Effects of multiple sterilizations and natural aging on the mechanical behavior of 3D-printed ABS

Popescu, Diana; Baciu, Florin; Vlasceanu, Daniel; Cotruț, Cosmin M.; Marinescu, Rodica

doi:10.1016/j.mechmat.2020.103423

Cited by 25 publications

(24 citation statements)

References 35 publications

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“…In contrast, PCM featured the highest porosity (6.71 ± 0.17 vol%) of all materials investigated, which correlated with the lowest bulk density. These results underline the studies conducted by Popescu et al [ 31 ], who quantified the air void content between 6.14 and 7.82 vol% for a similar product based on the same polymer mix. Dana et al [ 32 ] showed that the printing trajectory and the printing speed had a relevant influence on anisotropic pore structure.…”

Section: Discussionsupporting

confidence: 87%

Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?

et al. 2021

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The aim of the study was to investigate the effect of X-rays used in micro X-ray computer tomography (µXCT) on the mechanical performance and microstructure of a variety of dental materials. Standardised bending beams (2 × 2 × 25 mm3) were forwarded to irradiation with an industrial tomograph. Using three-dimensional datasets, the porosity of the materials was quantified and flexural strength was investigated prior to and after irradiation. The thermal properties of irradiated and unirradiated materials were analysed and compared by means of differential scanning calorimetry (DSC). Single µXCT measurements led to a significant decrease in flexural strength of polycarbonate with acrylnitril-butadien-styrol (PC-ABS). No significant influence in flexural strength was identified for resin-based composites (RBCs), poly(methyl methacrylate) (PMMA), and zinc phosphate cement (HAR) after a single irradiation by measurement. However, DSC results suggest that changes in the microstructure of PMMA are possible with increasing radiation doses (multiple measurements, longer measurements, higher output power from the X-ray tube). In summary, it must be assumed that X-ray radiation during µXCT measurement at high doses can lead to changes in the structure and properties of certain polymers.

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Section: Discussionsupporting

confidence: 87%

Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?

et al. 2021

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“…The sterilization methods adequate for different 3D-printing materials have been tested in terms of infection rate, mechanical performance, and dimensional stability, or, on the contrary, geometrical deformation (7,9,15,(19)(20)(21). Low-temperature hydrogen peroxide gas plasma has been an optimal sterilization procedure for printouts produced by FDP in ABS.…”

Section: Discussionmentioning

confidence: 99%

“…The authors stated the infection rate was comparable to that reported by others using traditional surgical techniques and sterilization processes (7). On the other hand, Popescu et al, in two different publications (7)(8)(9), have demonstrated that low-temperature gas plasma sterilization does not in uence the tensile and exural strength of ABS specimens (9) nor the dimensions of the geometrical features remained stable (8). However, it has been indicated that for more multifaceted structures, mostly containing large surfaces of low depth, sterilization with VH2O2 could signi cantly impact the accuracy (22).…”

Section: Discussionmentioning

confidence: 99%

“…One of the most frequently used manufacturing materials in FDM 3D printers is acrylonitrile-butadiene-styrene (ABS) (2,3,(6)(7)(8). ABS is a cost-effective polymer that is easy to manage; it has good resistance, strength, and stiffness (1,(3)(4)(5)9).…”

Section: Introductionmentioning

confidence: 99%

“…When intrasurgical manipulation is needed, the models and guides printed in ABS must be sterilized before entering the operating room (7)(8)(9)(10). The ABS devices can be sterilized by low-temperature hydrogen peroxide gas plasma (vaporized hydrogen peroxide, VH2O2), a method appropriate for sensitive instruments as the temperature cycles does not exceed 50 °C (7-10).…”

Section: Introductionmentioning

confidence: 99%

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Does Low-Temperature Sterilization Affect the Geometrical Properties of 3D Printed Models and Surgical Guides from a Reconstruction of CT Images using the Mimics Innovation Suite?

Toro¹,

Cardona²,

Restrepo³

et al. 2020

Preprint

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Background: Fused deposition anatomical models and surgical guides are the embodiment of digital surgical planning. Although the models are primarily produced for training or simulation, they often touch the patient tissues and fluids while the guides are always in close contact with the patient. Therefore, sterility is a requirement but not at the expense of losing dimensions and shape. In the present study, we assessed the effects of sterilization with vaporized hydrogen peroxide on the geometrical properties and accuracy of 3D-printed pieces reconstructed and processed using the Mimics Innovation Suite.Methods: computer tomography (CT) scan images from 16 patients were selected, eight from patients with maxillary and mandibular defects for the anatomical models, and eight from patients with mandibular defects for the cutting guides. The devices were manufactured in medical-grade acrylonitrile butadiene styrene from the primary files of the CT scans reconstructions. Two scanning processes were repeated after the production, one before and the other after sterilization. The dimensional error was estimated in each step of the process by comparing the scanned images of the printed pieces between before and after the sterilization process with the original design.Results: The average of the estimated mean differences between the printed pieces before and after sterilization were -0,011 ± 0,252 mm (95%CI -0,011; -0,010) for the models and 0,003 ± 0,057 mm (95%CI 0,002; 0,003) for the guides. Regarding the dimensional error of the sterilized parts compared to the original design, the estimated mean differences were -0,082 ± 0,626 mm (95%CI -0,083; -0,081) for the models and 0,126 ± 0,205 mm (95%CI 0,126; 0,127) for the cutting guides.Conclusion: The geometrical properties of the 3D-printed anatomical models and cutting guides designed with the Mimics Innovation Suite and manufactured in ABS was not affected after the process of low-temperature sterilization. The devices maintained dimensional stability after the sterilization but also showed high reliability relating to the original design.

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Dependence Between the Mechanical Characteristics of the Material and the FDM Sample Made From This Material

Raspopina

Perelygina

Shemetov

et al. 2021

Lecture Notes in Mechanical Engineering

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Effects of multiple sterilizations and natural aging on the mechanical behavior of 3D-printed ABS

Cited by 25 publications

References 35 publications

Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?

Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?

Does Low-Temperature Sterilization Affect the Geometrical Properties of 3D Printed Models and Surgical Guides from a Reconstruction of CT Images using the Mimics Innovation Suite?

Dependence Between the Mechanical Characteristics of the Material and the FDM Sample Made From This Material

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