Effectiveness of creating digital twins with different digital dentition models and cone-beam computed tomography

Abstract

Distortion of dentition may occur in cone-beam computed tomography (CBCT) scans due to artifacts, and further imaging is frequently required to produce digital twins. The use of a plaster model is common; however, it has certain drawbacks. This study aimed to assess the feasibility of different digital dentition models over that of plaster casts. Plaster models, alginate impressions, intraoral scan (IOS) images, and CBCT images of 20 patients were obtained. The desktop model scanner was used to scan the alginate impression twice, five minutes and two hours after impression-making. Using an IOS, the full arch was scanned in segments using CS 3600 and simultaneously with i700 wireless. The digital twins obtained from the alginate impression and IOS were superimposed with those obtained from the plaster cast. The differences and distances at each reference point were measured. Scans of alginate impressions after two hours showed the greatest discrepancies, but these were all less than the CBCT voxel size of 0.39 mm. Alginate impression scans and IOS are suitable supplements to CBCT compared to the plaster model. Accuracy can be improved by scanning the alginate impression within five minutes or by intraoral scanning of the entire arch with segmentation.

Comparison of Tooth Size Measurements in Orthodontics Using Conventional and 3D Digital Study Models

“…However, the limitations of plaster models, such as time-consuming processes and susceptibility to damage, storage space and condition problems, and data sharing, should also be considered [23][24][25]. Digitized models share some disadvantages with conventional plaster models, including impression (contraction of the impression material) and pouring (expansion of the plaster) process errors [26]. The greater accuracy of the digitized model of plaster cast obtained from silicone impressions compared to alginate impressions can be explained by the higher dimensional stability of the material, with it showing less sensitivity to time-dependent deformation [16,27].…”

Fast prototype and rapid construction of three-dimensional and multi-scaled pitcher for controlled drainage by systematic biomimicry

“…Continuous micro-stereolithography 3D printing also enables the rapid preparation of sophisticated 3D structures [30][31][32]. Moreover, introducing a digital twin model can dramatically improve the accuracy of constructed irregular models [33,34] and optimize the performance of specific composite materials through the integration of characterization data, optimization of parameters, and simulation of performance [35,36]. In light of this, we hypothesize that these challenges can be addressed by combining these methods, leveraging Micro-CT for 3D characterization, a digital twin model for optimization, and 3D printing for rapid fabrication.…”