Factors influencing transfer accuracy of cone beam CT‐derived template‐based implant placement

Abstract

CBCT-derived laboratory-based surgical templates enabled an implant placement in the cancellous maxilla as well as flapless procedures without compromising the transfer accuracy. The number and distribution of the remaining teeth as well as the number of sleeve-guided implant site preparation steps influenced the extent of deviation that can be achieved in partial edentulism.

A randomized controlled study on the accuracy of free‐handed, pilot‐drill guided and fully guided implant surgery in partially edentulous patients

“…Several studies have been published on the possible sources of error in guided surgery (Behneke et al, 2012;Sicilia, Botticelli, & Working, 2012;Vercruyssen, Hultin et al, 2014). The fact that all patients had been treated by one experienced clinician may therefore affect the external validity of our findings.…”

Technical Accuracy of Printed Surgical Templates for Guided Implant Surgery with the coDiagnostiXTM Software

“…Taking all these cumulative inaccuracies into account (approximately 0.3 mm when adding all above mentioned variances), the presently measured sleeve deviations seem to be rather small. However, in clinical application additional sources of inaccuracies such as the intraoral fit of the template, radiographical inaccuracies, and patient‐ or operator‐related inaccuracies have to be accounted for . Applying the tangential function on the mean angular deviation of 1.5 and calculating the resulting theoretical inaccuracy with a 10 mm implant inserted through a 5 mm long sleeve with a distance of 4 mm to the implant shoulder would result in a mean apical deviation of 0.49 mm.…”

Guided access cavity preparation using cone‐beam computed tomography and optical surface scans – an ex vivo study

“…However, the accuracy has been found to be deficient (Kalt & Gehrke , Behneke et al . ). More recently, the combined use of CBCT and optical scans of the region of interest may have the potential to improve the precision of guided drilling procedures using computerized numerically controlled (CNC) technology for guide rail production.…”