With the development of dentistry and the improvement of restorative technology, the methods of preserving and restoring residual crowns and roots have been developed and updated. Patients and doctors are increasingly aware of the preservation of the affected teeth, and the number of cases of restoration of residual crowns and roots in the clinic is increasing, and patients have higher requirements for the aesthetics, functional recovery, and long-term restorative effects of the restoration. The conventional restorative treatment of residual crowns and roots is based on the perfection of root canal treatment and the use of filling, inlay, partial crown, full crown and pile crown to repair the defect of the affected tooth. The pile crown restoration is done by using pile cores to fix and restore the inner core of the defective crown in the root canal to strengthen the resistance and retention of the tooth to prevent fracture of the abutment and dislocation of the restoration, and then using crowns to restore the shape of the affected tooth. There are many types of pile cores used clinically, including preformed metal piles, cast metal piles, ceramic piles, fiber piles, etc. Cast metal pile cores have always occupied a major position in clinical practice, but they have many drawbacks, their elastic modulus is higher than that of dentin, which can produce stress concentration in the root canal and thus produce severe root fracture, and they are prone to corrosion, poor aesthetic properties, etc. A few patients have allergic symptoms. As well as the phenomenon of blurred MRI images of the head and neck due to oral metal materials, more and more doctors and patients are becoming aware that the use of metal in fixed restorations should be gradually reduced. In recent years, along with the progress of fiber-reinforced resin research, fiber piles have been widely used in clinical practice, which have good properties not found in single materials, such as corrosion resistance, high strength, fatigue resistance, high electrical insulation and excellent biocompatibility. The combined application of fiber piles and composite resin cores and crown restorations makes up for the lack of metal pile cores. Zheng Xiang, Stomatology Center, Henan Provincial People’s Hospital