Effect of thermo-cycling on microhardness of CAD-CAM provisional materials

Başak, Selver Suna; Özmen, Mehmet Fatih; Sağsöz, Ömer; Bayındır, Funda

doi:10.22271/oral.2020.v6.i4d.1075

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…Similar to previous reports, 23 28 in the present study, CAD-CAM provisional restorative materials are statistically affected by thermocycling 28 and bis-acryl resin composite materials exhibited superior microhardness over traditional methyl methacrylate resins. 29 In another study, Digholkar et al 30 reported the highest microhardness of provisionals produced by 3D printing over CAD-CAM PMMA milling and conventional method.…”

Section: Discussionsupporting

confidence: 89%

Comparison of fracture strength, surface hardness, and color stain of conventionally fabricated, 3D printed, and CAD-CAM milled interim prosthodontic materials after thermocycling

Yıldırım,

Aykent,

Özdoğan

2024

J Adv Prosthodont

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PURPOSE The purpose of this in vitro study was to investigate the fracture resistance, surface hardness, and color stain of 3D printed, CAD-CAM milled, and conventional interim materials. MATERIALS AND METHODS A total of 80 specimens were fabricated from auto polymerizing polymethyl methacrylate (PMMA), bis-acryl composite resin, CAD-CAM polymethyl methacrylate resin (milled), and 3D printed composite resin (printed) (n = 20). Forty of them were crown-shaped, on which fracture strength test was performed (n = 10). The others were disc-shaped specimens (10 mm × 2 mm) and divided into two groups for surface hardness and color stainability tests before and after thermal cycling in coffee solution (n = 10). Color parameters were measured with a spectrophotometer before and after each storage period, and color differences (CIEDE2000 [DE 00 ]) were calculated. The distribution of variables was measured with the Kolmogorov Smirnov test, and one-way analysis of variance (ANOVA), Tukey HSD, Kruskal-Wallis, Mann-Whitney U tests were used in the analysis of quantitative independent data. Paired sample t-test was used in the analysis of dependent quantitative data ( P < .05). RESULTS The highest crown fracture resistance values were determined for the 3D printed composite resin ( P < .05), and the lowest were observed in the bis-acryl composite resin ( P < .05). Before and after thermal cycling, increase in mean hardness values were observed only in 3D printed composite resin ( P < .05) and the highest ΔE 00 value were observed in PMMA resin for all materials ( P < .05). CONCLUSION 3D printing and CAD-CAM milled interim materials showed better fracture strength. After the coffee thermal cycle, the highest surface hardness value was again found in 3D printing and CAD-CAM milled interim samples and the color change of the bis-acryl resin-based samples and the additive production technique was higher than the PMMA resin and CAD-CAM milled resin samples.

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Section: Discussionsupporting

confidence: 89%

Comparison of fracture strength, surface hardness, and color stain of conventionally fabricated, 3D printed, and CAD-CAM milled interim prosthodontic materials after thermocycling

Yıldırım,

Aykent,

Özdoğan

2024

J Adv Prosthodont

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“…As the combined use of chewing simulation and thermocycling is a well-documented method to mimic clinical situations [ 30 ], 10/20 FDPs were exposed to thermal and mechanical loading. Based on the assumption that a chewing simulation with 1.2 million cycles corresponds to a wearing time of approximately five years [ 31 ], a clinical use of two years for a long-term temporary restoration was simulated in this study.…”

Section: Materials Experimental Procedures and Methodsmentioning

confidence: 99%

CAD/CAM Resin-Based Composites for Use in Long-Term Temporary Fixed Dental Prostheses

et al. 2021

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The aim of this in vitro study was to analyse the performance of CAD/CAM resin-based composites for the fabrication of long-term temporary fixed dental prostheses (FDP) and to compare it to other commercially available alternative materials regarding its long-term stability. Four CAD/CAM materials [Structur CAD (SC), VITA CAD-Temp (CT), Grandio disc (GD), and Lava Esthetic (LE)] and two direct RBCs [(Structur 3 (S3) and LuxaCrown (LC)] were used to fabricate three-unit FDPs. 10/20 FDPs were subjected to thermal cycling and mechanical loading by chewing simulation and 10/20 FDPs were stored in distilled water. Two FDPs of each material were forwarded to additional image diagnostics prior and after chewing simulation. Fracture loads were measured and data were statistically analysed. SC is suitable for use as a long-term temporary (two years) three-unit FDP. In comparison to CT, SC featured significantly higher breaking forces (SC > 800 N; CT < 600 N) and the surface wear of the antagonists was (significantly) lower and the abrasion of the FDP was similar. The high breaking forces (1100–1327 N) of GD and the small difference compared to LE regarding flexural strength showed that the material might be used for the fabrication of three-unit FDPs. With the exception of S3, all analysed direct or indirect materials are suitable for the fabrication of temporary FDPs.

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Effect of thermo-cycling on microhardness of CAD-CAM provisional materials

Cited by 2 publications

References 21 publications

Comparison of fracture strength, surface hardness, and color stain of conventionally fabricated, 3D printed, and CAD-CAM milled interim prosthodontic materials after thermocycling

Comparison of fracture strength, surface hardness, and color stain of conventionally fabricated, 3D printed, and CAD-CAM milled interim prosthodontic materials after thermocycling

CAD/CAM Resin-Based Composites for Use in Long-Term Temporary Fixed Dental Prostheses

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