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Denture stomatitis (DS) is an inflammatory disease resulting from a polymicrobial biofilm perturbation at the denture surface-palatal mucosa interface. Recommendations made by dental health care professionals often lack clarity for appropriate denture cleaning. This study investigated the efficacy of brushing with off-the-shelf denture cleanser (DC) tablets (Poligrip) vs. two toothpastes (Colgate and Crest) in alleviating the viable microorganisms (bacteria and fungi) in an in vitro denture biofilm model. Biofilms were grown on poly(methyl)methacrylate (PMMA) discs, then treated daily for 7 days with mechanical disruption (brushing), plus Poligrip DC, Colgate or Crest toothpastes. Weekly treatment with Poligrip DC on day 7 only was compared to daily modalities. All treatment parameters were processed to determine viable colony forming units for bacteria and fungi using the Miles and Misra technique, and imaged by confocal laser scanning microscopy (CLSM). Brushing with daily DC therapy was the most effective treatment in reducing the viable biofilm over 7 days of treatment. Brushing only was ineffective in controlling the viable bioburden, which was confirmed by CLSM imaging. This data indicates that regular cleansing of PMMA with DC was best for polymicrobial biofilms.
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http://dx.doi.org/10.3390/antibiotics11010113 | DOI Listing |
Dent Med Probl
September 2025
Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.
Background: Effective cleaning protocols are crucial for controlling biofilm formation on oral prostheses and preserving the oral health of patients relying on removable partial dentures (RPDs).
Objectives: The present study aimed to investigate the antibiofilm efficacy of 4 cleansing protocols on a cobalt-chromium (Co-Cr) alloy surface, which is commonly used as the base-metal framework material in dental prosthodontics.
Material And Methods: Cobalt-chromium specimens were contaminated with isolated strains of Candida albicans, Candida glabrata, Staphylococcus aureus, and Streptococcus mutans to form monospecies biofilms.
J Prosthet Dent
September 2025
Full Professor, Department of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil. Electronic address:
Statement Of Problem: Despite the importance of denture hygiene, little is known about how different hygiene protocols perform against multispecies biofilms, including Candida albicans, Staphylococcus aureus, and Streptococcus mutans, on denture surfaces made from conventional versus 3-dimensionally (3D) printed acrylic resins.
Purpose: The purpose of this in vitro study was to evaluate the effect of hygiene protocols on a multispecies biofilm (C albicans, S aureus, and S mutans) formed on resin used for denture bases and teeth.
Material And Methods: Circular specimens (Ø6×2 mm) were made from 3D printed denture resin (n=77) and heat-polymerized resin (n=77).
Colloids Surf B Biointerfaces
August 2025
Chemistry Department, University of Massachusetts Lowell, One University Ave, Lowell, MA 01854-2874, USA. Electronic address:
Conventional polymethylmethacrylate (PMMA)-based denture materials are susceptible to colonization and biofilm-formation by Candida species, leading to Candida-associated denture stomatitis (CADS), a recurring fungal infection that affects a large patient population. In this report, we developed a two-step, plasma-initiated surface functionalization approach to covalently bond poly (methacrylic acid) (PMAA) onto denture resins. Various reaction conditions were investigated and the effects of PMAA grafting yields on the physical properties of the resulting denture materials were determined.
View Article and Find Full Text PDFInt J Mol Sci
August 2025
Faculty of Medicine and Health Sciences, Dental School, University of Barcelona, Investigator of the IDIBELL Institute, 08908 Barcelona, Spain.
Antimicrobial resistance is a critical global health issue exacerbated by biofilm-associated infections that often resist conventional therapies. Photodithazine-mediated antimicrobial photodynamic therapy (PDZ-aPDT) has emerged as a promising alternative, demonstrating a broad-spectrum antimicrobial efficacy against multidrug-resistant bacteria and fungi, including those in biofilms. This systematic review evaluates the efficacy, safety, and clinical applications of PDZ-aPDT by synthesizing evidence from preclinical and clinical studies.
View Article and Find Full Text PDFClin Oral Investig
August 2025
Department of Microbiology, School of Dental Medicine, University of Belgrade, Dr. Subotića 1, Belgrade, 11000, Serbia.
Objectives: To evaluate the effects of hydrothermal ageing on biofilm adhesion and surface properties of denture base resins fabricated via different techniques.
Materials And Methods: Denture base resin samples were produced using the following manufacturing techniques: conventional cold polymerization (CP), heat polymerization (HP), CAD-CAM milling (CADm) and CAD-CAM printing (3D). The samples were tested before and after hydrothermal ageing (5000 cycles, 5 °C/55°C).