Root canal treatment often sounds complicated, but in reality, it is all about carefully cleaning and protecting a tooth so it can stay healthy for years. One of the tools that quietly plays a big role in this process is the rotary file. Most patients never see this tool, but dentists rely on it every day. Rotary files help make root canal treatment smoother, more accurate, and more comfortable for both the dentist and the patient. What Are Rotary Files? A rotary file is a small dental instrument used during root canal treatment. Its main job is to clean and shape the inside of the tooth once infected tissue has been removed. Unlike older hand files, rotary files are connected to a motor and move in a smooth, controlled rotation. Because they are made from flexible materials, rotary files can follow the natural shape of the root canal. This is important because canals are rarely straight and often curve in different directions. Why Dentists Use Rotary Files Cleaning a root canal by ha...