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https://www.readbyqxmd.com/read/29204250/generation-and-role-of-reactive-oxygen-and-nitrogen-species-induced-by-plasma-lasers-chemical-agents-and-other-systems-in-dentistry
#1
REVIEW
Nayansi Jha, Jae Jun Ryu, Eun Ha Choi, Nagendra Kumar Kaushik
The generation of reactive oxygen and nitrogen species (RONS) has been found to occur during inflammatory procedures, during cell ischemia, and in various crucial developmental processes such as cell differentiation and along cell signaling pathways. The most common sources of intracellular RONS are the mitochondrial electron transport system, NADH oxidase, and cytochrome P450. In this review, we analyzed the extracellular and intracellular sources of reactive species, their cell signaling pathways, the mechanisms of action, and their positive and negative effects in the dental field...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29194966/the-use-of-custom-made-dental-splints-for-robotic-and-rigid-endoscopic-surgery-of-the-upper-aerodigestive-tract
#2
Kishan Ubayasiri, Wai Sum Cho, Paul Smith, Robin Thorpe, Mohamed-Shaji Mansuri, David Laugharne, Sean Mortimore
Custom made dental splints allow for significantly improved access in difficult cases, especially those involving the laser or robot. Our customization also allows bespoke accommodation of the Boyle Davis gag or FK-retractor. These guards never displace and afford protection to the otherwise exposed lower teeth. The dental splints are reusable. This article is protected by copyright. All rights reserved.
December 1, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29192623/color-recovery-effect-of-different-bleaching-systems-on-a-discolored-composite-resin
#3
P Gul, O T Harorlı, I B Ocal, Z Ergin, C Barutcigil
BACKGROUND AND PURPOSE: Discoloration of resin-based composites is a commonly encountered problem, and bleaching agents may be used for the therapy of the existing discoloration. The purpose of this study was to investigate in vitro color recovery effect of different bleaching systems on the heavily discolored composite resin. MATERIALS AND METHODS: Fifty disk-shaped dental composite specimens were prepared using A2 shade nanohybrid universal composite resin (3M ESPE Filtek Z550, St...
October 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29179332/policy-on-the-use-of-lasers-for-pediatric-dental-patients
#4
(no author information available yet)
No abstract text is available yet for this article.
September 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/29177123/recent-advances-in-adhesive-bonding-the-role-of-biomolecules-nanocompounds-and-bonding-strategies-in-enhancing-resin-bonding-to-dental-substrates
#5
Eliseu A Münchow, Marco C Bottino
Purpose of review: To present an overview on the main agents (i.e., biomolecules and nanocompounds) and/or strategies currently available to amplify or stabilize resin-dentin bonding. Recent findings: According to studies retrieved for full text reading (2014-2017), there are currently six major strategies available to overcome resin-dentin bond degradation: (i) use of collagen crosslinking agents, which may form stable covalent bonds with collagen fibrils, thus strengthening the hybrid layer; (ii) use of antioxidants, which may allow further polymerization reactions over time; (iii) use of protease inhibitors, which may inhibit or inactivate metalloproteinases; (iv) modification of the bonding procedure, which may be performed by using the ethanol wet-bonding technique or by applying an additional adhesive (hydrophobic) coating, thereby strengthening the hybrid layer; (v) laser treatment of the substrate prior to bonding, which may cause specific topographic changes in the surface of dental substrates, increasing bonding efficacy; and (vi) reinforcement of the resin matrix with inorganic fillers and/or remineralizing agents, which may positively enhance physico-mechanical properties of the hybrid layer...
September 2017: Current Oral Health Reports
https://www.readbyqxmd.com/read/29171091/internal-fit-of-three-unit-fixed-dental-prostheses-produced-by-computer-aided-design-computer-aided-manufacturing-and-the-lost-wax-metal-casting-technique-assessed-using-the-triple-scan-protocol
#6
Bjørn E Dahl, Jon E Dahl, Hans J Rønold
Suboptimal adaptation of fixed dental prostheses (FDPs) can lead to technical and biological complications. It is unclear if the computer-aided design/computer-aided manufacturing (CAD/CAM) technique improves adaptation of FDPs compared with FDPs made using the lost-wax and metal casting technique. Three-unit FDPs were manufactured by CAD/CAM based on digital impression of a typodont model. The FDPs were made from one of five materials: pre-sintered zirconium dioxide; hot isostatic pressed zirconium dioxide; lithium disilicate glass-ceramic; milled cobalt-chromium; and laser-sintered cobalt-chromium...
November 24, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/29160001/low-level-laser-therapy-induces-increased-viability-and-proliferation-in-isolated-cancer-cells
#7
C Kara, H Selamet, C Gökmenoğlu, N Kara
OBJECTIVES: Low level laser therapy (LLLT), which stimulates natural biological processes in the application region, is frequently used in dental treatments. The aim of our study was to evaluate the effects of LLLT which could activate precancerous cells or increase existing cancerous tissue in case of clinically undetectable situations. MATERIALS AND METHODS: Saos-2 osteoblast-like osteosarcoma cells and A549 human lung carcinoma cells were used. Twenty-four hours after preparation of cell culture plates, laser irradiation was performed 1, 2 and 3 times according to the test groups using Nd:YAG laser with the power output 0...
November 20, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/29159511/application-of-3d-models-of-palatal-rugae-to-personal-identification-hints-at-identification-from-3d-3d-superimposition-techniques
#8
Daniele Gibelli, Danilo De Angelis, Valentina Pucciarelli, Francesco Riboli, Virgilio F Ferrario, Claudia Dolci, Chiarella Sforza, Cristina Cattaneo
Palatal rugae are known in literature as individualizing anatomical structures with a strong potential for personal identification. However, a 3D assessment of their uniqueness has not yet been performed. The present study aims at verifying the uniqueness of 3D models of the palate. Twenty-six subjects were recruited among the orthodontic patients of a private dental office; from every patient, at least two dental casts were taken in different time periods, for a total of 62 casts. Dental casts were digitized by a 3D laser scanner (iSeries, Dental Wings©, Montreal, Canada)...
November 20, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29153748/marginal-discrepancy-of-noble-metal-ceramic-fixed-dental-prosthesis-frameworks-fabricated-by-conventional-and-digital-technologies
#9
Ahmed Afify, Stephan Haney, Ronald Verrett, Michael Mansueto, James Cray, Russell Johnson
STATEMENT OF PROBLEM: Studies evaluating the marginal adaptation of available computer-aided design and computer-aided manufacturing (CAD-CAM) noble alloys for metal-ceramic prostheses are lacking. PURPOSE: The purpose of this in vitro study was to evaluate the vertical marginal adaptation of cast, milled, and direct metal laser sintered (DMLS) noble metal-ceramic 3-unit fixed partial denture (FDP) frameworks before and after fit adjustments. MATERIAL AND METHODS: Two typodont teeth were prepared for metal-ceramic FDP abutments...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29133965/evaluation-of-adjunctive-effect-of-low-level-laser-therapy-on-pain-swelling-and-trismus-after-surgical-removal-of-impacted-lower-third-molar-a-double-blind-randomized-clinical-trial
#10
Farrokh Farhadi, Hosein Eslami, Alireza Majidi, Vahid Fakhrzadeh, Milad Ghanizadeh, Sahar KhademNeghad
Background and Aim: Wisdom teeth remains impacted in the jaw due to several reasons and surgery of impacted wisdom teeth is one of the most common surgeries in dental clinics. Pain, swelling and trismus are the common complications after this surgery which affect quality of life. In articles, various methods are introduced to control immediate inflammatory-response associated with third-molar surgery. The aim of this study is to evaluate the adjunctive effect of low-level laser Therapy on pain, swelling and trismus after surgical removal of impacted lower third molar...
September 30, 2017: Laser Therapy
https://www.readbyqxmd.com/read/29130364/fluorescent-labeling-and-2-photon-imaging-of-mouse-tooth-pulp-nociceptors
#11
A Kadala, P Sotelo-Hitschfeld, Z Ahmad, P Tripal, B Schmid, A Mueller, L Bernal, Z Winter, S Brauchi, U Lohbauer, K Messlinger, J K Lennerz, K Zimmermann
Retrograde fluorescent labeling of dental primary afferent neurons (DPANs) has been described in rats through crystalline fluorescent DiI, while in the mouse, this technique was achieved with only Fluoro-Gold, a neurotoxic fluorescent dye with membrane penetration characteristics superior to the carbocyanine dyes. We reevaluated this technique in the rat with the aim to transfer it to the mouse because comprehensive physiologic studies require access to the mouse as a model organism. Using conventional immunohistochemistry, we assessed in rats and mice the speed of axonal dye transport from the application site to the trigeminal ganglion, the numbers of stained DPANs, and the fluorescence intensity via 1) conventional crystalline DiI and 2) a novel DiI formulation with improved penetration properties and staining efficiency...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29128693/effect-of-adding-support-structures-for-overhanging-part-on-fatigue-strength-in-selective-laser-melting
#12
Yuka Kajima, Atsushi Takaichi, Takayuki Nakamoto, Takahiro Kimura, Nuttaphon Kittikundecha, Yusuke Tsutsumi, Naoyuki Nomura, Akira Kawasaki, Hidekazu Takahashi, Takao Hanawa, Noriyuki Wakabayashi
Selective laser melting (SLM) technology was recently introduced to fabricate dental prostheses. However, the fatigue strength of clasps in removable partial dentures prepared by SLM still requires improvement. In this study, we attempted to improve the fatigue strength of clasps by adding support structures for overhanging parts, which can generally be manufactured at an angle to be self-supporting. The results show that the fatigue strength of the supported specimens was more than twice that of unsupported specimens...
November 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29124235/in-vivo-xct-bone-characterization-of-lattice-structured-implants-fabricated-by-additive-manufacturing
#13
A-F Obaton, J Fain, M Djemaï, D Meinel, F Léonard, E Mahé, B Lécuelle, J-J Fouchet, G Bruno
Several cylindrical specimens and dental implants, presenting diagonal lattice structures with different cell sizes (600, 900 and 1200 μm) were additively manufactured by selective laser melting process. Then they were implanted for two months in a sheep. After removal, they were studied by Archimedes' method as well as X-ray computed tomography in order to assess the penetration of bone into the lattice. We observed that the additive manufactured parts were geometrically conformed to the theoretical specifications...
August 2017: Heliyon
https://www.readbyqxmd.com/read/29121452/3d-maskless-micropatterning-for-regeneration-of-highly-organized-tubular-tissues
#14
Chi Ma, Tiejun Qu, Bei Chang, Yan Jing, Jerry Q Feng, Xiaohua Liu
Micropatterning is a widely used powerful tool to create highly ordered microstructures on material surfaces. However, due to technical limitations, the integration of micropatterned microstructures into bioinspired 3D scaffolds to successfully regenerate well-organized functional tissues is not achieved. In this work, a unique maskless micropatterning technology is reported to create 3D nanofibrous matrices with highly organized tubular architecture for tissue regeneration. This micropatterning method is a laser-guided, noncontact, high-precision, flexible computer programming of machining process that can create highly ordered tubules with the density ranged from 1000 to 60 000 mm(-2) and the size varied from 300 nm to 30 µm in the bioinspired 3D matrix...
November 9, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29119417/effect-of-methylene-blue-mediated-antimicrobial-photodynamic-therapy-on-dentin-caries-microcosms
#15
Daniela Alejandra Cusicanqui Méndez, Eliezer Gutierrez, Evandro José Dionísio, Thaís Marchini Oliveira, Marília Afonso Rabelo Buzalaf, Daniela Rios, Maria Aparecida Andrade Moreira Machado, Thiago Cruvinel
Antimicrobial photodynamic therapy (aPDT) has been proposed as an adjuvant treatment of dental caries, although there are no well-defined protocols to its clinical application. This study aimed to evaluate the influence of aPDT on the viability of microorganisms, vitality of biofilms, and lactic acid production of dentin caries microcosms. Biofilms were grown on bovine dentin discs in anaerobic conditions at 37 °C for 5 days, inoculating infected carious dentin in modified McBain medium plus 1% sucrose. The biofilms were treated by the combination of deionized water or 100 mg L(-1) methylene blue (MB) with 0, 37...
November 8, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29099682/er-cr-ysgg-laser-energy-delivery-pulse-and-power-effects-on-enamel-surface-and-erosive-resistance
#16
Renan Mota de Oliveira, Vinicius Matsuzaki de Souza, Camila Machado Esteves, Ynara Bosco de Oliveira Lima-Arsati, Alessandra Cassoni, José Augusto Rodrigues, Aldo Brugnera Junior
BACKGROUND: High power lasers have been suggested as a useful tool for dental caries and erosion prevention due to the increase of enamel acid resistance. OBJECTIVE: to evaluate the effect of Er,Cr:YSGG (erbium,chromium:yttrium, scandium, gallium, garnet) laser irradiation pulse frequency and power on enamel surface and acid erosion resistance. METHODS: By combining pulse frequency (5-75 Hz) and power settings (0.10-1.00 W), 20 irradiated groups and one nonirradiated control group were tested...
November 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29084299/effects-of-cement-abutment-surface-pretreatment-and-artificial-aging-on-the-force-required-to-detach-cantilever-fixed-dental-prostheses-from-dental-implants
#17
Stefanie Kappel, Taras Chepura, Marc Schmitter, Peter Rammelsberg, Stefan Rues
PURPOSE: To examine the in vitro effects of different cements, abutment surface preconditioning, and artificial aging on the maximum tensile force needed to detach cantilever fixed dental prostheses (FDPs) from dental implants with titanium abutments. MATERIALS AND METHODS: A total of 32 tissue-level implants were combined with standardized titanium abutments. For each test group, eight cantilever FDPs were fabricated using selective laser melting (cobalt-chromium [CoCr] alloy)...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29082462/low-level-laser-therapy-with-940%C3%A2-nm-diode-laser-on-stability-of-dental-implants-a-randomized-controlled-clinical-trial
#18
Parviz Torkzaban, Shahin Kasraei, Sara Torabi, Maryam Farhadian
Low-level laser therapy (LLLT) is a non-invasive modality to promote osteoblastic activity and tissue healing. The aim of this study was to evaluate the efficacy of LLLT for improvement of dental implant stability. This randomized controlled clinical trial was performed on 80 dental implants placed in 19 patients. Implants were randomly divided into two groups (n = 40). Seven sessions of LLLT (940 nm diode laser) were scheduled for the test group implants during 2 weeks. Laser was irradiated to the buccal and palatal sides...
October 29, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29071032/comparative-effectiveness-of-low-level-laser-therapy-and-transcutaneous-electric-nerve-stimulation-on-temporomandibular-joint-disorders
#19
Massoud Seifi, Asghar Ebadifar, Sattar Kabiri, Mohammad Reza Badiee, Zahra Abdolazimi, Parisa Amdjadi
Introduction: Temporomandibular joint disorders (TMDs) are the most common source of pain on the face. There are multiple etiologies, and several types of treatment have been reported. The use of non-invasive and reversible therapies in the treatment of such problems is recommended. The present study evaluated the effect of low-level laser (LLL) therapy and transcutaneous electric nerve stimulation (TENS) on TMDs. Methods: In this single-blind study, 40 patients with temporomandibular disorders were randomly divided into four groups: TENS (TENSTem dental), LLL (diode 810 nm CW), shamTENS, and sham-LLL...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29071028/successful-use-of-lower-level-laser-therapy-in-the-treatment-of-medication-related-osteonecrosis-of-the-jaw
#20
Gustavo Antonio Correa Momesso, Fábio Roberto de Souza Batista, Cecília Alves de Sousa, Valthierre Nunes de Lima, Tárik Ocon Braga Polo, Jaqueline Suemi Hassumi, Idelmo Rangel Garcia Júnior, Leonardo Perez Faverani
Case Presentation: This study aimed to report a case of medication related osteonecrosis of the jaw (MRONJ) of a 65-year-old female patient referred to the Oral and Maxillofacial Surgery team from Araçatuba Dental School, complaining about mobility of a previously dental implant placed on the posterior maxillary region. Clinical examination revealed an extensive necrosis area around the implant region. The patient reported bisphosphonate therapy with sodium alendronate for prevention of osteoporosis 5 years ago...
2017: Journal of Lasers in Medical Sciences
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