Comparison of Dental Stone Models and Their 3D Printed Acrylic Replicas for the Accuracy and Mechanical Properties

Czajkowska, Marta; Walejewska, Ewa; Zadrożny, Łukasz; Wieczorek, Monika; Święszkowski, Wojciech; Wagner, Leopold; Mijiritsky, Eitan; Markowski, Jarosław

doi:10.3390/ma13184066

Cited by 25 publications

(16 citation statements)

References 28 publications

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“…Stone models are considered the gold standard and a fundamental material for diagnosis, treatment planning, and fabrication of prostheses [1,6,14,[19][20][21]. The type IV dental stone is commonly used to fabricate definitive casts and removable dies for fixed prostheses due to its superior mechanical properties, such as high compressive strength, hardness, and low expansion [9,[22][23][24].…”

Section: Discussionmentioning

confidence: 99%

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Evaluating the accuracy of CAD/CAM optimized stones compared to conventional type IV stones

Ceylan

Emir²

2023

PLoS ONE

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This study compared the accuracy (trueness and precision) of stone models fabricated using two brands of CAD/CAM optimized stones Cerec Stone (BC) and Elite Master (EM), and a conventional type IV stone Elite Rock Fast (ERF). 30 conventional Type IV and scannable stone complete-arch models were scanned with a blue LED extraoral scanner, and root mean square values were obtained. 6 abutments were used in complete-arch models. The digital models were compared with the master model to evaluate their trueness using model superimposition with Geomagic software. Precision was determined for each case by superimposing combinations of the 10 datasets in each group. The point cloud density of each model was calculated with MeshLab software. Kruskal-Wallis and Mann-Whitney non-parametric tests were used for the statistical analysis. The trueness of the stone models was 96 μm for the BC, 88.2 μm for the EM, and 87.6 μm for the ERF. There were no significant differences between the tested dental stones (p = .768). However, the EM models (35.6 μm) were more precise than the BC (46.9 μm) and ERF (56.4 μm) models (p = .001, p < .001). EM models also showed the highest point cloud density. There were significant differences in point cloud density (p = .003). The EM models showed significant differences in precision but no significant differences in terms of trueness. Although EM was more precise and had the highest point cloud density, all models were within the clinically acceptable limit.

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Section: Discussionmentioning

confidence: 99%

“…Therefore, accurate replicas of teeth are essential to obtain clinically acceptable results [ 4 ]. Dental stones are cheap, easy to handle, widely available, and compatible with impression materials [ 2 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the accuracy of CAD/CAM optimized stones compared to conventional type IV stones

Ceylan

Emir²

2023

PLoS ONE

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“…All the specimens were tested with a Shore D hardness tester (TIME Group Inc., Beijing, China) [ 13 ]. The pointed indenter penetrated the surface of the sample (Figure 1 ), and the result of the hardness was noted approximately after five seconds on the screen of the device.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Hypochlorous Acid Disinfectant on the Reproduction of Details and Surface Hardness of Type III Dental Stone

Zaid¹,

SM²

2022

Cureus

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IntroductionGypsum products have been used for many years in dentistry. They are used to make casts that are used in different dental laboratory procedures. It is considered a source of contamination because it comes in contact with blood and saliva that are found on dental impressions. Because it is difficult to make sure that every impression brought to the dental laboratory has been cleaned and because cleaning impressions is a complicated process that can lead to problems because of the way impression materials are made, cleaning the cast has become a key part of preventing infections. For this study, we used two ways (immersion and spray) to apply a hypochlorous acid (HOCl) disinfectant solution to type III dental stone to see how they affected the stone's surface hardness and its ability to show surface details accurately. Materials and methodsA total of 100 samples of type III dental stone, 50 samples for each test, which include the reproduction of detail test and surface hardness test, were prepared and randomly divided into five groups, 10 samples for each test group, which include group A (control), group B (immersion in 200 ppm HOCl disinfectant for five minutes), group C (spraying with 200 ppm HOCl disinfectant for five minutes), group D (immersion in 0.6% sodium hypochlorite (NaOCl) disinfectant for five minutes), and group E (spraying with 0.6% NaOCl disinfectant for five minutes). ResultsThe results showed that all the samples had met the reproduction of detail test requirement after disinfection with HOCl, while a significant reduction in the surface hardness of type III stone samples was also shown. ConclusionThe less undesirable effects of HOCl disinfectant solution on the surface hardness of type III dental stone when compared to sodium hypochlorite, as well as the absence of adverse effects on detail reproduction, made the HOCl disinfectant solution a good choice for dentists and dental laboratory personnel for cast disinfection and contamination control.

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“…There is a gap in the literature on trueness and precision of dental devices for clinical use. So far, only a few studies have effectively compared accuracy of the manufactured dental models by different printing technologies with the corresponding digital files [8][9][10]. In addition, these studies present different outcomes concerning the clinical relevance of the deviation between printing equipment.…”

Section: Introductionmentioning

confidence: 99%

Accuracy Comparison among 3D-Printing Technologies to Produce Dental Models

et al. 2022

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Background: Little is known on accuracy comparisons among 3D-printing trueness and precision to produce dental models. The purpose of this study was to investigate the accuracy of different 3D-printing technologies (SLA; DLP; LCD poly and monochromatic; and Polyjet). Methods: Fifteen models were manufactured by the five different 3D printers used in this study. The manufactured models were physically measured in the corresponding lengths for trueness and reproducibility. Means and standard deviations were obtained for the five computer-aided manufacturing (CAM) methods and compared. Results: No significant difference was found in the comparison between observers in all measurements performed with the different model algorithms. Pairwise Wilcoxon non-parametric test comparisons of trueness between 3D-printers revealed statistically significant differences between Stratasys versus Anycubic (p = 0.025) and Anycubic versus Form 2 (p = 0.048). Conclusion: The present findings suggest that the 3D-printing methods may have small significant discrepancies when compared to the original digital files, which may not be clinically relevant. In addition, there were no significant discrepancies among median measurements of each printing method (within 3D-printer analysis), which suggests that, for dental casts, all of the studied devices performed similarly.

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Comparison of Dental Stone Models and Their 3D Printed Acrylic Replicas for the Accuracy and Mechanical Properties

Cited by 25 publications

References 28 publications

Evaluating the accuracy of CAD/CAM optimized stones compared to conventional type IV stones

Evaluating the accuracy of CAD/CAM optimized stones compared to conventional type IV stones

The Effect of Hypochlorous Acid Disinfectant on the Reproduction of Details and Surface Hardness of Type III Dental Stone

Accuracy Comparison among 3D-Printing Technologies to Produce Dental Models

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