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Create virtual dentoskeletal model by superimposing digital dental cast into cone-beam computed tomography scan

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Purpose

Many artifacts and obstacles associated with cone-beam computed tomography (CBCT) scan can obscure or distort the details of the teeth and occlusal surface, like distorted teeth, streak artifacts, noise, and some malocclusion cases with excessive overlapping between jaws cause decrease the interocclusal space, which can impact diagnosis and treatment planning, and the 3D reconstruction accuracy. Optimizing dental precision by Integrating CBCT scans with other imaging modalities, supply more information to enhance CBCT accuracy, mainly in dental areas with limited clarity.

Methods

Performing the Structure-from-Motion (SfM) photogrammetry method, using phone camera and photograph studio setup using simple hardware, to digitize the dental casts and obtain an accurate digital dental model. Using this digital dental model to enhance dental precision in the CBCT data by performing the superimposition process, using a surface-based registration method and integration process to create a virtual dentoskeletal model. Evaluate the accuracy and quality of the superimposition results using qualitative (visual inspection) and quantitative measures.

Results

The differences between the virtual dentoskeletal model and the reference CBCT model are calculating by the 3D Euclidean distance, the mean ± SD are 0.212 ± 0.169 mm and 0.26 ± 0.149 mm for the maxilla and mandible, respectively. The color-coded map shows that the two surfaces are similar, but the extremist values are concentrated in the dental region due to the presence of the noise in the reference model and the gingiva in the virtual dentoskeletal model.

Conclusions

The resulting virtual dentoskeletal model can be viewed and manipulated on a computer screen, allowing for a detailed analysis of the teeth and supporting structures. The 3D model generated by the SfM photogrammetry technique did well during the superimposition process, representing a reliable method for virtual-based processing such as orthognathic surgery planning and splint design.

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Availability of data and materials

All data generated or analyzed during the present study are included in this published article.

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Funding

The authors did not receive support from any organization for the submitted work.

Author information

Authors and Affiliations

  1. Biomedical Engineering Department, College of Engineering, Al-Nahrain University, Baghdad, Iraq

    Reem Shakir Mahmood & Sadiq Jafer Abbas Hamandi

  2. Medical City - Oral and Maxillofacial Surgery Department BDS, FICMS, HiDLM, MFDSRCPS (Glas.), FDCRCS (Eng), Baghdad, Iraq

    Akmam Hamdy Al-Mahdi

Authors
  1. Reem Shakir Mahmood
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  2. Sadiq Jafer Abbas Hamandi
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by RSM, SJH and AHA-M. The first draft of the manuscript was written by RSM, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Reem Shakir Mahmood.

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Conflict of interest

All authors declare that they have no conflicts of interest/competing interests.

Ethical approval

This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of the Department of Biomedical Engineering in Al-Nahrain University, College of Engineering. Number 1/2020.

Consent to participate/consent for publication

In the current study, all patient data were obtained from Shahid Ghazi Hospital, a teaching hospital in Baghdad/Iraq. It is essential to note that prior to enrolling in this study, all patients were required to provide their informed consent to participate and have their information published. The process of obtaining consent involved ensuring that patients were fully informed about the nature and purpose of the study, the potential risks and benefits, and the confidentiality of their data. By obtaining consent, the study adheres to ethical principles that prioritize patient autonomy, privacy, and the responsible handling of their information. This consent process underscores the commitment to conducting research in a respectful and transparent manner, with due consideration for the rights and welfare of the patients involved.

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Mahmood, R.S., Hamandi, S.J.A. & Al-Mahdi, A.H. Create virtual dentoskeletal model by superimposing digital dental cast into cone-beam computed tomography scan. Int J CARS 19, 1855–1864 (2024). https://doi.org/10.1007/s11548-024-03111-4

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  • DOI: https://doi.org/10.1007/s11548-024-03111-4

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