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https://www.readbyqxmd.com/read/29785759/effect-of-2-94-%C3%A2%C2%B5m-er-yag-laser-on-the-chemical-composition-of-hard-tissues
#1
Abtesam Aljdaimi, Hugh Devlin, Mark Dickinson, Abdullatif Alfutimie
The aim was to investigate the effect of the Er-YAG laser radiation on morphology and chemical composition of enamel, dentin, and bone. The specimens of the three groups were irradiated with a very long pulse mode (VLP) of 2.94 µm Er-YAG laser with 100 mJ pulse energy and energy density of 8.42 J/ cm2 for 30 s, at a repetition rate of 15 Hz. The organic and inorganic content of the samples were investigated by Fourier Transforms Infrared spectroscopy (FTIR). The morphological characteristics were investigated with scanning electron microscopy (SEM) and elemental analysis (calcium and phosphorus) with energy-dispersive X-ray spectroscopy (EDX)...
May 21, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29766330/laser-reduction-of-specific-microorganisms-in-the-periodontal-pocket-using-er-yag-and-nd-yag-lasers-a-randomized-controlled-clinical-study
#2
K Grzech-Leśniak, A Sculean, Boris Gašpirc
The objective of this study was to evaluate the microbiological and clinical outcomes following nonsurgical treatment by either scaling and root planing, combination of Nd:YAG and Er:YAG lasers, or by Er:YAG laser treatment alone. The study involved 60 patients with generalized chronic periodontitis, randomly assigned into one of three treatment groups of 20 patients. The first group received scaling and root planing by hand instruments (SRP group), the second group received Er:YAG laser treatment alone (Er group), and the third group received combined treatment with Nd:YAG and Er:YAG lasers (NdErNd group)...
May 15, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29757041/successful-treatment-of-acne-keloidalis-nuchae-with-erbium-yag-laser-a-comparative-study
#3
Hend D Gamil, Elsayed M Khater, Fathia M Khattab, Mona A Khalil
BACKGROUND: Acne keloidalis nuchae (AKN) is a chronic inflammatory disease involving hair follicles of the neck. It is a form of keloidal scarring alopecia that is often refractory to medical or surgical management. OBJECTIVE: To evaluate the efficacy of Er:YAG laser in the treatment of AKN as compared to long pulsed Nd:YAG laser. PATIENTS AND METHODS: This study was conducted on 30 male patients with AKN. Their ages ranged from 19 to 47 years with a mean age of 36...
May 14, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29746426/a-comparison-study-of-the-nonablative-fractional-1565-nm-er-glass-and-the-picosecond-fractional-1064-532-nm-nd-yag-lasers-in-the-treatment-of-striae-alba-a-split-body-double-blinded-trial
#4
Lisa A Zaleski-Larsen, Isabela T Jones, Isabella Guiha, Douglas C Wu, Mitchel P Goldman
BACKGROUND: Few effective treatments exist for striae alba, which are the mature stage of stretch marks. OBJECTIVE: To evaluate the efficacy of the nonablative fractional 1,565-nm Er:glass and the picosecond fractional 1,064/532-nm Nd:YAG lasers in the treatment of striae alba. MATERIALS AND METHODS: Twenty subjects with striae alba on the bilateral abdomen were treated with either the nonablative fractional 1565-nm Er:glass or the picosecond fractional 1,064/532-nm Nd:YAG laser, with a total of 3 treatments 3 weeks apart...
May 9, 2018: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29742567/erbium-yttrium-aluminum-garnet-laser-versus-traditional-bur-in-the-extraction-of-impacted-mandibular-third-molars-analysis-of-intra-and-postoperative-differences
#5
Ilaria Giovannacci, Giovanna Giunta, Giuseppe Pedrazzi, Marco Meleti, Maddalena Manfredi, Mario Migliario, Matteo Brucoli, Alberta Greco Lucchina, Carmen Mortellaro, Paolo Vescovi
INTRODUCTION: Different osteotomy techniques have been proposed in order to improve postoperative course of impacted third molar extraction. The aim is to evaluate the possible advantages achieved with erbium yttrium-aluminum-garnet (Er:YAG) laser osteotomy compared with traditional burs. MATERIALS AND METHODS: Seventy-six extractions were randomly classified into 2 groups according to osteotomy instrument: group 1 (G1)-Er:YAG laser: 35 patients; group 2 (G2)-traditional bur: 41 patients...
May 8, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29742259/non-contact-profilometry-of-eroded-and-abraded-enamel-irradiated-with-an-er-yag-laser
#6
Renata Siqueira Scatolin, Vivian Colucci, Taísa Penazzo Lepri, Adílis Kalina de Alexandria, Lucianne Cople Maia, Rodrigo Galo, Maria Cristina Borsatto, Silmara Aparecida Milori Corona
Literature has reported positive results regarding the use of lasers in the control of erosive lesions; however, evaluating whether they are effective in the control of the progression of erosive/abrasive lesions is important. Objectives This study aimed to evaluate the effect of the Er:YAG laser irradiation in controlling the progression of erosion associated with abrasive lesions in enamel. Material and methods Bovine incisors were sectioned, flattened and polished. Forty-eight enamel slabs were subjected to treatment in an intraoral phase...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29737583/changes-in-deciduous-and-permanent-dentinal-tubules-diameter-after-several-conditioning-protocols-in-vitro-study
#7
María de Los Angeles Moyaho-Bernal, Rosalía Contreras-Bulnes, Laura Emma Rodríguez-Vilchis, Efraín Rubio-Rosas
Innovators conditioning protocols are emerged in permanent dentin, however for deciduous dentin the information is limited; the aim of this study was to evaluate in vitro diameter of deciduous and permanent dentinal tubules after several conditioning protocols. Eighty dentin samples were distributed in sixteen groups (n = 5 p/g) and dentin surface was conditioned as follow: G1D/G1P acid etching; G2D/G2P, self-etch adhesive; G3D/G3P, G4D/G4P, Er: YAG laser irradiation at 200 mJ-25.5 J/cm2 and 300 mJ-38.2 J/cm2 , at 10 Hz under water spray respectively; G5D/G5P, G6D/G6P, G7D/G7P, and G8D/G8P were irradiated under the same energy densities followed phosphoric acid or self-etch adhesive conditioning...
May 8, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29737215/needle-free-cutaneous-delivery-of-living-human-cells-by-er-yag-fractional-laser-ablation
#8
Jing Yu, Sachin Dubey, Yogeshvar N Kalia
BACKGROUND: Dermatological diseases, including most skin cancers and rare genetic conditions frequently originate in the epidermis. Targeted, topical cell-based therapy is a promising therapeutic strategy. Here, we present the first report demonstrating that fractional laser ablation enables local "needle-free" intraepidermal delivery of living human cells. METHODS: The cells penetrated porcine ear skin via microchannels created by Er:YAG fractional laser ablation; cell delivery was quantified using a haemocytometer...
May 8, 2018: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/29733110/parameters-in-fractional-laser-assisted-delivery-of-topical-anesthetics-role-of-laser-type-and-laser-settings
#9
Arne A Meesters, Marilin J Nieboer, Sanja Kezic, Menno A de Rie, Albert Wolkerstorfer
BACKGROUND AND OBJECTIVES: Efficacy of topical anesthetics can be enhanced by pretreatment of the skin with ablative fractional lasers. However, little is known about the role of parameters such as laser modality and laser density settings in this technique. Aims of this study were to compare the efficacy of pretreatment with two different ablative fractional laser modalities, a CO2 laser and an Er:YAG laser, and to assess the role of laser density in ablative fractional laser assisted topical anesthesia...
May 7, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29732016/effect-of-surface-preparation-with-nd-yag-and-er-cr-ysgg-lasers-on-the-repair-bond-strength-of-lithium-disilicate-glass-ceramic-to-a-silorane-based-composite-resin
#10
Mohammad Esmaeel Ebrahimi Chaharom, Fatemeh Pournaghi Azar, Narmin Mohammadi, Rezvan Nasiri
Background. This study was undertaken to evaluate the repair bond strength of lithium disilicate glass ceramic to a silorane-based composite resin after surface preparation with Nd:YAG and Er,Cr:YSGG lasers. Methods. A total of 102 lithium disilicate glass ceramic samples (IPS e.max Press), measuring 5 mm in diameter and 4 mm in thickness, were randomly assigned to 6 groups (n=17): group 1, no surface preparation (control); group 2, acid etching with 9.5% hydrofluoric acid (HF); group 3, surface preparation with 4...
2018: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/29731588/resurfacing-of-facial-acne-scars-with-a-new-variable-pulsed-er-yag-laser-in-fitzpatrick-skin-types-iv-and-v
#11
Namitha Chathra, Venkataram Mysore
Introduction: The Er:YAG laser, considered to be less effective than CO2 laser in its traditional form, in its new modulated version has variable pulse technology that is claimed to be superior to the earlier versions of the laser. Aim: The aim of the study was to check efficacy and safety of the new variable square pulse (VSP) Er:YAG laser in the management of acne scar in patients with Fitzpatrick skin types IV and V. Materials and Methods: This retrospective study consisted of 80 patients (Fitzpatrick skin types IV and V) with atrophic and hypertrophic facial acne scars...
January 2018: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/29731585/xanthelasma-an-update-on-treatment-modalities
#12
REVIEW
Zainab Laftah, Firas Al-Niaimi
Xanthelasmas are localized accumulation of lipid deposits on the eyelids. Lesions are typically asymptomatic and treatment is often sought for cosmetic purposes. Unfortunately, there is paucity of strong evidence in the literature for the effective treatment of normolipidemic xanthelasmas. A literature search using the term "xanthelasma" was carried out in PubMed and Medline databases. Only articles related to treatment were considered and analyzed for their data. Commonly cited treatments include topical trichloroacetic acid, liquid nitrogen cryotherapy, and various lasers including carbon dioxide, Er:YAG, Q-switched Nd:YAG, and pulse dye laser...
January 2018: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/29718376/assessment-of-ablative-fractional-co2-laser-and-er-yag-laser-to-treat-hypertrophic-scars-in-a-red-duroc-pig-model
#13
Luis Rodriguez-Menocal, Stephen S Davis, Sandra Becerra, Marcela Salgado, Joel Gill, Jose Valdes, Ambar Candanedo, Shanmugasundaram Natesan, Michael Solis, Wellington Guzman, Alex Higa, Carl I Schulman, Robert J Christy, Jill Waibel, Evangelos V Badiavas
Hypertrophic scarring is a fibroproliferative process that occurs following a third-degree dermal burn injury, producing significant morbidity due to persistent pain, itching, cosmetic disfigurement, and loss of function due to contractures. Ablative fractional lasers have emerged clinically as a fundamental or standard therapeutic modality for hypertrophic burn scars. Yet the examination of their histopathological and biochemical mechanisms of tissue remodeling and comparison among different laser types has been lacking...
April 28, 2018: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/29717903/bactericidal-effect-of-various-laser-irradiation-systems-on-enterococcus-faecalis-biofilms-in-dentinal-tubules-a-confocal-laser-scanning-microscopy-study
#14
Xiaoli Wang, Xiaogang Cheng, Xin Liu, Zhihua Wang, Juan Wang, Cuihong Guo, Yaqing Zhang, Wenxi He
OBJECTIVE: The aim of this study was to compare the bactericidal effect of various laser irradiation systems on Enterococcus faecalis biofilms in dentinal tubules by using a novel dentin infection model and confocal laser scanning microscopy (CLSM). BACKGROUND DATA: Laser-activated irrigations have been proposed as an adjuvant to conventional protocols of root canal treatment to enhance the smear layer removal, which is a promising protocol for root canal disinfection...
May 2, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29703665/does-the-instrument-used-for-the-implant-site-preparation-influence-the-bone-implant-interface-a-systematic-review-of-clinical-and-animal-studies
#15
REVIEW
P H W Tretto, V Fabris, G O Cericato, R Sarkis-Onofre, A Bacchi
This systematic review evaluates the influence of the instrument used for the implant site preparation on the bone-implant interface. Any type of clinical or animal study were searched for in MEDLINE/PubMed, ISI Web of Science, and SciVerse Scopus. Two independent reviewers screened titles/abstracts of articles and the full-text of potentially eligible studies. Comparisons of bone to implant contact and crestal bone loss were estimated using pairwise meta-analysis. Twenty-nine studies met the inclusion criteria...
April 24, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29700662/is-the-fractional-laser-still-effective-in-assisting-cutaneous-macromolecule-delivery-in-barrier-deficient-skin-psoriasis-and-atopic-dermatitis-as-the-disease-models
#16
Woan-Ruoh Lee, Shing-Chuan Shen, Calvin T Sung, Pei-Ying Liu, Jia-You Fang
PURPOSE: Most of the investigations into laser-assisted skin permeation have used the intact skin as the permeation barrier. Whether the laser is effective in improving cutaneous delivery via barrier-defective skin is still unclear. METHODS: In this study, ablative (Er:YAG) and non-ablative (Er:glass) lasers were examined for the penetration of peptide and siRNA upon topical application on in vitro skin with a healthy or disrupted barrier. RESULTS: An enhanced peptide flux (6...
April 26, 2018: Pharmaceutical Research
https://www.readbyqxmd.com/read/29696445/resistance-to-vertical-root-fracture-of-apicoected-teeth-using-different-devices-during-two-root-canal-irrigation-procedures
#17
Ferhat Ayrancı, Leyla Benan Ayrancı, Alper Özdoğan, Serkan Özkan, Mutlunur Önder Peker, Mutan Hamdi Aras
The aim of the present work was to measure the fracture resistance of endodontically treated teeth that were apicoected with different procedures. Seventy-two extracted human maxillary anterior teeth were included in this study. The specimens were randomly assigned to three main groups according to the apical surgery procedures and then two subgroups according to the irrigation protocols during root canal treatment and total of six groups were obtained (n = 12). Group 1: served as a control and apical surgery process was not performed in this group...
April 26, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29691557/-clinical-observation-on-different-kinds-of-laser-on-60-molars-with-abrasion
#18
Hai-Yan Sun, Li-Hong Qiu, Di Yang
PURPOSE: To evaluate the clinical effect of different kinds of laser on 60 molars with abrasion. METHODS: Thirty patients with 60 abrasive molars were selected according to the inclusion criteria. Molars and premolars were divided into 2 groups randomly. Teeth in the experimental group were treated with Er,Cr:YSGG laser combined with AdperTM Easy One, while teeth in the control group were treated with Nd:YAG laser combined with AdperTM Easy One, composite resin Z350 was selected to restore the defect...
December 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29682757/infrared-lasers-for-the-treatment-of-moderate-to-severe-periodontitis-an-american-academy-of-periodontology-best-evidence-review
#19
Leandro Chambrone, Umberto D Ramos, Mark A Reynolds
OBJECTIVE: This systematic review assesses the efficacy of infrared laser therapy used alone or as an adjunct to nonsurgical or surgical periodontal therapy, on clinical and patient-centered outcomes in patients with periodontitis. METHODS: Randomized clinical trials (RCTs) with a follow-up duration ≥ 3 months that evaluated root surface debridement (i.e., scaling and root debridement with or without surgical access) to laser therapy alone or laser therapy plus root surface debridement for the treatment of adult patients (≥18 years old) with moderate to severe aggressive or chronic periodontitis were considered eligible for inclusion...
April 22, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29676568/toward-rechargeable-persistent-luminescence-for-the-first-and-third-biological-windows-via-persistent-energy-transfer-and-electron-trap-redistribution
#20
Jian Xu, Daisuke Murata, Jumpei Ueda, Bruno Viana, Setsuhisa Tanabe
Persistent luminescence (PersL) imaging without real-time external excitation has been regarded as the next generation of autofluorescence-free optical imaging technology. However, to achieve improved imaging resolution and deep tissue penetration, developing new near-infrared (NIR) persistent phosphors with intense and long duration PersL over 1000 nm is still a challenging but urgent task in this field. Herein, making use of the persistent energy transfer process from Cr3+ to Er3+ , we report a novel garnet persistent phosphor of Y3 Al2 Ga3 O12 codoped with Er3+ and Cr3+ (YAG G:Er-Cr), which shows intense Cr3+ PersL (∼690 nm) in the deep red region matching well with the first biological window (NIR-I, 650-950 nm) and Er3+ PersL (∼1532 nm) in the NIR region matching well with the third biological window (NIR-III, 1500-1800 nm)...
April 20, 2018: Inorganic Chemistry
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