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Surface Roughness of Acrylic and Silicone‐Based Soft Liners: In Vivo Study in a Rat Model
Author(s) -
Bail Michele,
Jorge Janaina Habib,
Urban Vanessa Migliorini,
Campanha Nara Hellen
Publication year - 2014
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.12074
Subject(s) - silicone , surface roughness , materials science , composite material , acrylic resin , in vivo , surface finish , coating , biology , microbiology and biotechnology
Purpose The aim of this in vivo animal study was to investigate changes in the surface roughness of soft liners over time. Materials and Methods Forty adult Wistar rats ( Rattus norvergicus albinus ) were fitted with acrylic custom‐made palatal plates relined by dynamic impressions and tested with the following soft liners: Dentuflex (DF), Trusoft (TS), Dentusoft (DS), and Ufi Gel P (UG). Half of the animals for each tested material had the plates fitted during the material reline procedure. Their surface roughness was read immediately (IRa group, n = 5). The other half used the palatal plates for 14 days before roughness readings were performed (FRa group, n = 5). The surface roughness (Ra) of the inner surface from the relined dentures was recorded using a Surftest SJ‐401 with eight readings per specimen, and mean values were obtained. Data (μm) were analyzed by two‐way ANOVA and Tukey's test (α = 0.05). Results IRa means (2.92 ± 0.87 μm) and FRa means (3.35 ± 0.65 μm) were significantly different ( p = 0.016). UG showed a lower ( p = 0.01) Ra mean (2.1 ± 0.52 μm) than DF (3.94 ± 0.81 μm), TS (4.12 ± 0.64 μm), and DS (3.27 ± 0.64 μm). Conclusions Ufi Gel P showed the smoothest surface among the materials evaluated. The period of use resulted in changes in the surface roughness of the materials tested.