Influence of cavity preparation with Er:YAG Laser on enamel adjacent to restorations submitted to cariogenic challenge in situ: a polarized light microscopic analysis.


BACKGROUND AND OBJECTIVES:Er:YAG laser has been used for caries removal and cavity preparation, using ablative parameters. Its effect on the margins of restorations submitted to cariogenic challenge has not yet been sufficiently investigated. The aim of this study was to assess the enamel adjacent to restored Er:YAG laser-prepared cavities submitted to cariogenic challenge in situ, under polarized light microscopy. STUDY DESIGN/MATERIALS AND METHODS:Ninety-one enamel slabs were randomly assigned to seven groups (n = 13): I, II, III-Er:YAG laser with 250 mJ, 62.5 J/cm2, combined with 2, 3, and 4 Hz, respectively; IV, V, VI-Er:YAG laser with 350 mJ, 87.5 J/cm(2), combined with 2, 3, and 4 Hz, respectively; VII-High-speed handpiece (control). Cavities were restored and the restorations were polished. The slabs were fixed to intra-oral appliances, worn by 13 volunteers for 14 days. Sucrose solution was applied to each slab six times per day. Samples were removed, cleaned, sectioned and ground to polarized light microscopic analysis. Demineralized area and inhibition zone width were quantitatively assessed. Presence or absence of cracks was also analyzed. Scores for demineralization and inhibition zone were determined. RESULTS:No difference was found among the groups with regard to demineralized area, inhibition zone width, presence or absence of cracks, and demineralization score. Inhibition zone score showed difference among the groups. There was a correlation between the quantitative measures and the scores. CONCLUSION:Er:YAG laser was similar to high-speed handpiece, with regard to alterations in enamel adjacent to restorations submitted to cariogenic challenge in situ. The inhibition zone score might suggest less demineralization at the restoration margin of the irradiated substrates. Correlation between the quantitative measures and scores indicates that score was, in this case, a suitable complementary method for assessment of caries lesion around restorations, under polarized light microscopy.


Lasers Surg Med


Chimello DT,Serra MC,Rodrigues AL Jr,Pécora JD,Corona SA




Has Abstract


2008-11-01 00:00:00












  • Light-based home-use devices for hair removal: Why do they work and how effective they are?

    abstract:OBJECTIVES:This review has the following objectives: Firstly, it provides an explanation of the evolution of laser/intense pulsed light (IPL) hair reduction modalities from high fluence professional devices to low fluence home-use appliances. Secondly, it summarises published literature reviews on home-use devices (HUD...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章,评审


    authors: Town G,Botchkareva NV,Uzunbajakava NE,Nuijs T,van Vlimmeren M,Ash C,Dierickx C

    更新日期:2019-08-01 00:00:00

  • Effect of an Er:YAG laser on periodontally involved root surfaces: an in vivo and in vitro SEM comparison.

    abstract:BACKGROUND AND OBJECTIVE:The recently introduced Er:YAG laser seems to be a promising alternative in periodontal treatment due to its thermo-mechanical ablation mechanism. The present study attempted to compare the effects of an Er:YAG laser on periodontally involved root surfaces at different power settings in vivo an...

    journal_title:Lasers in surgery and medicine

    pub_type: 临床试验,杂志文章


    authors: Schwarz F,Pütz N,Georg T,Reich E

    更新日期:2001-01-01 00:00:00

  • Phototoxic effect of photodynamic therapy on lung cancer cells grown as a monolayer and three dimensional multicellular spheroids.

    abstract:BACKGROUND AND OBJECTIVE:Photodynamic therapy (PDT) is a minimally invasive therapeutic modality for the treatment of neoplastic and non-neoplastic diseases. The photochemical interaction of light, photosensitizer (PS) and molecular oxygen produces singlet oxygen which induces cell death. The effectiveness of zinc sulf...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Manoto SL,Houreld NN,Abrahamse H

    更新日期:2013-03-01 00:00:00

  • Nd:YAG laser followed by radiation for treatment of malignant airway lesions.

    abstract::Patients with malignant obstructive airway lesions often present with total or segmental atelectasis of lung. In spite of prompt initiation of palliative external radiation alone, some patients were unable to complete the planned course of radiation therapy. Since May 1983, 17 patients with malignant obstructive endob...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Jain PR,Dedhia HV,Lapp NL,Thompson AB,Frich JC Jr

    更新日期:1985-01-01 00:00:00

  • Argon laser iridotomy in primary angle-closure or pupillary block glaucoma.

    abstract::This paper describes the use of a pulsed argon laser to perform iridotomies in 87 patients. Diagnosis include: primary angle closure glaucoma, narrow angle in the fellow eye of patients with primary angle glaucoma, pupillary block, and after incomplete surgical iridectomies. Laser iridotomy was achieved in 79% of pati...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Schwartz LW,Spaeth GL

    更新日期:1980-01-01 00:00:00

  • Laser treatments on skin enhancing and controlling transdermal delivery of 5-fluorouracil.

    abstract:BACKGROUND AND OBJECTIVE:Laser ablation of stratum corneum (SC) enhances transdermal delivery of hydrophilic drugs. The influence of the infrared (IR) (lambda = 1,064 nm), visible (lambda = 532 nm), and ultraviolet (UV) (lambda = 355 nm) radiations of a Nd:YAG laser on transdermal delivery of 5-Fluorouracil (5-Fu) acro...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Gómez C,Costela A,García-Moreno I,Llanes F,Teijón JM,Blanco D

    更新日期:2008-01-01 00:00:00

  • Light emitting diode irradiation protect against the amyloid beta 25-35 induced apoptosis of PC12 cell in vitro.

    abstract:BACKGROUND AND OBJECTIVES:Whether light emitting diode (LED) irradiation has effects on "beta-amyloid (A beta) induced apoptosis," a leading hypothesis of the cause of Alzheimer's disease (AD), or not? STUDY DESIGN/MATERIALS AND METHODS:Monolayer cell cultures of PC12 were subjected to A beta or/and LED irradiation at...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Duan R,Zhu L,Liu TC,Li Y,Liu J,Jiao J,Xu X,Yao L,Liu S

    更新日期:2003-01-01 00:00:00

  • Pc 4 photodynamic therapy of U87-derived human glioma in the nude rat.

    abstract:BACKGROUND AND OBJECTIVES:As a potential therapy for malignant glioma, we tested the phthalocyanine photosensitizer Pc 4 for: (1) rapid clearance from the vasculature, (2) specificity for glioma, and (3) tumoricidal photosensitizing capability. STUDY DESIGN/MATERIALS AND METHODS:Parenchymal injection of U87 cells into...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: George JE 3rd,Ahmad Y,Varghai D,Li X,Berlin J,Jackowe D,Jungermann M,Wolfe MS,Lilge L,Totonchi A,Morris RL,Peterson A,Lust WD,Kenney ME,Hoppel CL,Sun J,Oleinick NL,Dean D

    更新日期:2005-06-01 00:00:00

  • Intradermally focused infrared laser pulses: thermal effects at defined tissue depths.

    abstract:BACKGROUND AND OBJECTIVES:To produce controlled, spatially confined thermal effects in dermis. STUDY DESIGNS/MATERIALS AND METHODS:A 1 W, 1,500 nm fiber-coupled diode laser was focused with a high numerical aperture (NA) objective to achieve a tight optical focus within the upper dermis of skin held in contact with a ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Khan MH,Sink RK,Manstein D,Eimerl D,Anderson RR

    更新日期:2005-04-01 00:00:00

  • Laser-assisted removal of a foreign body impacted in the esophagus.

    abstract:BACKGROUND AND OBJECTIVE:We reported the use of Holmium-YAG laser in the management of a foreign body impacted in the esophagus. STUDY DESIGN/PATIENTS AND METHODS:Esophagoscopy was performed on a man with a denture impacted in the esophagus. The denture was disimpacted into the stomach and fractured with Holmium-YAG l...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Lam YH,Ng EK,Chung SC,Li AK

    更新日期:1997-01-01 00:00:00

  • A light emitting diode (LED) based spatial frequency domain imaging system for optimization of photodynamic therapy of nonmelanoma skin cancer: quantitative reflectance imaging.

    abstract:BACKGROUND:Photodynamic therapy (PDT) offers the potential for enhanced treatment of nonmelanoma skin cancer (NMSC) with minimal scarring. Yet, PDT has not achieved consistent long term effectiveness to gain widespread clinical acceptance for treatment of skin cancer. Therapeutic response varies between practitioners, ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Saager RB,Cuccia DJ,Saggese S,Kelly KM,Durkin AJ

    更新日期:2013-04-01 00:00:00

  • Low-level laser therapy (LLLT) prevents oxidative stress and reduces fibrosis in rat traumatized Achilles tendon.

    abstract:BACKGROUND AND OBJECTIVES:The present study investigated the effects of low-level laser therapy (LLLT) on oxidative stress and fibrosis in an experimental model of Achilles tendon injury induced by a single impact trauma. STUDY DESIGN/MATERIALS AND METHODS:Male Wistar rats were randomly divided into four groups (n = 8...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Fillipin LI,Mauriz JL,Vedovelli K,Moreira AJ,Zettler CG,Lech O,Marroni NP,González-Gallego J

    更新日期:2005-10-01 00:00:00

  • Gas volume quantitation during argon ion laser ablation of atheromatous aorta in blood and 0.9% saline media with an optically shielded catheter.

    abstract::Using an optically shielded fiber optic laser catheter, the amount of gas produced when firing an argon ion laser into 0.9% saline solution or blood alone and into atheromatous aorta in either a blood or 0.9% saline medium was quantitated. Energies from 0.25 to 4 joules (J) were used at powers of 2, 5, and 8 W. We fou...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Davis GS,Bott-Silverman C,Goormastic M,Gerrity RG,Kittrell C,Feld M,Kramer JR

    更新日期:1988-01-01 00:00:00

  • The effect of irrigation on peak temperatures in nerve root, dura, and intervertebral disc during laser-assisted foraminoplasty.

    abstract:BACKGROUND AND OBJECTIVE:The Holmium: YAG (Ho: YAG) laser has been used for the ablation of prolapsed discs but alternative techniques are available, and this application remains controversial. It also has potential for the decompression of nerve roots within narrowed foraminae with the technique of endoscopic laser fo...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Hafez MI,Zhou S,Coombs RR,McCarthy ID

    更新日期:2001-01-01 00:00:00

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    abstract::Histological investigation of the dog's myocardium performed 7 and 25 days after irradiation with different doses of Nd-YAG laser show that the damage zone has the shape of a hollow sphere with minor changes in cardiomyocytes in the central part of the sphere. The small blood vessels in the irradiated zone remained un...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Obelienius V,Knepa A,Lubite Y,Ambartzumian R,Isakov V,Koshelev E,Markin E

    更新日期:1985-01-01 00:00:00

  • High Diagnostic Accuracy of Visible 5-ALA Fluorescence in Meningioma Surgery According to Histopathological Analysis of Tumor Bulk and Peritumoral Tissue.

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Wadiura LI,Millesi M,Makolli J,Wais J,Kiesel B,Mischkulnig M,Mercea PA,Roetzer T,Knosp E,Rössler K,Widhalm G

    更新日期:2020-07-01 00:00:00

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    abstract::CO2, Nd:YAG, and argon lasers have been used for 5 years for experimental and clinical procedures at the National Cancer Institute of Milan under the auspices of the National Research Council. Experimental data regarding tumor cell spread through lymphatic and hematic channels and cell viability in the fumes after CO2...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Emanuelli H,Bandieramonte G,Marchesini R,Fava G,Rodari A,Colombo MP,Costa A,Spinelli P,Zunino F,Chiesa F,Cascinelli N,Andreola S,Pariente R,Canti GF

    更新日期:1983-01-01 00:00:00

  • Combination with genistein enhances the efficacy of photodynamic therapy against human anaplastic thyroid cancer cells.

    abstract:BACKGROUND AND OBJECTIVE:Photodynamic therapy (PDT) has become one of the emerging options in management of cancer and other diseases. The major goal of PDT is to kill cancer cell without causing any adverse effect to the normal cells. PDT in combination of different therapeutic agents is being evaluated to improve the...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Ahn JC,Biswas R,Chung PS

    更新日期:2012-12-01 00:00:00

  • Microprocessor-controlled Nd:YAG laser for hyperthermia induction in the RIF-1 tumor.

    abstract::Near-infrared radiation from a Nd:YAG laser at 1,064 nm was used interstitially or superficially to induce hyperthermia in RIF-1 tumors in C3H male mice. A single 600-microns quartz fiber with a 0.5-cm cylindrical diffusor or a weakly diverging microlens at its distal end was used to deliver laser energy to tumors in ...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Waldow SM,Russell GE,Wallner PE

    更新日期:1992-01-01 00:00:00

  • Effect of the CO2 milliwatt laser on tensile strength of microsutures.

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Menovsky T,Beek JF,van Gemert MJ

    更新日期:1997-01-01 00:00:00

  • Prevention of acute radiodermatitis by photobiomodulation: A randomized, placebo-controlled trial in breast cancer patients (TRANSDERMIS trial).

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Robijns J,Censabella S,Claes S,Pannekoeke L,Bussé L,Colson D,Kaminski I,Bulens P,Maes A,Noé L,Brosens M,Timmermans A,Lambrichts I,Somers V,Mebis J

    更新日期:2018-02-10 00:00:00

  • Morphological analysis of cementum and root dentin after Er:YAG laser irradiation.

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Sasaki KM,Aoki A,Ichinose S,Ishikawa I

    更新日期:2002-01-01 00:00:00

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Altshuler GB,Anderson RR,Manstein D,Zenzie HH,Smirnov MZ

    更新日期:2001-01-01 00:00:00

  • Beneficial effects of early treatment of infantile hemangiomas with a long-pulse Alexandrite laser.

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Su W,Ke Y,Xue J

    更新日期:2014-03-01 00:00:00

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    abstract::Percutaneous endoscopic approaches to cholelithiasis would be facilitated by methods for welding gallbladder tissues. We evaluated the bursting pressure and histologic appearance of canine gallbladder tissue welded with a thulium-holmium-chromium:YAG (THC:YAG) laser producing a 2.15 microns pulsed output. The tissue a...

    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Popp HW,Oz MC,Bass LS,Chuck RS,Trokel SL,Treat MR

    更新日期:1989-01-01 00:00:00

  • A first trial in the clinical application of photodynamic therapy for the prevention of restenosis after coronary-stent placement.

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Usui M,Miyagi M,Fukasawa S,Hara T,Ueyama N,Nakajima H,Takata R,Sasame A,Tamura K,Naitou Y,Yamashina A

    更新日期:2004-01-01 00:00:00

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Walker NP,Matthews J,Newsom SW

    更新日期:1986-01-01 00:00:00

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Liu G,Jia W,Nelson JS,Chen Z

    更新日期:2013-12-01 00:00:00

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章,随机对照试验


    authors: Leal Junior EC,Lopes-Martins RA,Rossi RP,De Marchi T,Baroni BM,de Godoi V,Marcos RL,Ramos L,Bjordal JM

    更新日期:2009-10-01 00:00:00

  • CO2 laser-resurfacing: increased risk of side effects after uv-exposure-an experimental animal study.

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    journal_title:Lasers in surgery and medicine

    pub_type: 杂志文章


    authors: Hedelund L,Haedersdal M,Egekvist H,Heidenheim M,Hans CW,Poulsen T

    更新日期:2005-02-01 00:00:00