Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position Change
The aim of this study was to evaluate the three-dimensional reproducibility of the structured-light facial scanner according to the head position change. A mannequin head was used and angle of the mannequin’s axis-orbital plane to the true horizontal plane was adjusted to +10, +5, 0, −5, and −10°. F...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Healthcare |
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| Online Access: | https://www.mdpi.com/2227-9032/9/4/428 |
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| author | Seung-Hoon Oh Jung-Soo Park Jae-Jun Ryu In-Seok Song Seok-Ki Jung |
| author_facet | Seung-Hoon Oh Jung-Soo Park Jae-Jun Ryu In-Seok Song Seok-Ki Jung |
| author_sort | Seung-Hoon Oh |
| collection | DOAJ |
| description | The aim of this study was to evaluate the three-dimensional reproducibility of the structured-light facial scanner according to the head position change. A mannequin head was used and angle of the mannequin’s axis-orbital plane to the true horizontal plane was adjusted to +10, +5, 0, −5, and −10°. Facial scanning was conducted 30 times, respectively, and 150 3D images were obtained. Reoriented landmarks of each group were compared and analyzed. Reproducibility decreased as the distance from the facial center increased. Additionally, the landmarks below showed lower reproducibility and higher dispersion than landmarks above. These differences occurred mainly in the anteroposterior direction as opposed to other directions. Positive inclination of the head position showed superior reproducibility compared to a negative inclination. This study showed that reproducibility of a structured-light scanner could be varied depending on the head position. Inaccuracies of landmarks in the anteroposterior direction are greater than in other directions. This means that evaluations of the profile using a structured-light scanner should be made carefully. Therefore, the proper head position should be set to ensure the accuracy of the image. |
| first_indexed | 2024-03-10T12:32:08Z |
| format | Article |
| id | doaj.art-a50d6bef6a4d4d26aa47c93acb78a690 |
| institution | Directory Open Access Journal |
| issn | 2227-9032 |
| language | English |
| last_indexed | 2024-03-10T12:32:08Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Healthcare |
| spelling | doaj.art-a50d6bef6a4d4d26aa47c93acb78a6902023-11-21T14:33:59ZengMDPI AGHealthcare2227-90322021-04-019442810.3390/healthcare9040428Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position ChangeSeung-Hoon Oh0Jung-Soo Park1Jae-Jun Ryu2In-Seok Song3Seok-Ki Jung4Department of Orthodontics, Graduate School of Clinical Dentistry, Korea University, Seoul 02841, KoreaDepartment of Periodontology, Korea University Anam Hospital, Seoul 02841, KoreaDepartment of Prosthodontics, Korea University Anam Hospital, Seoul 02841, KoreaDepartment of Oral and Maxillofacial Surgery, Korea University Anam Hospital, Seoul 02841, KoreaDepartment of Orthodontics, Korea University Guro Hospital, Seoul 08308, KoreaThe aim of this study was to evaluate the three-dimensional reproducibility of the structured-light facial scanner according to the head position change. A mannequin head was used and angle of the mannequin’s axis-orbital plane to the true horizontal plane was adjusted to +10, +5, 0, −5, and −10°. Facial scanning was conducted 30 times, respectively, and 150 3D images were obtained. Reoriented landmarks of each group were compared and analyzed. Reproducibility decreased as the distance from the facial center increased. Additionally, the landmarks below showed lower reproducibility and higher dispersion than landmarks above. These differences occurred mainly in the anteroposterior direction as opposed to other directions. Positive inclination of the head position showed superior reproducibility compared to a negative inclination. This study showed that reproducibility of a structured-light scanner could be varied depending on the head position. Inaccuracies of landmarks in the anteroposterior direction are greater than in other directions. This means that evaluations of the profile using a structured-light scanner should be made carefully. Therefore, the proper head position should be set to ensure the accuracy of the image.https://www.mdpi.com/2227-9032/9/4/428structured-light facial scannersoft tissue landmarkshead positionreproducibility |
| spellingShingle | Seung-Hoon Oh Jung-Soo Park Jae-Jun Ryu In-Seok Song Seok-Ki Jung Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position Change Healthcare structured-light facial scanner soft tissue landmarks head position reproducibility |
| title | Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position Change |
| title_full | Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position Change |
| title_fullStr | Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position Change |
| title_full_unstemmed | Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position Change |
| title_short | Three-Dimensional Reproducibility of the Soft Tissue Landmarks Taken by Structured-Light Facial Scanner in Accordance with the Head Position Change |
| title_sort | three dimensional reproducibility of the soft tissue landmarks taken by structured light facial scanner in accordance with the head position change |
| topic | structured-light facial scanner soft tissue landmarks head position reproducibility |
| url | https://www.mdpi.com/2227-9032/9/4/428 |
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