Registration area and accuracy when integrating laser-scanned and maxillofacial cone-beam computed tomography images

Sun, L.; Hwang, Hyeon-Shik; Lee, Kyungmin Clara

doi:10.1016/j.ajodo.2017.06.027

Cited by 23 publications

(13 citation statements)

References 28 publications

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“…These artifacts may in uence the accuracy of integration when superimposing the CBCT and intraoral scans. As CBCT image is incapable of accurately representing occlusion, in particular, the occlusal surface in dental images 7 , replacing the dental part of a CT image with an intact dental image is essential for accurate fabrication of 3D tooth models 8,9 . In this report, our method rst fabricated the tooth models at pretreatment by merging CBCT and intraoral scanned crown at pretreatment and then, this was used for sequential evaluation of tooth movement.…”

Section: Discussionmentioning

confidence: 99%

Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: A proof of concept study

Park

Lee

2020

Preprint

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Background Radiographs are integral for evaluating of implant space and inter-root distance. The purpose of this report is to introduce a method for evaluating 3D root position with minimal radiation using 3D tooth model which is composed of intraoral-scanned crown and CBCT-scanned root. Materials and methods An intraoral scan and CBCT scan of the patient were obtained before treatment. In the CBCT image, tooth segmentation was performed by isolating individual tooth from the maxillary and mandibular alveolar bone using software program. By combining segmented individual tooth with the intraoral scan, consequently, 3D tooth model was fabricated. Results After treatment, the additional intraoral scan at post-treatment was integrated into the tooth model and the resulting position of the root could be predicted without additional radiographs. It is possible to monitor the root position using 3D tooth model without the need for additional radiographs after a pretreatment CBCT scan. Conclusion The application of 3D tooth model benefits the patient by reducing radiation exposure while providing the clinician with a precise treatment evaluation for monitoring tooth movement.

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Section: Discussionmentioning

confidence: 99%

Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: A proof of concept study

Park

Lee

2020

Preprint

Self Cite

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“…These artifacts may influence the accuracy of integration when CBCT and intraoral scans are superimposed. As CBCT images do not accurately represent occlusion, especially the occlusal surface in dental images [7], replacing the dental part of a CT image with an intact dental image is essential for the accurate fabrication of 3D tooth models [8,9]. In this report, our method first fabricated tooth models after pretreatment by merging CBCT-and an intraoral-scanned crowns at pretreatment; then, this was used for the sequential evaluation of tooth movement.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: a proof of concept study

Lee

2020

Int J Implant Dent

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Background Radiographs are integral in evaluating implant space and inter-root distance. The purpose of this report is to introduce a method for evaluating the 3D root position with minimal radiation using a 3D tooth model composed of an intraoral-scanned crown and a cone-beam computed tomography (CBCT)-scanned root. Materials and methods Intraoral scan and CBCT scan of the patient were obtained before treatment. In the CBCT image, tooth segmentation was performed by isolating individual teeth from the maxillary and mandibular alveolar bone using software program. The 3D tooth model was fabricated by combining segmented individual teeth with the intraoral scan. Results A post-treatment intraoral scan was integrated into the tooth model, and the resulting position of the root could be predicted without additional radiographs. It is possible to monitor the root position after a pretreatment CBCT scan using a 3D tooth model without additional radiographs. Conclusion The application of the 3D tooth model benefits the patient by reducing repeated radiation exposure while providing the clinician with a precise treatment evaluation to monitor tooth movement.

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“…Subsequently, the original dental model was duplicated to the reference standard to avoid error from landmark identification. Previous studies illustrated the accuracy of registration between the CBCT and digital dental model, 16 as well as that between the CBCT and 3D facial image. 15 In this study, the mean absolute differences between repeated reference standard models were within 0.07 6 0.05 mm and ICC values were close to 1.000 ( Table 2), indicating that the CBCT-based reference standard was accurate and reliable.…”

Section: Discussionmentioning

confidence: 99%

“…The registration method and its accuracy were introduced in previous studies. 16,17 The gingival area and interproximal contact region were removed from the digital dental model. After global registration, the skeletal portion was removed.…”

Section: Construction Of Cbct-based Dentofacial Images As the Referenmentioning

confidence: 99%

Integration of digital maxillary dental casts with 3D facial images in orthodontic patients:

Xiao¹,

Liu²,

Gu³

2019

The Angle Orthodontist

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Objective To evaluate three-dimensional (3D) accuracy and reliability of nonradiographic dentofacial images integrated with a two-step method. Methods 3D facial images, cone-beam computed tomography (CBCT) images and digital maxillary dental casts were obtained from 20 pre-orthodontic subjects. Digital dental casts were integrated into 3D facial images using a two-step method based on the anterior tooth area. 3D coordinate values of five dental landmarks were identified in both dentofacial images and CBCT images. The accuracy of the integration method was assessed with paired t-tests between dentofacial images and CBCT-based reference standards. Intraclass correlation coefficients (ICCs) were assessed for the reliability of dentofacial images and CBCT-based images. Analysis of variance and Kruskal-Wallis tests evaluated the accuracy of the method in different dimensions. Results There was no statistical difference between dentofacial images and CBCT reference standards in both translational and rotational dimensions (P > .05). Translational mean absolute errors for full dentitions were within 0.42 mm and ICCs were over 0.998 in x, y, and z directions. Rotational mean absolute errors for full dentitions were within 0.92° and ICCs over 0.734 in pitch, yaw, and roll orientations. Integration errors were significantly greater in the first molar, z-translation, and pitch rotation (P < .05). Conclusions Integrating 3D dentofacial images with the two-step method is precise and acceptable for clinical diagnostics and scientific purposes. Errors were greater in the molar region, z-translation, and pitch rotation.

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Registration area and accuracy when integrating laser-scanned and maxillofacial cone-beam computed tomography images

Cited by 23 publications

References 28 publications

Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: A proof of concept study

Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: A proof of concept study

Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: a proof of concept study

Integration of digital maxillary dental casts with 3D facial images in orthodontic patients:

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