João G S Souza1, Jaime A Cury2, Antônio P Ricomini Filho2, Magda Feres3, Marcelo de Faveri3, Valentim A R Barão1. 1. Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil. 2. Department of Physiological Science, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil. 3. Department of Periodontology, Dental Research Division, Guarulhos University (UnG), Guarulhos, São Paulo, Brazil.
Abstract
BACKGROUND: Because sucrose may change the composition of biofilms formed on dental surfaces, the aim of this study was to evaluate in situ the effect of this dietary sugar on biofilm formation on titanium surface. METHODS: In this blind, crossover, in situ study, 10 volunteers wore, in 3 phases of 7 days each, a palatal appliance containing titanium specimens. In each phase, the specimens were treated extraorally with 20% sucrose solution at a frequency of 4 or 8 times per day. As control, no treatment was rendered (0×). At the end of each phase, the biofilms were collected for biochemical analysis of biofilm wet weight (biomass), protein concentration, soluble (S-EPS), and insoluble (I-EPS) extracellular polysaccharides and intracellular polysaccharides (IPS), and for microbiologic analysis by checkerboard DNA-DNA hybridization (for levels and proportions of 40 bacterial species). Biochemical data were analyzed by linear regression and microbiological findings by Friedman and Dunn tests (α = .05). RESULTS: A positive significant linear relationship was found among sucrose exposure (0×, 4×, and 8×) and biomass, S-EPS, I-EPS and IPS (p < 0.05). The biofilms treated with sucrose (4× and/or 8×) presented higher mean total levels of the 40 bacterial species evaluated, higher proportions of red complex species and lower proportions of the host-compatible green complex species, in comparison with the control group (p < 0.05). CONCLUSION: The findings of the present study suggest that daily sucrose exposure has a harmful effect on the composition of biofilms formed on titanium surfaces.
RCT Entities:
BACKGROUND: Because sucrose may change the composition of biofilms formed on dental surfaces, the aim of this study was to evaluate in situ the effect of this dietary sugar on biofilm formation on titanium surface. METHODS: In this blind, crossover, in situ study, 10 volunteers wore, in 3 phases of 7 days each, a palatal appliance containing titanium specimens. In each phase, the specimens were treated extraorally with 20% sucrose solution at a frequency of 4 or 8 times per day. As control, no treatment was rendered (0×). At the end of each phase, the biofilms were collected for biochemical analysis of biofilm wet weight (biomass), protein concentration, soluble (S-EPS), and insoluble (I-EPS) extracellular polysaccharides and intracellular polysaccharides (IPS), and for microbiologic analysis by checkerboard DNA-DNA hybridization (for levels and proportions of 40 bacterial species). Biochemical data were analyzed by linear regression and microbiological findings by Friedman and Dunn tests (α = .05). RESULTS: A positive significant linear relationship was found among sucrose exposure (0×, 4×, and 8×) and biomass, S-EPS, I-EPS and IPS (p < 0.05). The biofilms treated with sucrose (4× and/or 8×) presented higher mean total levels of the 40 bacterial species evaluated, higher proportions of red complex species and lower proportions of the host-compatible green complex species, in comparison with the control group (p < 0.05). CONCLUSION: The findings of the present study suggest that daily sucrose exposure has a harmful effect on the composition of biofilms formed on titanium surfaces.
Authors: Noah Z Laird; Walla I Malkawi; Jaidev L Chakka; Timothy M Acri; Satheesh Elangovan; Aliasger K Salem Journal: J Tissue Eng Regen Med Date: 2020-03-04 Impact factor: 3.963
Authors: João G S Souza; Raphael C Costa; Aline A Sampaio; Victória L Abdo; Bruna E Nagay; Nidia Castro; Belén Retamal-Valdes; Jamil A Shibli; Magda Feres; Valentim A R Barão; Martinna Bertolini Journal: iScience Date: 2022-03-01
Authors: João Gabriel Silva Souza; Martinna Bertolini; Angela Thompson; Jillian M Mansfield; André Alex Grassmann; Kendra Maas; Melissa J Caimano; Valentim Adelino Ricardo Barao; M Margaret Vickerman; Anna Dongari-Bagtzoglou Journal: ISME J Date: 2020-02-10 Impact factor: 10.302