Facial Scanner Accuracy with Different Superimposition Methods: An In Vivo Study

Marques, Duarte; Alves, Rita; Pinto, Ricardo; Caramês, João Rodrigo Bártolo; Francisco, Helena; Caramês, João

doi:10.11607/ijp.7253

Cited by 9 publications

(3 citation statements)

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“…With the advancement of digital dentistry, devices, and computer software for facial esthetic analysis have been developed [ 12 , 13 ]. Currently, 3D reconstruction of the jaws using cone-beam computed tomography is widely used for radiographic diagnosis in dental treatments [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Intra‐ and Interrater Agreement of Face Esthetic Analysis in 3D Face Images

Park

Mai

Yen

et al. 2023

BioMed Research International

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The use of three-dimensional (3D) facial scans for facial analysis is increasing in maxillofacial treatment. The aim of this study was to investigate the consistency of two-dimensional (2D) and 3D facial analyses performed by multiple raters. Six men and four women (25–36-year-old) participated in this study. The 2D images of the smiling and resting faces in the frontal and sagittal planes were obtained. The 3D facial and intraoral scans were merged to generate virtual 3D faces. Ten clinicians performed facial analyses by investigating 14 indices of 2D and 3D faces. Intra- and interrater agreements of the results of 2D and 3D facial analyses within and among the participants were evaluated. The intrarater agreement between the 2D and 3D facial analyses varied according to the indices. The highest and lowest agreements were found for the dental crowding index (0.94) and smile line curvature index (0.56) in the frontal plane, and Angle’s classification (canine) index (0.98) and occlusal plane angle index (0.55) in the profile plane. In the frontal plane, the interrater agreements were generally higher for the 3D images than for the 2D images, while in the profile plane, the interrater agreements were high in the Angle’s classification (canine) index however low in the other indices. Several occlusion-related indices were missing in the 2D images because the posterior teeth were not observed. Esthetic analysis results between 2D and 3D face images can differ according to the evaluation indices. The use of 3D faces is recommended over 2D images to increase the reliability of facial analyses, as it can fully assess both esthetic and occlusion-related indices.

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Section: Introductionmentioning

confidence: 99%

[Retracted] Intra‐ and Interrater Agreement of Face Esthetic Analysis in 3D Face Images

Park

Mai

Yen

et al. 2023

BioMed Research International

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“…However, since distinctive and standardized boundaries on the face are absent, segmenting the area would not be objective. Moreover, other studies show that measuring points have adequate reliability [25,31,32].…”

Section: Limitations Of the Studymentioning

confidence: 97%

Comparative Analysis of Three Facial Scanners for Creating Digital Twins by Focusing on the Difference in Scanning Method

Cho

Byun

et al. 2023

Bioengineering

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Background: Multi-dimensional facial imaging is increasingly used in hospital clinics. A digital twin of the face can be created by reconstructing three-dimensional (3D) facial images using facial scanners. Therefore, the reliability, strengths, and weaknesses of scanners should be investigated and approved; Methods: Images obtained from three facial scanners (RayFace, MegaGen, and Artec Eva) were compared with cone-beam computed tomography images as the standard. Surface discrepancies were measured and analyzed at 14 specific reference points; Results: All scanners used in this study achieved acceptable results, although only scanner 3 obtained preferable results. Each scanner exhibited weak and strong points because of differences in the scanning methods. Scanner 2 exhibited the best result on the left endocanthion; scanner 1 achieved the best result on the left exocanthion and left alare; and scanner 3 achieved the best result on the left exocanthion (both cheeks); Conclusions: These comparative analysis data can be used when creating digital twins through segmentation, selecting and merging data, or developing a new scanner to overcome all shortcomings.

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“…An example of application of the embedding in prosthetics is the fabrication of complete dentures [ 23 ]. Other advantages of using this type of data representation include the ability to create high-precision anatomical documentation, to measure and evaluate clinical outcomes, and to improve communication with patients and with other professionals [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Integration and Application of Multimodal Measurement Techniques: Relevance of Photogrammetry to Orthodontics

Pojda

Tomaka

Luchowski

et al. 2021

Sensors

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Multimodal imaging, including 3D modalities, is increasingly being applied in orthodontics, both as a diagnostic tool and especially for the design of intraoral appliances, where geometric accuracy is very important. Laser scanners and other precision 3D-imaging devices are expensive and cumbersome, which limits their use in medical practice. Photogrammetry, using ordinary 2D photographs or video recordings to create 3D imagery, offers a cheaper and more convenient alternative, replacing the specialised equipment with handy consumer cameras. The present study addresses the question of to what extent, and under what conditions, this technique can be an adequate replacement for the 3D scanner. The accuracy of simple surface reconstruction and of model embedding achieved with photogrammetry was verified against that obtained with a triangulating laser scanner. To roughly evaluate the impact of image imperfections on photogrammetric reconstruction, the photographs for photogrammetry were taken under various lighting conditions and were used either raw or with a blur-simulating defocus. Video footage was also tested as another 2D-imaging modality feeding data into photogrammetry. The results show the significant potential of photogrammetric techniques.

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Facial Scanner Accuracy with Different Superimposition Methods: An In Vivo Study

Cited by 9 publications

References 0 publications

[Retracted] Intra‐ and Interrater Agreement of Face Esthetic Analysis in 3D Face Images

[Retracted] Intra‐ and Interrater Agreement of Face Esthetic Analysis in 3D Face Images

Comparative Analysis of Three Facial Scanners for Creating Digital Twins by Focusing on the Difference in Scanning Method

Integration and Application of Multimodal Measurement Techniques: Relevance of Photogrammetry to Orthodontics

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