The hard palate is made up the palantine processes of the the maxillae (paired bones)--3/4 of the hard palate--and the horizontal plate of the palantine bone--the remaining 1/4. So I guess that makes 3 bones?
maxillary tuberosity
maxilla and palatine bone
The palatine bone is the posterior bone of the hard pallet. that doesnt help....
Palatine.
the palantine bone