Effects of post-curing conditions on degree of conversion, microhardness, and stainability of 3D printed permanent resins

BMC Oral Health, Journal Year: 2025, Volume and Issue: 25(1)

Published: Feb. 26, 2025

The aim of this in-vitro study is to investigate the effect post-curing time and units on degree conversion (DC), microhardness (VHN) staining susceptibility (∆E00) two 3D printed permanent resins (Crowntec (SCT), Varseosmile CrownPlus (VSP)). A total 180 disc-shaped samples (10*10*2 mm), 60 for each experiment, from tested materials (30 SCT, 30 VSP) were printer. Half post-cured in LC-3DPrint Box other half Phrozen Cure V2 divided into 3 subgroups according 5, 10 min (n = 5). DC was determined using a Fourier transform infrared spectrometer. VHN values measured with Vickers hardness tester. color initially spectrophotometer then again after one month coffee. ∆E00 calculated CIEDE2000 formula. Data obtained parameter examined analyzed by SPSS software One-Way ANOVA, post-hoc Tukey, Tamhane's T2, Independent-samples T test Pearson's correlation (α 0.05). While ​​of increased parallel time, decreased. highest (74.6 ± 3.8) (29.1 0.8) lowest (1.9 0.1) Box-30 group VSP. type statistically significant (p < 0.05) except SCT-5 SCT-30 groups. significantly higher at all times positive found between (r 0.796, p 0.001), while negative observed (r=-0.763, 0.001). demonstrated that extending led improvements microhardness, simultaneously reducing stainability tested. Additionally, unit used had impact these results, further highlighting importance both curing equipment optimizing material properties.

Language: Английский

Crack in Stereolithography: Material and surface characteristics based on DIC

Next research., Journal Year: 2025, Volume and Issue: unknown, P. 100323 - 100323

Published: April 1, 2025

Language: Английский

Effect of polydopamine surface treatment on the mechanical properties of zirconia and resin occlusal veneers fabricated using additive and subtractive manufacturing: An in vitro study

Journal of Dentistry, Journal Year: 2025, Volume and Issue: unknown, P. 105805 - 105805

Published: May 1, 2025

To evaluate the influence of polydopamine (PDA) treatment on bond strength, fracture, and wear resistance occlusal veneers (OVs) fabricated using additive (AM) subtractive manufacturing (SM) techniques. Three hundred twenty 0.5 mm-thick OVs were through AM SM from four groups materials (n=80): ceramic-filled resin (AM-C), zirconia (AM-Z), nano-ceramic (SM-C), (SM-Z). Each group was further divided into PDA-treated untreated subgroups (n=40). Specimens cemented onto dies self-curing cement (Multilink N; Ivoclar Vivadent) subjected to five million chewing cycles with thermal cycling. Fracture assessed a load-to-failure test 3D surface analysis, respectively (n=20). Additionally, strength evaluated pull-out Data analyzed three-way ANOVA assess main interaction effects material, technique, PDA (α=.05). Significant material type, found for all outcomes (p<.001), along significant × interactions. notably improved fracture in AM-Z AM-C (p<.05), but had minimal effect groups. Wear significantly reduced following while SM-C showed slight increase (p=.021). Among groups, demonstrated weakest overall mechanical performance. enhanced materials, limited ceramics. Milled best performance, consistently performed worst. Polydopamine enhances performance by manufacturing, particularly improving resistance. This approach may clinical reliability 3D-printed restorations, especially thin, conservative designs.

Language: Английский