Effect of Printing Direction on the Accuracy of 3D-Printed Dentures Using Stereolithography Technology

Hada, Tamaki; Kanazawa, Manabu; Iwaki, Maiko; Arakida, Toshio; Soeda, Yumika; Katheng, Awutsadaporn; Otake, Ryosuke; Minakuchi, Shunsuke

doi:10.3390/ma13153405

Cited by 105 publications

(101 citation statements)

References 35 publications

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“…Hada et al investigated the accuracy of SLA-printed dentures using transparent material (Clear, Formlabs, Somerville, MA, USA) and a Form 2 printer (Formlabs, Somerville, USA) with 100 µm layer thickness and reported the 45° orientation to provide the superior trueness [ 24 ]. It must be stressed that this material is not verified by the manufacturer for denture base fabrication nor for dental applications.…”

Section: Discussionmentioning

confidence: 99%

“…However, no clinical report can be found regarding the utilization of SLA for manufacturing complete dentures in a digital workflow. The study of Hada et al investigated the influence of the build angle on the accuracy of stereolithographically printed bases [ 24 ]. It must be emphasized that the material used in this study was transparent and not specified by the manufacturer for denture base fabrication.…”

Section: Introductionmentioning

confidence: 99%

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Stereolithography vs. Direct Light Processing for Rapid Manufacturing of Complete Denture Bases: An In Vitro Accuracy Analysis

Unkovskiy

Schmidt

Beuer

et al. 2021

JCM

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The topical literature lacks any comparison between stereolithography (SLA) and direct light processing (DLP) printing methods with regard to the accuracy of complete denture base fabrication, thereby utilizing materials certified for this purpose. In order to investigate this aspect, 15 denture bases were printed with SLA and DLP methods using three build angles: 0°, 45° and 90°. The dentures were digitalized using a laboratory scanner (D2000, 3Shape) and analyzed in analyzing software (Geomagic Control X, 3D systems). Differences between 3D datasets were measured using the root mean square (RMS) value for trueness and precision and mean and maximum deviations were obtained for each denture base. The data were statistically analyzed using two-way ANOVA and Tukey’s multiple comparison test. A heat map was generated to display the locations of the deviations within the intaglio surface. The overall tendency indicated that SLA denture bases had significantly higher trueness for most build angles compared to DLP (p < 0.001). The 90° build angle may provide the best trueness for both SLA and DLP. With regard to precision, statistically significant differences were found in the build angles only. Higher precision was revealed in the DLP angle of 0° in comparison to the 45° and 90° angles.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stereolithography vs. Direct Light Processing for Rapid Manufacturing of Complete Denture Bases: An In Vitro Accuracy Analysis

Unkovskiy

Schmidt

Beuer

et al. 2021

JCM

View full text Add to dashboard Cite

show abstract

“…To place as many models as possible, they are often arranged vertically. The staircase effect that is caused by printing in layers appears different depending on the orientation on the platform and affects the surface quality [ 19 ]. More knowledge is needed about the impact of this printing parameter on the accuracy.…”

Section: Introductionmentioning

confidence: 99%

Accurate Bracket Placement with an Indirect Bonding Method Using Digitally Designed Transfer Models Printed in Different Orientations—An In Vitro Study

Süpple

Glasenapp

Hofmann

et al. 2021

JCM

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Objective: A digital workflow opens up new possibilities for the indirect bonding (IDB) of brackets. We tested if the printing orientation for bracket transfer models on the build platform of a 3D printer influences the accuracy of the following IDB method. We also evaluated the clinical acceptability of the IDB method combining digitally planned and printed transfer models with the conventional fabrication of pressure-molded transfer trays. Materials and Methods: In total, 27 digitally planned bracket transfer models were printed with both 15° and 75° angulation from horizontal plane on the build platform of a digital light processing (DLP) printer. Brackets were temporarily bonded to the transfer models and pressure-molded trays were produced on them. IDB was then performed using the trays on the respective plaster models. The plaster models were scanned with an optical scanner. Digitally planned pre-bonding and scanned post-bonding bracket positions were superimposed with a software and resulted in three linear and three angular deviations per bracket. Results: No statistically significant differences of the transfer accuracy of printed transfer models angulated 15° or 75° on the 3D printer build platform were found. About 97% of the linear and 82% of the angular deviations were within the clinically acceptable range of ±0.2 mm and ±1°, respectively. The highest inaccuracies in the linear dimension occurred in the vertical towards the gingival direction and in the angular dimension in palatal crown torque. Conclusion: For the IDB method used, the printing orientation on the build platform did not have a significant impact on the transfer accuracy.

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“…Structures within a polymer object can be orientated either along the Z -axis or along the X , Y -plane. An orientation along the Z -axis was shown to be favorable for achieving a higher resolution in micron-scale 3D printing, depending on the printer’s resolution and the layer thickness [ 20 , 143 ].…”

Section: Requirements For Pµsl Processabilitymentioning

confidence: 99%

Fabrication of Microfluidic Devices for Emulsion Formation by Microstereolithography

2021

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Droplet microfluidics—the art and science of forming droplets—has been revolutionary for high-throughput screening, directed evolution, single-cell sequencing, and material design. However, traditional fabrication techniques for microfluidic devices suffer from several disadvantages, including multistep processing, expensive facilities, and limited three-dimensional (3D) design flexibility. High-resolution additive manufacturing—and in particular, projection micro-stereolithography (PµSL)—provides a promising path for overcoming these drawbacks. Similar to polydimethylsiloxane-based microfluidics 20 years ago, 3D printing methods, such as PµSL, have provided a path toward a new era of microfluidic device design. PµSL greatly simplifies the device fabrication process, especially the access to truly 3D geometries, is cost-effective, and it enables multimaterial processing. In this review, we discuss both the basics and recent innovations in PµSL; the material basis with emphasis on custom-made photopolymer formulations; multimaterial 3D printing; and, 3D-printed microfluidic devices for emulsion formation as our focus application. Our goal is to support researchers in setting up their own PµSL system to fabricate tailor-made microfluidics.

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Effect of Printing Direction on the Accuracy of 3D-Printed Dentures Using Stereolithography Technology

Cited by 105 publications

References 35 publications

Stereolithography vs. Direct Light Processing for Rapid Manufacturing of Complete Denture Bases: An In Vitro Accuracy Analysis

Stereolithography vs. Direct Light Processing for Rapid Manufacturing of Complete Denture Bases: An In Vitro Accuracy Analysis

Accurate Bracket Placement with an Indirect Bonding Method Using Digitally Designed Transfer Models Printed in Different Orientations—An In Vitro Study

Fabrication of Microfluidic Devices for Emulsion Formation by Microstereolithography

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