Accuracy of capturing nasal, orbital, and auricular defects with extra- and intraoral optical scanners and smartphone: An in vitro study

Unkovskiy, Alexey; Spintzyk, Sebastian; Beuer, Florian; Huettig, Fabian; Röhler, Ariadne; Kraemer-Fernandez, Pablo

doi:10.1016/j.jdent.2021.103916

Cited by 20 publications

(10 citation statements)

References 29 publications

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“…Another limitation could be that the present study comprehensively tested precision through repeated measurements, but not accuracy or trueness. However, as previously stated, the high accuracy of the specific scanner is well established for different objects and surfaces [ 16 , 18 , 19 , 20 , 21 , 22 ] and, thus, it is also expected to be evident in skeletal surfaces as the ones tested here.…”

Section: Discussionmentioning

confidence: 55%

“…The study tested precision, and not trueness, because the true form of the specimens would be difficult to obtain in such high detail. However, the fact that precision was high in all different tested scenarios (various anatomical form configurations in different surface conditions), along with the established trueness of the scanner in various other models [ 16 , 18 , 19 , 20 , 21 ], strongly indicates that high accuracy would also be evident in the skeletal surfaces tested here. The high accuracy of this scanner has already been exhibited in previous studies testing different surfaces such as teeth [ 16 ], human skin [ 18 , 19 ], human fingerprints depicted in plastic materials [ 20 ], or even in difficult-to-scan objects [ 21 ].…”

Section: Discussionmentioning

confidence: 65%

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Precision of a Hand-Held 3D Surface Scanner in Dry and Wet Skeletal Surfaces: An Ex Vivo Study

et al. 2022

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Three-dimensional surface scans of skeletal structures have various clinical and research applications in medicine, anthropology, and other relevant fields. The aim of this study was to test the precision of a widely used hand-held surface scanner and the associated software’s 3D model generation-error in both dry and wet skeletal surfaces. Ten human dry skulls and ten mandibles (dry and wet conditions) were scanned twice with an industrial scanner (Artec Space Spider) by one operator. Following a best-fit superimposition of corresponding surface model pairs, the mean absolute distance (MAD) between them was calculated on ten anatomical regions on the skulls and six on the mandibles. The software’s 3D model generation process was repeated for the same scan of four dry skulls and four mandibles (wet and dry conditions), and the results were compared in a similar manner. The median scanner precision was 31 μm for the skulls and 25 μm for the mandibles in dry conditions, whereas in wet conditions it was slightly lower at 40 μm for the mandibles. The 3D model generation-error was negligible (range: 5–10 μm). The Artec Space Spider scanner exhibits very high precision in the scanning of dry and wet skeletal surfaces.

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Section: Discussionmentioning

confidence: 55%

Section: Discussionmentioning

confidence: 65%

Precision of a Hand-Held 3D Surface Scanner in Dry and Wet Skeletal Surfaces: An Ex Vivo Study

et al. 2022

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“…This approach provides faster, cheaper, and more customized solutions and is widely documented in the literature [17][18][19]. The first step of the procedure is data acquisition: surface laser scanning, 3D photogrammetry, CT, and an MRI scan, which are standard methods mentioned in the scientific literature [6,[20][21][22][23]. For example, to manufacture an auricular prosthesis supported by craniofacial implants, the overlapping of CT and surface laser scan data ensures the best accuracy thanks to the combination of the skin surface and the bony skull data in a single STL file, which is useful to determine the position of the craniofacial implants in relation to the prosthesis [11].…”

Section: Discussionmentioning

confidence: 99%

An Update of Eyeglasses-Supported Nasal–Facial Prosthetic Rehabilitation of Cancer Patients with Post-Surgical Complications: A Case Report

et al. 2023

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This case report aims to describe novel steps in the digital design/manufacturing of facial prostheses for cancer patients with wide inoperable residual defects, with a focus on a case of a mid-facial defect. A facial scanner was used to make an impression of the post-surgical residual defect and to digitalize it. The daughter’s face scan was used for reconstructing the missing anatomy. Using 3D printing technologies, try-in prototypes were produced in silicone material. The substructure was laser melted. The final prosthesis was relined directly onto the patient’s defect. The prosthesis resulted in a very low weight and a high elasticity of the external margins. The laser-melted substructure ensured the necessary rigidity with minimum thickness.

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“…Finally, the first structured light scanners were not calibrated for facial scanning. Designed primarily for intraoral dental applications, the optical properties may not have the optimal focal distance to obtain the most delicate details of the skin ( 57 , 58 ).…”

Section: Facial Prosthetics Productionmentioning

confidence: 99%

Present and future of extraoral maxillofacial prosthodontics: Cancer rehabilitation

Salazar-Gamarra

Binasco²,

Seelaus³

et al. 2022

Front. Oral. Health

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Historically, facial prosthetics have successfully rehabilitated individuals with acquired or congenital anatomical deficiencies of the face. This history includes extensive efforts in research and development to explore best practices in materials, methods, and artisanal techniques. Presently, extraoral maxillofacial rehabilitation is managed by a multiprofessional team that has evolved with a broadened scope of knowledge, skills, and responsibility. This includes the mandatory integration of different professional specialists to cover the bio-psycho-social needs of the patient, systemic health and pathology surveillance, and advanced restorative techniques, which may include 3D technologies. In addition, recent digital workflows allow us to optimize this multidisciplinary integration and reduce the active time of both patients and clinicians, as well as improve the cost-efficiency of the care system, promoting its access to both patients and health systems. This paper discusses factors that affect extraoral maxillofacial rehabilitation's present and future opportunities from teamwork consolidation, techniques utilizing technology, and health systems opportunities.

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Accuracy of capturing nasal, orbital, and auricular defects with extra- and intraoral optical scanners and smartphone: An in vitro study

Cited by 20 publications

References 29 publications

Precision of a Hand-Held 3D Surface Scanner in Dry and Wet Skeletal Surfaces: An Ex Vivo Study

Precision of a Hand-Held 3D Surface Scanner in Dry and Wet Skeletal Surfaces: An Ex Vivo Study

An Update of Eyeglasses-Supported Nasal–Facial Prosthetic Rehabilitation of Cancer Patients with Post-Surgical Complications: A Case Report

Present and future of extraoral maxillofacial prosthodontics: Cancer rehabilitation

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