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Er:yag

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https://www.readbyqxmd.com/read/27893513/schneiderian-membrane-perforation-rate-and-increase-in-bone-temperature-during-maxillary-sinus-floor-elevation-by-means-of-er-yag-laser-an-animal-study-in-pigs
#1
Jacek Matys, Jakub Hadzik, Marzena Dominiak
PURPOSE: To assess the time of preparation, bone temperature increase, and the Schneiderian membrane perforation rate during maxillary sinus floor elevation. MATERIALS AND METHODS: The research included 30 maxillary sinuses (n = 30) of a pig, divided into 2 groups (n = 15). The lateral bony windows were created using Er:YAG laser (200 mJ, 15 Hz, energy density: 25.48 J/cm) and a diamond bur (control). The membrane was elevated using laser (50 mJ, 50 Hz) and hand instruments...
November 23, 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27885522/efficacy-and-safety-of-fractional-co2-laser-versus-fractional-er-yag-laser-in-the-treatment-of-facial-skin-wrinkles
#2
Reza M Robati, Elmira Asadi
Ablative fractional lasers were introduced for treating facial rhytides. Few studies have compared fractional CO2 and Er:YAG lasers on cutaneous photodamages by a split trial. The aim of the present study was to compare these modalities in a randomized controlled double-blind split-face design with multiple sessions and larger sample size compared to previous studies done before. Forty patients with facial wrinkles were enrolled. Patients were randomly assigned to receive three monthly treatments on each side of the face, one with a fractional CO2 and one with a fractional Er:YAG laser...
November 24, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27849400/erbium-yttrium-aluminium-garnet-laser-versus-q-switched-neodymium-yttrium-aluminium-garnet-laser-for-the-treatment-of-xanthelesma-palpebrarum
#3
Ali Balevi, Pelin Ustuner, Mustafa Ozdemir
BACKGROUND: Several lasers have been used for the treatment of xanthelasma palpebrarum (XP), such as Q-switched Neodymium:Yttrium Aluminium Garnet (QSNd:YAG), Erbium:Yttrium Aluminium Garnet (Er:YAG) laser. However, there is no comparemental study among these laser options in the treatment of XP. OBJECTIVE: The aim of this study was to compare the clinical efficacy and response rates of QSNd:YAG and Er:YAG in the treatment of XP. METHODS: Sixty patients with a total of 102 XP lesions were randomly and equally divided into two groups...
November 16, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27830151/the-effect-of-energy-densities-on-the-shear-bond-strength-of-self-adhering-flowable-composite-to-er-yag-pretreated-dentin
#4
Paul Nahas, Toni Zeinoun, Zeina Majzoub, Karim Corbani, Samir Nammour
Objective. To investigate the shear bond strength of self-adhering flowable resin composite, to dentin, after exposing it to Er:YAG laser radiation, at different energy densities. Materials and Methods. Sixty freshly extracted human third molars were randomly divided into five groups (n = 12). In the control group, dentin was left unirradiated, whereas, in the other four groups, dentin was irradiated with Er:YAG laser in noncontact mode (MSP mode = 100 µs; 10 Hz; beam diameter: 1.3 mm; speed of 1 mm/second; air 6 mL/min; and water 4 mL/min), and respectively, with the following level of energy (50 mJ, 60 mJ, 80 mJ, and 100 mJ)...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27818244/the-effect-of-pulse-duration-power-and-energy-of-fractional-er-yag-laser-for-transdermal-delivery-of-differently-sized-fitc-dextrans
#5
Barbara Zorec, Dejan Škrabelj, Marko Marinček, Damijan Miklavčič, Nataša Pavšelj
We studied fractional Er:YAG laser to enhance transdermal drug delivery of compounds possessing different molecular weights: FITC-dextrans (or FD) with average molecular weights of 4, 10 and 20kDa. Vertical glass Franz diffusion cells were used to study molecular transport through dermatomed porcine skin and histological analysis of laser-treated skin was performed after treatment with different laser pulse protocols. We were comparing different pulse durations at constant or varying pulse energies. We found that the energy of the delivered pulses mostly dictates the size/depth of laser-created microchannels, while the duration of the pulses dictates the extent of thermally altered tissue...
November 3, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27805662/dual-comb-spectroscopy-for-rapid-characterization-of-complex-optical-properties-of-solids
#6
Akifumi Asahara, Akiko Nishiyama, Satoru Yoshida, Ken-Ichi Kondo, Yoshiaki Nakajima, Kaoru Minoshima
We demonstrate rapid characterization of complex optical properties of solids via dual-comb spectroscopy (DCS) in the near-infrared region. The fine spectral structures in the complex refractive index of an Er:YAG are successfully deduced using the developed system and Fourier analysis. Moreover, simultaneous determination of the refractive index and the thickness is demonstrated for a silicon semiconductor wafer through the use of multireflected echo signals. The results indicate the potential of DCS as a powerful measurement tool for the rapid and full characterization of solid materials...
November 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27805273/comparison-between-er-yag-laser-and-bipolar-radiofrequency-combined-with-infrared-diode-laser-for-the-treatment-of-acne-scars-differential-expression-of-fibrogenetic-biomolecules-may-be-associated-with-differences-in-efficacy-between-ablative-and-non-ablative
#7
Seonguk Min, Seon Yong Park, Jungyoon Moon, Hyuck Hoon Kwon, Ji Young Yoon, Dae Hun Suh
BACKGROUND AND OBJECTIVE: Fractional Er:YAG minimizes the risk associated with skin ablation. Infrared diode laser and radiofrequency have suggested comparable improvements in acne scar. We compared the clinical efficacy of Er:YAG laser and bipolar radiofrequency combined with diode laser (BRDL) for the treatment of acne scars. Moreover, acute molecular changes of cytokine profile associated with wound healing have been evaluated to suggest mechanisms of improvement of acne scar. STUDY DESIGN: Twenty-four subjects with mild-to-moderate acne scars were treated in a split-face manner with Er:YAG and BRDL, with two treatment sessions, 4 weeks apart...
November 2, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27796132/carbon-dioxide-laser-versus-erbium-yag-laser-in-treatment-of-epidermal-verrucous-nevus-a-comparative-randomized-clinical-study
#8
Mai Abdel Raouf Osman, Ahmed Nazmi Kassab
Background A verrucous epidermal nevus (VEN) is a skin disorder that has been treated using different treatment modalities with varying results. Ablative lasers such as Carbon dioxide laser (CO2) and erbium:yttrium-aluminum-garnet (Er:YAG) laser have been considered as the gold standard for treatment of epidermal naevi. Objective To evaluate and compare the efficacy, postoperative wound healing and side effects of pulsed CO2 laser and Er:YAG laser for the treatment of verrucous epidermal nevi. Materials and methods Twenty patients with localized VEN were randomly divided into two groups...
October 31, 2016: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/27778355/skin-pre-ablation-and-laser-assisted-microjet-injection-for-deep-tissue-penetration
#9
Hun-Jae Jang, Seonggu Yeo, Jack J Yoh
BACKGROUND AND AIMS: For conventional needless injection, there still remain many unresolved issues such as the potential for cross-contamination, poor reliability of targeted delivery dose, and significantly painstaking procedures. As an alternative, the use of microjets generated with Er:YAG laser for delivering small doses with controlled penetration depths has been reported. In this study, a new system with two stages is evaluated for effective transdermal drug delivery. First, the skin is pre-ablated to eliminate the hard outer layer and second, laser-driven microjet penetrates the relatively weaker and freshly exposed epidermis...
October 25, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27778116/the-effectiveness-of-the-erbium-yttrium-aluminum-garnet-pips-technique-in-comparison-to-different-chemical-solutions-in-removing-the-endodontic-smear-layer-an-in-vitro-profilometric-study
#10
Riman Nasher, Rene Franzen, Norbert Gutknecht
This study evaluated the degree of endodontic smear layer removal using the Er:YAG PIPS technique (2.94 μm) in comparison with different irrigants. Sixty-four single-rooted teeth were endodontically prepared up to size #40 and were divided into 8 groups (a-h) (n = 8). Groups a, b, c, and d were irrigated with (3 % NaOCl + 20 % EDTA), (0.9 % NaCl), (3 % NaOCl), and (20 % EDTA), respectively. Groups e, f, g, and h were treated with (3 % NaOCl + 20 % EDTA + PIPS), (0.9 % NaCl + PIPS), (3 % NaOCl + PIPS), and (20 % EDTA + PIPS), respectively...
December 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27760008/in-vitro-study-of-temperature-changes-in-pulp-chamber-during-root-planing-procedure-using-er-yag-laser
#11
Blagovesta K Yaneva, Plamen I Zagorchev, Elena I Firkova, Ivan T Glavinkov
AIM: To assess temperature changes at specified time intervals during Er:YAG laser scaling and root planing of surfaces with dental calculus. MATERIALS AND METHODS: Fifteen single-rooted teeth with advanced periodontal disease were extracted and fixed in a cylinder thermostat filled with distilled water at constant temperature (35.5°C). A specially designed thermal probe (type K thermocouple) accurate to ±0.1°C over the range from 20°C to 80°C was fitted into the pulp chamber of tooth sample...
September 1, 2016: Folia Medica
https://www.readbyqxmd.com/read/27747644/efficacy-of-alternative-or-adjunctive-measures-to-conventional-treatment-of-peri-implant-mucositis-and-peri-implantitis-a-systematic-review-and-meta-analysis
#12
Frank Schwarz, Andrea Schmucker, Jürgen Becker
In patients with peri-implant mucositis and peri-implantitis, what is the efficacy of nonsurgical (i.e. referring to peri-implant mucositis and peri-implantitis) and surgical (i.e. referring to peri-implantitis) treatments with alternative or adjunctive measures on changing signs of inflammation compared with conventional nonsurgical (i.e. mechanical/ultrasonic debridement) and surgical (i.e. open flap debridement) treatments alone? After electronic database and hand search, a total of 40 publications (reporting on 32 studies) were finally considered for the qualitative and quantitative assessment...
December 2015: Int J Implant Dent
https://www.readbyqxmd.com/read/27726169/selective-photoantisepsis
#13
David M Harris, Lou Reinisch
BACKGROUND AND OBJECTIVE: Selective killing of pathogens by laser is possible due to the difference in absorption of photon energy by pathogens and host tissues. The optical properties of pathogenic microorganisms are used along with the known optical properties of soft tissues in calculations of the laser-induced thermal response of pathogen colonies embedded in a tissue model. The objective is to define the laser parameters that optimize pathogen destruction and depth of the bactericidal effect...
October 10, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27722059/microindentation-hardness-and-calcium-phosphorus-ratio-of-dentin-following-excavation-of-dental-caries-lesions-with-different-techniques
#14
Gunseli Katirci, R Banu Ermis
BACKGROUND: The aim of this in vitro study was to evaluate the microindentation hardness and chemical composition of residual dentin left at the cavity bottom following removal of carious dentin using the Carisolv chemomechanical and Er:YAG laser caries excavation methods in comparison with the conventional tungsten-carbide bur excavation. METHODS: Sixty-nine extracted permanent teeth with occlusal dentin caries were assigned into three groups according to caries removal technique...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27703606/in-vitro-histological-evaluation-of-the-surgical-margins-made-by-different-laser-wavelengths-in-tongue-tissues
#15
Ana-Salvaterra Azevedo, Luís-Silva Monteiro, Fernando Ferreira, Maria-Leonor Delgado, Fernanda Garcês, Sofia Carreira, Marco Martins, Juan Suarez-Quintanilla
BACKGROUND: Lasers have become standard tools for the surgical treatment of oral lesions. The purpose of this study is to determine the surgical margins and histologically evaluate the tissue thermal effects induced by different types of surgical instruments. MATERIAL AND METHODS: Cuts were made in pork tongues' mucosa with different lasers (Er:YAG at 2W with and without air / water spray and at 4W with and without air / water spray; CO2 at 3.5W and 7W in pulsed mode and at 7W in continuous mode; the diode laser at 3...
October 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27690747/use-of-er-yag-for-the-treatment-of-recalcitrant-facial-verruca-plana
#16
Ali Balevi, Pelin Üstüner, Mustafa Özdemir
BACKGROUND: Recalcitrant facial verruca plana (FVP) may persist for years and full remission is not always achieved with conventional therapies. The clinical success rates reported for different lasers are highly variable and only one study evaluated the Er:YAG laser for the treatment of FVP. OBJECTIVE: To determine whether Er:YAG is safe and effective for the treatment of recalcitrant FVP. METHODS: Forty-six patients with recalcitrant FVP were treated by Er:YAG at four-week intervals...
October 3, 2016: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/27666123/lasers-for-caries-removal-in-deciduous-and-permanent-teeth
#17
Alessandro Montedori, Iosief Abraha, Massimiliano Orso, Potito Giuseppe D'Errico, Stefano Pagano, Guido Lombardo
BACKGROUND: Despite considerable improvements in oral health, dental caries continue to be a public health issue. The most frequently used, and universally accepted technique, to remove caries is through mechanical ablation of decayed tissues by means of rotating drills (diamond or tungsten carbide, or both). In the past few decades, the introduction of adhesive filling materials (resin composites) has affected cavity filling procedures by reducing its retention needs, with advantages for dental tissue conservation...
September 26, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27628384/compact-cavity-dumped-q-switched-er-yag-laser
#18
Lachlan Harris, Myles Clark, Peter Veitch, David Ottaway
We report a compact cavity-dumped Q-switched Er:YAG laser that produces pulses with 4.5 ns full width at half-maximum duration and 10 mJ energy. To the best of our knowledge, the resulting 2 MW peak power is the highest reported to date from a 1645 nm Er:YAG laser.
September 15, 2016: Optics Letters
https://www.readbyqxmd.com/read/27598444/fractional-laser-assisted-topical-imiquimod-5-cream-treatment-for-recalcitrant-common-warts-in-children-a-pilot-study
#19
Sung-Min Park, Gun-Wook Kim, Je-Ho Mun, Margaret Song, Hoon-Soo Kim, Byung-Soo Kim, Moon-Bum Kim, Hyun-Chang Ko
BACKGROUND: Conventional treatments for warts like cryotherapy are limited by the pain during procedures, especially in pediatric patients. Imiquimod is a topical immune response modifier, but the thick stratum corneum of common warts prevents drug permeation through skin. OBJECTIVE: To evaluate the efficacy and safety of fractional laser/topical 5% imiquimod cream for the treatment of warts in children. METHODS: Eleven pediatric patients with multiple recalcitrant common warts were included...
September 2, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/27598303/fracture-resistance-of-endodontically-retreated-roots-after-retreatment-using-self-adjusting-file-passive-ultrasonic-irrigation-photon-induced-photoacoustic-streaming-or-laser
#20
Aliye Kamalak, Ismail Uzun, Hakan Arslan, Ali Keleş, Ezgi Doğanay, Cangül Keskin, Merve Akçay
OBJECTIVE: Additional cleaning techniques and devices are required to remove maximum amount of residual filling material, which might limit disinfection of root canal system during retreatment. This study aimed to compare fracture resistance of roots when self-adjusting file (SAF), photon-induced photoacoustic streaming (PIPS), passive ultrasonic irrigation (PUI), erbium-doped yttrium aluminum garnet (Er:YAG), or neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers are applied following the use of retreatment files in endodontics...
October 2016: Photomedicine and Laser Surgery
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