Abstract: Objective In this prospective study,the accuracy of computer assisted real-time navigation technology in dental implant surgery was calculated,which provided theoretical basis for the further improvement of the accuracy of minimally invasive implant surgery. Methods A according to the inclusion criteria,we enrolled a sample composed of patients who had computer assisted real-time navigation implants placed between June 2018 through December 2020 in Yantai Stomatological Hospital.The cone beam scan was taken and the intraoral scan was performed. The implants were placed by aid of the computer assisted real-time navigation software and the post-surgical CBCT was taken.The errors between the designed and the actually placed implants were measured to evaluate the accuracy and effectiveness.The pre-op virtual implant and the post-op actual implant were displayed in the same three-dimensional coordinate system.The errors of shoulder distance, root distance and angle of each implant were measured. The data was analysed by SPSS 22.0 software.The data in each group were expressed as mean±standard error(x±s).Independent sample t test was used to compare the measurements among the groups.The test level was a=0.05, P<0.05 was considered to have significant difference. Results Comparing the accuracy in maxillary and mandibular,the shoulder distance error was（0.59±0.16） mm and （0.63±0.19 ）mm,the root distance error was（0.75±0.14 ） mm and （0.70±0.18） mm,and the angle error was (3.46±1.80)°and (3.07±1.12)°respectively.Comparing the accuracy in anterior and posterior regions,the shoulder distance error was （0.60±0.21）mm and （0.60±0.16）mm,the root distance error was （0.72±0.16）mm and （0.72±0.15）mm, and the angle error was (3.28±1.85)°and (3.28±1.31)°respectively.Comparing the accuracy in flap and flapless, the shoulder distance error was （0.68±0.17）mm and （0.55±0.15）mm,the root distance error was （0.81±0.15）mm and （0.67±0.12）mm, and the angle error was (3.29±1.65)°and (3.35±1.58)°respectively. Conclusion The accuracy of computer-aided dynamic navigation system have no obvious deviation in shoulder distance, root distance and angle..

Key words: Dental implant, Real-time navigation, Computer assisted surgery, Accuracy