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Lasers in Medical Science

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https://www.readbyqxmd.com/read/28803363/evaluation-of-nonablative-fractional-laser-treatment-in-scar-reduction
#1
Hilal Gokalp
Fractional lasers have been used for the improvement of scar tissue in the recent years but there has not been extensive research on their impact. The purpose of this study was to evaluate the efficacy of nonablative fractional laser (NAFL) on acne, burn, and surgery/traumatic scar. The scars were also categorized as atrophic, hypertrophic, and keloid, and treatment efficacy was investigated accordingly. This is a retrospective, single-center study. Scar tissues were treated using a nonablative fractional 1550-nm Erbium glass laser in high-energy parameters at 4-week interval for 4-8 sessions...
August 12, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28801870/letter-regarding-effect-of-laser-on-pain-relief-and-wound-healing-of-recurrent-aphthous-stomatitis-a-systematic-review
#2
LETTER
Nasrin Zand, Afshan Shirkavand
No abstract text is available yet for this article.
August 12, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28801854/how-do-red-and-infrared-low-level-lasers-affect-folliculogenesis-cycle-in-rat-s-ovary-tissue-in-comparison-with-clomiphene-under-in-vivo-condition
#3
Paria Naseri, Alireza Alihemmati, Seyed Hossein Rasta
Folliculogenesis is a cycle that produces the majority of oocyte. Any disruption to this cycle leads to ovulation diseases, like polycystic ovarian syndrome (PCOS). Treatments include drugs and surgery; lasers have also been used complementarily. Meanwhile, still there is no definite treatment for PCOS. This study investigated the photo-bio stimulation effect of near-infrared and red low-level laser on producing follicles and compared the result with result of using common drug, clomiphene. Therefore, the aim of this study was to propose the use of lasers autonomously treatment...
August 11, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28801810/effects-of-pbm-in-different-energy-densities-and-irradiance-on-maintaining-cell-viability-and-proliferation-of-pulp-fibroblasts-from-human-primary-teeth
#4
Nádia Carolina Teixeira Marques, Natalino Lourenço Neto, Mariel Tavares Oliveira Prado, Luciana Lourenço Ribeiro Vitor, Rodrigo Cardoso Oliveira, Vivien Thiemy Sakai, Carlos Ferreira Santos, Maria Aparecida Andrade Moreira Machado, Thais Marchini Oliveira
This study aimed to compare the effects of photobiomodulation (PBM) in different energy densities and irradiances on maintaining cell viability, and proliferation of pulp fibroblasts from human primary teeth (HPF) were cultured in DMEM and used between the fourth and eighth passages. Then, HPF were irradiated with the following different energy densities: 1.25 J/cm(2) (a), 2.50 J/cm(2) (b), 3.75 J/cm(2) (c), 5.00 J/cm(2) (d), and 6.25 J/cm(2) (e); but varying either the time of irradiation (groups 1a-1e) or the output power (groups 2a-2e)...
August 11, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28795275/effects-of-photobiomodulation-therapy-and-topical-non-steroidal-anti-inflammatory-drug-on-skeletal-muscle-injury-induced-by-contusion-in-rats-part-2-biochemical-aspects
#5
Shaiane Silva Tomazoni, Lúcio Frigo, Tereza Cristina Dos Reis Ferreira, Heliodora Leão Casalechi, Simone Teixeira, Patrícia de Almeida, Marcelo Nicolas Muscara, Rodrigo Labat Marcos, Andrey Jorge Serra, Paulo de Tarso Camillo de Carvalho, Ernesto Cesar Pinto Leal-Junior
Muscle injuries trigger an inflammatory process, releasing important biochemical markers for tissue regeneration. The use of non-steroidal anti-inflammatory drugs (NSAIDs) is the treatment of choice to promote pain relief due to muscle injury. NSAIDs exhibit several adverse effects and their efficacy is questionable. Photobiomodulation therapy (PBMT) has been demonstrated to effectively modulate inflammation induced from musculoskeletal disorders and may be used as an alternative to NSAIDs. Here, we assessed and compared the effects of different doses of PBMT and topical NSAIDs on biochemical parameters during an acute inflammatory process triggered by a controlled model of contusion-induced musculoskeletal injury in rats...
August 9, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28782092/hard-tissue-debris-removal-from-the-mesial-root-canal-system-of-mandibular-molars-with-ultrasonically-and-laser-activated-irrigation-a-micro-computed-tomography-study
#6
J Verstraeten, W Jacquet, R J G De Moor, M A Meire
This study is to investigate the efficacy of different irrigant activation techniques on removal of accumulated hard tissue debris (AHTD) in mesial roots of human mandibular molars. Extracted human mandibular molars with an isthmus between the mesial root canals were selected based on micro-CT (μCT) scans. The mesial canals were instrumented to an apical diameter ISO30 using ProTaper rotary files. Teeth were randomly assigned to three irrigant activation groups (n = 10): ultrasonically activated irrigation (UAI) using a size 20 Irrisafe for 3 × 20 s, laser-activated irrigation (LAI) with an Er:YAG laser (2940 nm) and plain 300 μm fiber tip inside the canal (20 mJ, 20 Hz, 3 × 20 s), and laser-activated irrigation with identical parameters with a 400 μm photon-induced photoacoustic streaming (PIPS) tip held at the canal entrance...
August 7, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28780623/effect-of-a-photosensitization-reaction-performed-during-the-first-3%C3%A2-min-after-exposure-of-rat-myocardial-cells-to-talaporfin-sodium-in-vitro
#7
Marika Doi, Emiyu Ogawa, Tsunenori Arai
To better understand the mechanism of photodynamic cardiac ablation, we studied the effects of a photosensitization reaction (PR) performed during the first 3 min after rat myocardial cells were exposed to talaporfin sodium. A 3-mm-square microelectrode array with 64 electrodes was used to continuously measure the action potentials of the myocardial cells. A 30 μg/mL talaporfin sodium solution, a chlorine photosensitizer, was used, along with a 663-nm red diode laser (86 mW/cm(2) for up to 600 s). The first trough of the measured action potential waveform corresponding to Na(+) dynamics decreased exponentially with increasing PR duration...
August 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28776112/laser-treatments-of-active-acne
#8
REVIEW
Lauren E Wiznia, Mary L Stevenson, Arielle R Nagler
The utility of laser therapy is increasingly being recognized in the treatment of active acne vulgaris. We aimed to perform a narrative review of the medical literature on the use of laser therapy for the treatment of active acne vulgaris. We performed a PubMed literature search on September 1, 2016 using the search terms "active acne," "acne," "laser therapy," and "laser surgery." Case reports, case series, cohort, and controlled trials were included. Studies of lasers in the treatment of acne, including erbium glass, Nd:YAG, pulse dye laser (PDL), potassium titanyl phosphate (KTP) laser, and laser-based photodynamic therapy, have been published...
August 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28776111/methylene-blue-mediated-photobiomodulation-on-human-osteoblast-cells
#9
Gamze Bölükbaşı Ateş, Ayşe Ak, Bora Garipcan, Murat Gülsoy
Photobiomodulation (PBM) and photodynamic therapy (PDT) are two major methods, which use light in medicine and dentistry. PBM uses low-level laser light to induce cell proliferation and activity. In contrast, PDT use laser light combined with a photosensitizer (PS) to cause cell death. Due to similar, not fully understood mechanisms and biphasic response of light, unexpected and complex outcomes may be observed. In the present study, the effect of 635 nm laser light, with power density 50 mW/cm(2), at three different energy densities (0...
August 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28770401/in-vitro-studies-to-evaluate-the-effect-of-varying-culture-conditions-and-ipl-fluencies-on-tenocyte-activities
#10
Jihad A M Alzyoud, Ilyas M Khan, Sarah G Rees
Tendons are dense, fibrous connective tissues which carry out the essential physiological role of transmitting mechanical forces from skeletal muscle to bone. From a clinical perspective, tendinopathy is very common, both within the sporting arena and amongst the sedentary population. Studies have shown that light therapy may stimulate tendon healing, and more recently, intense pulsed light (IPL) has attracted attention as a potential treatment modality for tendinopathy; however, its mechanism of action and effect on the tendon cells (tenocytes) is poorly understood...
August 3, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28770400/microablative-fractional-co2-laser-for-the-genitourinary-syndrome-of-menopause-power-of-30-or-40%C3%A2-w
#11
Eleni Pitsouni, Themos Grigoriadis, Matthew Falagas, Angeliki Tsiveleka, Stefano Salvatore, Stavros Athanasiou
This retrospective case-control study aimed to compare 30 versus 40 W power of CO2 laser for the therapy of genitourinary syndrome of menopause (GSM). Postmenopausal women with severe intensity of dyspareunia and dryness were eligible to be included in this study. Primary outcomes were dyspareunia and dryness. Secondary outcomes were itching/burning, dysuria, frequency and urgency, Female Sexual Function Index (FSFI), vaginal maturation value (VMV), and Vaginal Health Index Score (VHIS). One laser therapy was applied every month for 3 months...
August 2, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28762194/selective-removal-of-carious-lesion-with-er-yag-laser-followed-by-dentin-biomodification-with-chitosan
#12
Fabiana A Curylofo-Zotti, Gabriela Solano Tanta, Miriane Lucindo Zucoloto, Aline E Souza-Gabriel, Silmara A M Corona
The aim of this study was to evaluate the effect of Er:YAG laser for selective removal of carious lesion, followed by biomodification with chitosan gel where the subsurface microhardness, chemical composition, and morphological changes of the residual caries-affected dentin were examined. Artificial dentinal lesions were created by pH-cycling method (14 days) in 104 bovine specimens (5 × 5 mm). Specimens were randomly divided according to the carious removal method: bur (low-speed handpiece) or Er:YAG laser (250 mJ/4 Hz)...
August 1, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28752263/photobiomodulation-therapy-by-nir-laser-in-persistent-pain-an-analytical-study-in-the-rat
#13
Laura Micheli, Lorenzo Di Cesare Mannelli, Elena Lucarini, Francesca Cialdai, Leonardo Vignali, Carla Ghelardini, Monica Monici
Over the past three decades, physicians have used laser sources for the management of different pain conditions obtaining controversial results that call for further investigations. In order to evaluate the pain relieving possibilities of photobiomodulation therapy (PBMT), we tested two near infrared (NIR) laser systems, with different power, against various kinds of persistent hyperalgesia animal models. In rats, articular pain was reproduced by the intra-articular injection of sodium monoiodoacetate (MIA) and complete Freund's adjuvant (CFA), while compressive neuropathy was modelled by the chronic constriction injury of the sciatic nerve (CCI)...
July 28, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28752262/discrimination-model-applied-to-urinalysis-of-patients-with-diabetes-and-hypertension-aiming-at-diagnosis-of-chronic-kidney-disease-by-raman-spectroscopy
#14
Elzo Everton de Souza Vieira, Jeyse Aliana Martins Bispo, Landulfo Silveira, Adriana Barrinha Fernandes
Higher blood pressure level and poor glycemic control in diabetic patients are considered progression factors that cause faster decline in kidney functions leading to kidney damage. The present study aimed to develop a quantification model of biomarkers creatinine, urea, and glucose by means of selected peaks of these compounds, measured by Raman spectroscopy, and to estimate the concentration of these analytes in the urine of normal subjects (G_N), diabetic patients with hypertension (G_WOL) patients with chronic renal failure doing dialysis (G_D)...
July 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28752261/leishmanicidal-effect-of-antiparasitic-photodynamic-therapy-appdt-on-infected-macrophages
#15
Susana de Oliveira, Evaristo João da Ordem Trahamane, Juliana Monteiro, Gustavo Pires Santos, Pedro Crugeira, Fernando Sampaio, Camila Oliveira, Manoel Barral Neto, Antônio Pinheiro
The aim of this study is to evaluate the effects of ApPDT (antiparasitic photodynamic therapy) on the interaction of Leishmania braziliensis with J774 macrophages, used as a photosensitizer, methylene blue associated with red laser. The tests are in triplicate and the samples divided into four groups: control, photosensitizer, laser, and ApPDT. The photosensitizer used was the methylene blue at concentration of 12.5 μg/mL. The parameters of the laser were λ = 660 nm, 40 mW, and 8.4 J/cm(2). Samples are analyzed by optical microscopy through the identification and counting of infected and uninfected macrophages, parasite load, infectivity, and infection index...
July 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28748302/effect-of-combination-of-fractional-co2-laser-and-narrow-band-ultraviolet-b-versus-narrow-band-ultraviolet-b-in-the-treatment-of-non-segmental-vitiligo
#16
Mohamed Bakr El-Zawahry, Naglaa Sameh Zaki, Marian Youssry Wissa, Marwah Adly Saleh
The present study was designed to evaluate the effect of combining fractional CO2 laser with narrow-band ultraviolet B (NB-UVB) versus NB-UVB in the treatment of non-segmental vitiligo. The study included 20 patients with non-segmental stable vitiligo. They were divided into two groups. Group I received a single session of fractional CO2 laser therapy on the right side of the body followed by NB-UVB phototherapy twice per week for 8 weeks. Group II received a second session of fractional CO2 laser therapy after 4 weeks from starting treatment with NB-UVB...
July 26, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28733910/a-review-study-to-evaluate-holmium-yag-laser-lithotripsy-with-flexible-ureteroscopy-in-patients-on-ongoing-oral-anticoagulant-therapy
#17
Bulent Altay, Bulent Erkurt, Selami Albayrak
The objective of this study was to evaluate the safety and efficacy of flexible ureteroscopy (FURS) and holmium:YAG laser lithotripsy for the treatment of upper urinary tract stones in patients on active oral anticoagulants. The records of 1081 patients who underwent flexible ureteroscopic holmium:YAG (Ho:YAG) laser lithotripsy for upper ureteral and renal calculi from 1999 to 2015 were retrospectively reviewed. A total of 84 patients on continuous oral anticoagulation or antiplatelet therapy (warfarin, aspirin, or clopidogrel) were identified...
July 22, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28725994/evaluation-of-the-effects-of-photobiomodulation-on-vertebras-in-two-rat-models-of-experimental-osteoporosis
#18
Mohammadjavad Fredoni, Mahdi Ghatrehsamani, Mohammad-Amin Abdollahifar, Sahar Bayat, Mohammad Bayat
The aim of this study was to evaluate the effects of photobiomodulation (PBM) on cancellous bone in rat models of ovariectomized induced osteoporosis (OVX-D) and glucocorticoid-induced osteoporosis (GIOP). The experiment comprised of nine groups. A group of healthy rats was used for baseline evaluations. The OVX-D rats were further divided into groups as follows: control rats with osteoporosis, OVX-D rats that received alendronate (1 mg/kg 60 days), OVX-D rats treated with pulsed wave laser (890 nm, 80 Hz, 900 s, 0...
July 19, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28717890/application-of-phototherapy-for-the-healing-of-the-navels-of-neonatal-dairy-calves
#19
Ana Lúcia Borges de Souza Faria, Luis Augusto Lupato Conrado, Luiz Sergio Vanzela, Antonio Balbin Villaverde, Egberto Munin
The present work evaluated the effects of LED light irradiation on the healing of the navels of neonatal dairy calves. Fifty-seven neonatal calves were divided into two groups. Animals had their umbilical stumps immersed in 10% iodine tincture for 60 s, and this process was repeated every 24 h for three consecutive days. The 29 animals in the first group did not receive LED therapy. The 28 animals in the second group received LED light irradiation at 640 nm with 300 mW power, 46.8 J/cm(2) energy density, 60 s irradiation time, and 0...
July 17, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28712048/photobiomodulation-therapy-improves-both-inflammatory-and-fibrotic-parameters-in-experimental-model-of-lung-fibrosis-in-mice
#20
Robson Alexandre Brochetti, Mayara Peres Leal, Raíssa Rodrigues, Renata Kelly da Palma, Luis Vicente Franco de Oliveira, Anna Carolina Ratto Tempestini Horliana, Amílcar Sabino Damazo, Ana Paula Ligeiro de Oliveira, Rodolfo Paula Vieira, Adriana Lino-Dos-Santos-Franco
Lung fibrosis (LF) is a chronic and progressive lung disease characterized by pulmonary parenchyma progressive lesion, inflammatory infiltration, and interstitial fibrosis. It is developed by excessive collagen deposition and other cellular matrix components, resulting in severe changes in the alveolar architecture. Considering the absence of effective treatment, the aim of this study was to investigate the effect of photobiomodulation therapy (PBMT) on the development of PF. For this purpose, we used C57BL6 mice subjected to induction of LF by bleomycin administration (1...
July 16, 2017: Lasers in Medical Science
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