Influence of supporting teeth quantity of surgical guide on the accuracy of the immediate implant in the maxillary central incisor: An in vitro study

Introduction: Static computer-assisted implant surgery (sCAIS) aims to enhance precision by guiding the drill during the procedure. The quantity and morphology of supporting teeth influence the accuracy of sCAIS. Aims : To investigate how the number of supporting teeth affects the accuracy of immediate implant surgery in the maxillary central incisor. Methods: Twenty-eight upper jaw models, simulating immediate post-extraction sockets of tooth 11, were divided into two groups based on the number of supporting teeth (four or six). Cone beam computed tomography and intraoral scans determined the implant positions, guiding the fabrication of surgical guides and evaluating discrepancies in the planned and actual implant placements, particularly in terms of three-dimensional at the implant platform and apex and angular deviations. Results: The group with six teeth support had significant differences in angular deviation (3.59 ± 0.97 and 4.63 ± 0.71) and implant apex deviation (1.40 ± 0.27 and 2.08 ± 0.21) values compared to the group with four teeth support. Although other discrepancy variables in the six teeth-supported group exhibited lower values, they did not show statistically significant differences compared to the four teeth-supported group. Conclusion: The number of supporting teeth may influence the accuracy of sCAIS in immediate implant surgery in the aesthetic dental region. Both groups showed acceptable clinical accuracy, but the surgical guide supported by six teeth may enhance implant accuracy compared to four.