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Lasers in Medical Science

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https://www.readbyqxmd.com/read/28551764/autofluorescence-spectroscopy-for-nerve-sparing-laser-surgery-of-the-head-and-neck-the-influence-of-laser-tissue-interaction
#1
Florian Stelzle, Maximilian Rohde, Max Riemann, Nicolai Oetter, Werner Adler, Katja Tangermann-Gerk, Michael Schmidt, Christian Knipfer
The use of remote optical feedback systems represents a promising approach for minimally invasive, nerve-sparing laser surgery. Autofluorescence properties can be exploited for a fast, robust identification of nervous tissue. With regard to the crucial step towards clinical application, the impact of laser ablation on optical properties in the vicinity of structures of the head and neck has not been investigated up to now. We acquired 24,298 autofluorescence spectra from 135 tissue samples (nine ex vivo tissue types from 15 bisected pig heads) both before and after ER:YAG laser ablation...
May 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28551763/mesenchymal-stromal-cell-and-osteoblast-responses-to-oxidized-titanium-surfaces-pre-treated-with-%C3%AE-%C3%A2-%C3%A2-808%C3%A2-nm-gaalas-diode-laser-or-chlorhexidine-in-vitro-study
#2
Flaminia Chellini, Marco Giannelli, Alessia Tani, Lara Ballerini, Larissa Vallone, Daniele Nosi, Sandra Zecchi-Orlandini, Chiara Sassoli
Preservation of implant biocompatibility following peri-implantitis treatments is a crucial issue in odontostomatological practice, being closely linked to implant re-osseointegration. Our aim was to assess the responses of osteoblast-like Saos2 cells and adult human bone marrow-mesenchymal stromal cells (MSCs) to oxidized titanium surfaces (TiUnite(®), TiU) pre-treated with a 808 ± 10 nm GaAlAs diode laser operating in non-contact mode, in continuous (2 W, 400 J/cm(2); CW) or pulsed (20 kHz, 7 μs, 0...
May 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28547075/comparison-of-photobiomodulation-therapy-and-suprascapular-nerve-pulsed-radiofrequency-in-chronic-shoulder-pain-a-randomized-controlled-single-blind-clinical-trial
#3
Burcu Metin Ökmen, Korgün Ökmen
Shoulder pain can be difficult to treat due to its complex anatomic structure, and different treatment methods can be used. We aimed to examine the efficacy of photobiomodulation therapy (PBMT) and suprascapular nerve (SSN)-pulsed radiofrequency (RF) therapy. In this prospective, randomized, controlled, single-blind study, 59 patients with chronic shoulder pain due to impingement syndrome received PBMT (group H) or SSN-pulsed RF therapy (group P) in addition to exercise therapy for 14 sessions over 2 weeks...
May 25, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28547074/laser-assisted-hatching-of-human-embryos-may-two-alternative-approaches-thinning-versus-drilling-impact-on-implant-rate
#4
Francesco Padula, Stella Capriglione, Paola Iaconianni, Simona Gatti, Assunta Lippa, Salvatrice Elisa Minutolo, Diana Giannarelli, Claudio Giorlandino
No abstract text is available yet for this article.
May 25, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28547073/the-influence-of-low-intensity-he-ne-laser-on-the-wound-healing-in-diabetic-rats
#5
Maha Eissa, Wasil H M Salih
The low-level laser irradiation at certain wavelengths is reported to facilitate the healing process of diabetic wounds. Thus, this study carried out to look for the suitable laser parameters that could speed up the healing process. Fourteen healthy male and female rats were used in which a circular wound with a diameter of 2.5 ± 0.2 cm was created on the dorsum in each rat after injected them with alloxan to induced diabetic. They have been divided into two groups: control group (N = 7) and study group (N = 7) to conduct the study...
May 25, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28536905/efficacy-of-low-level-laser-therapy-in-management-of-symptomatic-oral-lichen-planus-a-systematic-review
#6
Sadeq Ali Al-Maweri, Butchibabu Kalakonda, Walid A Al-Soneidar, Hashem Motahir Al-Shamiri, Mohammed Sultan Alakhali, Nader Alaizari
Oral lichen planus (OLP) is a chronic inflammatory disease of unknown etiology and indefinite cure. This systematic review assessed the efficacy of low-level laser therapy in the treatment of symptomatic OLP. Electronic databases (PubMed, Scopus, and Web of Science) were searched from date of inception till and including December 2016, using various combinations of the following keywords: oral lichen planus, laser therapy, low-level laser therapy, and phototherapy. Owing to heterogeneity of data, no statistical analyses were conducted...
May 24, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28536904/efficacy-of-photobiomodulation-therapy-on-masseter-thickness-and-oral-health-related-quality-of-life-in-children-with-spastic-cerebral-palsy
#7
Maria Teresa Botti Rodrigues Santos, Karla Santos Nascimento, Simone Carazzato, Alina Oliveira Barros, Fausto Medeiros Mendes, Michele Baffi Diniz
The study aimed to evaluate the efficacy of photobiomodulation therapy (PBMT) on bilateral masseter muscle thickness and amplitude of mouth opening in children with spastic cerebral palsy (CP), and the impact on their oral health-related quality of life (OHRQOL). Three groups were included: experimental CP group (EG: n = 26 with oral complaints), positive control CP group (PCG: n = 26 without complaints), and negative control group (NCG: n = 26 without CP). In the EG, the masseter muscles on both sides were irradiated with an infrared low-level Ga-Al-As laser (λ = 808 ± 3 nm, 120 mW) using a 3 J/cm(2) energy dose per site, with a 20 s exposure time per site (spot area: 4 mm(2); irradiance: 3 W/cm(2); energy delivery per point: 2...
May 23, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28528395/enhancing-hair-growth-in-male-androgenetic-alopecia-by-a-combination-of-fractional-co2-laser-therapy-and-hair-growth-factors
#8
Yue Huang, Fenglin Zhuo, Linfeng Li
Laser therapy and growth factors have been used as alternative treatments for male androgenetic alopecia (MAA). The aim of this study is to determine the efficacy and safety of hair growth factors alone or combined with ablative carbon dioxide (CO2) fractional laser therapy in MAA. Twenty-eight men were enrolled in this randomized half-split study based on a left-head to right-head pattern. Fractional CO2 laser treatment was unilaterally performed; hair growth factors were bilaterally applied. Six sessions with 2-week intervals were performed...
May 21, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28528394/a-novel-dual-wavelength-laser-stimulator-to-elicit-transient-and-tonic-nociceptive-stimulation
#9
Xiaoxi Dong, Tianjun Liu, Han Wang, Jichun Yang, Zhuying Chen, Yong Hu, Yingxin Li
This study aimed to develop a new laser stimulator to elicit both transient and sustained heat stimulation with a dual-wavelength laser system as a tool for the investigation of both transient and tonic experimental models of pain. The laser stimulator used a 980-nm pulsed laser to generate transient heat stimulation and a 1940-nm continuous-wave (CW) laser to provide sustained heat stimulation. The laser with 980-nm wavelength can elicit transient pain with less thermal injury, while the 1940-nm CW laser can effectively stimulate both superficial and deep nociceptors to elicit tonic pain...
May 20, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28526914/finite-element-method-simulating-temperature-distribution-in-skin-induced-by-980-nm-pulsed-laser-based-on-pain-stimulation
#10
Han Wang, Xiao-Xi Dong, Ji-Chun Yang, He Huang, Ying-Xin Li, Hai-Xia Zhang
For predicting the temperature distribution within skin tissue in 980-nm laser-evoked potentials (LEPs) experiments, a five-layer finite element model (FEM-5) was constructed based on Pennes bio-heat conduction equation and the Lambert-Beer law. The prediction results of the FEM-5 model were verified by ex vivo pig skin and in vivo rat experiments. Thirty ex vivo pig skin samples were used to verify the temperature distribution predicted by the model. The output energy of the laser was 1.8, 3, and 4.4 J. The laser spot radius was 1 mm...
May 19, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28523391/the-effect-of-low-level-diode-laser-on-cox-2-gene-expression-in-chronic-periodontitis-patients
#11
Snezana Pesevska, Icko Gjorgoski, Kiro Ivanovski, Nikolaos K Soldatos, Nikola Angelov
Adjunctive treatments to scaling and root planing (SRP) such as lasers, have been utilized in the treatment of chronic periodontitis, mainly aiming to suppress and eliminate the bacteria, as well as enhancing the healing response. Eighty gingival papilla biopsy samples were obtained from 60 patients diagnosed with chronic advanced periodontitis; randomly assigned to three treatment groups (n = 20), as well as 20 subjects with no periodontal disease [group A]. Group B received SRP on a single quadrant/day for four consecutive days...
May 18, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28512728/treatment-of-red-tattoo-reaction-using-co2-laser
#12
José Francisco Millán-Cayetano, Adrián Alegre-Sánchez, Pablo Boixeda
No abstract text is available yet for this article.
May 17, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28512727/variability-of-high-dose-melphalan-exposure-on-oral-mucositis-in-patients-undergoing-prophylactic-low-level-laser-therapy
#13
Gustavo Henrique Rodrigues, Graziella Chagas Jaguar, Fabio Abreu Alves, Andre Guollo, Vanessa Oliveira Camandoni, Aline Santos Damascena, Vladmir Claudio Cordeiro Lima
The present study outlines the clinical impact and risk factors of oral mucositis in 79 patients with multiple myeloma following high-dose melphalan for autologous transplant. All patients underwent daily prophylactic low-level indium gallium aluminum phosphate diode laser therapy (660 nm, 15 mW, 3.75 J/cm(2), 10 s per point) from the beginning of the conditioning regimen up to day +2. Oral mucositis assessments were made daily until hospital discharge. For analysis, oral mucositis was divided into two groups according to severity: group 1, patients with oral mucositis grade <III (n = 71) and group 2, patients with oral mucositis grade ≥III (n = 8)...
May 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28508243/low-level-laser-treatment-stimulates-hair-growth-via-upregulating-wnt10b-and-%C3%AE-catenin-expression-in-c3h-hej-mice
#14
Tiran Zhang, Liqiang Liu, Jincai Fan, Jia Tian, Cheng Gan, Zengjie Yang, Hu Jiao, Bing Han, Zheng Liu
This study was conducted in order to evaluate the role of low-level laser treatment (LLLT) in hair growth in C3H/HeJ mice. Healthy C57BL/6 mice were randomly divided into two groups: with and without low-level laser treatment. The skin color of each mouse was observed each day. Skin samples were collected for H&E, immunofluorescence, PCR, and western blot analysis, to observe the morphology of hair follicles and detect the expression levels of Wnt10b and β-catenin. Observation of skin color demonstrated that black pigmentation started significantly earlier in the laser group than in the control group...
May 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28508242/preclinical-study-of-a-cost-effective-photodynamic-therapy-protocol-for-treating-oral-candidoses
#15
Nathalia Ramos da Silva, Daniela Garcia Ribeiro, João Paulo Mardegan Issa, Karla Bonfá, Michelli Sobreiro Menezes, Viviane de Cássia Oliveira, Raphael Freitas de Souza
Photodynamic therapy (PDT) is a promising treatment for oral candidoses. Its use as an alternative to antifungals prevents several adverse effects, including microbial resistance. However, most PDT protocols do not employ devices and consumables commonly available in dental practice, thus influencing treatment affordability. This study aimed to determine the efficacy of a PDT method based on light curing units' blue LEDs combined to a plaque-disclosing composition (5% erythrosine) against C. albicans in culture and in a murine model of oral candidosis...
May 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28503718/photodithazine-photodynamic-effect-on-viability-of-9l-lacz-gliosarcoma-cell-line
#16
Leticia C Fontana, Juliana G Pinto, André H C Pereira, Cristina P Soares, Leandro J Raniero, Juliana Ferreira-Strixino
Even with the advances of conventional treatment techniques, the nervous system cancer prognosis is still not favorable to the patient which makes alternative therapies needed to be studied. Photodynamic therapy (PDT) is presented as a promising therapy, which employs a photosensitive (PS) agent, light wavelength suitable for the PS agent, and molecular oxygen, producing reactive oxygen species in order to induce cell death. The aim of this study is to observe the PDT action in gliosarcoma cell using a chlorin (Photodithazine, PDZ)...
May 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28500516/nd-yag-laser-irradiation-associated-with-fluoridated-gels-containing-photo-absorbers-in-the-prevention-of-enamel-erosion
#17
Pereira Lgs, S H Joao-Souza, Sjc Bezerra, A B Borges, Acc Aranha, T Scaramucci
This study evaluated the combined effect of Nd:YAG laser irradiation and fluoridated gels containing photo absorbers against enamel erosion. Enamel specimens from bovine teeth were polished, eroded (10 min, with 1% citric acid, pH = 2.6), and randomly allocated into the experimental groups (n = 8), according to the different surface treatments: fluoridated gels (F: 9047 ppm F and F + Sn: 9047 ppm F and 3000 ppm Sn), with or without photo absorbers (E: erythrosine and MB: methylene blue), and associated or not with Nd:YAG laser irradiation (in contact; 0...
May 12, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28478504/model-study-of-combined-electrical-and-near-infrared-neural-stimulation-on-the-bullfrog-sciatic-nerve
#18
Mengxian You, Zongxia Mou
This paper implemented a model study of combined electrical and near-infrared (808 nm) neural stimulation (NINS) on the bullfrog sciatic nerve. The model includes a COMSOL model to calculate the electric-field distribution of the surrounding area of the nerve, a Monte Carlo model to simulate light transport and absorption in the bullfrog sciatic nerve during NINS, and a NEURON model to simulate the neural electrophysiology changes under electrical stimulus and laser irradiation. The optical thermal effect is considered the main mechanism during NINS...
May 6, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28474212/interstitial-pdt-using-diffuser-fiber-investigation-in-phantom-and-in-vivo-models
#19
Mirian D Stringasci, Thereza C Fortunato, Lilian T Moriyama, José Dirceu Vollet Filho, Vanderlei S Bagnato, Cristina Kurachi
Photodynamic therapy (PDT) has been used for local treatment of several types of tumors. Light penetration of biological tissue is one limiting factor in PDT, decreasing the success rates of the treatment of invasive and solid tumors. In those cases, a possible solution is to use interstitial PDT, in which both diffuser optical fibers are inserted into the tumor. The uniformity of the diffuser emission plays a crucial role in planning the delivery of the appropriate light fluence and in ensuring treatment success...
May 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28474211/raman-spectroscopy-enables-noninvasive-biochemical-identification-of-the-collagen-regeneration-in-cutaneous-wound-healing-of-diabetic-mice-treated-with-mscs
#20
Wenxia Yan, Hanping Liu, Xiaoyuan Deng, Ying Jin, Huimin Sun, Caiyun Li, Ning Wang, Jing Chu
Mesenchymal stem cells (MSCs) had been reported as a novel therapeutic strategy for non-healing diabetic cutaneous wound mainly by promoting the formation of extracellular matrix (ECM) and neovasculature. Collagen regeneration is one of the key processes of ECM remodeling in wound healing. Accordingly, rapid assessment of the collagen content in a noninvasive manner can promptly provide objective evaluation for MSC therapy of cutaneous wound healing and strength evidence to adjust therapeutic regimen. In the present study, noninvasive Raman microspectroscopy was used for tracing the regeneration status of collagen during diabetic wound healing with MSCs...
May 4, 2017: Lasers in Medical Science
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