Three-dimensional printing and computer-Assisted surgery demand a high-precision three-dimensional mesh model created from computed tomography (CT) imaging data using an image-based meshing algorithm. We aimed to evaluate the threedimensional geometric accuracy of surface meshes produced from CT images with commercially available software packages. Methods: The CT images were acquired for 3 human dry skulls and 10 manufactured plastic skulls. Four commercially available software packages were used to produce the surface meshes in stereolithography (STL) file format. These CT-based STL surface meshes were registered and compared with three-dimensional opticalscanned reference mesh surface for evaluating the accuracy of the STL mesh produced with each software package. Results: The surface geometries produced by the CT-image-based meshing process were all relatively accurate; differences from the three-dimensional optical-scanned data were in the voxel or subvoxel range. However, when comparisons with the three-dimensional optical-scanned surface data were performed in individual anatomic regions, we found significantly different accuracies of the CT-based STL surface meshes produced by the different software packages. Conclusions:We found that all 4 software packages showed reasonably good meshing accuracies for clinical use. However, the range of errors inherent in the CT-image-based meshing process demands that caution should be taken in selecting and manipulating the software to avoid potential errors in specific clinical applications.
Bibliographical noteFunding Information:
From the *Department of Oral and Maxillofacial Surgery, National Health Insurance Service, Ilsan Hospital, Goyang-si, Republic of Korea; †De-partment of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea; ‡Department of Oral Maxillofacial Surgery, Stomatological Hospital of Guangzhou Medical College, Guangzhou, China. Received September 12, 2013. Accepted for publication June 13, 2014. Address correspondence and reprint requests to Sang-Hwy Lee, DDS, PhD, Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea; E-mail: firstname.lastname@example.org Supported by the National Research Foundation of Korea grant funded by the Korean government (2012R1A1A2003829) for L.S.H. The authors report no conflicts of interest. Copyright © 2014 by Mutaz B. Habal, MD ISSN: 1049-2275 DOI: 10.1097/SCS.0000000000001139
Supported by the National Research Foundation of Korea grant funded by the Korean government (2012R1A1A2003829) for L.S.H.
© 2014 by Mutaz B. Habal, MD.
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