Surface Roughness and Color Stability of 3D-Printed Denture Base Materials after Simulated Brushing and Thermocycling.

Çakmak, Gülce; Molinero-Mourelle, Pedro; Silva de Paula, Marcella; Akay, Canan; Cuellar, Alfonso Rodriguez; Donmez, Mustafa Borga; Yilmaz, Burak (2022). Surface Roughness and Color Stability of 3D-Printed Denture Base Materials after Simulated Brushing and Thermocycling. Materials, 15(18) Molecular Diversity Preservation International MDPI 10.3390/ma15186441

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Three-dimensional (3D) printing is increasingly used to fabricate denture base materials. However, information on the effect of simulated brushing and thermocycling on the surface roughness and color stability of 3D-printed denture base materials is lacking. The aim of this study was to evaluate the effect of brushing and thermocycling on the surface roughness and color stability of 3D-printed denture base materials and to compare with those of milled and heat-polymerized denture base resins. Disk-shaped specimens (Ø 10 mm × 2 mm) were prepared from 4 different denture base resins (NextDent Denture 3D+ (ND); Denturetec (SC); Polident d.o.o (PD); Promolux (CNV)) (n = 10). Surface roughness (Ra) values were measured before and after polishing with a profilometer. Initial color coordinates were measured by using a spectrophotometer after polishing. Specimens were then consecutively subjected to simulated brushing (10,000 cycles), thermocycling (10,000 cycles), and brushing (10,000 cycles) again. Ra and color coordinates were measured after each interval. Color differences (ΔE00) between each interval were calculated and these values were further evaluated considering previously reported perceptibility (1.72 units) and acceptability (4.08 units) thresholds. Data were analyzed with Friedman, Kruskal-Wallis, and Mann-Whitney U tests (α = 0.05). Ra (p ≥ 0.051) and ΔE00 (p ≥ 0.061) values among different time intervals within each material were similar. Within each time interval, significant differences in Ra (p ≤ 0.002) and ΔE00 values (p ≤ 0.001) were observed among materials. Polishing, brushing, and thermocycling resulted in acceptable surface roughness for all materials that were either similar to or below 0.2 µm. Color of ND printed resin was affected by brushing and thermocycling. All materials had acceptable color stability when reported thresholds are considered.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine
04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology
04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry

UniBE Contributor:

Cakmak, Gülce, Molinero Mourelle, Pedro, Silva de Paula, Marcella, Dönmez, Mustafa-Borga, Yilmaz, Burak

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1996-1944

Publisher:

Molecular Diversity Preservation International MDPI

Language:

English

Submitter:

Pubmed Import

Date Deposited:

26 Sep 2022 13:53

Last Modified:

05 Dec 2022 16:25

Publisher DOI:

10.3390/ma15186441

PubMed ID:

36143757

Uncontrolled Keywords:

3D printing color stability denture base surface roughness thermocycling

BORIS DOI:

10.48350/173235

URI:

https://boris.unibe.ch/id/eprint/173235

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