Investigating the mechanical and optical properties of novel Urethandimethacrylate (UDMA) and Urethanmethacrylate (UMA) based rapid prototyping materials

Rosentritt, Martin; Huber, Christina; Strasser, Thomas; Schmid, Alois

doi:10.1016/j.dental.2021.08.009

Cited by 13 publications

(10 citation statements)

References 45 publications

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“…However, there were also exceptions in the resin-based composite group, since, e.g., materials with the same filler content (BC and ES; approximately 72%) showed differences of up to 25%. Filler type and size, as well as polymer composition or the chemical bonding of the fillers, may also affect materials' surface properties and explain the differences in materials with similar filler contents [12,[32][33][34]. A correlation between surface hardness and inorganic filler content [11] could also be observed for the materials investigated in this study.…”

Section: Discussionmentioning

confidence: 62%

“…Yet, with respect to the mechanical properties of CAD/CAM resin-based composites, previous research suggests a fairly inhomogeneous class of materials [11]. This is mostly attributed to different types, sizes, and amounts of inorganic fillers (approximately 60-85 wt%), as well as the organic matrix [12]. The significant differences in CAD/CAM resin materials, e.g., flexural strength (150-330 MPa) and modulus of elasticity (10.3-30.0 GPa), may have impacts under clinical conditions.…”

Section: Introductionmentioning

confidence: 99%

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Martens Hardness of CAD/CAM Resin-Based Composites

et al. 2022

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(1) Background: The properties of CAD/CAM resin-based composites differ due to differences in their composition. Instrumented indentation testing can help to analyze these differences with respect to hardness, as well as energy-converting capabilities due to viscoelastic behavior. (2) Methods: Eleven materials were investigated using instrumented indentation testing. Indentation depth (hr), Martens hardness (HM), indentation hardness (HIT), indentation modulus (EIT), the elastic part of indentation work (ηIT), and indentation creep (CIT) were investigated, and statistical analysis was performed using one-way ANOVA, Bonferroni post-hoc test, and Pearson correlation (α = 0.05). (3) Results: All of the investigated parameters revealed differences between the analyzed materials. Besides the differences in hardness-associated parameters (hr, HM, and HIT), instrumented indentation testing demonstrated differences in energy-converting properties. The subsequent one-way ANOVA revealed significant differences (p < 0.001). A significant (p < 0.01, Pearson correlation >0.576) correlation between the materials and HM, HIT, or EIT was identified. (4) Conclusions: Due to the differences found in the energy-converting properties of the investigated materials, certain CAD/CAM resin-based composites could show superior stress-breaking capabilities than others. The consequential reduction in stress build-up may prove to beneficial, especially for implant-retained restorations or patients suffering from parafunctions.

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Section: Discussionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Martens Hardness of CAD/CAM Resin-Based Composites

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“…The composite could release Ag + and improve the antibacterial properties while also maintaining non-toxicity. UDMA-based resins were also studied to develop the occlusal splint and crown applications (Figure 10(b)) [271,272]. Further attention to developing new manufacturing method was paid, and a polymer-infiltrated ceramic network (Figure 10(c)) was successfully developed through combining 3-D printing and dental resin infiltration technologies [273].…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Dental resin composites: A review on materials to product realizations

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Rajan

Farrar³

et al. 2022

Composites Part B: Engineering

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“…Photo-polymerization variables influence the structure and subsequent thermal response of dental resin matrices [74], and therefore, the degree of polymer polymerization or monomer release may be a key to the decrease in gloss and the increase in roughness and should be investigated in further studies. It is known that a combined heat and light-post-curing unit can improve the degree of conversion of 3D printed occlusal splints [75] and, e.g., hardness [38] or the in vitro performance [14,19].…”

Section: Roughnessmentioning

confidence: 99%

“…Therefore, in addition to the mechanical requirements, splints should also meet esthetic [16,17], phonetic, and functional [18] demands. Basic esthetic requirements include color stability and surface gloss [19]. Color changes can be caused by intrinsic and extrinsic factors [20] and are therefore influenced by the chemical structure and the surface of the splint.…”

Section: Introductionmentioning

confidence: 99%

Effects of storage and toothbrush simulation on color, gloss, and roughness of CAD/CAM, hand-cast, thermoforming, and 3D-printed splint materials

et al. 2022

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Objectives The aim was to investigate color, gloss, or roughness of splint materials after storage in liquids and toothbrush simulation. Materials and methods A total of 58 × 8 (n = 10 per material and group) specimens were fabricated (hand-cast, thermoforming, CAD/CAM-milled, 3D-printed materials); stored in air, water, coffee, red wine, and cleaning tablets; and investigated after fabrication, 24 h, two-, and four-week storage or toothbrushing. Color values (L*, a*, b*; ISO 11664–4:2008; CM–3500d, Konica-Minolta), gloss (ISO 2813:2014), and roughness values were determined (3D laser-scanning-microscope, KJ 3D, Keyence) before and after simulation or storage. Statistics: Levene-test, one-way ANOVA, Bonferroni post hoc test, between-subjects effects, Pearson correlation (α = 0.05). Results Color, gloss, and roughness altered due to contact with staining solutions/toothbrush simulation. Highest impact on color, gloss, and roughness presented the material followed by storage time (ΔE material (η2 = 0.239/p < 0.001), storage time (η2 = 0.179/p < 0.001); gloss (η2 = 0.751/p < 0.001) (η2 = 0.401/p < 0.001); Ra/Rz (η2 ≥ 0.801/p < 0.001) (η2 ≥ 0.416/p < 0.001)). Correlations were found between Rz and Ra (Pearson 0.887/p ≤ 0.001) or Rz and ΔE (0.517/p ≤ 0.001) or Ra and ΔE (0.460/p ≤ 0.001). Conclusions Storage and toothbrushing were accompanied by a change in color, gloss, and roughness. Almost all materials showed visible discoloration after 4 weeks of storage. Gloss values decreased as storage time increased. The initial roughness and polishability were better with harder materials. Clinical relevance. Milled and 3D printed splints show good color, gloss, and roughness resistance after 4-week storage or toothbrush application.

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Investigating the mechanical and optical properties of novel Urethandimethacrylate (UDMA) and Urethanmethacrylate (UMA) based rapid prototyping materials

Cited by 13 publications

References 45 publications

Martens Hardness of CAD/CAM Resin-Based Composites

Martens Hardness of CAD/CAM Resin-Based Composites

Dental resin composites: A review on materials to product realizations

Effects of storage and toothbrush simulation on color, gloss, and roughness of CAD/CAM, hand-cast, thermoforming, and 3D-printed splint materials

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