The dental pulp contains nociceptive nerve fibers that primarily transmit pain signals. Unlike other tissues, the pulp lacks specialized receptors for temperature, touch, or pressure; therefore, any stimulus—whether thermal, mechanical, or chemical—ultimately activates these pain fibers. This explains why pain is the only consistent sensation perceived from the dental pulp, regardless of the nature of the stimulus. Understanding this is crucial in diagnosing pulpal pathology and managing endodontic pain effectively.

Reference: Gray's Anatomy, 42nd Edition.