There is no strict difference between fiber piles and casting piles in terms of indications, but the indications for fiber piles are broader than casting piles, for example, individual fine root canals and multiple root canals in different directions can be used. Fiber piles and cast piles are basically the same in root canal preparation, but there are differences. Casting piles have to consider the retention type and resistance type, that is, the length, thickness and shape of the root canal. The shape of the pile should be basically the same as the root shape, with a length of two-thirds or three-quarters of the root length and a thickness of one-third of the root thickness. Fiber piles are finished with a fixed thickness differentiated into different models. When preparing the root canal, use a special needle (the coarseness of the needle and the coarseness of the pile are matched) and consider only the length. Do not prepare too thick to avoid affecting the bonding. The difference between fiber pile and cast pile: 1, fiber pile has good aesthetic performance. 2. Good biocompatibility. 3. The modulus of elasticity is close to the tooth, so it is not easy to occur root fracture. 4. X-rays are not blocked and do not affect C-T examination and MRI examination. 5, Outpatient direct fabrication, reduce the number of patient follow-up. 6, good bonding performance with the dentition is not easy to fall off. 7, deficiency point, high cost.