Photo-curing 3D printing technique and its challenges

Quan, Haoyuan; Zhang, Ting; Xu, Hang; Luo, Shen; Nie, Jun; Zhu, Xiaoqun

doi:10.1016/j.bioactmat.2019.12.003

Cited by 666 publications

(564 citation statements)

References 15 publications

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“…MJ, similar to vat polymerisation techniques (SLA, DLP and CLIP) employs photopolymerisation. This technique allows for deposition of liquid photosensitive resin through multiple jet heads on a platform, which is then cured by UV light [ 12 ]. As opposed to SLA and DLP, this technique requires no post-curing.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

Etemad-Shahidi

Qallandar

Evenden

et al. 2020

JCM

120

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The use of additive manufacturing in dentistry has exponentially increased with dental model construction being the most common use of the technology. Henceforth, identifying the accuracy of additively manufactured dental models is critical. The objective of this study was to systematically review the literature and evaluate the accuracy of full-arch dental models manufactured using different 3D printing technologies. Seven databases were searched, and 2209 articles initially identified of which twenty-eight studies fulfilling the inclusion criteria were analysed. A meta-analysis was not possible due to unclear reporting and heterogeneity of studies. Stereolithography (SLA) was the most investigated technology, followed by digital light processing (DLP). Accuracy of 3D printed models varied widely between <100 to >500 μm with the majority of models deemed of clinically acceptable accuracy. The smallest (3.3 μm) and largest (579 μm) mean errors were produced by SLA printers. For DLP, majority of investigated printers (n = 6/8) produced models with <100 μm accuracy. Manufacturing parameters, including layer thickness, base design, postprocessing and storage, significantly influenced the model’s accuracy. Majority of studies supported the use of 3D printed dental models. Nonetheless, models deemed clinically acceptable for orthodontic purposes may not necessarily be acceptable for the prosthodontic workflow or applications requiring high accuracy.

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Section: Introductionmentioning

confidence: 99%

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

Etemad-Shahidi

Qallandar

Evenden

et al. 2020

JCM

120

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“…Surgical guides made from resin-based materials using the stereolithography (SLA) or digital light processing (DLP) technique are mostly used in daily clinical routine [14] also for skeletal anchorage purposes [15]. Using SLA for printing, multiple layers of fluid resin are successively photopolymerized by selective ultraviolet (UV) laser radiation (λ = 350-450 nm) allowing the creation of highly accurate objects [16] with fine grained complex geometries [17]. However, increased manufacturing costs and time-consuming post processing procedures are necessary for manufacturing SLA printed surgical guides, and potential debris by means of detached resin particles are likely to affect the surgical site.…”

Section: Introductionmentioning

confidence: 99%

How Accurate Is Oral Implant Installation Using Surgical Guides Printed from a Degradable and Steam-Sterilized Biopolymer?

Pieralli

Spies

Hromadnik

et al. 2020

JCM

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3D printed surgical guides are used for prosthetically-driven oral implant placement. When manufacturing these guides, information regarding suitable printing techniques and materials as well as the necessity for additional, non-printed stock parts such as metal sleeves is scarce. The aim of the investigation was to determine the accuracy of a surgical workflow for oral implant placement using guides manufactured by means of fused deposition modeling (FDM) from a biodegradable and sterilizable biopolymer filament. Furthermore, the potential benefit of metal sleeve inserts should be assessed. A surgical guide was designed for the installation of two implants in the region of the second premolar (SP) and second molar (SM) in a mandibular typodont model. For two additive manufacturing techniques (stereolithography [SLA]: reference group, FDM: observational group) n = 10 surgical guides, with (S) and without (NS) metal sleeves, were used. This resulted in 4 groups of 10 samples each (SLA-S/NS, FDM-S/NS). Target and real implant positions were superimposed and compared using a dedicated software. Sagittal, transversal, and vertical discrepancies at the level of the implant shoulder, apex and regarding the main axis were determined. MANOVA with posthoc Tukey tests were performed for statistical analyses. Placed implants showed sagittal and transversal discrepancies of <1 mm, vertical discrepancies of <0.6 mm, and axial deviations of ≤3°. In the vertical dimension, no differences between the four groups were measured (p ≤ 0.054). In the sagittal dimension, SLA groups showed decreased deviations in the implant shoulder region compared to FDM (p ≤ 0.033), whereas no differences in the transversal dimension between the groups were measured (p ≤ 0.054). The use of metal sleeves did not affect axial, vertical, and sagittal accuracy, but resulted in increased transversal deviations (p = 0.001). Regarding accuracy, biopolymer-based surgical guides manufactured by means of FDM present similar accuracy than SLA. Cytotoxicity tests are necessary to confirm their biocompatibility in the oral environment.

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“…It is a vat photopolymerisation technique in which a laser beam is focused through the transparent vat, which contains a photocurable resin, inducing a polymerisation reaction and, eventually, transforming the liquid resin into a solid object with a previously designed 3D geometry. This building concept is one of the most versatile AM techniques as it allows to obtain thinner laminate layers, which leads to producing parts with low porosity [18]. Despite being limited by many factors such as poor mechanical properties [18], one of the highlighting applications of SLA lies in the field of tissue engineering applications [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…This building concept is one of the most versatile AM techniques as it allows to obtain thinner laminate layers, which leads to producing parts with low porosity [18]. Despite being limited by many factors such as poor mechanical properties [18], one of the highlighting applications of SLA lies in the field of tissue engineering applications [19,20]. For this reason, SLA has recently attracted research interest in obtaining composite materials with improved properties compared with pristine photocurable resins [21,22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterisation of Acrylic Resin-Al Powder Composites Suitable for Additive Manufacturing

et al. 2020

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Stereolithography is an additive manufacturing technology commonly used to build either prototypes or final parts. Nevertheless, the manufacture of structural parts has been ruled out owing to the poor mechanical properties of conventional UV-curable resins. Moreover, the inventory of available commercial resins is still limited and they exhibit low thermal and electrical conductivity values. In this work, some composite materials were designed using Al microparticles dispersed within an SLA commercial resin matrix. These composites overcame the difficulties caused by the light scattering effect during the photopolymerisation process in the SLA technology. Dispersion of the filler was characterised by means of SEM/EDX and AFM. The composites exhibited improved thermal and mechanical behaviour in comparison with the pristine resin. The simplicity of the synthesis method used to prepare the composites provides a convenient starting point to explore new ways of designing composites for SLA with improved mechanical and functional properties.

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Photo-curing 3D printing technique and its challenges

Cited by 666 publications

References 15 publications

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

How Accurate Is Oral Implant Installation Using Surgical Guides Printed from a Degradable and Steam-Sterilized Biopolymer?

Synthesis and Characterisation of Acrylic Resin-Al Powder Composites Suitable for Additive Manufacturing

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