Accuracy and Internal Fit of 3D printed Occlusal Splint, according to the printing position

Abstract

Understanding the importance of 3D printing strategies is a key to obtain predictable, optimized and consistent dental appliances using digital technologies. This study aims to present the influence of printing orientation on the intraoral fit of full arch coverage splints. Splints were designed for two patients using the CAD software and printed in a SLA 3D printer with different orientations (0, 30, and 90 degrees), and the internal fit was checked on patients’ mouth. Differen­ces between the fit of the splints were verified, with the worst results for 90º oriented splints, although more detailed studies are recommended by the authors.
 DESCRIPTORS | Three-Dimensional Printing; Accuracy; Dimensional Measurement; Occlusal Splint; Print Orientation.

Accuracy of CAD/CAM-fabricated bite splints: milling vs 3D printing

“…So, the Dental LT in vertical building direction demonstrates a greater standard deviation regarding precision than the other materials or the Dental LT in horizontal position. This result is in accordance with another study investigating the clinical fit of SLA-printed bite splints [ 21 ].…”

Influence of print orientation and wet-dry storage time on the intaglio accuracy of additively manufactured occlusal devices

“…Further studies are needed to establish the optimal printing protocol and clinically acceptable manufacturing accuracy for fabricating AM occlusal devices. Print orientation has been reported to influence the manufacturing accuracy, 15,16,21,24 surface roughness, 20,22 fit, 17,23,26 mechanical properties, 18,25,[27][28][29][30][31][32][33][34][35] printing time, 21 and material consumption 21 of AM dental devices. While a print orientation may maximize the manufacturing accuracy of a dental device, the same print orientation may not maximize other properties of the same printed object.…”

“…have been reported to be affected by the AM technology, printer, and material used, 7,8 printing parameters (layer thickness, [9][10][11] print orientation, [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] position in the build platform), 27 and postprocessing methods. 7,27,29 The effect of other factors on the manufacturing accuracy and mechanical properties of AM dental devices, including the composition of the printed biocompatible material, optimal manufacturing protocol based on the AM technology, printer and material used, mechanical properties, and clinical performance of vat-polymerized AM occlusal devices, is still unclear.…”

“…6,7 Studies on the influence of print orientation on the manufacturing accuracy of casts, 15,20 interim dental restorations, 13,18,20,26 castable patterns, 17 complete dentures, 14,16 silicone indices, 19 and surgical guides are sparse. 12,21,27 Additionally, print orientation could also affect surface roughness, 20,22 fit, 17,23,26 mechanical properties, 18,25,[27][28][29][30][31][32][33][34][35] printing time, 21 and material consumption. 21 The authors are aware of only 1 previous study 23 that evaluated the influence of print orientation of the clinical fit of SLA AM occlusal devices, which reported no differences between the occlusal devices manufactured with different print orientations.…”

“…12,21,27 Additionally, print orientation could also affect surface roughness, 20,22 fit, 17,23,26 mechanical properties, 18,25,[27][28][29][30][31][32][33][34][35] printing time, 21 and material consumption. 21 The authors are aware of only 1 previous study 23 that evaluated the influence of print orientation of the clinical fit of SLA AM occlusal devices, which reported no differences between the occlusal devices manufactured with different print orientations. Therefore, the optimal print orientation for maximizing the manufacturing accuracy of AM devices is unclear.…”