A Nitinol ice blade includes a blade body having attachment structure by which it is held in a blade holder of an ice travel device, such as an ice skate or ice boat. More particularly, disclosed is an oral composition comprising palatinit which exerts a synergistic effect when combined with a fluorine or zinc compound. A first entropy of values of the fingerprints conditional on values of a first parameter is determined, and a second entropy of values of the first parameter conditional on values of the fingerprints is determined.