Quantification and visualization of alveolar bone resorption from 3D dental CT images

Abstract

Purpose A computer aided diagnosis (CAD) system for quantifying and visualizing alveolar bone resorption caused by periodontitis was developed based on three-dimensional (3D) image processing of dental CT images. Methods The proposed system enables visualization and quantification of resorption of alveolar bone surrounding and between the roots of teeth. It has the following functions: (1) vertical measurement of the depth of resorption surrounding the tooth in 3D images, avoiding physical obstruction;(2) quantification of the amount of resorption in the furcation area; and (3) visualization of quantification results by pseudo-color maps, graphs, and motion pictures. The resorption measurement accuracy in the area surrounding teeth was evaluated by comparing with dentist's recognition on five real patient CT images, giving average absolute difference of 0.87 mm. An artificial image with mathematical truth was also used for measurement evaluation. Results The average absolute difference was 0.36 and 0.10 mm for surrounding and furcation areas, respectively. The system provides an intuitive presentation of the measurement results. Conclusion Computer aided diagnosis of 3D dental CT scans is feasible and the technique is a promising new tool for the quantitative evaluation of periodontal bone loss.

In Vivo Evaluation of Two‐Piece Implants Placed Following One‐Stage and Two‐Stage Surgical Protocol in Posterior Mandibular Region. Assessment of Alterations in Crestal Bone Level

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3D Printing and Digital Processing Techniques in Dentistry: A Review of Literature

“…It is reported that the technology has been used for maxillofacial and implant procedures such as maxillary‐sinus augmentation preciously high precision . In addition, with the guidance of sinus augmentation procedures, the present method is similar to the guided bone‐grafting and bone‐reconstructive surgery for the purpose of lowering mental navigation and replacing the conventional surgical methods …”

“…By comparing the recognition of CT images of real patients by dentists and taking into account the absolute difference of 0.87 mm average, the resorption measurement accuracy of the surrounding area of teeth can be assessed. Artificial images with mathematical authenticity can also be applied for measurement and evaluation …”