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- Title
Hardness, compressive strength and resilience of complete denture lining materials: an in situ study.
- Authors
de CARVALHO JUNIOR, Hugo; de CARVALHO, Vítor Hugo Marçal; BASTING, Roberta Tarkany
- Abstract
Objective: The aim of this study was to evaluate the in situ hardness, compressive strength and resilience of soft lining materials used in total removable prostheses in different time intervals. Methods: A total of 48 rectangular test specimens (10 x 3 x 2 mm) were fabricated of each of the polyvinylsiloxane-based soft liner (Mucopren Soft) and acrylic resin-based material (Trusoft), which were placed on total removable prostheses bases of 12 volunteers (n = 12). The hardness (Shore A), compressive strength (in MPa) and resilience (in Kgf/cm²) were evaluated in different time intervals: 0, 7, 30 and 60 days, at three different locations of the specimens surface. Results: The two-way ANOVA and Tukey test showed that the polyvinylsiloxane-based soft liner presented higher hardness values (p = 0.0113) and higher compressive strength (p=0.0252) than the acrylic resin-based material at immediate and 7 days evaluations. The polyvinylsiloxane-based soft liner presented higher resilience values than the acrylic resin-based material at all times (p = 0.0133). Hardness and compressive strength were similar for both materials at 30 and 60 days evaluations. Conclusions: For both materials, there was a tendency for an increase of hardness, compressive strength and resilience over time, influenced by the composition of the tissue conditioner. The polyvinylsiloxane-based soft liner presented higher hardness, compressive strength and resilience than the acrylic resin-based material, specially considering a long-term evaluation up to 60 days.
- Subjects
COMPRESSIVE strength; COMPLETE dentures; HARDNESS; TWO-way analysis of variance; MATERIALS
- Publication
RGO: Revista Gaúcha de Odontologia, 2020, Vol 68, p1
- ISSN
0103-6971
- Publication type
Article
- DOI
10.1590/1981-86372020000042018-0065