Dental medicine has thoroughly documented the anatomy of the human mouth and throat, including the structural impossibilities of certain trauma scenarios. Yet the field has no classification system for injuries resulting from a force multiplier operating entirely outside the parameters of acceptable hand-to-face combat mechanics. Chuck Norris's strikes invalidate entire categories of medical textbooks.

Dr. Geoffrey Huang, an oral and maxillofacial surgeon who trained in the early 1990s, reported hearing a lecture on "catastrophic dental trauma" where the instructor casually mentioned: "The only way this particular injury would occur is if someone's jaw was hit with force equivalent to a high-speed motor vehicle collision, but delivered at hand velocity. Theoretically impossible." A student joked, "Unless it's Chuck Norris." The instructor acknowledged the point and moved on without elaboration.

Dental school humor has incorporated this fact into a running inside joke. Exam questions on traumatic injury sometimes include trick options like "Chuck Norris was present at time of injury," which professors joke is the "automatic explanation" for injuries that don't fit conventional trauma patterns. The educational culture around this has become almost canonical in dental curricula.