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Lasers in dentistry

Beatriz Martines de Souza, Daiana Moreli Soares Dos Santos, Ana Carolina Magalhães
The occurrence of caries lesions adjacent to restorations is a serious problem in Dentistry. Therefore, new antimicrobial restorative materials could help to prevent recurrent carious lesions. This study evaluated the effect of a new glass ionomer cement (Ion Z) on the viability of a microcosm biofilm and on the development of enamel demineralization. Enamel samples were filled with the following materials (n=9): A) Ion-Z (FGM Ltda); B) Maxxion R (FGM Ltda); C) Ketac Fil Plus (3M ESPE) and D) no restoration (control)...
November 2018: Brazilian Dental Journal
Rima Nejem Wakim, Melanie Namour, Hoang Viet Nguyen, Andre Peremans, Toni Zeinoun, Alain Vanheusden, Eric Rompen, Samir Nammour
Oral rehabilitation with dental implants has revolutionized the field of dentistry and has been proven to be an effective procedure. However, the incidence of peri-implantitis has become an emerging concern. The efficacy of the decontamination of the implant surface, by means of lasers, is still controversial. Previous studies have revealed a reduction in osteoblast adhesion to carbon-contaminated implant surfaces. This in-vitro study aimed to evaluate the decontamination of failed implants by assessing the carbon proportion, after irradiation by low-energy erbium yttrium-aluminum-garnet laser (Er:YAG) (Fotona; 2940 nm, Ljubljana, Slovenia) for a single and for multiple passages, until getting a surface, free of organic matters; to find the appropriate procedure for dental-implant surface-decontamination...
December 1, 2018: Dentistry journal
Andrey V Belikov, Alexei V Skrypnik
OBJECTIVES: The use of near-IR diode lasers for contact soft tissue surgery is attended by a risk of severe thermal damage of surrounding tissues due to the low cutting efficiency of these lasers. To increase the cutting efficiency of a near-IR lasers in contact surgery special tips (converters) which transform laser light to heat are used. The present in vivo study evaluated temperature dynamics and soft tissue cutting efficiency of 980 nm diode laser equipped with standard carbon- and novel erbium- and titanium-doped converters...
November 15, 2018: Lasers in Surgery and Medicine
Asma Perveen, Carlo Molardi, Carlo Fornaini
The dental industry without lasers is inconceivable right now. This captivating technology has outlasted other possible alternative technologies applied in dentistry in the past due to its precision, accuracy, minimal invasive effect as well as faster operating time. Other alternatives such as soldering, resistance (spot) welding, plasma (torch) welding, and single pulse tungsten inert gas welding have their pros and cons; nevertheless, laser welding remains the most suitable option so far for dental application...
April 28, 2018: Micromachines
Attiguppe Prabhakar, Manjunath Lokeshwari, Saraswathi V Naik, Chandrashekar Yavagal
Aim: To compare and evaluate morphological changes and bacterial deposits in primary carious molars after caries excavation with Carie-Care, erbium-doped yttrium aluminum garnet (Er:YAG) laser, and round tungsten carbide bur. Materials and methods: Thirty human carious primary molars extracted for therapeutic reasons were sectioned mesiodistally. These sectioned samples were allocated into three groups (20 samples each): group I: Carie Care, group II: Er:YAG laser, and group III: round tungsten carbide bur...
July 2018: International Journal of Clinical Pediatric Dentistry
Saverio Capodiferro, Angela Tempesta, Luisa Limongelli, Eugenio Maiorano, Stefano Benedicenti, Gianfranco Favia
OBJECTIVE AND BACKGROUND: To report on a case of cyclosporine A-related gingival overgrowth (GO) treated by conventional scaling and Erbium:YAG laser that unexpectedly showed complete healing with normalization of the gingiva, making unnecessary further surgical treatment for gingival volume reduction. Since Erbium:YAG laser was approved in 1997 by the U.S. Food and Drug Administration for hard and soft tissue treatments in dentistry, several studies have been published to demonstrate its efficacy for bone cutting, plaque and subgingival calculus removal, and antiseptic effects both on soft and hard periodontal tissues...
October 11, 2018: Photomedicine and Laser Surgery
Narjiss Akerzoul, Saliha Chbicheb
Oral papilloma is a benign proliferation of the stratified epithelium, which results in a papillary or verrucous exophytic mass, which can be induced by human papillomavirus. These oral mucosa lesions are most often asymptomatic and have small progression. Laser-assisted surgery is common nowadays with several advantages including successful hemostasis, devoid of sutures, wound sterilization and minimal postoperative pain, and edema. The aim of this report is to present the oral papilloma in a 40-year-old female patient and its treatment with soft-tissue laser...
September 2018: Contemporary Clinical Dentistry
Abtesam Aljdaimi, Hugh Devlin, Mark Dickinson, Timothy Burnett, Thomas J A Slater
OBJECTIVES: The aim of this study was to see the effect of Er:YAG laser irradiation in dentine and compare this with its effect in enamel. The mechanism of crack propagation in dentine was emphasised and its clinical implications were discussed. MATERIALS AND METHODS: Coronal sections of sound enamel and dentine were machined to 50-μm thickness using a FEI-Helios Plasma (FIB). The specimen was irradiated for 30 s with 2.94-μm Er:YAG laser radiation in a moist environment, using a sapphire dental probe tip, with the tip positioned 2 mm away from the sample surface...
October 6, 2018: Clinical Oral Investigations
Thomas Drost, Susanne Reimann, Matthias Frentzen, Jörg Meister
Challenges especially in the minimal invasive restorative treatment of teeth require further developments of composite polymerization techniques. These include, among others, the securing of a complete polymerization with moderate thermal stress for the pulp. The aim of this study is to compare current light curing sources with a blue diode laser regarding curing depth and heat generation during the polymerization process. A diode laser (445 nm), a LED, and a halogen lamp were used for polymerizing composite resins...
October 6, 2018: Lasers in Medical Science
Carlos Alberto Tenis, Manoela Domingues Martins, Marcela Leticia Leal Gonçalves, Daniela de Fátima Teixeira da Silva, João Júlio da Cunha Filho, Marco Antonio Trevizani Martins, Raquel Agnelli Mesquita-Ferrari, Sandra Kalil Bussadori, Kristianne Porta Santos Fernandes
BACKGROUND: In dentistry, one of the most common surgical procedures is the removal of retained third molars. This surgery generates great morbidity to the participants for causing pain, edema, and trismus due to surgical trauma. The objective of the present study is to evaluate the efficacy of photobiomodulation with light emitting diode (LED) in the control of pain, facial edema, trismus, and quality of life resulting from the extraction of retained lower third molars. METHODS: A randomized, double-blind, placebo-controlled clinical trial involving 38 adult participants, who meet the criteria of eligibility and agree to participate in the study...
September 2018: Medicine (Baltimore)
Roberto De Santis, Teresa Russo, Antonio Gloria
Material structure-property relationship is strongly related to the employed process technology. Over the past years, laser processing of engineering materials has been proposed in many fields and different uses for diode lasers have been found in dentistry. In this contest, the potential of GaN- and InGaN-based laser diodes to cure dental materials was analysed. Two wavelengths of 405 nm and 445 nm were used as heat or light sources for warm condensation of gutta-percha, light transmission in dental posts and brackets or light curing of dental composites...
November 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Wei Liu, Hai Qing, Xibo Pei, Jian Wang
STATEMENT OF PROBLEM: Selective laser melting (SLM) has become popular in prosthetic dentistry. However, only limited information is available for the internal adaptation of cobalt-chromium (Co-Cr) posts fabricated by SLM. PURPOSE: The purpose of this in vitro study was to investigate the internal adaptation of Co-Cr metal posts fabricated by SLM technique. MATERIAL AND METHODS: Thirty-six Co-Cr metal posts were fabricated by conventional casting, subtractive computer-aided design and computer-aided manufacturing (CAD-CAM), and additive CAD-CAM, by making an impression from a standardized model of a tooth with a single root canal...
August 18, 2018: Journal of Prosthetic Dentistry
Ali Saafan, Mohamed H Zaazou, Marwa K Sallam, Osama Mosallam, Heba A El Danaf
AIM: To assess the antibacterial competence of 650 nm diode laser, Methylene Blue (MB) and Silver Nano-Particles (Ag NPs) on Streptococcus mutans in biofilm-induced caries models. MATERIAL AND METHODS: One hundred eighty specimens were prepared and equally divided into 6 groups. One group was untreated (control), and the others were subjected to either MB, laser, Ag NPs, the combination of MB and Laser or MB, laser and Ag NPs. RESULTS: Comparison of the log10 mean Colony Forming Units per millilitre (CFU/ml) values of each of the treated 5 groups and the control group was found statistically significant (P-value < 0...
July 20, 2018: Open Access Macedonian Journal of Medical Sciences
Kyoung-Suk Moon, Young-Bum Park, Ji-Myung Bae, Seunghan Oh
The infection control of implants is one of the hot issues in the field of medicine and dentistry. In this study, we prepared gold nanorod-sputtered titania nanotubes on titanium surface, which is the main component of implant material, and aimed to estimate the remote-controlled tetracycline release and resulting antibacterial effects of gold nanorod-sputtered titania nanotubes using near-infrared laser irradiation. Gold nanorods prepared by ion plasma sputtering (aspect ratio = 1:3) showed optical properties like those of chemically synthesized gold nanorods, exhibiting photothermal effects in the near-infrared region, as demonstrated using field-emission scanning electron microscopy, transmission electron microscopy, and diffuse ultraviolet-visible-near-infrared spectrophotometry...
January 2018: Journal of Tissue Engineering
Tuqa Raghis, Ghiath Mahmoud, Ahmed Abdullah, Omar Hamadah
OBJECTIVE: To evaluate the clinical effect of 10.6 µm CO2 laser irradiation on the formation of demineralised lesions (DLs) around orthodontic brackets. DESIGN: A two-arm, split-mouth, randomised clinical trial (RCT). SETTING: The Orthodontic Department, Faculty of Dentistry, Damascus University, Syria. PARTICIPANTS: Twenty-six patients with a total of 520 teeth were recruited into the trial. METHOD: Two reversed quadrants of the dental arches in each patient were randomly allocated to CO2 laser application around the orthodontic brackets...
August 2, 2018: Journal of Orthodontics
Andrei C Ionescu, Gloria Cazzaniga, Marco Ottobelli, Jack L Ferracane, Gaetano Paolone, Eugenio Brambilla
OBJECTIVES: The interfacial conditions occurring during light-curing procedures of resin-based composites (RBCs) influence their surface properties and therefore the biological behavior of the material. This study aimed to evaluate the influence of different surface curing conditions on in vitro biofilm formation by Streptococcus mutans and mixed oral microflora, in the presence or absence of surface salivary pre-conditioning. METHODS: Two nanohybrid RBCs and four interfacial curing conditions (open air, argon, nitrogen and glycerin) were evaluated...
October 2018: Journal of Dentistry
Amrita Jha, Vivek Gupta, Roopa Adinarayan
Laser has emerged as an adjunct in several treatment modalities in dentistry in the past few decades. This less invasive bladeless technique is bringing revolutionary outcomes in a plethora of periodontal treatment procedures as well. A unique ameliorative approach termed LANAP, described as laser-assisted new attachment procedure was developed by Gregg and McCarthy. In 1990 they introduced an innovative treatment for diseases of gums incorporating pulsed neodymium yttrium aluminum garnet (Nd: YAG) 1064 nm wavelength laser (PerioLase MVP7)...
2018: Journal of Lasers in Medical Sciences
Babak Rastegar, Brice Thumilaire, Guillaume A Odri, Sergio Siciliano, Jan Zapała, Pierre Mahy, Raphael Olszewski
BACKGROUND: Validation of three-dimensional (3D) reconstructions of full dental arches with crowns and roots based on cone beam computed tomography (CBCT) imaging represents a key issue in 3D digital dentistry. OBJECTIVES: The aim of the study was to search for the most accurate in vivo windowing-based manual tooth segmentation using CBCT. The null hypothesis was that all applied windowing protocols were equivalent in terms of in vivo tooth volume measurement using CBCT...
July 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Sogra Yassaei, Hossein Aghili, Neda Shahraki, Isa Safari
Objective: This study aimed to assess the efficacy of erbium-doped yttrium aluminum garnet (Er:YAG) laser, pastes containing casein phosphopeptide amorphous calcium phosphate (CPP-ACP) with and without fluoride and their combination for prevention of white spot lesions in the enamel. Materials and Methods: This in vitro experimental study was conducted on 90 extracted sound premolars. The teeth were then randomly divided into six groups of 15: (1) Control, (2) laser, (3) CPP-ACP with fluoride (GC MI Paste, Recaldent™ 900 ppm as NaF), (4) CPP-ACP without fluoride (GC Tooth Mousse Recaldent™), (5) laser + CPP-ACP with fluoride, and (6) laser + CPP-ACP without fluoride...
April 2018: European Journal of Dentistry
Alessia Tani, Flaminia Chellini, Marco Giannelli, Daniele Nosi, Sandra Zecchi-Orlandini, Chiara Sassoli
Photobiomodulation (PBM) has been used for bone regenerative purposes in different fields of medicine and dentistry, but contradictory results demand a skeptical look for its potential benefits. This in vitro study compared PBM potentiality by red (635 ± 5 nm) or near-infrared (NIR, 808 ± 10 nm) diode lasers and violet-blue (405 ± 5 nm) light-emitting diode operating in a continuous wave with a 0.4 J/cm² energy density, on human osteoblast and mesenchymal stromal cell (hMSC) viability, proliferation, adhesion and osteogenic differentiation...
July 3, 2018: International Journal of Molecular Sciences
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