Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 18154 Creature Body Part, Dragon Head Lower Jaw with Spikes and Teeth [Plain] this part is a print of it
• 18153pr0001 Creature Body Part, Dragon Head Upper Jaw with Spikes with Tan Teeth and Orange Eyes Print Pair of this part