Comparison of the CBCT CT 3D printing and CAD CAM milling options for the most accurate root form duplication required for the Root Analogue Implant RAI protocol

Abstract

Aim and Objective newlineTo access the accuracy of CBCT vs CT for fabrication of root newlineanalogue implant (RAI) and also to measure morphological discrepancy newlinebetween the 3D printed and the CAD-CAM milled RAI. To establish a newlinemethod for fabrication of RAI. newlineMaterials and Methods newlineThe study was an ex-vivo feasibility study comparing CBCT, CT, newlineCAD-CAM milling and 3D printing for acquiring the most accurate newlineduplication for root analogue implant (RAI). newlineThe teeth to be extracted were segmented from the DICOM files of newlineCBCT and CT scans of the patients and Standard Tessellation Language newlinefiles (STL) were obtained for individual teeth. The STL files of the individual newlineteeth obtained were printed and milled in polymethylmethacrylate material newline(PMMA). The study thus consisted of 5 groups namely Natural teeth as newlinecontrol, CBCT milled group, CT milled group, CBCT printed group and CT newlineprinted group and 16 samples per group. Morphological differences in the newlinethree dimensions namely apico-coronal, bucco-lingual and mesio-distal newlinebetween the natural tooth and the 3D replicas were assessed using the one newlineway ANOVA test using the statistical software. newlineResults newlineThere was no statistically significant difference among the newlinedimensions between the groups. However, it was observed that in newlineapico-coronal and bucco-lingual dimension, CBCTM group was closest to newlinethe natural group while in mesio-distal dimension, CBCTP group was newlineclosest to the natural tooth. newlineConclusion newlineWithin the limitations of this study, CBCT segmentation and Milling newlinetechnique produce the least distortion for fabricating the root analogue newlineimplant. However, the margin of error with the other methods was not newlinestatistically significant. newline