H files are a type of endodontic instrument used in dentistry for root canal treatment. They are long, thin, flexible, and have a tapered, helical design that allows them to navigate the curved canals of a tooth.
H files are used to clean and shape the root canal space before filling it with a filling material. They are used in a step-by-step manner, starting with the smallest size and working up to larger sizes until the desired shape and size of the canal is achieved.
The "H" in H files stands for Hedstrom, which is the name of the Swedish dentist who invented this type of instrument in the early 20th century. H files are made of stainless steel or nickel-titanium alloy, and come in different sizes and tapers to accommodate different canal shapes and sizes.
Proper use of H files requires skill and training, as they can cause damage to the tooth or surrounding tissue if used improperly. Therefore, root canal treatment should only be performed by a licensed and experienced dental professional.