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- Title
Topical Effect of a Medically Prescribed Pediatric Antibiotic on Dental Biofilm: A Cross-Over, In Situ Study.
- Authors
da Silva Pierro, Viviane Santos; de Carvalho Ferreira, Dennis; de Jesus, Hugo Emiliano; Soares Rosado, Alexandre; Raggio Luiz, Ronir; Dos Santos, Kátia Regina Netto; Cople Maia, Lucianne
- Abstract
Objective: This study aimed to investigate the possible topical effect of a broad-spectrum antibiotic on dental biofilm formed in situ in the absence or presence of sucrose. Methods: A crossover study was conducted in three phases of 14 days each, during which 11 volunteers wore palatal devices containing 6 enamel blocks covered with meshes to allow biofilm formation. Dental blocks were extraorally submitted to a 20% sucrose solution at three different frequencies of exposure (0, 3 and 8 times/day), and to a suspension of amoxicillin/clavulanate potassium (A/CP) or a placebo (P) suspension at an 8-hour time interval application regimen. On the 14th day of each phase, biofilms were collected for microbiological (conventional culture) and molecular (Denaturing Gradient Gel Electrophoresis -- DGGE) analyses. Results: In the absence of sucrose exposure (SE) and at the 3-time daily frequency, dental biofilms treated with A/CP showed lower total biofilm weight and lower counts of total microbiota than the ones treated with P (p.0.05). A/CP presented higher counts of Candida spp. when compared with P in the presence of SE, especially at the 8-time daily frequency (p,0.05). Considering the DGGE analysis, the mean number of bands was higher for P (p.0.05), regardless of SE. However, DGGE profiles demonstrated large interindividual variability. Conclusion: Both conventional culture and DGGE have demonstrated some differences on total microbiota of dental biofilms when exposed to the A/CP or P suspensions, mainly in the absence of sucrose, which suggests a possible topical effect of the sugar-free A/CP suspension on dental biofilm.
- Subjects
ANTIBIOTICS; SUCROSE; BIOFILMS; AMOXICILLIN; PLACEBOS; MICROBIOLOGY
- Publication
PLoS ONE, 2013, Vol 8, Issue 1, p1
- ISSN
1932-6203
- Publication type
Article
- DOI
10.1371/journal.pone.0055558