Possibility of reconstruction of dental plaster cast from 3D digital study models

Abstract

ObjectivesTo compare traditional plaster casts, digital models and 3D printed copies of dental plaster casts based on various criteria. To determine whether 3D printed copies obtained using open source system RepRap can replace traditional plaster casts in dental practice. To compare and contrast the qualities of two possible 3D printing options – open source system RepRap and commercially available 3D printing.Design and settingsA method comparison study on 10 dental plaster casts from the Orthodontic department, Department of Stomatology, 2nd medical Faulty, Charles University Prague, Czech Republic.Material and methodsEach of 10 plaster casts were scanned by inEos Blue scanner and the printed on 3D printer RepRap [10 models] and ProJet HD3000 3D printer [1 model]. Linear measurements between selected points on the dental arches of upper and lower jaws on plaster casts and its 3D copy were recorded and statistically analyzed.Results3D printed copies have many advantages over traditional plaster casts. The precision and accuracy of the RepRap 3D printed copies of plaster casts were confirmed based on the statistical analysis. Although the commercially available 3D printing enables to print more details than the RepRap system, it is expensive and for the purpose of clinical use can be replaced by the cheaper prints obtained from RepRap printed copies.ConclusionsScanning of the traditional plaster casts to obtain a digital model offers a pragmatic approach. The scans can subsequently be used as a template to print the plaster casts as required. Using 3D printers can replace traditional plaster casts primarily due to their accuracy and price.

Position Accuracy of Implant Analogs on 3D Printed Polymer versus Conventional Dental Stone Casts Measured Using a Coordinate Measuring Machine

“…CMM analysis is widely used in dentistry to calculate the implant analog position on the x‐, y‐, and z‐axes, and is considered an accurate method to assess the dimensional discrepancies of the implant analog position between the different dental models . Previous studies, most of which focused on treatment planning and diagnosis for oral and maxillofacial surgery and orthodontics have analyzed the accuracy and precision of AM technologies . However, to the best knowledge of the authors, to date, there is no published study that analyzed the accuracy of the digital implant analog position on a 3D AM cast.…”

History and biomedical applications of digital signal and image processing

“…Digital modelling plays and important role in the orthodontic treatment replacing classical plaster casts by they digital models [21,22]. Digitalization of plaster casts are performed either by the 3D scanning or by processing of their stereophotos allowing to use numerical methods for evaluation of specific measures of dental arch [23,24].…”

Palatal volume and area assessment on digital casts generated from cone-beam computed tomography scans

“…Moreover, many studies have suggested that measurements derived from three-dimensional (3D) digital models have similar accuracy as those from traditional plaster casts. 7 Optical scanners can be used both in vivo and in vitro to scan the dentition or plaster casts to create digital models. 8 After making a 3D surface model of casts, the measurement of the palatal volume has been done geometrically or by creating a Computer-aided design model of the volume using reverse engineering technology.…”