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https://www.readbyqxmd.com/read/28741292/effect-of-mdp-based-silane-and-different-surface-conditioner-methods-on-bonding-of-resin-cements-to-zirconium-framework
#1
Hatice Özdemir, Nuran Yanikoğlu, Nurdan Sağsöz
PURPOSE: To determine the shear bond strength (SBS) between zirconium framework and resin cements after different surface conditioner methods and after application of 10-methacryloyloxydecyl dihydrogen phosphate (MDP) based silane and a bonding agent mix. MATERIALS AND METHODS: 128 disc-shaped zirconium-oxide specimens were prepared. Specimens were placed in autopolymerizing acrylic resin. The bonding surface of specimens was smoothed consecutively with 600-, 800-, and 1200-grit silicon carbide papers under water cooling...
July 24, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28726192/study-of-proliferative-activity-of-vaginal-epithelium-in-women-with-stress-urinary-incontinence-treated-by-er-yag-laser
#2
G A Lapii, A Yu Yakovleva, A I Neimark, E L Lushnikova
The expression of Ki-67 proliferation marker was studied in vaginal biopsy specimens from women with stress urinary incontinence treated using a Fotona nonablative erbium laser. Cells expressing Ki-67 were located in all cases in the parabasal and basal levels of stratified squamous epithelium, the index of labeled nuclei before Er:YAG laser exposure was 19.05±2.86%. After 1-2 months of laser therapy, the index of labeled nuclei in the epithelium increased significantly and reached 31.79±2.25%. These changes were interpreted as a result of epithelial-stromal interactions...
July 18, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28722334/potential-emerging-treatment-in-vitiligo-using-er-yag-in-combination-with-5fu-and-clobetasol
#3
Fatemeh Mokhtari, Anis Bostakian, Zabihollah Shahmoradi, Tohid Jafari-Koshki, Fariba Iraji, Gita Faghihi, Sayed Mohsen Hosseini, Behzad Bafandeh
BACKGROUND: Vitiligo is a pigmentary disorder of skin affecting at least 1% of the world population of all races in both sexes. Its importance is mainly due to subsequent social and psychological problems rather than clinical complications. Various treatment choices are available for vitiligo; however, laser-based courses have shown to give more acceptable results. OBJECTIVE: The aim of this trial was to evaluate the efficacy of Er:YAG laser as a supplementary medicine to topical 5FU and clobetasol in vitiligo patients...
July 19, 2017: Journal of Cosmetic Dermatology
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/28708251/efficacy-of-photon-initiated-photoacoustic-streaming-on-apically-extruded-debris-with-different-preparation-systems-in-curved-canals
#5
D Arslan, A Kustarci
AIM: To determine the effect of photon-initiated photoacoustic streaming (PIPS) on the extrusion of debris using multiple-file (ProTaper Next-PTN) and single-file (One Shape-OS) continuous rotary systems in curved canals in human molar teeth. METHODOLOGY: Sixty extracted maxillary first molar teeth with curved mesial roots, mature apices and of similar lengths were selected. Teeth with apical diameters larger than size 15 were discarded. The teeth were randomly divided into 4 experimental groups (n=15 teeth per group) according to the file used and irrigation systems: (1) OS with PIPS with a 2940 nm Er:YAG laser (0...
July 14, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28699676/influence-of-multi-wavelength-laser-irradiation-of-enamel-and-dentin-surfaces-at-0-355-2-94-and-9-4%C3%A2-%C3%AE-m-on-surface-morphology-permeability-and-acid-resistance
#6
Nai-Yuan N Chang, Jamison M Jew, Jacob C Simon, Kenneth H Chen, Robert C Lee, William A Fried, Jinny Cho, Cynthia L Darling, Daniel Fried
OBJECTIVE: Ultraviolet (UV) and infrared (IR) lasers can be used to specifically target protein, water, and mineral, respectively, in dental hard tissues to produce varying changes in surface morphology, permeability, reflectivity, and acid resistance. The purpose of this study was to explore the influence of laser irradiation and topical fluoride application on the surface morphology, permeability, reflectivity, and acid resistance of enamel and dentin to shed light on the mechanism of interaction and develop more effective treatments...
July 12, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28691887/effects-of-an-erbium-yttrium-aluminum-garnet-er-yag-laser-and-an-ultrasonic-scaler-on-tio2-coated-titanium-surfaces-contaminated-with-subgingival-plaque-an-in-vitro-study-to-assess-post-treatment-biocompatibility-to-osteogenic-cells
#7
Marco Giannelli, Daniele Bani, Alessia Tani, Fabrizio Materassi, Flaminia Chellini, Chiara Sassoli
BACKGROUND: We evaluated the effects of conventional ultrasonic scaler vs. Er-YAG laser on titanium surfaces contaminated with subgingival plaque from peri-implantitis patients in terms of: plaque and bio-corroded titanium oxide coating removal; surface change induction; residual biocompatibility towards osteoblasts. METHODS: Subgingival plaque-coated titanium discs with moderately rough surface were fixed with ethanol and treated with ultrasonic scaler (metal tip) or Er-YAG laser (20...
July 10, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28656929/effect-of-erbium-yttrium-aluminum-garnet-laser-on-bond-strength-of-a-total-etch-adhesive-system-to-caries-affected-dentin-on-gingival-wall
#8
F Cebe, M Bulbul, I Simsek, M A Cebe, B Ozturk
PURPOSE: To assess the effect of the erbium:yttrium aluminum garnet (Er:YAG) laser on bond strength of a total-etch adhesive system to the caries-affected dentin on the gingival wall. MATERIALS AND METHODS: Ten human molars with proximal carious lesions were randomly divided into two groups. In the first group, the carious dentin was removed with a bur, whereas in the second group it was removed with the Er:YAG laser. Carious lesions were excavated with one of these two techniques until laser fluorescence values decreased to 15 in the center of the lesions...
June 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28652898/effects-of-root-debridement-with-hand-curettes-and-er-yag-laser-on-chemical-properties-and-ultrastructure-of-periodontally-diseased-root-surfaces-using-spectroscopy-and-scanning-electron-microscopy
#9
Reza Amid, Gholam Ali Gholami, Masoud Mojahedi, Maryam Aghalou, Mohsen Gholami, Mahdieh Mirakhori
Introduction: The efficacy of erbium-doped yttrium aluminum garnet (Er:YAG) laser for root debridement in comparison with curettes has been the subject of many recent investigations. Considering the possibility of chemical and ultra-structural changes in root surfaces following laser irradiation, this study sought to assess the effects of scaling and root planing (SRP) with curettes and Er:YAG laser on chemical properties and ultrastructure of root surfaces using spectroscopy and scanning electron microscopy (SEM)...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/28646753/mechanical-properties-and-molecular-structure-analysis-of-subsurface-dentin-after-er-yag-laser-irradiation
#10
Zhengdi He, Lingling Chen, Xuejuan Hu, Yasushi Shimada, Masayuki Otsuki, Junji Tagami, Shuangchen Ruan
The purpose of this study was to evaluate the chemical and mechanical modifications in subsurface dentin layer after Er: YAG (Erbium-Yttrium Aluminium Garnet) laser irradiation, as the guidance of new dental restorative materials specific for laser irradiated dentin. MATERIALS AND METHODS: Dentin disks obtained from extracted human molars were prepared and exposed to a single pulse Er:YAG laser irradiation at 80mJ/pulse. After laser irradiation the mechanical and chemical characteristics of intertubular dentin in subsurface layer were studied using nanoindentation tester and micro-Raman spectromy (μ-RS)...
June 3, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28646390/2940-nm-er-yag-fractional-laser-enhanced-the-effect-of-topical-drug-for-psoriasis
#11
Ruilian Li, Jun Zhou, Hui Su, Mei Wang, Yongxian Wang, Shengxiang Xiao, Huiqun Ma
We observed the promoting effects of the 2940-nm erbium:YAG (Er:YAG) fractional laser in topical drug delivery for psoriasis. A total of five (four males and one female) recalcitrant psoriasis patients were given laser treatment eight times at 1-week intervals with the following parameters: 5-11% spot density and 100-μm energy depth. The psoriatic skin lesions on the left knee and the corresponding lesions at the right ones of each psoriasis patient were randomly divided into two groups: laser + topical drug group (L) and drug alone group (D)...
June 23, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28641206/efficacy-of-surgical-laser-therapy-in-the-management-of-oral-pigmented-lesions-a-systematic-review
#12
Tariq Abduljabbar, Fahim Vohra, Zohaib Akram, Siti Mariam Ab Ghani, Nawwaf Al-Hamoudi, Fawad Javed
BACKGROUND: Oral pigmentation, especially in the gingiva poses esthetic problems. Laser therapy has been widely used for cosmetic therapy in dentistry. The aim of the present study was to systematically review the efficacy of surgical laser therapy (SLT) in the management of oral pigmented lesions (OPL). MATERIALS AND METHODS: The addressed focused question was "Is SLT effective in the management of OPL?" Databases (MEDLINE via PubMed; EMBASE; Cochrane Central Register of Controlled Trials and Cochrane Oral Health Group Trials Register databases) were searched from 1970 up to and including February 2017...
June 15, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28624755/stereo-vision-based-tracking-of-soft-tissue-motion-with-application-to-online-ablation-control-in-laser-microsurgery
#13
Andreas Schoob, Dennis Kundrat, Lüder A Kahrs, Tobias Ortmaier
Recent research has revealed that image-based methods can enhance accuracy and safety in laser microsurgery. In this study, non-rigid tracking using surgical stereo imaging and its application to laser ablation is discussed. A recently developed motion estimation framework based on piecewise affine deformation modeling is extended by a mesh refinement step and considering texture information. This compensates for tracking inaccuracies potentially caused by inconsistent feature matches or drift. To facilitate online application of the method, computational load is reduced by concurrent processing and affine-invariant fusion of tracking and refinement results...
June 8, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28622484/bactericidal-effect-of-er-yag-laser-activated-sodium-hypochlorite-irrigation-against-biofilms-of-enterococcus-faecalis-isolate-from-canal-of-root-filled-teeth-with-periapical-lesions
#14
Xiaogang Cheng, Doudou Xiang, Wenxi He, Jun Qiu, Bing Han, Qing Yu, Yu Tian
OBJECTIVE: This study was to evaluate the bactericidal effect of Er:YAG laser-activated sodium hypochlorite irrigation (Er:YAG + NaOCl) on biofilms of Enterococcus faecalis clinical isolate. BACKGROUND DATA: It was reported that Er:YAG + NaOCl had effective bactericidal effect on laboratory-adapted E. faecalis strain, while no study has reported its effect on the clinical isolate. METHODS: Eighteen E. faecalis strains were isolated from 39 root-filled teeth with periapical lesions, and their biofilm formation abilities were evaluated using the crystal violet staining method...
July 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28621453/the-pinhole-method-using-an-erbium-yag-laser-for-the-treatment-of-papular-acne-scars
#15
Sang Ju Lee, Jae Min Kim, Young Koo Kim, Seong Jun Seo, Kui Young Park
Papular acne scars are skin-colored or hypopigmented, soft and elevated lesions of the chin and trunk. Papular scars are one of the most difficult acne scars to treat. Herein, we reported two patients with papular acne scars on the chin that were successfully treated by the pinhole method using an Erbium (ER):YAG laser. Good cosmetic results were achieved in both patients. The side effects included mild, intra-, and post-procedural pain and erythema that resolved spontaneously within 2 weeks. The pinhole method with an Er:YAG laser could potentially be used as a safe and effective treatment for papular acne scars...
June 16, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/28590838/comparative-evaluation-of-effects-of-laser-modalities-on-shear-bond-strengths-of-veneering-porcelains-to-laser-sintered-substructures-an-in-vitro-study
#16
Oguzhan Gorler, Aysegul Goze Saygin
OBJECTIVE: Laser modalities and direct metal laser sintering (DMLS) have a potential to enhance micromechanical bonding between dental super- and infrastructures. However, the effect of different manufacturing methods on the metal-ceramic bond strength needs further evaluation. We investigated the effect of surface treatment with Er:YAG, Nd:YAG, and Ho:YAG lasers on the shear bond strength (SBS) of high-fusion dental porcelains (Vita and G-Ceram) to infrastructures prepared with DMLS in vitro settings...
June 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28551764/autofluorescence-spectroscopy-for-nerve-sparing-laser-surgery-of-the-head-and-neck-the-influence-of-laser-tissue-interaction
#17
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/28515467/thermal-radiation-of-er-doped-dielectric-crystals-probing-the-range-of-applicability-of-the-kirchhoff-s-law
#18
Ekembu K Tanyi, Brandi T Burton, Evgenii E Narimanov, M A Noginov
Kirchhoff's law of thermal radiation, relating emissivity and absorptance is commonly formulated for opaque bodies in thermodynamic equilibrium with the environment. However, in many systems of practical importance, both assumptions are often not satisfied. We revisit the century-old law and examine the limits of its applicability in an example of Er:YAG and Er:YLF dielectric crystals-potential radiation converters for thermophotovoltaic applications. The (80 at.%) Er:YAG crystal is opaque between 1.45 μm and 1...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28513512/effects-of-laser-etching-on-shear-bond-strengths-of-brackets-bonded-to-fluorosed-enamel
#19
R Nalcaci, B Temel, S Çokakoğlu, H Türkkahraman, S Üsümez
AIM: To evaluate the effects of laser etching on the shear bond strengths (SBS) and failure modes of brackets bonded to fluorosed enamel. MATERIALS AND METHODS: This in vitro study included 34 fluorosed and 34 nonfluorosed teeth. Teeth were divided into four subgroups according to the etching procedure: Group (A) normal enamel etched with 37% phosphoric acid for 15 s, Group (B) nonfluorosed enamel etched with erbium:yttrium aluminum garnet (Er: YAG) laser for 15 s, Group (C) fluorosed enamel etched with 37% phosphoric acid for 30 s, Group (D) fluorosed enamel etched with Er: YAG laser for 30 s...
May 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28497661/medication-related-osteonecrosis-of-the-jaw-risk-factors-in-patients-under-biphosphonate-versus-patients-under-antiresorptive-antiangiogenic-drugs
#20
Giulia Ghidini, Maddalena Manfredi, Ilaria Giovannacci, Giovanni Mergoni, Amin Sarraj, Maura Mureddu, Giovanna Giunta, Mauro Bonanini, Marco Meleti, Paolo Vescovi
BACKGROUND: Biphosphonate-Related Osteonecrosis of the Jaw (BRONJ) is a potential side effect associated with the administration of bisphosphonates; the aim of this work is to highlight the possible epidemiological differences between two groups of patients affected by MRONJ treated at the Center of Oral Medicine, Pathology and Laser Surgery of the Academic Hospital at the University of Parma, Italy, between January 2004 and June 2016. METHODS: Medical charts of 303 patients (214 Females and 89 Males, mean age 67y) treated at the Center of Oral Medicine, Pathology and Laser Surgery of the Academic Hospital at the University of Parma, between January 2004 and June 2016, were retrospectively analyzed...
May 10, 2017: Minerva Stomatologica
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