When individual back teeth are missing, the impact on pronunciation is not great, but when more teeth are missing, especially when the front teeth are missing or all teeth are missing, it can cause different degrees of pronunciation disorder, and the speech is both hard and unclear, because the tongue tip loses the original pronunciation positioning mark, and there is one less control gate in the route of airflow, so the pronunciation will be unclear and inaccurate, and it sounds like wind leakage, especially when pronouncing labiodental and lingual-dental sounds. The pronunciation will be unclear and inaccurate, sounding like a leak, especially when pronouncing labiodental and linguodental sounds. Language is an important function of the oral cavity, and teeth are the auxiliary organs of pronunciation. To speak and sing accurately, teeth are indispensable for accurate pronunciation, and teeth, tongue, lips and cheek muscles cooperate with each other to control the route and flow of airflow through the oral cavity, so as to make different sounds and different statements, and express various wishes and thoughts. Therefore, when teeth are missing, go to dentistry for restoration as soon as possible.