Bactericidal Effect of Yellow He-Ne Laser Irradiation on Oral Bacteria.

泰之, 平野; 純一, 西方; 公二, 伊藤; 憲二, 田中; 公一, 伊藤; 正大, 村井

doi:10.2329/perio.35.494

Cited by 3 publications

(8 citation statements)

References 6 publications

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“…The clinical e#ects of low-power lasers include a bactericidal e#ect [14], amelioration of dentine hypersensitivity [24], and a wound-healing e#ect [25]. Wilson [14] and Hirano et al [11] suggested that the energy of red He-Ne laser was transferred from the triplet state of a light-absorbing compound used as a photosensitiser to molecules other than oxygen, resulting in formation of highly reactive free radicals. The experimental procedure used in our study was a modification of the method reported by Bartlett [19], who investigated the antibiotic e#ect on intraabdominal abscesses in an animal model.…”

Section: Discussionmentioning

confidence: 99%

“…We believe that the heat of high-power lasers has an adverse e#ect on hard dental tissues, and oral soft tissue which argues against their use solely for antibacterial purpose. Use of low-powered lasers, like those required for photodynamic therapy [11], would be a more attractive proposition from the view point of safety.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies in vitro [11][12][13][14] have revealed bactericidal e#ects of low-power lasers, e.g. red and yellow He-Ne and argon lasers.…”

Section: Introductionmentioning

confidence: 99%

“…Okamoto et al [13] and Wilson [14] reported an antibacterial e#ect of red He-Ne laser irradiation with crystal violet (CV) solution, and the antibacterial e#ect of yellow He-Ne laser irradiation under existing CV solution has also been reported [11]. Porphyromonas gingivalis often exists in periodontal pockets and periodontal abscesses [16][17][18], and is observed site-specifically in patients with periodontitis.…”

Section: Introductionmentioning

confidence: 99%

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Antibacterial Effect of Yellow He-Ne Laser Irradiation with Crystal Violet Solution on Porphyromonas gingivalis: An Evaluation Using Experimental Rat Model Involving Subcutaneous Abscess

et al. 2000

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A study was conducted to evaluate the antibacterial e#ect of yellow He-Ne laser irradiation with crystal violet solution (CV) on Porphyromonas gingivalis (P.g.). Paper points were soaked with a P.g. suspension (10 9 ml) with 0.8 mg/l CV added, laser-irradiated for 60 s (laser group), and implanted subcutaneously on the back of rats. Three additional groups were studied: CV group: the paper point was soaked with the P.g. suspension plus 0.8 mg/l CV, but laser irradiation was not performed; P.g. group: the paper point was soaked with the P.g. suspension only and laser irradiation was not performed; control group: the paper point was soaked with sterilised isotonic sodium chloride solution and laser irradiation was not performed. Seven days after implantation, block sections of all implanted sites were examined histologically. The abscess area in the laser group was smaller than in the P.g. group or CV group, but larger than in the control group. The number of inflammatory cells was greatest in the P.g. and CV groups, with fewer in the laser group and still fewer in the control group. The results indicate that a yellow He-Ne laser with 0.8 mg/l CV solution exerts an antibacterial e#ect in vivo.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Many studies in vitro [11][12][13][14] have revealed bactericidal e#ects of low-power lasers, e.g. red and yellow He-Ne and argon lasers.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Antibacterial Effect of Yellow He-Ne Laser Irradiation with Crystal Violet Solution on Porphyromonas gingivalis: An Evaluation Using Experimental Rat Model Involving Subcutaneous Abscess

et al. 2000

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“…Several studies showed that, low-power laser irradiation in combination with a photosensitiser had a bactericidal e#ect [15][16][17]. Our previous studies demonstrated that Yellow He-Ne laser irradiation in the presence of crystal violet (CV: actioned as a photosensitiser) had bactericidal e#ects on oral bacteria in vitro [18][19][20][21] and in rats [22]. However, the e#ects of this laser system on oral bacteria in the human mouth are not known.…”

Section: Introductionmentioning

confidence: 99%

Inhibitory Effect of Yellow He-Ne Laser Irradiation Mediated by Crystal Violet Solution on Early Plaque Formation in Human Mouth

et al. 2000

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The purpose of this study was to evaluate the e#ect of yellow He-Ne laser irradiation in the presence of crystal violet (CV) solution on dental plaque formation in the human mouth. Four enamel specimens were fixed on a retainer, one of which was placed on both maxillary buccal sites of four subjects. The retainers were assigned randomly to 3-or 7-day experimental periods and the right or left buccal sites for the evaluation of plaque formation on the specimens. Then, the specimens were assigned randomly to four treatments as follows: A, laser irradiation; B, CV application; C, CV application and laser irradiation and D, no treatment (control). At three and seven days after the treatments, the inhibitory e#ects of plaque formation on the specimens were evaluated by measuring the thickness of the plaque on each section. Analysis of the plaque formation scores revealed that treatment C had a significantly greater inhibitory e#ect on plaque formation than treatment A, B and D after 3 days, however there were no significant di#erences among the plaque formation scores of the four treatment groups after 7 days. Analysis of the plaque thickness revealed that at both 3 and 7 days after treatment, the plaque layers after treatment C were significantly thinner than those after treatments A, B and D. These results indicated that yellow He-Ne laser irradiation in the presence of CV had an inhibitory e#ect of plaque formation in human mouth.

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Spectroscopic and antimicrobial studies of polystyrene films under air plasma and He-Ne laser treatment

Pawde

Parab

2008

Pramana - J Phys

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Polystyrene (PS) films are used in packaging and biomedical applications because of their transparency and good environmental properties. The present investigation is centered on the antifungal and antibacterial activities involved in the film surface. Subsequently, microbial formations were immobilized on the modified PS films. Living microorganisms such as bacteria and yeast were used. Untreated PS films show very fast rate of growth of bacteria within few hours. The study involves developments of polymer surfaces with bacterial growth and further studies after giving antibacterial treatment such as plasma treatment. Major emphasis has been given to study the effect of various parameters which can affect the performance of the improved material. Films were prepared by two methods: plasma treatment under vacuum and under ongoing He-Ne laser source. The parameters such as (1) surface area by contact angle measurements, (2) quality of material before and after treatment by SEM and FTIR spectra and (3) material characterization by UV-vis spectra were studied. It was observed that plasma treatment of the PS material for different processing time improved the surface properties of PS films.

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Bactericidal Effect of Yellow He-Ne Laser Irradiation on Oral Bacteria.

Cited by 3 publications

References 6 publications

Antibacterial Effect of Yellow He-Ne Laser Irradiation with Crystal Violet Solution on Porphyromonas gingivalis: An Evaluation Using Experimental Rat Model Involving Subcutaneous Abscess

Antibacterial Effect of Yellow He-Ne Laser Irradiation with Crystal Violet Solution on Porphyromonas gingivalis: An Evaluation Using Experimental Rat Model Involving Subcutaneous Abscess

Inhibitory Effect of Yellow He-Ne Laser Irradiation Mediated by Crystal Violet Solution on Early Plaque Formation in Human Mouth

Spectroscopic and antimicrobial studies of polystyrene films under air plasma and He-Ne laser treatment

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