Yizhimei dynamic navigation-assisted implant surgery procedure
tooth
CAVITY
The Yizhimei computer-assisted dynamic navigation system (DHC-D12, Digital-health Care Co., Ltd., Suzhou, China) consists of a cart (including host, display, infrared tracking and positioning device, dynamic navigation system software), registration device, fixture device, reference board, and implant handpiece with locator and accessories. In addition, medical data including image progression and cast model scanning, preoperative planning, head models, and software for planning, calibration, and control are necessary to form the entire simulation system for surgery.A U-tube (Digital-health Care Co., Ltd., Suzhou, China) was mounted on the edentulous model with silicone impression material. The models were scanned with CBCT and imported into surgical planning software (Yizhimei, Digital-health Care Co., Ltd., Suzhou, China). Enter the dynamic navigation implant system for preoperative planning, enter the real-time navigation interface, select the implant handpiece and reference plate, the reference plate is fixed on the adjacent tooth or the opposite side of the same jaw. Six zirconia pits on the U-tube were identified by the navigation implant mobile drill, the point-to-point registration was performed by calculating the distance between the position and the reference point, to identify and locate the surgical area. Remove the U-tube after registration. According to the guidance of the dynamic navigation system, the planting cavity was prepared and the implants were implanted. During the operation, the surgical operator can selectively observe the surgical approach and various parameters of the surgical area from all directions in time. According to the instructions of the software, the implant site, angle and depth can be dynamically adjusted to ensure that the implant results conform to the design plan. Postoperative CBCT was performed. The architecture of the dynamic implant surgery was shown in Fig. 
Model implantation using dynamic implant surgery. (a) U-tube mounted on maxilla with impression material; (b)The registration process: short drill clicks any 6 small ball pits on the registration device to complete the registration information collection; (c) U-tube registration; (d) Schematic diagram of dynamic navigation system; (e) Implant insertion assisted with dynamic implant surgery; the handpiece and mandibular were tracked with stereo infrared light camera; Precise operation under the control of implantation point, angle and depth