title: Evaluation of sodium hypochlorite as a denture cleanser: a clinical study.
abstract: OBJECTIVE
  To evaluate the effect of sodium hypochlorite (NaOCl) on biofilms, colour stability (ΔE) and surface roughness (Ra) of complete dentures and patient acceptability.
  
  
  BACKGROUND
  Denture cleansers should be able to reduce the accumulation of biofilms without affecting the acrylic resin properties. Patient satisfaction is important to maintaining their daily use.
  
  
  METHODS
  Fifteen participants were instructed to keep their dentures immersed daily in a 0.5% NaOCl solution for 3 min over 90 days. Swabs were taken from dentures and inoculated on CHROMagar and blood agar. The number of colony-forming units (cfu) was counted after a 48-h incubation period. ΔE was assessed using the CIE L*a*b* system. Ra was measured using a profilometer. Patient acceptability was checked based on their degree of satisfaction. Cell counts, ΔE and Ra were analysed using anova, Friedman's and Kruskal-Wallis tests, respectively (α = 0.05).
  
  
  RESULTS
  A significant reduction in the total number of microorganisms (p = 0.001) and Candida spp. was noticed. No significant differences were found for ΔE (p = 0.68) and for Ra (p = 0.47). The level of the patient satisfaction increased throughout the follow-up period.
  
  
  CONCLUSIONS
  The 0.5% NaOCl solution was effective in reducing microorganisms without significant changes in colour or roughness of denture resin. The participants reported satisfaction with the cleaning results.
authors: Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil.
authors: Sheila Rodrigues
authors: SR
authors: de Sousa Porta
authors: Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil.|University CEUMA, Sao Luis, Maranhao, Brazil.
authors: Sílvia Carneiro
authors: SC
authors: de Lucena-Ferreira
authors: Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil.
authors: Wander José
authors: WJ
authors: da Silva
authors: Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Sao Paulo, Brazil.
authors: Altair Antoninha
authors: AA
authors: Del Bel Cury
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000368:Aged; D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D001419:Bacteria / Q000187:drug effects; D018407:Bacterial Physiological Phenomena / Q000187:drug effects; D018441:Biofilms / Q000187:drug effects*; D002175:Candida / Q000187:drug effects / Q000502:physiology; D015169:Colony Count, Microbial; D003820:Denture Cleansers / Q000737:chemistry*; D003824:Denture, Complete / Q000382:microbiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D012463:Saliva / Q000382:microbiology; D012973:Sodium Hypochlorite / Q000737:chemistry*; D013499:Surface Properties / Q000187:drug effects
chemical_list: D000180:Acrylic Resins; D000891:Anti-Infective Agents, Local; D003820:Denture Cleansers; D012973:Sodium Hypochlorite
keywords: acrylic resin; biofilm; complete denture; denture cleanser; patient satisfaction