Derksen W, et al. - Researchers assessed computer guided implant surgery with tooth supported drill guides based on cone beam computer tomography scans and intraoral scanning. Prosthetic and surgical planning was completed in the guided surgery software (coDiagnostiX) for partially edentulous patients and drill guides were 3D-printed accordingly. Sixty-six patients received 145 Straumann tissue level implants eligible for accuracy analysis. It was noted that the mean angular deviation was 2.72° ± 1.42 and the mean three-dimensional deviation at the implant's entry point was 0.75 mm ± 0.34. According to this prospective cohort study, a feasible treatment option is guided surgery with tooth-supported drill guides made in a digital workflow. However, there are deviations and the length, location, cortical interference, and amount of unrestored teeth of the implant have a significant impact on the accuracy.