It is not that stitches are not necessary for tooth extraction, but there is no need for stitches for general tooth extraction. The specific stitches are mainly based on the size of the extraction wound, and a round extraction wound will be left after the conventional tooth extraction. The wound will heal gradually and there will be no significant bleeding. Moreover, the extraction wound itself is located inside the mouth and will not have any effect on the aesthetics, so there is no need for stitches for this type of ordinary tooth extraction. If the extraction of wisdom teeth is more traumatic, involving incision, flap, bone removal, etc., this kind of more traumatic extraction definitely needs stitches.