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Accuracy of Image‐Fusion Stereolithographic Guides: Mapping CT Data with Three‐Dimensional Optical Surface Scanning
Author(s) -
Widmann Gerlig,
Berggren Johannes Peter Michael,
Fischer Bastian,
PichlerDennhardt Albina Rosa,
Schullian Peter,
Bale Reto,
Puelacher Wolfgang
Publication year - 2015
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/cid.12313
Subject(s) - implant , radiography , materials science , biomedical engineering , nuclear medicine , medicine , surgery
Background Computer‐assisted implant surgery usually requires a radiographic scan template as the basis for prosthetic‐driven implant planning and surgical guide fabrication. Purpose The study aims to evaluate the accuracy of image‐fusion stereolithographic guides in which a computed tomography ( CT ) scan is mapped with three‐dimensional optical scans of cast and diagnostic wax‐up. Materials and Methods Three‐dimensional error at the base and tip of the implants, angular deviation of the implant‐axis, and the inserting‐depth error of 120 implants with a length of 10 mm and a caliber of 4.1 mm in 15 polymer‐models were examined. A control CT was performed and fused with the planning data for accuracy evaluation. Results The mean three‐dimensional error was 0.21 ± 0.10 mm (0.00–0.48 mm) at the implant base, 0.32 ± 0.17 mm (0.03–0.75 mm) at the implant tip, and the mean angular error was 0.85 ± 0.59° (0.00–2.50°). The mean depth error was 0.07 ± 0.07 mm (0.00–0.32 mm). Conclusions Within the limitations of an in vitro study, the novel technique showed excellent accuracy. Errors from fabrication and scanning of a radiographic scan template can be avoided, and the workflow and costs of computer‐assisted implant surgery may be reduced.