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Lasers in Medical Science

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https://www.readbyqxmd.com/read/28725994/evaluation-of-the-effects-of-photobiomodulation-on-vertebras-in-two-rat-models-of-experimental-osteoporosis
#1
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
#2
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
#3
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
https://www.readbyqxmd.com/read/28710660/fractional-er-yag-laser-assisting-topical-betamethasone-solution-in-combination-with-nb-uvb-for-resistant-non-segmental-vitiligo
#4
Ru Yan, Jinping Yuan, Hongqiang Chen, Yuan-Hong Li, Yan Wu, Xing-Hua Gao, Hong-Duo Chen
Resistant non-segmental vitiligo is difficult to be treated. Ablative erbium-YAG (Er:YAG) laser has been used in the treatment of vitiligo, but the ablation of entire epidermis frustrated the compliance of patients. The purpose of this study is to investigate the effects of fractional Er:YAG laser followed by topical betamethasone and narrow band ultraviolet B (NB-UVB) therapy in the treatment of resistant non-segmental vitiligo. The vitiligo lesions of each enrolled patient were divided into four treatment parts, which were all irradiated with NB-UVB...
July 14, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28707034/randomized-controlled-trial-comparing-nd-yag-laser-photocoagulation-and-bipolar-electrocautery-in-the-management-of-epistaxis
#5
Jing Zhang, Luhong Cao, Chunsheng Wei
The objective of this study is to evaluate the efficacy and degree of comfort of Nd:YAG laser photocoagulation compared to bipolar electrocautery in the management of epistaxis. Seventy-two consecutive patients with a history of epistaxis were randomly assigned to receive treatment in an outpatient setting consisting of either bipolar electrocautery (group 1) or Nd:YAG laser photocoagulation (group 2). The study was conducted in university-affiliated teaching hospital. Seventy-two consecutive patients who suffered from anterior epistaxis and presented to the Otolaryngology Department at the Eye, Ear, Nose and Throat Hospital, Fudan University, between June 2015 and August 2015...
July 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28702841/comparison-of-ketamine-and-ketofol-for-deep-sedation-and-analgesia-in-children-undergoing-laser-procedure
#6
Marija Stevic, Nina Ristic, Ivana Budic, Nebojsa Ladjevic, Branislav Trifunovic, Ivan Rakic, Marko Majstorovic, Ivana Burazor, Dusica Simic
The aim of our study was to research and evaluate cardiovascular and respiratory stability, clinical efficacy, and safety of two different anesthetic agents in pediatric patients who underwent Pulse dye (wavelength 595 nm, pulse duration 0-40 ms, power 0-40 J) and CO2 (wavelength 10,600 nm, intensity-fraxel mod with SX index 4 to 8, power 0-30 W) laser procedure. This prospective non-blinded study included 203 pediatric patients ASA I-II, aged between 1 month and 12 years who underwent short-term procedural sedation and analgesia for the laser procedure...
July 12, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28699044/uva1-vs-narrowband-uvb-phototherapy-in-the-treatment-of-palmoplantar-pustulosis-a-pilot-randomized-controlled-study
#7
Li-Na Su, Jie Ren, Shi-Meng Cheng, Jian-Lan Liu, Yang-Feng Ding, Ning-Wen Zhu
UVA1 phototherapy, a new therapeutic approach, has recently been shown good efficacy in the treatment of palmoplantar pustulosis (PPP). The purpose of this study was to compare the efficacy of UVA1 and narrowband UVB (NB-UVB) therapy in the treatment of PPP. Patients with PPP were randomly assigned to either UVA1 or NB-UVB therapy according to a left-right randomization table. Both treatments were performed three times weekly for up to 30 sessions. Clinical evaluation was based on the Palmoplantar Pustular Psoriasis Area and Severity Index (PPPASI) score...
July 11, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28699043/noninvasive-assessment-of-cutaneous-alterations-in-mice-exposed-to-whole-body-gamma-irradiation-using-optical-imaging-techniques
#8
P Sharma, K Sahu, P K Kushwaha, S Kumar, M K Swami, J Kumawat, H S Patel, S Kher, P K Sahani, G Haridas, P K Gupta
We report the results of a study carried out to investigate the potential of optical techniques such as optical coherence tomography, Mueller matrix spectroscopy, and cross-polarization imaging for noninvasive monitoring of the ionizing radiation exposure-induced alterations in cutaneous tissue of mice. Radiation dose-dependent changes were observed in tissue microvasculature and tissue optical parameters like retardance and depolarization as early as 1 h post radiation exposure. Results suggest that these optical techniques may allow early detection of radiation dose-dependent alterations which could help in screening of population exposed to radiation...
July 11, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28695365/influence-of-external-cooling-on-the-femtosecond-laser-ablation-of-dentin
#9
Q T Le, R Vilar, C Bertrand
In the present work, the influence of external cooling on the temperature rise in the tooth pulpal chamber during femtosecond laser ablation was investigated. The influence of the cooling method on the morphology and constitution of the laser-treated surfaces was studied as well. The ablation experiments were performed on dentin specimens using an Yb:KYW chirped-pulse-regenerative amplification laser system (560 fs, 1030 nm). Cavities were created by scanning the specimens at a velocity of 5 mm/s while pulsing the stationary laser beam at 1 kHz and with fluences in the range of 2-14 J/cm(2)...
July 11, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28685202/spectrophotometric-analysis-of-the-effectiveness-of-a-novel-in-office-laser-assisted-tooth-bleaching-method-using-er-cr-ysgg-laser
#10
Dimitrios Dionysopoulos, Dimitrios Strakas, Kosmas Tolidis, Effrosyni Tsitrou, Effimia Koumpia, Eugenia Koliniotou-Koumpia
The purpose of this in vitro study was to compare the effectiveness of a novel Er,Cr:YSGG laser-assisted in-office tooth bleaching method with a conventional method by spectrophotometric analysis of the tooth color change. Furthermore, the influence of the application time of the bleaching gel on the effectiveness of the methods and the maintenance of the results 7 days and 1 month after the treatments were also evaluated. Twenty-four bovine incisors were stained and randomly distributed into four groups...
July 7, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28685201/longitudinal-changes-in-erectile-function-after-thulium-yag-prostatectomy-for-the-treatment-of-benign-prostatic-obstruction-a-1-year-follow-up-study
#11
Jae Seung Chung, Sang Hyun Park, Cheol Kyu Oh, Seong Cheol Kim, Taek Sang Kim, Pil Moon Kang, Won Ik Seo, Wan Seok Kim, Jang Ho Yoon, Dong Ii Kang, Kweon Sik Min, Jae Ii Chung
This study aimed to evaluate the impact of thulium:yttrium-aluminum-garnet (Tm:YAG) (RevoLix®) laser prostatectomy for the treatment of benign prostatic obstructions on erectile function (EF). A total of 208 patients who underwent Tm:YAG laser prostatectomies participated in this study. All cases were evaluated preoperatively and at 3, 6, and 12 months postoperatively using the International Prostate Symptom Score (IPSS), quality of life (QoL) score, and the International Index of Erectile Function (IIEF-5) questionnaires...
July 6, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28681086/effect-of-low-level-laser-treated-mesenchymal-stem-cells-on-myocardial-infarction
#12
Zaynab H El Gammal, Amr M Zaher, Nagwa El-Badri
Cardiovascular disease is the leading cause of death worldwide. Although cardiac transplantation is considered the most effective therapy for end-stage cardiac diseases, it is limited by the availability of matching donors and the complications of the immune suppressive regimen used to prevent graft rejection. Application of stem cell therapy in experimental animal models was shown to reverse cardiac remodeling, attenuate cardiac fibrosis, improve heart functions, and stimulate angiogenesis. The efficacy of stem cell therapy can be amplified by low-level laser radiation...
July 6, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28681085/reflectance-confocal-microscopic-evaluation-of-nonmelanocytic-lip-lesions
#13
Işın Sinem Bağcı, Mehmet Salih Gürel, Ayşe Esra Koku Aksu, Aslı Turgut Erdemir, Esma İnan Yüksel, Yeliz Karakoca Başaran
Lips display various benign and malignant lesions. Considering their functional and cosmetic importance, noninvasive diagnostic methods are required. In vivo reflectance confocal microscopy (RCM) has already been reported to be useful in the evaluation of various skin lesions. The aim of this study was to define the RCM features of nonmelanocytic lip lesions, compare them with healthy lip, and demonstrate the applicability of RCM as a noninvasive diagnostic method for nonmelanocytic lip lesions. Sixty-seven patients with premalignant/malignant, inflammatory, and infectious lip lesions and twenty-one healthy volunteers were included in the study...
July 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28681084/photobiomodulation-therapy-action-in-wound-repair-skin-induced-in-aged-rats-old-time-course-of-biomarkers-inflammatory-and-repair
#14
Franciane Barbieri Fiorio, Solange Almeida Dos Santos, Caroline Sobral de Melo Rambo, Camila Guerra Dalbosco, Andrey Jorge Serra, Brunno Lemes de Melo, Ernesto Cesar Pinto Leal-Junior, Paulo de Tarso Camillo de Carvalho
Previous studies have discussed an inverse correlation between age and wound healing, because it relates to the association of aging with a gradual decrease in healing capacity. Treatment with photobiomodulation therapy (PBMT) improves wound healing by inducing increases in mitotic activity, numbers of fibroblasts, collagen synthesis, and neovascularization. Therefore, this study aimed to evaluate the effects of PBMT in cutaneous wound healing in aged rats. A punch biopsy of 8 mm in diameter was performed to produce a skin wound...
July 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28674791/effects-of-the-gaalas-diode-laser-780%C3%A2-nm-on-the-periodontal-tissues-during-orthodontic-tooth-movement-in-diabetes-rats-histomorphological-and-immunohistochemical-analysis
#15
Mônica Fernandes Gomes, Maria da Graças Vilela Goulart, Lilian Chrystiane Giannasi, Cybelle Mori Hiraoka, Gabriela de Fátima Santana Melo, Aretha Graziela Vilela de Sousa, Celestino José Prudente Nóbrega, Renato Amaro Zangaro, Miguel Angel Castillo Salgado
The purposes of the present study are to assess the effects of the GaAlAs diode laser on the periodontal tissues and to investigate its action on the alveolar bone remodeling process during orthodontic tooth movement in normoglycemic and diabetic rats. Sixty adult male Wistar rats were divided into four groups of 15 rats: normoglycemic (N), diabetic (D), laser-normoglycemic (LN), and laser-diabetic (LD) rats. Diabetes mellitus was induced by a single intravenous injection of 40 mg/kg monohydrated alloxan. The orthodontically moved tooth underwent a force magnitude of 20 cN...
July 3, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28674790/curcumin-photodynamic-effect-in-the-treatment-of-the-induced-periodontitis-in-rats
#16
Letícia Helena Theodoro, Marcio Luiz Ferro-Alves, Mariéllen Longo, Marta Aparecida Alberton Nuernberg, Renata Pironato Ferreira, Adriele Andreati, Edilson Ervolino, Cristiane Duque, Valdir Gouveia Garcia
This study assessed the effect of curcumin as a photosensitizer in antimicrobial photodynamic therapy (aPDT) for the treatment of induced periodontitis in rats. Periodontitis was induced via a ligature around the mandibular first molar on the left side of 96 rats. The ligature was removed 7 days later, and the animals were randomized into four groups: NT, no local treatment; CUR, irrigation with curcumin solution (40 μM); LED, irradiation with a light-emitting diode (LED, InGaN, 465-485 nm, 200 mW/cm(2), 60 s); and aPDT, irrigation with curcumin solution (40 μM) followed by irradiation with LED...
July 3, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28674789/gold-coated-magnetic-nanoparticle-as-a-nanotheranostic-agent-for-magnetic-resonance-imaging-and-photothermal-therapy-of-cancer
#17
Nazila Eyvazzadeh, Ali Shakeri-Zadeh, Reza Fekrazad, Elahe Amini, Habib Ghaznavi, S Kamran Kamrava
Because of their great scientific and technological potentials, iron oxide nanoparticles (IONPs) have been the focus of extensive investigations in biomedicine over the past decade. Additionally, the surface plasmon resonance effect of gold nanoparticles (AuNPs) makes them a good candidate for photothermal therapy applications. The unique properties of both IONPs (magnetic) and AuNPs (surface plasmon resonance) may lead to the development of a multi-modal nanoplatform to be used as a magnetic resonance imaging (MRI) contrast agent and as a nanoheater for photothermal therapy...
July 3, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28669068/evaluation-of-laser-fluorescence-in-monitoring-non-cavitated-caries-lesion-progression-on-smooth-surfaces-in-vitro
#18
J A Rodrigues, C S Sarti, C M Assunção, R A Arthur, A Lussi, M B Diniz
The aim of this study was to evaluate the performance of a pen-type laser fluorescence (LF) device (LFpen: DIAGNOdent pen) to detect and monitor the progression of caries-like lesions on smooth surfaces. Fifty-two bovine enamel blocks were submitted to three different demineralisation cycles for caries-like lesion induction using Streptococcus mutans, Lactobacillus casei and Actinomyces naeslundii. At baseline and after each cycle, the enamel blocks were analysed under Knoop surface micro-hardness (SMH) and an LFpen...
July 2, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28669067/determining-the-optimal-dose-of-1940-nm-thulium-fiber-laser-for-assisting-the-endodontic-treatment
#19
Ayse Sena Kabas Sarp, Murat Gulsoy
Insufficient cleaning, the complex anatomy of the root canal system, inaccessible accessory canals, and inadequate penetration of irrigants through dentinal tubules minimizes the success of the conventional endodontic treatment. Laser-assisted endodontic treatment enhances the quality of conventional treatment, but each laser wavelength has its own its own limitations. The optimal parameters for the antibacterial efficiency of a new wavelength, 1940-nm Thulium Fiber Laser, were firstly investigated in this study...
July 1, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28667508/laser-irradiation-promotes-the-proliferation-of-mouse-pre-osteoblast-cell-line-mc3t3-e1-through-hedgehog-signaling-pathway
#20
Qiushi Li, Yingxin Chen, Shujun Dong, Shujie Liu, Xiaodan Zhang, Xi Si, Yanmin Zhou
Low-level laser could promote osteoblast proliferation, and it has been applied in clinical practice to promote wound healing and tissue regeneration. However, the mechanism related to laser irradiation remains unclear. This study aimed to investigate the effects of low-level laser irradiation on the cell proliferation and the expressions of hedgehog signaling molecules Indian hedgehog (Ihh), Ptch, and Gli in vitro. In our present study, the MTT method was used to evaluate the effect on cell proliferation of laser irradiation on MC3T3-E1 cells...
July 1, 2017: Lasers in Medical Science
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