keyword
MENU ▼
Read by QxMD icon Read
search

YAG laser

keyword
https://www.readbyqxmd.com/read/28815247/-changes-of-cementum-endotoxin-levels-in-different-teeth-with-periodontitis-treated-with-root-conditioning
#1
Chang-Sheng Fu, Rong-Sen Liu, Yun Luo, Long Ou, Ying-Chao Li, Xian-Hua Zhang
PURPOSE: To observe the changes of endotoxin levels after different teeth with periodontitis were treated with different methods. METHODS: Six healthy premolars extracted for orthodontic reasons and 36 posterior teeth extracted due to severe periodontitis were selected. Each tooth was processed from two 4 mm×4 mm×1 mm cementum pieces 2 mm under the cementum-enamel junction, each tooth with periodontitis was numbered. Healthy teeth served as negative control group, one of the two tablets from each tooth with periodontitis was selected in the periodontitis group, which was not treated with root surface treatment...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28812164/efficacy-of-fractional-lasers-in-treating-alopecia-a-literature-review
#2
Marina Perper, Adam S Aldahan, Rachel A Fayne, Christopher P Emerson, Keyvan Nouri
Hair loss stemming from different types of alopecia, such as androgenic alopecia and alopecia areata, negatively affects over half the population and, in many circumstances, causes serious psychosocial distress. Current treatment options for alopecia, such as minoxidil, anthralin, and intralesional corticosteroids, vary efficacy and side effect profiles. It is known that low-level laser/light therapies (LLLT), or photobiomodulations, such as the US FDA-cleared HairMax Lasercomb®, He-Ne laser, and excimer laser, are relatively affordable, user-friendly, safe, and effective forms of treatment for hair loss...
August 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28812042/visual-outcomes-24%C3%A2-months-after-laserace
#3
AnnMarie Hipsley, David Hui-Kang Ma, Chi-Chin Sun, Mitchell A Jackson, Daniel Goldberg, Brad Hall
BACKGROUND: To evaluate the effects on near and intermediate visual performance after bilateral Laser Anterior Ciliary Excision (LaserACE) procedure. METHODS: LaserACE surgery was performed using the VisioLite 2.94 μm erbium: yttrium-aluminum-garnet (Er:YAG) ophthalmic laser system in 4 oblique quadrants on the sclera over the ciliary muscle in 3 critical zones of physiological importance (over the ciliary muscles and posterior zonules) with the aim to improve natural dynamic accommodative forces...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28809895/1-5%C3%A2-%C3%A2-kw-efficient-cw-nd-yag-planar-waveguide-mopa-laser
#4
Juntao Wang, Zhenhai Wu, Hua Su, Tangjian Zhou, Jun Lei, Wenqiang Lv, Jing He, Liu Xu, Yuejian Chen, Dan Wang, Lixin Tong, Hao Hu, Qingsong Gao, Chun Tang
In this Letter, we report a 1064 nm continuous wave Nd:YAG planar waveguide laser with an output power of 1544 W based on the structure of the master oscillator power amplification. A fiber laser is used as the master oscillator, and diode laser arrays are used as the pump source of the waveguide laser amplifier. The dimension of the waveguide is 1  mm (T)×10  mm (W)×60  mm (L), and the dual end oblique pumping is adopted with different angles. After a single-pass amplification, the power is scaled from 323 to 1544 W with the pump power of 2480 W, leading to an optical-to-optical efficiency of 49%...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28809891/high-power-and-high-conversion-efficiency-deep-ultraviolet-duv-laser-at-258%C3%A2-%C3%A2-nm-generation-in-the-cslib6o10-clbo-crystal-with-a-beam-quality-of-m-2-1-5
#5
Hongwen Xuan, Chen Qu, Shinji Ito, Yohei Kobayashi
We report a 10 kHz, 10.5 W deep ultraviolet (DUV) laser at 258 nm with a pulse duration of 3 ns by fourth-harmonic generation (FHG) in a CsLiB6O10 crystal with high-conversion efficiency. The fundamental laser is at 1030 nm with 35 W output power consisting of a Yb:YAG ceramics thin rod amplifier. The M(2) of the DUV laser was confirmed to be <1.5. To the best of our knowledge, this is the best beam quality for DUV laser power higher than 10 W generated by FHG of a solid-state laser, as well as the highest conversion efficiency of 31% from infrared to DUV so far...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28809365/type-of-surgical-treatment-and-recurrence-of-oral-leukoplakia-a-retrospective-clinical-study
#6
L Monteiro, C Barbieri, S Warnakulasuriya, M Martins, F Salazar, J-J Pacheco, P Vescovi, M Meleti
BACKGROUND: Oral leukoplakia (OL) is the most typical potentially malignant disorder of the oral mucosa. We aimed to evaluate the clinical outcome of oral leukoplakia treated with several types of lasers and with the use of quantic molecular resonance (QMR) lancet, in terms of recurrence rate. MATERIAL AND METHODS: Eighty-seven previously untreated OL (52 occurring in females and 35 in males, mean age of 59.4 ± 13.9 years) were consecutively submitted to surgical treatment at University Hospital of Parma, Italy, and Hospital de Valongo, Portugal, (1999 to 2012)...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28806426/comparative-evaluation-of-the-effect-of-laser-etching-on-the-shear-bond-strength-of-crowns-cemented-with-two-different-luting-agents-an-in-vitro-study
#7
Ankur Dahiya, Paresh Gandhi, Nadim Z Baba
PURPOSE: The aim of this study was to compare the shear bond strength of crowns cemented on natural teeth after surface treatment of the enamel with an erbium-doped yttrium aluminum garnet (Er:YAG) laser. MATERIALS AND METHODS: Crown preparation was done for 40 full-metal crowns, and wax patterns with loops were cast in a cobalt-chromium alloy. The Er:YAG laser was used for surface treatment of some teeth, and teeth without surface treatment acted as the control...
August 14, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28799650/facial-microcirculatory-and-biomechanical-skin-properties-after-single-high-energy-er-yag-laser-application
#8
Fabian Medved, Antonia Wurm, Manuel Held
OBJECTIVE: Owing to skin aging and the growing demand for skin rejuvenation, minimal invasive aesthetic treatments such as laser procedures are increasingly coming into focus. However, until now, little has been known about the objective effects of these procedures with respect to skin microcirculation or changes in skin elasticity. STUDY DESIGN: Facial skin rejuvenation was performed on 32 volunteers using ablative Erbium: YAG laser. Skin microcirculation and skin elasticity have then been evaluated objectively...
August 11, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28792112/a-pilot-study-of-treatment-of-striae-distensae-with-variable-square-pulse-erbium-yag-laser-resurfacing
#9
Rungsima Wanitphakdeedecha, Walailak Meeprathom, Woraphong Manuskiatti
BACKGROUND: Striae distensae (SD) are a frequent skin condition for which treatment remains a challenge. Various laser treatments have been employed to remove the epidermis and cause dermal wound and heating with subsequent dermal collagen remodeling. OBJECTIVE: To determine the efficacy and safety of a variable square pulse Erbium: YAG (VSP Er:YAG) laser for the treatment of striae in skin phototypes III-IV. METHODS: Twenty-one women with SD were treated monthly for 2 months with VSP Er:YAG laser resurfacing using a 7-mm spot size...
August 9, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28791605/laser-and-light-treatments-for-hair-reduction-in-fitzpatrick-skin-types-iv-vi-a-comprehensive-review-of-the-literature
#10
REVIEW
Rachel A Fayne, Marina Perper, Ariel E Eber, Adam S Aldahan, Keyvan Nouri
Unwanted facial and body hair presents as a common finding in many patients, such as females with hirsutism. With advances in laser and light technology, a clinically significant reduction in hair can be achieved in patients with light skin. However, in patients with darker skin, Fitzpatrick skin types (FST) IV-VI, the higher melanin content of the skin interferes with the proposed mechanism of laser-induced selective photothermolysis, which is to target the melanin in the hair follicle to cause permanent destruction of hair bulge stem cells...
August 8, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28791302/in-vitro-laser-treatment-platform-construction-with-dental-implant-thread-surface-on-bacterial-adhesion-for-peri-implantitis
#11
Hsien-Nan Kuo, Hsiang-I Mei, Tung-Kuan Liu, Tse-Ying Liu, Lun-Jou Lo, Chun-Li Lin
This study constructs a standard in vitro laser treatment platform with dental implant thread surface on bacterial adhesion for peri-implantitis at different tooth positions. The standard clinical adult tooth jaw model was scanned to construct the digital model with 6 mm bone loss depth on behalf of serious peri-implantitis at the incisor, first premolar, and first molar. A cylindrical suite connected to the implant and each tooth root in the jaw model was designed as one experimental unit set to allow the suite to be replaced for individual bacterial adhesion...
2017: BioMed Research International
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
#12
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/28776112/laser-treatments-of-active-acne
#13
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/28774511/resident-performed-neodymium-yag-laser-posterior-capsulotomy
#14
Khalil Ghasemi Falavarjani, Mohammadreza Aghamirsalim, Kaveh Abri Aghdam
OBJECTIVE: To investigate the outcomes of resident-performed Nd:YAG laser posterior capsulotomy. DESIGN: Combined retrospective and prospective study. PARTICIPANTS: Patients (N = 301) who underwent Nd:YAG capsulotomy by ophthalmology residents at Rassoul Akram Hospital, Tehran, Iran. METHODS: Assessment of visual outcomes and complications and the results of second- and third-year residents. RESULTS: In the retrospective arm, 131 eyes of 129 patients were enrolled...
August 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28772955/characterization-of-a-laser-surface-treated-martensitic-stainless-steel
#15
S R Al-Sayed, A A Hussein, A A Nofal, S I Hassab Elnaby, H Elgazzar
Laser surface treatment was carried out on AISI 416 machinable martensitic stainless steel containing 0.225 wt.% sulfur. Nd:YAG laser with a 2.2-KW continuous wave was used. The aim was to compare the physical and chemical properties achieved by this type of selective surface treatment with those achieved by the conventional treatment. Laser power of different values (700 and 1000 W) with four corresponding different laser scanning speeds (0.5, 1, 2, and 3 m•min-1) was adopted to reach the optimum conditions for impact toughness, wear, and corrosion resistance for laser heat treated (LHT) samples...
May 29, 2017: Materials
https://www.readbyqxmd.com/read/28772884/enhanced-thermo-optical-switching-of-paraffin-wax-composite-spots-under-laser-heating
#16
Asmaa Said, Abeer Salah, Gamal Abdel Fattah
Thermo-optical switches are of particular significance in communications networks where increasingly high switching speeds are required. Phase change materials (PCMs), in particular those based on paraffin wax, provide wealth of exciting applications with unusual thermally-induced switching properties, only limited by paraffin's rather low thermal conductivity. In this paper, the use of different carbon fillers as thermal conductivity enhancers for paraffin has been investigated, and a novel structure based on spot of paraffin wax as a thermo-optic switch is presented...
May 12, 2017: Materials
https://www.readbyqxmd.com/read/28772625/an-efficient-violet-amplified-spontaneous-emission-ase-from-a-conjugated-polymer-pfo-co-px-in-solution
#17
Sara Abdulaziz Alfahd, Saradh Prasad Rajendra, Wafa Al-Mujammi, Durairaj Devaraj, Vadivel Masilamani, Mohamad Saleh AlSalhi
The optical of conjugated polymer poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(2,5-p-xylene)] also known as [(PFO-co-pX), ADS145UV], dissolved in a few solvents, has been measured. The absorption, emission spectra, and quantum yield have been investigated by using a spectrophotometer and spectrofluorometer, respectively. The properties of Amplified Spontaneous Emission (ASE) of conjugated PFO-co-pX polymer under different conditions such as solvent type, concentration, and pumping energy have been examined by using the tripled frequency of a Nd:YAG laser as a source of pumping...
March 7, 2017: Materials
https://www.readbyqxmd.com/read/28772383/investigation-on-the-mechanism-and-failure-mode-of-laser-transmission-spot-welding-using-pmma-material-for-the-automotive-industry
#18
Xiao Wang, Baoguang Liu, Wei Liu, Xuejiao Zhong, Yingjie Jiang, Huixia Liu
To satisfy the need of polymer connection in lightweight automobiles, a study on laser transmission spot welding using polymethyl methacrylate (PMMA) is conducted by using an Nd:YAG pulse laser. The influence of three variables, namely peak voltages, defocusing distances and the welding type (type I (pulse frequency and the duration is 25 Hz, 0.6 s) and type II (pulse frequency and the duration is 5 Hz, 3 s)) to the welding quality was investigated. The result showed that, in the case of the same peak voltages and defocusing distances, the number of bubbles for type I was obviously more than type II...
January 1, 2017: Materials
https://www.readbyqxmd.com/read/28765670/microleakage-in-class-v-composite-restorations-after-desensitizing-surface-treatment-with-er-yag-and-co2-lasers
#19
Hamid Reza Mozaffari, Alireza Ehteshami, Farshad Zallaghi, Nasim Chiniforush, Zohreh Moradi
Aims: Glutaraldehyde, CO2 and Er:YAG lasers can be used for treatment of dentin hypersensitivity. However, their application may have adverse effects on the clinical service of restorations. This study aimed to assess the microleakage in composite restorations following surface treatment with Glutaraldehyde desensitizer, CO2 and Er:YAG laser irradiation for treatment of dentin hypersensitivity. Materials and methods: This experimental study was conducted on 60 extracted sound human teeth. Class V cavities were prepared measuring 3×3 mm using a diamond bur...
December 30, 2016: Laser Therapy
https://www.readbyqxmd.com/read/28762194/selective-removal-of-carious-lesion-with-er-yag-laser-followed-by-dentin-biomodification-with-chitosan
#20
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
keyword
keyword
601
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"