• Journal of Acupuncture Research
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• v.36 no.4
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• pp.251-255
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• 2019

Background: Low-level laser therapy (LLLT) including laser acupuncture (LA) has been widely used to treat chronic low back pain (CLBP), but there is no critically appraised evidence of the potential benefits. The purpose of this protocol for a systematic review was to enable the evaluation of the effectiveness of LLLT including LA for non-specific CLBP to identify the potential benefits. Methods: The electronic databases MEDLINE (PubMed), Embase (Ovid), the Cochrane Central Register of Controlled Trials (CENTRAL), Korean medical databases (KoreaMed, KMBASE, KISS, NDSL, KISTI, OASIS), the Chinese database (CNKI), and Japanese databases (CiNII, J-STAGE) are recommended. Results: Randomized controlled trials in LLLT including LA should be included in the searches. All data synthesis and subgroup analyses should be conducted using a Review Manager software. The Cochrane risk of bias tool can be used to evaluate methodological quality of the studies. A risk ratio or mean difference with a 95% confidence interval will show the effects of LLLT including LA. Conclusion: The primary outcome would be pain intensity and functional status/disability due to low back pain. The secondary outcome would be a global measurement of recovery or improvement, quality of life and adverse event.

• The Journal of the Korean dental association
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• v.49 no.11
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• pp.679-687
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• 2011

Low-level laser therapy (LLLT) is the application of light to pathology to promote tissue regeneration, reduce inflammation, and relieve pain. LLLT has a photochemical effect whereby the light is absorbed and exerts a chemical change. The clinical applications of LLLT include improvement in wound and bone healing processes, control of pain and tooth hypersensitivity, modulation of periodontal inflammation, the prevention and treatment of cancer therapy-induced oral mucositis, management of burning mouth syndrome, and improvement in temporomandibular disorder symptoms. Further research is needed to better elucidate the cellular mechanisms of LLLT and provide a solid scientific basis for the clinical application of LLLT in dentistry.

• The Journal of Korean Physical Therapy
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• v.36 no.1
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• pp.14-20
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• 2024

Purpose: This study was performed to identify and investigate the therapeutic effects of low-level laser (LLL) combined with a light-emitting diode (LED) on post-operative wound healing and functional recovery after hand orthopedic surgery. Methods: The study subjects were twenty patients who had passed the acute inflammatory phase after hand orthopedic surgery and were assigned equally to an experimental or a control group. Phototherapy was administered three times weekly for two weeks. Changes in wound length, edema, pain, and hand function were measured. Results: Significant differences in wound length, edema, pain, and hand function were observed between the experimental and control groups (p<0.05). However, no significant intergroup difference was observed (p>0.05). Nonetheless, a comparison of results showed changes in the experiment group over the two-week study period were significantly greater than in the control group (p<0.05). Conclusion: These findings show that combined LLL plus LED phototherapy positively influences post-operative hand rehabilitation.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.27 no.2
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• pp.33-50
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• 2014

Objective : The purpose of this study is to analyze research trends on laser output used for treatment of hair loss. Methods : We searched papers using Pubmed, NDSL, KISS, and RISS. First search used the keyword "Laser, Alopecia" in Pubmed. Inclusion criteria were last 15 years, English, related to output. Finally we searched papers using the keyword "Laser and Alopecia" in NDSL, KISS, and RISS. Inclusion criteria were the same as first research except for English. Results : A total of 43 studies were found, 28 studies were excluded and 15 studies were selected and analyzed. And of the 15 studies, 7 studies were foreign papers and 8 studies were domestic papers on clinical application of laser status. Mainly Used type of laser was a diode laser. As a result, we found that treatment group had more improvement than control group. The range of the laser-output was 1mW-150W in Alopecia laser therapy. Conclusions : Low-level (LLLT) as well as High-level laser therapy (HLLT) can be effectively used as an alternative to the treatment of alopecia. Thus, further attention and studies are needed on this topic in order to reduce the side effects and demonstrate the effectiveness clearly.

• The korean journal of orthodontics
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• v.51 no.5
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• pp.313-320
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• 2021

Objective: The purpose of this study was to evaluate the effects of chewing gum and low-level laser therapy in alleviating orthodontic pain induced by the initial archwire. Methods: Patients with 3-6 mm maxillary crowding who planned to receive non-extraction orthodontic treatment were recruited for the study. Sixty-three participants (33 females and 30 males) were randomly allocated into three groups: laser, chewing gum, and control. In the laser group, a gallium aluminum arsenide (GaAlAs) diode laser with a wavelength of 820 nm was used to apply a single dose immediately after orthodontic treatment began. In the chewing gum group, sugar-free gum was chewed three times for 20 minutes-immediately after starting treatment, and at the twenty-fourth and forty-eighth hours of treatment. Pain perception was measured using a visual analog scale at the second, sixth, and twenty-fourth hours, and on the second, third, and seventh days. Results: There were no statistically significant differences between the groups at any measured time point (p > 0.05). The highest pain scores were detected at the twenty-fourth hour of treatment in all groups. Conclusions: Within the limitations of the study, we could not detect whether low-level laser therapy and chewing gum had any clinically significant effect on orthodontic pain. Different results may be obtained with a higher number of participants or using lasers with different wavelengths and specifications. Although the study had a sufficient number of participants according to statistical analysis, higher number of participants could have provided more definitive outcomes.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.24 no.2
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• pp.102-106
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• 2013

The cure rates for early stage laryngeal cancer are similar between laser cordectomy and radiation therapy. As well as the survival outcome, one of the main measures of success in treatment of early laryngeal cancer is voice outcome. Many studies have demonstrated that laser cordectomy and radiation therapy to be equivalent with regard to vocal outcome, whereas others favor radiation. Although such as somewhat disadvantages of voice outcome, laser cordectomy still remains a valid option. Since the patients who treated with laser may benefit from additional phonosurgery to improve postoperative vocal outcome. In this article, we reviewed the techniques of phonosurgery which can be used for laryngeal reconstruction after laser cordectomy. The indications for using each technique are discussed, with particular attention paid to functional outcomes following these reconstructive efforts.

• Journal of the Korean Society of Visualization
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• v.8 no.4
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• pp.54-59
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• 2010

A laser moxibustion therapy device having effect similar to that of traditional moxibustion is being developed using 1064 nm infrared laser. The therapy device allows direct interaction of laser light with the tissue rendering temperature distribution both on the skin surface and deep under the skin. We made a device that could measure temperature of deep under the surface of agar gel tissue phantom using thermocouples. A thermal imaging camera was used to verify results from the temperature measurement device. We compared the characteristics of heat transfer inside the tissue phantom during moxibustion and laser irradiation. The temperature distribution measured by thermocouples was found to be similar to that of distribution given by thermal imaging camera.

• The Journal of Korean Physical Therapy
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• v.9 no.1
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• pp.89-96
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• 1997

The purpose of this study was to determine the effect of Ga-Al-As (Gallium-Aluminum-Arsenid) laser radiation on the tail-flick latency in rat. Thirty Sprague-Dawley male and female rats Were divided into five groups : that is control, laser 15sec radiation, laser 30sec radiation, laser 60sec radiation, and Tramadol Hcl injection groups. The continuous Ga-Al-As laser with, wave length 780-830nm and diameter of probe in the 3mm, averse output of 100mw radiation was applied to the meridian point(Gv 1 : Governing vessel) of the rats. Tail-flick latency were measured with hot plate at $55^{\circ}C$ : before treatment and immediately, 30 minutes, 1 hour, 2 hours, 24 hours, 24 hours and 48 hours after treatment. The result were as follows ; 1. The tail-flick latency according to time varition, control group was not significance. 2. The tail-flick latency according to time varition, laser 15 sec irradiate rats in post-treared was significance(P<0.05). 3. The tail-flick latency according to time varition, laser 30 sec irradiate rats group was not significance. 4. The tail-flick latency according to time varition, laser 60 sec irradiate rats in post 30 minute was significance(P<0.05). 5. The tail-flick latency according to time varition, Tramadol Hcl injection rats in post-treated (P<0.05), post 30 minute(P<0.05), post 60 minute (P<0.01) and 2 hour(P<0.05) was significance. This study suggest that Ga-Al-As (Gallium-Aluminum-Arsenid) laser applied to meridian point of the rat with 15 sec, 30 sec, and 60 set radiation could induc no analgesic effect, but Tramadol Hcl injection rat is good analgesic effect.

• The Journal of Korean Physical Therapy
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• v.12 no.3
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• pp.469-474
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• 2000

This studies were to investigate the effects of low power intensity Helium-Neon Infra-Red(He-Ne IR) laser on the changes of the serum immunoglobulin(1g) components in burn rats, The fourty eight Spraque-Dawley adult male rats were assigned to the 8 groups: the experimental groups(4), the burn control groups(2) and the control groups(2) There was made three degree burn by the 250mW IR on the back of each rats, from 3 days after being burned, the experimental laser groups were irradiated low power He-Ne IR laser for 3 minutes and 4.5 minutes every day during the 7days and 21 days. The results were as follows: The concentrations of immunoglobulin G(Ig G) in serum of burn rats on the treated with during the 3minutes laser for 7 days were higher than those of burn and 4.5 minutes laser groups. There were significantly decreased the change of the level of immunoglobulin M(Ig M) in serum of burn rats on the treated with 3 minutes laser for 7 days to the control group, but were significantly increased on the 3minutes and 4.5 minutes laser groups for 21 days to the those of burn and control groups, and the levels of the Ig M on the 3minutes laser group for 21 days were higher than those of 7 days. The concentrations of immunoglobulin E(Ig E) in serun of the burn rats on the experimental and burn groups were significantly lower than those in control group. As above results, The changes of the level of immonoglobulin components in serum have meaningful role in the healing process on the treated with the low pewer intensity of HE-Ne IR laser.

• Journal of Periodontal and Implant Science
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• v.26 no.2
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• pp.522-530
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• 1996

Most dentists are very interested in laser therapy on the intraoral soft tissue lesions because they want to accomplish the analgesic and aseptic surgery with little or no bleeding. In order to determine the difference of pain threshold according to different gingival tissues with or without inflammation, 25 patients with inflammatory periodontal disease and 10 volunteers with good general and oral health were selected as the inflamed group and the normal group, respectively. Interdental papilla, marginal gingiva, attached gingiva, and alveolar mucosa were irradiated by the contact delivery($300{\mu]m$ fiber optic, for 5 seconds) of a pulsed Nd:YAG laser(EN.EL.EN06O, Italy). And the laser power was gradually increased from 0.5W by the increment of 0.1W. The highest laser power was recorded as the first painful power when the painful gesture was recognized at first. The difference of the first painful power of laser according to different gingival tissues with or without inflammation was statistically analyzed by paired t-test in MICROSTAT program. Following results were obtained: 1. In the comparison related with the inflammation, the first painful power was significantly lower in the inflamed group than in the normal group, regardless of interdental papilla and marginal gingiva(p<0.05). 2. In the comparison related with the tissue structure, the first painful. power was significantly lower in alveolar mucosa than in attached gingiva(p<0.05). The results suggest that, for the painless therapy by a pulsed-Nd:YAG laser irradiation, the laser surgery over 2.0W of power should be necessarily accomplished under the local anethesia, and the local anesthesia should be considered according to the degree of inflammation, the tissue structure, and the purpose of laser therapy.