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341393 occurrences (No.55 in the rank) during 5 years in the PubMed. [no cache] 500 found
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341393 occurrences (No.55 in the rank) during 5 years in the PubMed. [no cache] 500 found
| 97) The proportions of black-pigmented species Porphyromonas gingivalis and Prevotella intermedia were significantly reduced on the exposed side from their original proportions by 25 and 56 %, respectively, while no change was observed to the unexposed side. |
| PMID:24346334 DOI:10.1007/s10103-013-1497-9 |
| 2015 Lasers in medical science |
| * Phototargeting human periodontal pathogens in vivo. |
| - The effects of blue light at 455 nm were investigated on the bacterial composition of human dental plaque in vivo. Eleven subjects who refrained from brushing for 3 days before and during phototherapy participated in the study. Light with a power density of 70 mW/cm(2) was applied to the buccal surfaces of premolar and molar teeth on one side of the mouth twice daily for 2 min over a period of 4 days. Dental plaque was harvested at baseline and again at the end of 4 days from eight posterior teeth on both the exposed side and unexposed sides of the mouth. Microbiological changes were monitored by checkerboard DNA probe analysis of 40 periodontal bacteria. The proportions of black-pigmented species Porphyromonas gingivalis and Prevotella intermedia were significantly reduced on the exposed side from their original proportions by 25 and 56 %, respectively, while no change was observed to the unexposed side. Five other species showed the greatest proportional reduction of the light-exposed side relative to the unexposed side. These species were Streptococcus intermedius, Fusobacterium nucleatum ss. vincentii, Fusobacterium nucleatum ss. polymorphum, Fusobacterium periodonticum, and Capnocytophaga sputigena. At the same time, the percentage of gingival areas scored as being red decreased on the side exposed to light from 48 to 42 %, whereas the percentage scored as red increased on the unexposed side from 53 to 56 %. No adverse effects were found or reported in this study. The present study proposes a new method to modify the ecosystem in dental plaque by phototherapy and introduces a new avenue of prophylactic treatment for periodontal diseases. |
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--- WordNet output for while ---