Micro endodontics refers to a specialized field within endodontics that focuses on the use of high magnification and specialized instruments to treat root canal systems that are small or difficult to access. The use of microendodontic techniques can allow for better visualization, access, and cleaning of the root canal system,leading to a higher success rate for endodontic treatment. This type of endodontic treatment can be used for both primary and retreatment cases, and can be particularly beneficial for teeth with complex root canal anatomy or calcified canals. Microendodontics requires specialized training and equipment, and is usually performed by an endodontist or a general dentist with advanced training in this area.