Abstract:
:This study aimed to evaluate the effects of low-level laser therapy (LLLT) immediately before tetanic contractions in skeletal muscle fatigue development and possible tissue damage. Male Wistar rats were divided into two control groups and nine active LLLT groups receiving one of three different laser doses (1, 3, and 10 J) with three different wavelengths (660, 830, and 905 nm) before six tetanic contractions induced by electrical stimulation. Skeletal muscle fatigue development was defined by the percentage (%) of the initial force of each contraction and time until 50 % decay of initial force, while total work was calculated for all six contractions combined. Blood and muscle samples were taken immediately after the sixth contraction. Several LLLT doses showed some positive effects on peak force and time to decay for one or more contractions, but in terms of total work, only 3 J/660 nm and 1 J/905 nm wavelengths prevented significantly (p < 0.05) the development of skeletal muscle fatigue. All doses with wavelengths of 905 nm but only the dose of 1 J with 660 nm wavelength decreased creatine kinase (CK) activity (p < 0.05). Qualitative assessment of morphology revealed lesser tissue damage in most LLLT-treated groups, with doses of 1-3 J/660 nm and 1, 3, and 10 J/905 nm providing the best results. Optimal doses of LLLT significantly delayed the development skeletal muscle performance and protected skeletal muscle tissue against damage. Our findings also demonstrate that optimal doses are partly wavelength specific and, consequently, must be differentiated to obtain optimal effects on development of skeletal muscle fatigue and tissue preservation. Our findings also lead us to think that the combined use of wavelengths at the same time can represent a therapeutic advantage in clinical settings.
journal_name
Lasers Med Scijournal_title
Lasers in medical scienceauthors
Santos LA,Marcos RL,Tomazoni SS,Vanin AA,Antonialli FC,Grandinetti Vdos S,Albuquerque-Pontes GM,de Paiva PR,Lopes-Martins RÁ,de Carvalho Pde T,Bjordal JM,Leal-Junior ECdoi
10.1007/s10103-014-1560-1subject
Has Abstractpub_date
2014-09-01 00:00:00pages
1617-26issue
5eissn
0268-8921issn
1435-604Xjournal_volume
29pub_type
杂志文章abstract::The purpose of this article was to analyze the photobiomodulator role of low-level laser therapy (LLLT) on the skeletal muscle remodeling following cryoinjury in rats, focusing the types I and III collagen proteins. Laser phototherapy has been employed to stimulate repair in different tissues. However, its role in ske...
journal_title:Lasers in medical science
pub_type: 杂志文章
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abstract::We aimed at examining the effects of a percentage of air/water in spray on the cutting efficiency of Er,Cr:YSGG laser for enamel and dentin. The intensity and frequency of irradiation were 3.0 W and 20 Hz for the enamel surface and 2.0 W and 20 Hz for the dentin surface, respectively. Flattened surfaces of enamel and ...
journal_title:Lasers in medical science
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abstract::For chronic rhinitis that is refractory to medical therapy, surgical intervention such as endoscopic vidian neurectomy (VN) can be used to control the intractable symptoms. Lasers can contribute to minimizing the invasiveness of ENT surgery. The aim of this retrospective study is to compare in patients who underwent d...
journal_title:Lasers in medical science
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journal_title:Lasers in medical science
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abstract::Low-power laser therapy has become popular in clinical applications including promoting wound healing and pain relief. However, effects of this photoradiation on human hepatoma cells are rarely studied. Previously, we found 808 nm gallium aluminum arsenide (GaAlAs) continuous wave laser had an inhibitory effect on the...
journal_title:Lasers in medical science
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abstract::Hyperhidrosis and bromhidrosis were lately reported as novel side effects of laser-assisted removal of axillary hair. The goal of our study was to evaluate the reversibility of these two side effects. An observational, single-center cohort study included over a 30-month screening period 30 patients with newly reported...
journal_title:Lasers in medical science
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journal_title:Lasers in medical science
pub_type: 杂志文章
doi:10.1007/s10103-011-0953-7
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abstract::The aim of the present study was to evaluate the success rate of failed implants re-implanted after surface treatment with CO2 laser. Despite the widespread use of dental implants, there are many incidents of failures. It is believed that lasers can be applied to decontaminate the implant surface without damaging the ...
journal_title:Lasers in medical science
pub_type: 杂志文章
doi:10.1007/s10103-016-1921-z
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journal_title:Lasers in medical science
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journal_title:Lasers in medical science
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Lasers in medical science
pub_type: 杂志文章,评审
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journal_title:Lasers in medical science
pub_type: 杂志文章
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journal_title:Lasers in medical science
pub_type: 杂志文章,随机对照试验
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更新日期:2018-05-01 00:00:00
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journal_title:Lasers in medical science
pub_type: 临床试验,杂志文章
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journal_title:Lasers in medical science
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更新日期:2016-12-01 00:00:00
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journal_title:Lasers in medical science
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更新日期:2020-11-07 00:00:00
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journal_title:Lasers in medical science
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journal_title:Lasers in medical science
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journal_title:Lasers in medical science
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journal_title:Lasers in medical science
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pub_type: 杂志文章,随机对照试验
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journal_title:Lasers in medical science
pub_type: 杂志文章
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journal_title:Lasers in medical science
pub_type: 杂志文章
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journal_title:Lasers in medical science
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journal_title:Lasers in medical science
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journal_title:Lasers in medical science
pub_type: 杂志文章
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更新日期:2009-01-01 00:00:00
abstract::Photodynamic therapy (PDT) with photosensitizer is one of the promising modalities for cancer treatment. For clinical use of PDT, screening process should be preceded to enhance sensitivity to PDT. Thus, we investigated a molecular biomarker to determine the sensitivity to pheophorbide a (Pa)-PDT in immortalized human...
journal_title:Lasers in medical science
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abstract::The bactericidal activity of a pulsed fibre-optic Nd-YAP laser on various strains of oral bacteria: Prevotella nigrescens, Streptococcus sanguis, Actinomyces viscosus (i), Fusobacterium nucleatum, Actinobacillus actinomycetemcomitans and Peptostreptococcus micros (i) was evaluated. A 200-μm optical fibre was placed in...
journal_title:Lasers in medical science
pub_type: 杂志文章
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abstract::The aim of this in vitro study was to evaluate the effect of laser treatment on shear bond strength of a self-adhesive flowable resin composite to human dentin. Eighty extracted sound human molar teeth were used for the study. The teeth were sectioned mesiodistally and embedded in acrylic blocks. The dentin surfaces w...
journal_title:Lasers in medical science
pub_type: 杂志文章
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abstract::Crohn's disease is a chronic relapsing and remitting inflammatory condition which affects any part of the gastrointestinal tract. In the oro-facial region, patients can present peri-oral swellings which results in severe facial disfigurement. To date, assessing the degree of facial changes and evaluation of treatment ...
journal_title:Lasers in medical science
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更新日期:2014-05-01 00:00:00