Application of two segmentation protocols during the processing of virtual images in rapid prototyping: ex vivo study with human dry mandibles

作者：Ferraz Eduardo Gomes; Safira Andrade Lucio Costa; dos Santos Aline Rode; Torregrossa Vinicius Rabelo; Fischer Rubira Bullen Izabel Regina; Sarmento Viviane Almeida^*

来源：Clinical Oral Investigations, 2013, 17(9): 2113-2118.

DOI：10.1007/s00784-013-0921-7

• X-ray computed tomography
• Computer-assisted image processing
• Three-dimensional imaging
• Rapid prototyping

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").
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 %.
The results showed no statistically significant difference among the dry mandibles and the virtual 3D reconstructions produced from segmentation protocols tested (p = 0,24).
During the designing of a virtual 3D reconstruction, both "outline only" and "all-boundary lines" segmentation protocols can be used.
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.

• 出版日期2013-12