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Updated: May 14, 2026
Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
Published on: August 5, 2021
Application of two segmentation protocols during the processing of virtual images in rapid prototyping: ex vivo study
Eduardo Gomes Ferraz1, Lucio Costa Safira Andrade, Aline Rode dos Santos
1School of Dentistry, Federal University of Bahia, Avenida Araújo Pinho, n. 62 Canela, 41110-150, Salvador, Bahia, Brazil, ed_ferraz@yahoo.com.br.
Objectives:
The aim of this study was to evaluate the accuracy of virtual three-dimensional (3D) reconstructions of human dry mandibles, produced from two segmentation protocols ("outline only" and "all-boundary lines").
Materials And Methods:
Twenty virtual three-dimensional (3D) images were built from computed tomography exam (CT) of 10 dry mandibles, in which linear measurements between anatomical landmarks were obtained and compared to an error probability of 5 %.
Results:
The results showed no statistically significant difference among the dry mandibles and the virtual 3D reconstructions produced from segmentation protocols tested (p = 0,24).
Conclusions:
During the designing of a virtual 3D reconstruction, both "outline only" and "all-boundary lines" segmentation protocols can be used.
Clinical Relevance:
Virtual processing of CT images is the most complex stage during the manufacture of the biomodel. Establishing a better protocol during this phase allows the construction of a biomodel with characteristics that are closer to the original anatomical structures. This is essential to ensure a correct preoperative planning and a suitable treatment.
