Subgingival scraping is a very important step in the treatment of periodontitis and is a very good and necessary treatment to eliminate bacteria from periodontal pockets. The harm can be negligible, but some damage can occur because when the root surface is treated, some of the tissue is scraped off the root surface. Since some of the bacteria have penetrated into the root surface, some of the tissue on the root surface is treated by scraping, along with the bacteria inside, which can cause some damage to the root surface, but it is negligible. The damage to the root surface is not harmless, but it is minimal and negligible compared to the benefits of subgingival scaling. Subgingival scraping can now be performed with the help of more advanced instruments, such as ultrasound or endoscopy, which are targeted under direct vision and can see the calculus in a precise location with minimal trauma through ultrasound instruments. Only the calculus is removed and the damage to the root surface can be minimized, so you do not have to worry, the harm of subgingival scraping is basically absent.