Final answer:
The centric occlusion of a 5-year-old child is checked by observing the relationship of their upper and lower teeth when the jaws are closed in a normal bite, which is essential for proper oral function and the alignment of permanent teeth.
Step-by-step explanation:
The centric occlusion of a 5-year-old child is assessed by observing the relationship of upper and lower teeth when the jaws are closed in a normal bite. Centric occlusion, or maximum intercuspation, is the position where the teeth are occluded in the most interdigitated position, and it's an important aspect in the development of a child's dentition. It affects chewing, speech, and the long-term health of the child's dentition. Observing the centric occlusion in a young child is significant as their primary teeth set the foundation for the development of proper oral function and the positioning of permanent teeth.