While not typical, it is possible to have baby teeth at 17.
According to research, baby teeth usually fall out in childhood. However, some people retain one or more baby teeth into adulthood. These retained baby teeth may not cause any issues, but they can lead to aesthetic concerns, gaps, or chewing difficulties. As stated in the research, "Baby teeth in adults cause very few issues for some people. However, they may cause aesthetic issues, gaps to form, or difficulties with chewing. If the baby tooth causes no problems, a person may decide to keep it."
Therefore, having a baby tooth at 17 is not the norm, but it is also not necessarily a cause for concern unless problems arise.
