Orthodontic, prosthodontic, full denture, and implant occlusions all have their own treatment concepts, but the humans, in whose mouths these treatments are conducted, do not change. Modern theories of dental occlusion require a change from CR and CO to a more inclusive head, face, and neck functional assessment, taking into account head and body posture. Knowledge of anatomy, neurology, and physiology and an understanding of three-dimensional maxillomandibular jaw positions that would be functional in normal jaw movements and parafunctional during sleep has become essential for the dentist to assess. We are now seeing TMD and sleep apnea patients in greater numbers. Dental occlusion is “not just the teeth”.