The dynamic navigation system (DNS) is an auxiliary system for dental implant surgery that utilizes precise infrared positioning technology through the visualized operation of 3D digital images. The system is aimed at realizing the precise fusion of 3D images and actual anatomical positions and achieving the real-time tracking of surgical instruments. The DNS is suitable for preoperative planning and precise intraoperative guidance for dental implant surgery. The key factor that affects the accuracy of the DNS is the accurate registration of the actual anatomical structure of the operation area and its virtual 3D digital image. The indications, registration characteristics, and registration accuracies with different registration methods vary. The present work introduces the registration methods used in clinical practice, including bone marker registration, occlusal splint registration, U-tube registration, facial frame registration, anatomical mark registration, and unmarked registration. The factors affecting registration errors are also summarized to enable clinicians to effectively understand the characteristics and indications of different registration methods, reduce registration errors, and achieve accurate implantation.
