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| Author/year | Method used | Study objectives | Outcomes |
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| Kasuga et al./2011 | Hardness values in Shore A durometer | Compare fluorinated monomer soft lining materials, conventional | No hardness difference, experimental fluorinated soft lining materials, Molloplast B |
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| Mese and Guzel/2008 | Hardness values in Shore A durometer | Storage duration on tensile bond strength and hardness, acrylic resin and silicone liners | Hardness, higher with increased duration of immersion |
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| Santawisuket al./2013 | Hardness values in Shore A durometer | Tensile strength, tear resistance, and hardness of experimental silicone elastomers (ESE) | Hardness, ESE increased with amount of silica filler (from 6 to 10 phr) |
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| Kutlu et al./2016 | Surface roughness tester | Sealer coating, roughness of soft lining | Roughness, methacrylate-based liners increased, denture cleanser. Sealer coating, no effect, roughness |
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| Mante et al./2008 | Hardness values in Shore A durometer | PermaSeal, hardness of soft reline | Sealer reduced saliva softening effect, methacrylate-based soft reline |
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| Kim et al./2014 [33] | Hardness values in Shore A durometer | Hardness and bond strength of long-term soft denture lining | Hardness, 28-day increased compared to 24-hour |
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| Kanie et al./2009 | Hardness values in Shore A durometer | Evaluate experimental light-curing soft lining materials (ESLMs) | Hardness, UA-16, UV-32, and UV-35 similar to commercial denture liner |
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| Badaró et al./2017 | Hardness values in Shore A durometer and surface roughness tester | R. communis dentifrice (10%) on abrasiveness, hardness, and color change of a denture liner | Weight loss, roughness similar to Corega. Colgate, Corega Brite, roughness from 0.26 to 0.34 μm. Brushing, no effect, hardness |
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| Dayrell et al./2012 | Surface roughness tester | Sealer coating, bond strength and roughness of liners | Palaseal coating, no effect, liners roughness. Without sealer coating, no difference observed on roughness |
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| Machado et al./2012 | Surface roughness tester | Roughness of denture resin, hard and resilient lining materials | No differences, initial roughness, Lucitone, Sofreliner, Tokuyama Rebase II, and New Truliner. Immersion 4%, chlorhexidine increased roughness. Ufi Gel Hard and Sofreliner, after 1 and 2 disinfection cycles |
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| Cazacu et al./2009 | Hardness values in Shore A durometer | Heat curable silicone, tested as a liner | Hardness, 59 ShA |
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| Mainieri et al./2011 | Surface roughness tester | Roughness, soft liners with and without surface sealer after brushing | Roughness, sealed COE-SOFT increased baseline, 1 month. Ufi-Gel with and without sealer coating, after 6 months |
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| Machado et al./2011 | Surface roughness tester | Roughness denture, hard and resilient lining materials | Roughness, Tokuyama Rebase II and Ufi Gel Hard similar or > New Truliner. Lucitone and Tokuyama Rebase II, no affected immersion desinfection |
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| Mancuso et al./2012 | Hardness values in Shore A durometer | Ageing effect, hardness, absorption, solubility, and color denture liners | Thermocycling influenced hardness |
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| Leite et al./2010 | Hardness values in Shore A durometer | Hardness values | Thermal cycling increased hardness, Elite Soft. Decrease for Kooliner |
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| Pisani et al./2012 | Hardness values in Shore A durometer and surface roughness tester | Color stability, hardness and roughness, denture liners cleansers’ immersion | Hardness increased. Hypochlorite altered hardness. Elite Soft, highest roughness |
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| Bertolini et al./2014 | Hardness values in Shore A durometer | Hardness, chlorhexidine diacetate or chlorhexidine hydrochloride soft lining | Hardness, no changes, antimicrobial agents |
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| Chladek et al./2013 | Hardness values in Shore A durometer | Mechanical changes denture liners, silver nanoparticle | Hardness, greater 25 Sh. A, 10 ppm, 40 ppm |
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| Urban et al./2014 | Hardness values in Shore A durometer and surface roughness tester | Hardness and roughness, liners with antimicrobial | Softone roughness increased, miconazole and chlorhexidine. Trusoft did not increase. Hardness and roughness, little changes |
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