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diode laser

Ruchi Goel, Smriti Nagpal, Sushil Kumar, Ravi Meher, Saurabh Kamal, Sonam Garg
PURPOSE: To evaluate and compare the success rate of transcanalicular laser-assisted dacryocystorhinostomy with endonasal augmentation, with and without intubation, in patients suffering from primary acquired nasolacrimal duct obstruction, at 1 year of follow up. METHODS: A prospective, randomized interventional pilot study was conducted at a tertiary care center, in accordance with the guidelines of Declaration of Helsinki. Sixty eyes of 60 adult patients with primary acquired nasolacrimal duct obstruction were included...
October 20, 2016: Ophthalmic Plastic and Reconstructive Surgery
Jiajia Li, Chunlai Ding, Zhengbiao Zhang, Xiangqiang Pan, Na Li, Jian Zhu, Xiulin Zhu
Butyl acrylate is polymerized in the living way under the irradiation of purple light-emitting diode (LED) or sunlight without photocatalyst at ambient temperature. 2-((Phenoxycarbonothioyl)thio) ethyl propanoate) is exclusively added and acted as an initiator and a chain transfer agent simultaneously in the current system. Poly(butyl acrylate) with well-regulated molecular weight and relatively narrow molecular weight distribution (Ð < 1.30) is synthesized. High conversion (>95%) can be achieved within several minutes...
October 21, 2016: Macromolecular Rapid Communications
J H Liang, Y Cheng, X Deng, Y Y Yu, X X Li
: Objective: To evaluate the efficacy of large spot indirect ophthalmoscopy laser alone or combined with systemic chemotherapy in the treatment of early and middle stage retinoblastoma. Methods: Retrospective series case study. Clinical data of 21 patients (22 eyes) who were diagnosed as retinoblastoma (RB) in Peking University People's Hospital from March 2009 to August 2014 were collected. Medical and family history, ocular ultrasound, orbital and cranial MRI or CT examination of RB Children were detailed recorded...
October 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
R Crippa, M Paglia, F Ferrante, A Ottonello, F Angiero
: BACKGROUND Often breastfeeding problems experienced by mothers and their babies may be attributed to the abnormal attachment of the infant's tongue (ankyloglossia) and/or maxillary lip-tie. Proper breastfeeding depends upon an infant's ability to correctly latch onto its mother's breast. If born with oral soft tissue abnormalities such as tongue-tie or lip-tie, it may be almost impossible for the infant to breastfeed. During the oral evaluation of an infant presenting with breastfeeding problems, one factor that is often overlooked and undiagnosed - and thus untreated - is the attachment of the upper lip to the maxillary gingival tissue...
September 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
Brenda Gomes Fanchiotti, Marcella Piffer Zamprogno Machado, Letícia Camilato de Paula, Mahmut Durmuş, Tebello Nyokong, Arlan da Silva Gonçalves, André Romero da Silva
The photobleaching of an unsubstituted phthalocyanine (gallium(III) phthalocyanine chloride (GaPc)) and a substituted phthalocyanine (1,4-(tetrakis[4-(benzyloxy)phenoxy]phthalocyaninato) indium(III) chloride (InTBPPc)) was monitored for the free photosensitizers and for the phthalocyanines encapsulated into nanoparticles of PEGylated poly(D,L-lactide-co-glycolide) (PLGA-PEG). Phosphate-buffered solutions (PBS) and organic solutions of the free GaPc or the free InTBPPc, and suspensions of each encapsulated photosensitizer (2-15μmol/L) were irradiated using a laser diode of 665nm with a power of 1-104mW and a light dose of 7...
October 11, 2016: Journal of Photochemistry and Photobiology. B, Biology
Mario Migliario, Manuela Rizzi, Alberta Greco Lucchina, Filippo Renò
The gold standard to arrange impacted teeth in the dental arch is represented by a surgical approach followed by orthodontic traction force application. In the literature, many surgical approaches are proposed to reach such a scope. The aim of the present study is to demonstrate how laser technique could positively assist surgical approaches.Study population was composed by 16 patients undergoing orthodontic treatment of 20 impacted teeth. In 10 patients (population A) surgical exposure of the impacted teeth was performed using a 980 nm diode laser, while in the other 10 patients (population B), surgical incision was performed using a traditional lancet...
October 14, 2016: Journal of Craniofacial Surgery
Thomas P J Blaikie, John Howard Couper, Gus Hancock, Philip L Hurst, Robert Peverall, Graham Richmond, Grant A D Ritchie, David Taylor, Kevin Valentine
A portable and compact device is demonstrated for measuring acetone in breath samples. The device features a 7 cm long high finesse optical cavity as an optical sensor that is coupled to a miniature adsorption preconcentrator containing 0.5 g of polymer material. Acetone is trapped out of breath and released into the optical cavity where it is probed by a near-infrared diode laser operating at ~1670 nm. With an optical cavity mirror reflectivity of 99.994 % a limit of detection of 159 ppbv (1σ) is demonstrated on samples from breath bags...
October 18, 2016: Analytical Chemistry
Michael R Hamblin
Photobiomodulation (PBM) describes the use of red or near-infrared light to stimulate, heal, regenerate, and protect tissue that has either been injured, is degenerating, or else is at risk of dying. One of the organ systems of the human body that is most necessary to life, and whose optimum functioning is most worried about by humankind in general, is the brain. The brain suffers from many different disorders that can be classified into three broad groupings: traumatic events (stroke, traumatic brain injury, and global ischemia), degenerative diseases (dementia, Alzheimer's and Parkinson's), and psychiatric disorders (depression, anxiety, post traumatic stress disorder)...
December 2016: BBA Clinical
Amita Rani, Sujata Mohanty, Pankaj Sharma, Jitender Dabas
INTRODUCTION: Alveolar osteitis (AO) is a well-known complication following tooth extraction. Plethora of literature is available regarding its treatment modalities signifying that none of the treatment is as effective as any another treatment. LASER on the other hand, has been used to promote soft tissue healing. MATERIAL AND METHOD: In order to evaluate the effects of laser on healing of AO we undertook a randomized clinical trial. In the trial, sixty patients diagnosed with AO were randomly divided into three groups viz: alvogyl, diode laser and Er:Cr:YSGG laser (erbium chromium yttrium scandium gallium garnet)...
September 2016: Journal of Maxillofacial and Oral Surgery
Shehab Ahmed Hamad, Jandar S Naif, Mahdi A Abdullah
OBJECTIVES: To evaluate the effect of low-level laser therapy on healing of extracted tooth socket of healthy rabbits. DESIGN: The sample of this study was 20 male rabbits of 2-2.5 kg weight with age range of 8-12 months. Right and left lower first premolar teeth were extracted. The extraction sockets of lower right first premolar were irradiated with 0.9 W gallium-aluminum-arsenide (GaAlAs) diode laser for 5 min, immediately after extraction and then every 72 h for the next 12 days...
September 2016: Journal of Maxillofacial and Oral Surgery
Min Won Lee, Fadwa Baladi, Jean-René Burie, Mauro A Bettiati, Azzedine Boudrioua, Alexis P A Fischer
Rogue waves are observed for the first time, to the best of our knowledge, in a 980 nm laser diode subject to filtered optical feedback via a fiber Bragg grating. By counting the number of rogue waves in a fixed time window, a rogue wave map is established experimentally as a function of both the optical feedback ratio and the laser current. The comparison with low frequency fluctuations (LFFs) reveals that the rogue waves observed in our system are, in fact, LFF jump-ups.
October 1, 2016: Optics Letters
Erica Dos Santos Carvalho, Rogério Hadid Rosa, Flávia de Moura Pereira, Ana Lia Anbinder, Isabel Mello, Sandra Marcia Habitante, Denise Pontes Raldi
The search for effective protocols to reduce the incidence of root resorptions and allow periodontal ligament repair is still challenging, given the unpredictable outcome of late tooth replantation. The aim of this study was to assess the effects of both high-power diode laser irradiation (DL) and basic fibroblast growth factor (FGF) on the periodontal healing of replanted teeth after extended extra-oral dry time METHODS: Maxillary incisors of 50 male rats were extracted and assigned to three experimental and two control groups (n = 10)...
October 17, 2016: Dental Traumatology: Official Publication of International Association for Dental Traumatology
Akiko Haruyama, Atsushi Kameyama, Junji Kato, Shinji Takemoto, Yutaka Oda, Eiji Kawada, Toshiyuki Takahashi, Masahiro Furusawa
This study evaluated the microtensile bond strength (μTBS) of 1-step self-etch adhesives (1-SEAs) and 2-step self-etch adhesives (2-SEAs) to pulp chamber dentin immediately after bleaching with 2 types of common bleaching techniques. Pulp chamber dentin of bovine teeth was bleached using 30% hydrogen peroxide (H2O2) solution with quartz-tungsten-halogen light-curing unit (Group 1) and 3.5% H2O2-containing titanium dioxide (TiO2) (Pyrenees®) activated with 405-nm violet diode laser for 15 min (Group 2). Unbleached specimens were placed in distilled water for 15 min and used as controls...
2016: BioMed Research International
Maryam Pourhajibagher, Nasim Chiniforush, Roghayeh Ghorbanzadeh, Abbas Bahador
BACKGROUND: Photo-activated disinfection (PAD) is a novel treatment approach, in which bacteria in the root canal system may be exposed to sub-lethal doses of PAD. Such exposure can affect bacterial survival and virulence features, such as biofilm formation ability. The aim of this study was to evaluate the effects of sub-lethal doses of PAD (sPAD) using indocyanine green (ICG) on load and biofilm formation ability of Porphyromonas gingivalis as an anaerobic bacterium associated with endodontic infection...
October 12, 2016: Photodiagnosis and Photodynamic Therapy
Atsushi Tabuchi, Hisao Masaki, Yasuhiro Yunoki, Yoshiko Watanabe, Hiroshi Furukawa, Takahiko Yamasawa, Hiroki Takiuchi, Takeshi Honda, Noriaki Kuwada, Kenji Kojima, Kazuo Tanemoto
We performed a comparative study of surgical outcomes and venous functions between endovenous laser ablation with a 980-nm diode laser (EV group) and thigh stripping (ST group). There were no severe complications and initial success rates were 100% in both groups. In the EV group, preoperative symptoms improved in 94.3% of cases, the venous occlusion rate was 98%, and endovenous heat induced thrombosis had occurred in 11.9% (Class 3: 0.7%) at 12 months after the operation. Although comparative study of postoperative venous function by air plethysmography showed significant improvement in both groups, there was less recovery of postoperative venous function in the EV than in the ST group...
2016: Annals of Vascular Diseases
Raydsa Raíssa Moura Rosa, Francielle Karoline Santos Calazans, Ruchele Dias Nogueira, Ailla Carla Rocha Acosta Lancellotti, Luciano de Sousa Gonçalves, Vinícius Rangel Geraldo-Martins
The objective of this study was to evaluate the effects of diode laser and a desensitizing dentifrice on dentin permeability. Fifty-two root dentin fragments were obtained (5 × 5mm) and treated with 24% EDTA gel. The samples were divided into 4 groups (n = 13): G1, control (no treatment); G2, diode laser (λ = 908 nm, 1.5 W, continuous mode, 20s); G3, application of abrasive dentifrice for 1 minute (Elmex Sensitive Professional (International Gaba); and G4, application of abrasive dentifrice for 1 minute followed by irradiation with diode laser...
October 10, 2016: Brazilian Oral Research
Felice Femiano, Rossella Femiano, Alessandro Lanza, Michele Lanza, Letizia Perillo
This study compares sensitivity reduction after dental restoration with and without prior diode laser (DL) irradiation for cervical dentine hypersensitivity (CDH) from non-carious cervical lesions (NCCLs) unresponsive to desensitizing agents. Eighty-eight teeth of 28 subjects (21 females; age 23-64 years), with CDH from NCCL were included in this study. NCCLs of each oral quadrant were randomized in two groups (study group (SG)) to estimate the sensitivity reduction after dental restoration (SG-1) compared with the DL irradiation used prior to restoration placement (SG-2)...
October 12, 2016: Lasers in Medical Science
Y Chen, Kevin K Lehmann, Y Peng, L M Pratt, J R White, S B Cadieux, B Sherwood Lollar, G Lacrampe-Couloume, T C Onstott
In this study, near-infrared continuous wave cavity ring-down spectroscopy was applied to the measurement of the δ(2)H of methane (CH4). The cavity ring-down spectrometer (CRDS) system consisted of multiple DFB laser diodes to optimize selection of spectral line pairs. By rapidly switching measurements between spectral line peaks and the baseline regions, the long-term instrumental drift was minimized, substantially increasing measurement precision. The CRDS system coupled with a cryogenic pre-concentrator measured the δ(2)H of terrestrial atmospheric CH4 from 3 standard liters of air with a precision of ±1...
October 2016: Astrobiology
P D Karkos, M Stavrakas, K Markou
Transoral laser Assisted Microsurgical resection, Radiotherapy or Open partial laryngeal surgery are the management options for early glottic cancer. When endoscopic access is difficult(1-4) , radiotherapy or open surgery seems to be the other available options. The oncological safety of a Flexible Endoscopic Diode Laryngeal Laser Assisted Surgical (FEDLAS) Technique for patients with early glottic cancer and difficult laryngoscopy was tested in a preliminary pilot study. Patients with Grade three or more laryngoscopy(Cormack-Lehane classification)(5) and biopsy proven glottic cancer were included in the study...
October 11, 2016: Clinical Otolaryngology
Patricia J Simner, Gail L Woods, Nancy L Wengenack
The immunocompromised host is at increased risk of Mycobacterium tuberculosis complex and nontuberculous mycobacteria infection. Although Mycobacterium tuberculosis complex is a significant mycobacterial pathogen, nontuberculous mycobacteria causes substantial disease in those with suppressed immune responses. Mycobacterial infections can cause significant morbidity and mortality in this patient population, and rapid identification and susceptibility testing of the mycobacterial species is paramount to patient management and outcomes...
August 2016: Microbiology Spectrum
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