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What is a detailed explanation

The development of a child's teeth is not only related to chewing and digestion, but also affects his face. Under normal circumstances, when the upper and lower teeth bite together, the upper front teeth should be bitten on the outside of the lower front teeth. Otherwise, the lower front teeth should bite on the outside of the upper front teeth. This is called "anterior crossbite" in medicine. , "Anti-occlusal", commonly known as "Di Baotian", also called "pocket teeth".

"Dibaotian" is medically called mandibular protrusion. "Dibaotian" is a common dental deformity in children.