scholarly journals Regulador de distância para pesquisa de laser de Er:YAG sem contato

2021 ◽  
Vol 41 (1) ◽  
pp. 63-65
Author(s):  
Edela Puricelli ◽  
Carlos Eduardo Baraldi ◽  
Eubirajara B. Medeiros ◽  
Gustavo Lisboa Martins ◽  
João Julio da Cunha Filho
Keyword(s):  
Er:Yag Laser ◽  
Target Tissue ◽  
Experimental Surgery ◽  
Laser Device ◽  
New Device

Aims: develop a distance regulator for the Er:YAG laser. Methods: a metallic device adaptable to the 2051 handpiece was developed. Interchangeable metallic pieces, with diferent lengths, are adaptable to the regulator's body. Results: this laser device allows standard distances for laser delivering, from 08 to 20 millimetres from target tissue. Conclusions: the use of this new device allows a standard evaluation of the Er:YAG laser effects in experimental surgery, when emitted from different distances of the target tissue.

scholarly journals Human Dental Enamel and Dentin Structural Effects after Er:yag Laser Irradiation

2014 ◽  
Vol 15 (3) ◽  
pp. 283-287 ◽  
Author(s):  
Mateus Rodrigues Tonetto ◽  
Marcelo Ferrarezi de Andrade ◽  
Shelon Cristina Souza Pinto ◽  
Darlon Martins Lima ◽  
José Roberto Cury Saad ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Soft Tissues ◽  
Er:Yag Laser ◽  
Laser System ◽  
Dental Enamel ◽  
Target Tissue ◽  
Structural Effects ◽  
Ablation Process ◽  
Dental Tissues ◽  
Laser Systems

ABSTRACT Ideally projected to be applied on soft tissues, infrared lasers were improved by restorative dentistry to be used in hard dental tissues cavity preparations — namely enamel and dentin. This paper evidentiates the relevant aspects of infrared Erbium laser's action mechanism and its effects, and characterizes the different effects deriving from the laser's beams emission. The criteria for use and selection of optimal parameters for the correct application of laser systems and influence of supporting factors on the process, such as water amount and its presence in the ablation process, protection exerted by the plasma shielding and structural factors, which are indispensable in dental tissues cavity preparation related to restorative technique, are subordinated to optical modifications caused by the interaction of the energy dissipated by these laser light emission systems in the targeted tissue substrate. Clinical relevance Differences in the action of infrared Erbium laser system in regard to the nature of the ablation process and variations on the morphological aspects observed in the superficial structure of the target tissue irradiated, may be correlated to the structural optical modifications of the substrate produced by an interaction of the energy propagated by laser systems. How to cite this article Lima DM, Tonetto MR, de Mendonça AAM, Elossais AA, Saad JRC, de Andrade MF, Pinto SCS, Bandéca MC. Human Dental Enamel and Dentin Structural Effects after Er:yag Laser Irradiation. J Contemp Dent Pract 2014;15(3):283-287.

scholarly journals Er:Yag laser irradiation of the microbiological apical biofilm

2006 ◽  
Vol 17 (4) ◽  
pp. 296-299 ◽  
Author(s):  
Ângela Toshie Araki ◽  
Yuji Ibraki ◽  
Tomofumi Kawakami ◽  
José Luiz Lage-Marques
Keyword(s):  
Laser Irradiation ◽  
Microbial Contamination ◽  
Er:Yag Laser ◽  
Root Apex ◽  
Sem Analysis ◽  
Target Area ◽  
Periodontal Tissue ◽  
Laser Device ◽  
Periapical Lesions ◽  
Mechanical Removal

One problem in cases of healing-resistant periapical lesions is to eradicate the contamination at the periapical area. This contamination is due to the microbiological biofilm formed by microorganisms and their subproducts lodged in apical third of the root, on both cementum and dentin surface. Paraendodontic surgery consists of the mechanical removal of harmful agents to promote healing and periapical health. The purpose of this study was to assess the results of Er:YAG laser irradiation on the apical root third of newly extracted teeth to eliminate microbial contamination on root apex surface. Apical irradiation was performed with an Er:YAG laser device using an experimental contact tip, at 100 mJ, 10 Hz, 1 W, 39 J/cm², 3 times on the target area. SEM analysis showed the elimination of part of the irradiated cementum and the formation of small roughened without exposing the subjacent dentin. Vaporization of the remaining periodontal tissue and removal of microbiological apical biofilm (MAB) were also observed on the irradiated areas. Under the tested conditions and based on the findings of this study, Er:YAG laser may be considered effective for removal of microbiological apical biofilm.

scholarly journals Design of a Novel Servo-motorized Laser Device for Visual Pathways Diseases Therapies Based on Neuroplasticity

2014 ◽  
Vol 2 (4) ◽  
Author(s):  
Carlos I. Sarmiento ◽  
Student Member, IEEE; and V. B. Surya Prasath
Keyword(s):  
Software Development ◽  
Visual Stimulus ◽  
Control Mechanism ◽  
Electronic Materials ◽  
Visual Stimuli ◽  
Visual Pathways ◽  
Research Protocol ◽  
Laser Device ◽  
New Device ◽  
Spherical Structure

We discuss a novel servo-motorized laser device and a research protocol for visual pathways diseases therapies. The proposed servo-mechanized laser device can be used for potential rehabilitation of patients with hemianopia, quadrantanopia, scotoma and some types of cortical damages. The device uses a semi spherical structure where the visual stimulus will be shown inside, according to a previous stimuli therapy designed by an ophthalmologist or neurologist. The device uses a pair of servomotors (with torque=1.5kg), which controls the laser stimuli position for the internal therapy and another pair for external therapy. Using electronic tools such as microcontrollers along with miscellaneous electronic materials, combined with LabVIEW based interface, a control mechanism is developed for the new device. The proposed device is well suited to run various visual stimuli therapies. We outline the major design principles including the physical dimensions, laser device’s kinematical analysis and the corresponding software development.

Lasers in Periodontics: An Overview

2010 ◽  
Vol 4 (Spl) ◽  
pp. 29-34 ◽  
Author(s):  
Vivek K Bains ◽  
Rhythm Bains
Keyword(s):  
Soft Tissue ◽  
Surgical Procedures ◽  
Er:Yag Laser ◽  
Root Surface ◽  
Clinical Applications ◽  
Laser Device ◽  
Implant Surface ◽  
Thermal Change ◽  
Procedural Cost ◽  
Subgingival Calculus

ABSTRACT Among commonly used lasers in dentistry viz CO2, Nd:YAG, Ho:YAG, Er: YAG, Er, Cr:YSGG, Nd:YAP, GaAs (diode) and argon, Er:YAG laser, at appropriate settings, possesses the best property for selective subgingival calculus removal without a thermal change of the root surface, soft tissue surgical procedures, root surface alterations, degranulation and implant surface decontamination alongwith proposed application in osseous surgery. Epithelial exclusion using CO2 laser has been suggested to retard its downward growth. Waterlase® and PeriowaveTM systems are recent devices that have further revolutionised the laser techonology for its favourable clinical applications; however, the procedural cost with the laser device still constitutes an obstacle for its routine application.

Clinical Outcomes After Nonsurgical Periodontal Therapy with an Er:YAG Laser Device: A Randomized Controlled Pilot Study

2012 ◽  
Vol 30 (7) ◽  
pp. 347-353 ◽  
Author(s):  
Zahi Badran ◽  
Hervé Boutigny ◽  
Xavier Struillou ◽  
Pierre Weiss ◽  
Olivier Laboux ◽  
...  
Keyword(s):  
Pilot Study ◽  
Clinical Outcomes ◽  
Er:Yag Laser ◽  
Periodontal Therapy ◽  
Laser Device ◽  
Randomized Controlled ◽  
Nonsurgical Periodontal Therapy

Nuclear receptors in disease: the oestrogen receptors

2004 ◽  
Vol 40 ◽  
pp. 157-167 ◽  
Author(s):  
Maria Nilsson ◽  
Karin Dahlman-Wright ◽  
Jan-Åke Gustafsson
Keyword(s):  
Nuclear Receptors ◽  
Target Genes ◽  
Receptor Subtype ◽  
Target Tissue ◽  
Oestrogen Receptors ◽  
Nucleotide Polymorphisms ◽  
Cell Type ◽  
Single Nucleotide ◽  
Beneficial Effects ◽  
The Family

For several decades, it has been known that oestrogens are essential for human health. The discovery that there are two oestrogen receptors (ERs), ERalpha and ERbeta, has facilitated our understanding of how the hormone exerts its physiological effects. The ERs belong to the family of ligand-activated nuclear receptors, which act by modulating the expression of target genes. Studies of ER-knockout (ERKO) mice have been instrumental in defining the relevance of a given receptor subtype in a certain tissue. Phenotypes displayed by ERKO mice suggest diseases in which dysfunctional ERs might be involved in aetiology and pathology. Association between single-nucleotide polymorphisms (SNPs) in ER genes and disease have been demonstrated in several cases. Selective ER modulators (SERMs), which are selective with regard to their effects in a certain cell type, already exist. Since oestrogen has effects in many tissues, the goal with a SERM is to provide beneficial effects in one target tissue while avoiding side effects in others. Refined SERMs will, in the future, provide improved therapeutic strategies for existing and novel indications.

Nanotheranostic agents for neurodegenerative diseases

2020 ◽  
Vol 4 (6) ◽  
pp. 645-675
Author(s):  
Parasuraman Padmanabhan ◽  
Mathangi Palanivel ◽  
Ajay Kumar ◽  
Domokos Máthé ◽  
George K. Radda ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Neurodegenerative Diseases ◽  
Cell Types ◽  
Specific Cell ◽  
Ageing Population ◽  
Target Tissue ◽  
Therapeutic Approaches ◽  
Surface Receptors ◽  
Theranostic Agents ◽  
Preclinical Animal Models

Neurodegenerative diseases (NDDs), including Alzheimer's disease (AD) and Parkinson's disease (PD), affect the ageing population worldwide and while severely impairing the quality of life of millions, they also cause a massive economic burden to countries with progressively ageing populations. Parallel with the search for biomarkers for early detection and prediction, the pursuit for therapeutic approaches has become growingly intensive in recent years. Various prospective therapeutic approaches have been explored with an emphasis on early prevention and protection, including, but not limited to, gene therapy, stem cell therapy, immunotherapy and radiotherapy. Many pharmacological interventions have proved to be promising novel avenues, but successful applications are often hampered by the poor delivery of the therapeutics across the blood-brain-barrier (BBB). To overcome this challenge, nanoparticle (NP)-mediated drug delivery has been considered as a promising option, as NP-based drug delivery systems can be functionalized to target specific cell surface receptors and to achieve controlled and long-term release of therapeutics to the target tissue. The usefulness of NPs for loading and delivering of drugs has been extensively studied in the context of NDDs, and their biological efficacy has been demonstrated in numerous preclinical animal models. Efforts have also been made towards the development of NPs which can be used for targeting the BBB and various cell types in the brain. The main focus of this review is to briefly discuss the advantages of functionalized NPs as promising theranostic agents for the diagnosis and therapy of NDDs. We also summarize the results of diverse studies that specifically investigated the usage of different NPs for the treatment of NDDs, with a specific emphasis on AD and PD, and the associated pathophysiological changes. Finally, we offer perspectives on the existing challenges of using NPs as theranostic agents and possible futuristic approaches to improve them.

Influence of nocturnal bruxism on the stomatognathic system. Part I: a new device for measuring mandibular movements during sleep

2001 ◽  
Vol 28 (10) ◽  
pp. 943-949 ◽  
Author(s):  
Y. Amemori ◽  
S. Yamashita ◽  
M. Ai ◽  
H. Shinoda ◽  
M. Sato ◽  
...  
Keyword(s):  
New Device ◽  
Stomatognathic System ◽  
System Part ◽  
Mandibular Movements

1849: Systematic Evaluation of 21μm Thulium Laser Device for Treatment of Benign Prostatic Enlargement in an Ex-VIVO Model

2007 ◽  
Vol 177 (4S) ◽  
pp. 614-614 ◽  
Author(s):  
Gunnar Wendt-Nordahl ◽  
Stefanie Huckele ◽  
Patrick Honeck ◽  
Peter Aiken ◽  
Thomas Knoll ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Systematic Evaluation ◽  
Thulium Laser ◽  
Laser Device ◽  
Benign Prostatic Enlargement ◽  
Ex Vivo Model ◽  
Prostatic Enlargement

Histological verification of non-specific aorta-arteritis (Takayasu's arteritis) using percutaneous transluminal atherectomy

VASA ◽  
2004 ◽  
Vol 33 (4) ◽  
pp. 247-251 ◽  
Author(s):  
Zeller ◽  
Koch ◽  
Frank ◽  
Bürgelin ◽  
Schwarzwälder ◽  
...  
Keyword(s):  
Clinical Diagnosis ◽  
Axillary Artery ◽  
Takayasu’S Arteritis ◽  
Giant Cells ◽  
Interventional Therapy ◽  
Takayasu's Arteritis ◽  
New Device ◽  
First Case ◽  
Anti Inflammatory ◽  
Percutaneous Transluminal

Diagnosis of non-specific aorto-arteritis (NSAA, Takaysu's arteritis) is typically based on clinical and investigational parameters. We report here about two patients with clinically suspected diagnosis of a Takayasu's arteritis already under anti-inflammatory therapy in whom percutaneous transluminal atherectomy of subclavian and axillary artery stenoses was performed to relief the patients from symptoms – intermittent dyspraxia of the arms – and to verify the clinical diagnosis by histology. In the first case aorto-arteritis could be histologically confirmed through the analysis of plaque material including media structures excised from the subclavian and axillary arteries using a new device for atherectomy. The biopsy showed diffuse inflammation and granulomatous lesions with giant cells typically for Takayasu's disease. In the second patient, biopsy showed no acute or chronic inflammatory signs but only atherosclerotic lesions. Percutaneous transluminal atherectomy is therefore not only an interventional but also a diagnostic tool and should be used in every case of interventional therapy of suspected aorto-arteritis to make the clinical diagnosis and as a major consequence the initiation of an aggressive anti-inflammatory medical therapy more reliable.

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