Final answer:
C fibers are related to dull pain, and A-delta fibers to sharp pain; no increased sensitivity suggests no endodontic relation.
Step-by-step explanation:
The query relates to the types of nerve fibers associated with different qualities of pain. C fibers are associated with dull pain, while A-delta fibers are typically associated with sharp pain. If there is no increased sensitivity to stimulus, it suggests that there is no relationship to endodontic issues.