Publicação
Understanding the mechanical, surface, and color behavior of oral bioactive prosthetic polymers under biodegradation processes
| datacite.subject.fos | Ciências Médicas::Ciências da Saúde | |
| datacite.subject.sdg | 03:Saúde de Qualidade | |
| dc.contributor.author | Neves, Cristina B. | |
| dc.contributor.author | Costa, Joana | |
| dc.contributor.author | Portugal, Jaime | |
| dc.contributor.author | Bettencourt, Ana F. | |
| dc.date.accessioned | 2026-03-17T14:20:34Z | |
| dc.date.available | 2026-03-17T14:20:34Z | |
| dc.date.issued | 2023-06 | |
| dc.description.abstract | Changes in the properties of resin-based polymers exposed to the oral environment can emerge when chlorhexidine (CHX) is incorporated to develop bioactive systems for treating denture stomatitis. Three reline resins loaded with CHX were prepared: 2.5 wt% in Kooliner (K), 5 wt% in Ufi Gel Hard (UFI), and Probase Cold (PC). A total of 60 specimens were submitted to physical aging (1000 cycles of thermal fluctuations, 5–55 °C) or chemical aging (28 days of pH fluctuations in artificial saliva, 6 h at pH = 3, 18 h at pH = 7). Knoop microhardness (30 s, 98 mN), 3-point flexural strength (5 mm/min), and surface energy were tested. Color changes (ΔE) were determined using the CIELab system. Data were submitted to non-parametric tests (α = 0.05). After aging, bioactive K and UFI specimens were not different from the controls (resins without CHX) in mechanical and surface properties. Thermally aged CHX-loaded PC specimens showed decreased microhardness and flexural strength but not under adequate levels for function. The color change was observed in all CHX-loaded specimens that underwent chemical aging. The long-term use of CHX bioactive systems based on reline resins generally does not impair removable dentures’ proper mechanical and aesthetic functions. | eng |
| dc.identifier.citation | Neves CB, Costa J, Portugal J, Bettencourt AF. Understanding the Mechanical, Surface, and Color Behavior of Oral Bioactive Prosthetic Polymers under Biodegradation Processes. Polymers. 2023; 15(11):2549. https://doi.org/10.3390/polym15112549 | |
| dc.identifier.doi | 10.3390/polym15112549 | |
| dc.identifier.issn | 2073-4360 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/62221 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | MDPI | |
| dc.relation.hasversion | https://doi.org/10.3390/polym15112549 | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | drug delivery system | |
| dc.subject | acrylic resins | |
| dc.subject | color stability | |
| dc.subject | denture reline | |
| dc.subject | removable denture | |
| dc.subject | antimicrobial | |
| dc.title | Understanding the mechanical, surface, and color behavior of oral bioactive prosthetic polymers under biodegradation processes | eng |
| dc.type | contribution to journal | |
| dspace.entity.type | Publication | |
| oaire.citation.issue | 11 | |
| oaire.citation.startPage | 2549 | |
| oaire.citation.title | Polymers | |
| oaire.citation.volume | 15 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 |