Methods for making layered dental appliances from the outside in

A method for making a layered dental appliance, the method comprising:

• providing a mold comprising a negative of an outer shape of the layered dental appliance;
• positioning a slurry in the mold, forming a first layer of the layered dental appliance, the slurry comprising:
• (i) at least one of a glass powder and a glass ceramic powder, present in an amount of about 60 wt.-% to about 85 wt.-%,
• (ii) a liquid, and
• (iii) an inorganic binder precursor;
• providing a solid structure comprising a positive shape of a second layer of the layered dental appliance, wherein the solid structure includes a stamp;
• pressing the solid structure into the slurry in the mold;
• and
• removing the solid structure from the slurry to form a cavity comprising a negative of the second layer in the slurry.