What materials were used to make Western dentures?

Western dentures in the 17th to 18th centuries were made by carving ivory, hippopotamus teeth and animal bones. Denture making was conducted by ivory craftsmen, goldsmiths and silversmiths, and quacks.
Around 1790 the method of making a denture by baking porcelain was invented in France. At companies, such as Wedgewood, 12 thousand porcelain dentures were made until 1804. They did not fit the chin as they shrink when burnt. The rear of a porcelain denture was flipped up by a spring so that it may not fall. Upper-class ladies would wear porcelain dentures to make their mouth look neat.

Illustration:Porcelain dentures in the 19th century