Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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Impact of the spatial orientation of the patient's head, metal artifact reduction, and tube current on cone-beam computed tomography artifact expression adjacent to a dental implant: A laboratory study using a simulated surgical guide

  • Matheus Barros-Costa (Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas) ;
  • Julia Ramos Barros-Candido (Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas) ;
  • Matheus Sampaio-Oliveira (Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas) ;
  • Deborah Queiroz Freitas (Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas) ;
  • Alexander Tadeu Sverzut (Division of Oral and Maxillofacial Surgery, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas) ;
  • Matheus L Oliveira (Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas)
  • Received : 2024.01.30
  • Accepted : 2024.04.05
  • Published : 2024.06.30
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Abstract

Purpose: The aim of this study was to evaluate image artifacts in the vicinity of dental implants in cone-beam computed tomography (CBCT) scans obtained with different spatial orientations, tube current levels, and metal artifact reduction algorithm (MAR) conditions. Materials and Methods: One dental implant and 2 tubes filled with a radiopaque solution were placed in the posterior region of a mandible using a surgical guide to ensure parallel alignment. CBCT scans were acquired with the mandible in 2 spatial orientations in relation to the X-ray projection plane (standard and modified) at 3 tube current levels: 5, 8, and 11 mA. CBCT scans were repeated without the implant and were reconstructed with and without MAR. The mean voxel and noise values of each tube were obtained and compared using multi-way analysis of variance and the Tukey test(α=0.05). Results: Mean voxel values were significantly higher and noise values were significantly lower in the modified orientation than in the standard orientation (P<0.05). MAR activation and tube current levels did not show significant differences in most cases of the modified spatial orientation and in the absence of the dental implant (P>0.05). Conclusion: Modifying the spatial orientation of the head increased brightness and reduced spatial orientation noise in adjacent regions of a dental implant, with no influence from the tube current level and MAR.

Keywords

Acknowledgement

In memoriam, the authors extend their deepest gratitude to Prof. Dr. Alexander Tadeu Sverzut for his invaluable contributions to this research.

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