The name of the last tooth varies depending on whether or not the wisdom teeth have come in. If the wisdom teeth have not come in or have been extracted, the last tooth is called the second molar, and if the wisdom teeth have come in, it is called the third molar (wisdom tooth).
Second molar: For people who were born with or had their teeth extracted without a third molar (wisdom tooth germ), the last tooth is the seventh tooth counting from the midline (e.g., the line between the two incisors) toward the distal center (toward the buccal side), which is also known as the second molar.
Third Molar (Wisdom Teeth): In people who have not had a tooth extracted and have a third molar (wisdom tooth) germ, the last tooth is usually called a third molar (wisdom tooth).
However, some people have irregular development, i.e., only the left or only the right side has a third molar (wisdom tooth) germ, which is more complicated and needs to be determined by radiographs at the hospital.
To summarize, the name of the last tooth varies from person to person, and should be diagnosed on an individual basis in the hospital.