Dental scanning in CAD/CAM technologies: laser beams

Sinescu, Cosmin; Negruțiu, Meda Lavinia; Faur, Nicolae; Negru, Radu; Romînu, Mihai; Cozarov, Dalibor

doi:10.1117/12.764829

Cited by 6 publications

(9 citation statements)

References 5 publications

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“…The master cast is conditioned from the surgical phase by means of intraoral scanning of the impression posts position, which sets the precision and correct orientation of the implant through a scanner based on photogrammetry [ 10 , 14 ].…”

Section: Discussionmentioning

confidence: 99%

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New Design for Rapid Prototyping of Digital Master Casts for Multiple Dental Implant Restorations

2015

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AimThis study proposes the replacement of all the physical devices used in the manufacturing of conventional prostheses through the use of digital tools, such as 3D scanners, CAD design software, 3D implants files, rapid prototyping machines or reverse engineering software, in order to develop laboratory work models from which to finish coatings for dental prostheses. Different types of dental prosthetic structures are used, which were adjusted by a non-rotatory threaded fixing system.MethodFrom a digital process, the relative positions of dental implants, soft tissue and adjacent teeth of edentulous or partially edentulous patients has been captured, and a maser working model which accurately replicates data relating to the patients oral cavity has been through treatment of three-dimensional digital data.ResultsCompared with the conventional master cast, the results show a significant cost savings in attachments, as well as an increase in the quality of reproduction and accuracy of the master cast, with the consequent reduction in the number of patient consultation visits. The combination of software and hardware three-dimensional tools allows the optimization of the planning of dental implant-supported rehabilitations protocol, improving the predictability of clinical treatments and the production cost savings of master casts for restorations upon implants.

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Section: Discussionmentioning

confidence: 99%

“…The non-contact scanning procedure involves laser scanning (laser triangulation technology) and photogrammetry. Different types of dental structures need different types of scanning procedures in order to obtain a competitive complex 3D virtual model that can be used in CAD/CAM technologies [ 14 ].…”

Section: Methodsmentioning

confidence: 99%

New Design for Rapid Prototyping of Digital Master Casts for Multiple Dental Implant Restorations

2015

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“…Their demerits are the time-consuming and impractical procedures needed for artifact digitization. 11 Non-contact scanning includes laser scanning and photogrammetry. The basis of this technology is laser triangulation.…”

Section: Discussionmentioning

confidence: 99%

Accuracy evaluation of a new three-dimensional reproduction method of edentulous dental casts, and wax occlusion rims with jaw relation

Yuan¹,

Sun²,

Wang³

et al. 2013

Int J Oral Sci

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The article introduces a new method for three-dimensional reproduction of edentulous dental casts, and wax occlusion rims with jaw relation by using a commercial high-speed line laser scanner and reverse engineering software and evaluates the method's accuracy in vitro. The method comprises three main steps: (i) acquisition of the three-dimensional stereolithography data of maxillary and mandibular edentulous dental casts and wax occlusion rims; (ii) acquisition of the three-dimensional stereolithography data of jaw relations; and (iii) registration of these data with the reverse engineering software and completing reconstruction. To evaluate the accuracy of this method, dental casts and wax occlusion rims of 10 edentulous patients were used. The lengths of eight lines between common anatomic landmarks were measured directly on the casts and occlusion rims by using a vernier caliper and on the three-dimensional computerized images by using the software measurement tool. The direct data were considered as the true values. The paired-samples t-test was used for statistical analysis. The mean differences between the direct and the computerized measurements were mostly less than 0.04 mm and were not significant (P>0.05). Statistical significance among 10 patients was assessed using one-way analysis of variance (P<0.05). The result showed that the 10 patients were considered statistically no significant. Therefore, accurate three-dimensional reproduction of the edentulous dental casts, wax occlusion rims, and jaw relations was achieved. The proposed method enables the visualization of occlusion from different views and would help to meet the demand for the computer-aided design of removable complete dentures.

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“…The purpose of the 3D scanner is to measure and record the relative distance between the surface of the object and a known point in space. This geometric data is expressed in the form of point cloud data ( Sinescu et al, 2008 ). In order to generate accurate 3D models for inspection, 3D reconstruction of metal crowns is required.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, it is of great significance to obtain 3D reconstruction of dental models. However, the related research mainly focused on reconstruction and measurement of plaster dental models or casting dental models, while there are few studies on dental metal models manufactured by SLM ( Sinescu et al, 2008 ; Zhou and Fan, 2017 ; Song et al, 2018 ; Yang et al, 2018 ). We already have a case of E-quality control of automotive parts, but we still face some challenges for the E-quality control of metal crowns manufactured by SLM.…”

Section: Introductionmentioning

confidence: 99%

E-quality Control in Dental Metal Additive Manufacturing Inspection Using 3D Scanning and 3D Measurement

Liang

Lai

Luo

et al. 2020

Front. Bioeng. Biotechnol.

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3D printed metal crowns can be used for dental restorations. The main quality control challenge of these dental metal is the method of quality inspection. Electronic quality is a process by which the quality of the process and the parts produced can be checked online, thereby improving the process and reducing the time it takes for the entire process. Here, we propose a combination of 3D scanning and 3D measurement for 3D inspection of metal crowns. The data extracted from the 3D printed metal crowns were used as case studies to prove the proposed methodology. The obtained results confirm that the new method has very high classification accuracy compared with the traditional inspection methods, and thus yields excellent results. Moreover, the proposed approach is capable to archive 3D models of the parts and achieve rapid quality control. This paper forms the basis for solving many other similar problems that occur in 3D printing related industries.

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Dental scanning in CAD/CAM technologies: laser beams

Cited by 6 publications

References 5 publications

New Design for Rapid Prototyping of Digital Master Casts for Multiple Dental Implant Restorations

New Design for Rapid Prototyping of Digital Master Casts for Multiple Dental Implant Restorations

Accuracy evaluation of a new three-dimensional reproduction method of edentulous dental casts, and wax occlusion rims with jaw relation

E-quality Control in Dental Metal Additive Manufacturing Inspection Using 3D Scanning and 3D Measurement

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