Objects build orientation, positioning, and curing influence dimensional accuracy and flexural properties of stereolithographically printed resin

Unkovskiy, Alexey; Bui, Phan Hai-Binh; Schille, Christine; Geis-Gerstorfer, J; Huettig, Fabian; Spintzyk, Sebastian

doi:10.1016/j.dental.2018.09.011

Cited by 264 publications

(261 citation statements)

References 24 publications

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“…A 45° angulation printed at 50 µm has the best overall intaglio dimensional stability. The range of discrepancies of ∼50 to 100 µm are also similar to a previous study on the influence of angulation printing in an SLA printer . However, in this study the geometry of the guide is more complex compared to a simple rectangular printing .…”

Section: Discussionsupporting

confidence: 88%

“…The range of discrepancies of ∼50 to 100 µm are also similar to a previous study on the influence of angulation printing in an SLA printer . However, in this study the geometry of the guide is more complex compared to a simple rectangular printing . This is consistent with the general knowledge that the smaller the printing layer, the more accurate the printing will be .…”

Section: Discussionsupporting

confidence: 88%

“…However, little information exists in the current literature or 3D printer manufacturer's instructions on how the different manners of printing can have an effect on accuracy of implant guides produced in office. Like other stereolithographic printing, printing guides in different curing layer thicknesses or at different angulation can have an effect on the dimensional stability/discrepancy or consistency of the surgical guide . Errors from printing can manifest in higher inaccuracy of the guide intaglio surface and consequently more deviations in the implant guide tube direction.…”

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confidence: 99%

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Intaglio Surface Dimension and Guide Tube Deviations of Implant Surgical Guides Influenced by Printing Layer Thickness and Angulation Setting

Dalal

Ammoun

Abdulmajeed

et al. 2020

Journal of Prosthodontics

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Purpose:To measure overall intaglio dimensional and tube deviations of implant guides printed at 50 and 100 µm layer thickness at 0°, 45°, and 90°angulation using a stereolithographic (SLA) printer. Materials and Methods: A surgical implant guide design from a subject missing a maxillary right central incisor, used as the original standard tessellation language (STL) were stereolithographically fabricated at each thickness and angulation, 50 and 100 µm layer thickness at 0°, 45°, and 90°angulation (n = 10 each group). The guide was then scanned using cone beam computed tomography. The digital imaging and communications in medicine (DICOM) scanned files were then converted to an STL format. The overall dimensional deviations of the intaglio surface and the positioning of the implant guide tube were then superimposed onto the original designed STL file using best-fitting alignment. A t-test and an F-test as well as ANOVA followed by a post hoc t-test were used to determine statistical significant differences (α = 0.05) for the intaglio surface and guide tube deviation, respectively. Results: The overall intaglio surface discrepancies (µm) printed at 0°, 45°, and 90°w ere 55.07 ± 1.36, 52.39 ± 2.09, and 61.02 ± 15.96 for 50 µm layer; and 98.38 ± 10.55, 84.47 ± 10.61, and 90.26 ± 5 for 100 µm layer with statistically significant differences for both t-test and F-test, p < 0.001. The maximal guide tube linear deviations (µm) printed at 0°, 45°, and 90°were 10.78 ± 3.84, 8.16 ± 3.68, and 12.57 ± 5.39 for 50 µm layer (ANOVA, p = 0.096); and 10.95 ± 5.23, 16.79 ± 4.97, and 22.63 ± 2.81 for 100 µm layer (ANOVA, p < 0.001). The maximal guide tube angular deviations (°) printed at 0°, 45°, and 90°were 1.29 ± 0.30, 0.64 ± 0.13, and 0.56 ± 0.21 for 50 µm layer (ANOVA, p < 0.001); and 1.57 ± 0.29, 0.86 ± 0.14, and 1.02 ± 0.31 for 100 µm layer (ANOVA, p = 0.034). There was a statistical difference in the deviations between 50 and 100 µm layer printing in all printed angulations except at 0°(t-test, p = 0.05, p = 0.03, and p = 0.001 for 0°, 45°, and 90°) and linear deviations (t-test, p < 0.001, p = 0.009, and p = 0.001 for 0°, 45°, and 90°). Conclusion: Printing at 50 µm layer reduces dimensional intaglio deviations in general and reduces tube angular deviations with different angulations of printing. However, the deviations were only ß60 to 100 µm for the intaglio dimension deviations; and ß0.04 to 0.26 mm and ß0.25°to ß2°for tube deviations.Guided implant surgery promises accurate placement of dental implants to ensure optimal esthetics and function of definitive restorations and longevity of osseointegrated implants. 1,2 Advancements in cone-beam computed tomography (CBCT) and computer-aided implant treatment planning simplify implant treatment planning and implant guide design. 3,4 Recent introduction of desktop 3D printing allows clinicians to fabricate implant surgical guides for guided implant surgery in office.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 88%

mentioning

confidence: 99%

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Intaglio Surface Dimension and Guide Tube Deviations of Implant Surgical Guides Influenced by Printing Layer Thickness and Angulation Setting

Dalal

Ammoun

Abdulmajeed

et al. 2020

Journal of Prosthodontics

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“…The printing direction was reported to affect mechanical properties of printable resin materials [24]. This issue also applies to the surface characteristics of additively manufactured denture bases.…”

Section: Discussionmentioning

confidence: 98%

Surface Characteristics of Milled and 3D Printed Denture Base Materials Following Polishing and Coating: An In-Vitro Study

et al. 2020

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(1) Background: To date, no information on the polishability of milled and 3D-printed complete denture bases has been provided, which is relevant in terms of plaque accumulation. (2) Methods: three groups (n = 30) were manufactured using the cold-polymerization polymethilmethacrilate, milling (SM) and 3D printing (AM). 10 specimens of each group were left untreated (reference). 10 more specimens were pre-polished (intermediate polishing) and 10 final specimens were highgloss polished. An additional 20 specimens were 3D printed and coated with the liquid resin (coated), 10 of which were additionally polished (coated + polished). For each group Ra and Rz values, gloss value and REM images were obtained. (3). The “highgloss-polished” specimens showed statistically lower Ra and Rz values in the SM, followed by AM and conventional groups. In the AM group statistically lower surfaces roughness was revealed for highgloss-polished, “coated + polished”, and “coated” specimens, respectively. (4) Conclusions: The milled specimens demonstrated superiors surface characteristics than 3D printed and conventionally produced after polishing. The polished specimens demonstrated superior surface characteristics over coated specimens. However, the surface roughness by both polished and coated specimens was within the clinically relevant threshold of 0.2 µm.

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“…High dimensional accuracy is extremely important in the field of biomedicine and dentistry. Alexey et al [ 82 ], conducted a comprehensive study on the following printing parameters: building orientation, positioning, and curing, and their influence on the overall dimensional accuracy of 119 SLA printed parts. According to the findings, these parameters influence accuracy and the strength of parts.…”

Section: Description Of the Properties Of Printed Parts That Are Imentioning

confidence: 99%

Application of Stereolithography Based 3D Printing Technology in Investment Casting

2020

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Advanced methods for manufacturing high quality parts should be used to ensure the production of competitive products for the world market. Investment casting (IC) is a process where a wax pattern is used as a sacrificial pattern to manufacture high precision casting of solid metal parts. Rapid casting is in turn, a technique that eases the IC process by combining additive manufacturing (AM) technologies with IC. The use of AM technologies to create patterns for new industrial products is a unique opportunity to develop cost-effective methods for producing investment casting parts in a timely manner. Particularly, stereolithography (SLA) based AM is of interest due to its high dimensional accuracy and the smooth surface quality of the printed parts. From the first appearance of commercially available SLA printers in the market, it took a few decades until desktop SLA printers became available to consumers at a reasonable price. Therefore, the aim of this review paper is to analyze the state-of-the-art and applicability of SLA based 3D printing technology in IC manufacturing, as SLA based AM technologies have been gaining enormous popularity in recent times. Other AM techniques in IC are also reviewed for comparison. Moreover, the SLA process parameters, material properties, and current issues are discussed.

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Objects build orientation, positioning, and curing influence dimensional accuracy and flexural properties of stereolithographically printed resin

Cited by 264 publications

References 24 publications

Intaglio Surface Dimension and Guide Tube Deviations of Implant Surgical Guides Influenced by Printing Layer Thickness and Angulation Setting

Intaglio Surface Dimension and Guide Tube Deviations of Implant Surgical Guides Influenced by Printing Layer Thickness and Angulation Setting

Surface Characteristics of Milled and 3D Printed Denture Base Materials Following Polishing and Coating: An In-Vitro Study

Application of Stereolithography Based 3D Printing Technology in Investment Casting

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