directly on such a stump, and including a lower extremity portion which, with the core seated on such a stump, resides in a condition spaced from the associated tooth-preparation shoulder, and
• a jacket anchored to the outside of said core, and including a lower extremity portion which, with the device in place on a tooth preparation, extends into the space existing between the tooth preparation's shoulder and the lower extremity portion of said core, and contacts the tooth preparation's stump in the vicinity of that space.