Effect of post-curing time on the color stability and related properties of a tooth-colored 3D-printed resin material

Lee, Eun-Hyuk; Ahn, Jin-Soo; Lim, Young‐Jun; Kwon, Ho-Beom; Kim, Myung‐Joo

doi:10.1016/j.jmbbm.2021.104993

Cited by 32 publications

(27 citation statements)

References 54 publications

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“…However, hardness was increased with increasing post-curing time. In agreement with Lee et al,’s finding [ 40 ], the increase in hardness value in the group with 120 post-curing times may be attributed to the polymerization rate and the degree of conversion. Based on the results of the present study, a direct relation between the hardness and the post-curing time was reported as the hardness was significantly increased when the post-curing time increased [ 5 ].…”

Section: Discussionsupporting

confidence: 92%

“…As per tested material, there was no significant effect with combined printing orientations and post-curing time, which confirmed that both factors have no remarkable effects on the surface roughness of DBRs. The fact behind the post-curing time is based on the degree of monomer conversion, which finally improved the printed object properties, as reported by Lee et al, [ 40 ]. Lee et al, [ 40 ] confirmed that post-curing time increased the degree of monomer conversion.…”

Section: Discussionmentioning

confidence: 77%

“…The fact behind the post-curing time is based on the degree of monomer conversion, which finally improved the printed object properties, as reported by Lee et al, [ 40 ]. Lee et al, [ 40 ] confirmed that post-curing time increased the degree of monomer conversion. However, this fact was not significantly proven in the present study, but a slight decrease in Ra with the ND/45 and ND/90 groups as the post-curing time increased insignificantly.…”

Section: Discussionmentioning

confidence: 77%

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Comparative Evaluation of Surface Roughness and Hardness of 3D Printed Resins

et al. 2022

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The effect of printing parameters on the surface characteristics of three-dimensional (3D)-printed denture base resins (DBRs) is neglected. Therefore, this study investigated the effect of printing orientation and post-curing time on the surface roughness and hardness. One conventional heat-polymerized (HP) resin and two 3D-printing resins (NextDent (ND) and ASIGA (AS)) were used to fabricate a total of 250-disc (10 × 2.5 mm) specimens. ND and AS specimens were printed with different orientations (0-, 45-, and 90-degree) and each orientation group was subjected to four post-curing times (30, 60, 90, 120 min). Printed specimens were thermo-cycled (10,000 cycles) followed by the measuring of surface roughness (Profilometer (Ra)) and hardness (a Vickers hardness (VH)). ANOVA and post hoc tests were used for data analysis (α = 0.05) at significant levels. AS and ND showed no significant changes in Ra when compared with HP (p ˃ 0.05), except the 45-degree orientation (AS/90 min and AS/120 min) significantly increased surface roughness (p ˂ 0.001). There was no significant difference in Ra with different orientations and post-curing time for both materials AS and ND (p ˃ 0.05). Compared with HP, 3D-printed DBRs showed low VH values (p ˂ 0.001). For AS, 90-degree orientation showed a significant decrease in VH at 60, 90, and 120 min when compared with 0- and 45-degree orientation (p ˂ 0.001), while ND showed no significant difference in VH with different printing orientations (p ˃ 0.05). The VH of AS and ND improved when increasing post-curing time to 120 min (p ˂ 0.001), and the printing orientations and post-curing time did not affect the Ra of 3D-printed DBRs.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 77%

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Comparative Evaluation of Surface Roughness and Hardness of 3D Printed Resins

et al. 2022

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“…In a previous study, it was detected that the decrease in the contact angle in accordance with the increase of the post-curing time was related to the decrease in ΔE 00 values in coffee and red vine. 25 Although the statistical difference was detected among the ΔE 00 values of the samples in the coffee solution, the contact angle did not differ statistically in the recent study we held. These outcomes may be attributed to the differences between the methodologies of the previous studies and the recent study.…”

Section: Discussioncontrasting

confidence: 57%

Comparing the physical and mechanical properties of different biocompatible three‐dimensional resin materials in possible use of dental appliances: An in vitro study

Aksoy

Topsakal

Bal

et al. 2023

Orthod Craniofacial Res

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ObjectiveThis study aimed to assess the colour stability, water sorption, microhardness and water contact angle of two different 3D printing systems (SLA and DLP) in a possible use of producing paediatric and orthodontic dental appliances.Materials and MethodsSLA and DLP printer systems produced a total of 160 disk samples with a diameter of 15.00 mm and a height of 2.00 mm. Colour changes of 64 samples were assessed in distilled water, coffee, coke and cherry juice and Vicker's microhardness tests were also conducted. Solubility and water sorption were held following the water contact angle assessment. Statistical analyses were performed using the SPSS software. Mann–Whitney‐U test, Friedman test and Bonferroni post hoc Multiple Comparison Test were performed.ResultsIn DLP and SLA groups, coffee had a statistically significant colouring effect regarding the assessment periods (P = .001, 20.09 ± 2.96, 22.09 ± 3.51, respectively), and the discolouration effect of coffee was higher in the SLA group at all endpoints (P < .05). At the same time, DLP was more affected by coke solution in T0‐T1 and T0‐T7 (P < .05). The values of water sorption showed statistically significant differences in the group of DLP compared to the SLA (P = .01, 121.11 ± 10.54, 92.78 ± 8.70, respectively). No statistical significance was detected between the solubility values and water contact angle of SLA and DLP groups. The SLA printer's microhardness values revealed statistically significantly higher values than the DLP group (P = .001) and a decrease was detected following the immersion period in the microhardness values of the SLA group (P = .022).ConclusionThe compared groups exposed to staining solutions revealed colour changes above the clinically acceptable values at all periods (ΔE00 = 2.25).

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“…Data from the literature considered that the degradation of composite resins is caused by the chemical degradation of polymers following the penetration of water into its structure and the consequent release of oligomers and monomers through the pores created by mechanical wear [ 5 ]. It was found that, initially, there is a superficial degradation of the polymer, and later the surface roughness increases by the appearance of cracks due to increased osmotic pressure at the interface between the organic matrix and filler particles, respectively, due to hydrolytic degradation of silane [ 23 , 24 , 25 , 26 , 27 ].…”

Section: Discussionmentioning

confidence: 99%

The Influence of Abrasive and Acidic Aggressions on the Surface Condition of Flowable Composite Resin

et al. 2022

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The aim of this in vitro study was to evaluate the effect of hydrochloric acid associated with the abrasive effect of toothbrushing on the surface condition of three flowable composite resins used for direct restoration. Seventy samples of each composite resin: Grandio Flow (VOCO, Germany)—group A, Filtek Ultimate Flow (3M-ESPE, MN, USA)—group B, G-aenial Flo X (GC Europe)—group C were prepared, submersed in hydrochloric acid 30% for 60 min and then submitted to simulated toothbrushing procedure using 5000 cycles with toothbrushes with medium and hard bristles, immediately after the chemical attack, after 30 min or without any chemical attack. The sample’s surface roughness was analyzed using a noncontact profilometer (Dektak XT, Bruker, USA). ANOVA and post hoc Bonferroni tests, with a p < 0.05, were used to analyze the values. Hydrochloric acid action for 60 min and six months of toothbrushing using toothbrushes having medium hardness or firm bristles affects the surface roughness of tested flowable composite resins. Toothbrushing with firm bristles immediately after acidic challenge determines increased surface roughness for two of the three flowable composite resins (Grandio Flow and Filtek Ultimate Flow). Toothbrushing with medium or firm bristles thirty minutes after the acidic aggression determine no effect on surface condition of flowable composite resins.

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Effect of post-curing time on the color stability and related properties of a tooth-colored 3D-printed resin material

Cited by 32 publications

References 54 publications

Comparative Evaluation of Surface Roughness and Hardness of 3D Printed Resins

Comparative Evaluation of Surface Roughness and Hardness of 3D Printed Resins

Comparing the physical and mechanical properties of different biocompatible three‐dimensional resin materials in possible use of dental appliances: An in vitro study

The Influence of Abrasive and Acidic Aggressions on the Surface Condition of Flowable Composite Resin

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