Understanding the Mechanical, Surface, and Color Behavior of Oral Bioactive Prosthetic Polymers under Biodegradation Processes
Open Access
- 31 May 2023
- Vol. 15 (11), 2549
- https://doi.org/10.3390/polym15112549
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.Keywords
This publication has 60 references indexed in Scilit:
- Surface properties and color stability of an acrylic resin combined with an antimicrobial polymerRevista de Odontologia da UNESP, 2013
- Synthesis and characterization of cross-linked polymeric nanoparticles and their composites for reinforcement of photocurable dental resinReactive and Functional Polymers, 2013
- Candidacidal effect of fluconazole and chlorhexidine released from acrylic polymerJournal of Antimicrobial Chemotherapy, 2012
- Fungicidal amounts of antifungals are released from impregnated denture lining material for up to 28 daysJournal of Dentistry, 2012
- New form of administering chlorhexidine for treatment of denture-induced stomatitisTherapeutics and Clinical Risk Management, 2011
- Differential diagnosis of denture‐induced stomatitis, Candida, and their variations in patients using complete denture: a clinical and mycological studyMycoses, 2009
- Wettability of denture relining materials under water storage over timeThe Journal of Advanced Prosthodontics, 2009
- Controlled Release of Chlorhexidine Diacetate from a Porous Methacrylate System: Supercritical Fluid Assisted Foaming and ImpregnationJournal of Pharmaceutical Sciences, 2007
- Influence of salivary organic substances on the discoloration of esthetic dental materials—A reviewJournal of Biomedical Materials Research Part B: Applied Biomaterials, 2005
- Influence of polymerization method, curing process, and length of time of storage in water on the residual methyl methacrylate content in dental acrylic resinsJournal of Biomedical Materials Research Part B: Applied Biomaterials, 2005