"Permanent teeth" refers to the second set of teeth that grow in your mouth once you lose your baby teeth. These teeth are meant to stay with you for the rest of your life. Full definition
Cats and dogs, like people, have one set of baby teeth which are replaced by a set of permanent teeth at around 6 months of age. (morenapethospital.com)
In some cases, these problems persist when permanent teeth come in. (fitpregnancy.com)
Milk teeth buds have developed already and buds for permanent teeth are forming behind them. (pregnancy-baby.com)