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Search Results: 1 - 10 of 189791 matches for " Montebugnoli G "
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Different corrosive effects on hydroxyapatite nanocrystals and amine fluoride-based mouthwashes on dental titanium brackets: a comparative in vitro study
Lelli M, Marchisio O, Foltran I, Genovesi A, Montebugnoli G, Marcaccio M, Covani U, Roveri N
International Journal of Nanomedicine , 2013, DOI: http://dx.doi.org/10.2147/IJN.S35245
Abstract: ent corrosive effects on hydroxyapatite nanocrystals and amine fluoride-based mouthwashes on dental titanium brackets: a comparative in vitro study Original Research (563) Total Article Views Authors: Lelli M, Marchisio O, Foltran I, Genovesi A, Montebugnoli G, Marcaccio M, Covani U, Roveri N Published Date January 2013 Volume 2013:8 Pages 307 - 314 DOI: http://dx.doi.org/10.2147/IJN.S35245 Received: 21 June 2012 Accepted: 17 August 2012 Published: 18 January 2013 Marco Lelli,1 Olivia Marchisio,2 Ismaela Foltran,1 Annamaria Genovesi,2 Giulia Montebugnoli,1 Massimo Marcaccio,1 Ugo Covani,2 Norberto Roveri1 1Alma Mater Studiorum, University of Bologna, Department of Chemistry, Bologna, Italy; 2University of Pisa, Istituto Stomatologico Tirreno, Lido di Camaiore, Lucca, Italy Abstract: Titanium plates treated in vitro with a mouthwash containing amine fluoride (100 ppm F-) and another containing zinc-substituted carbonate–hydroxyapatite have been analyzed by scanning electron microscopy and atomic force microscopy to evaluate the modification of the surface roughness induced by treatment with these two different mouthwashes. The treatment with F--based mouthwash produces a roughness characterized by higher peaks and deeper valleys in the streaks on the titanium bracket surface compared with those observed in the reference polished titanium plates. This effect causes a mechanical weakness in the metallic dental implant causing bacterial growth and therefore promotes infection and prosthesis contamination. However, the in vitro treatment with a mouthwash containing zinc-substituted carbonate–hydroxyapatite reduced the surface roughness by filling the streaks with an apatitic phase. This treatment counteracts the surface oxidative process that can affect the mechanical behavior of the titanium dental implant, which inhibits the bacterial growth contaminating prostheses.
A new chemical formulation for control of dental unit water line contamination: An 'in vitro' and clinical 'study'
Lucio Montebugnoli, Giovanni Dolci
BMC Oral Health , 2002, DOI: 10.1186/1472-6831-2-1
Abstract: Six old dental units equipped with a device designed to automatically flush disinfecting solutions through the water system (Castellini Autosteril) were selected. Water samples from DUWL effluents were collected in each dental unit for 10 randomly selected days, before and after a 5 minute DUWL disinfecting cycle with TetraAcetylEthileneDiamine (TAED) and persalt (Ster4spray produced by Farmec spa, and distributed by Castellini spa). Water samples were plated in R2A Agar and cultured at room temperature for 7 days, and the total number of heterotrophic microorganisms counted and expressed in Log10 CFU/mL A general linear model was fitted and multiple regression ANOVA for repeated measures was used for the statistical analysis.The mean contamination in DUWL effluent at baseline was 5.45 ± 0.35 CFU/mL (range 4.79 to 5.93 CFU/mL). When water samples were tested "in vitro" against the chemical, no growth of heterotrophic bacteria was detected after a 5 minute contact in any of the water samples tested. After undergoing a 5 minute disinfecting cycle with the chemical, DUWL mean contamination in water effluents was 2.01 ± 0.32 CFU/mL (range 1.30 to 2.74 CFU/mL) (significant difference with respect to baseline).An inbetween patient disinfecting procedure consisting of flushing DUWL with TAED and persalt equivalent to 0.26% peracetic acid could be useful in routine dental practice for cross-contamination control.It has been known for more than 30 years that water delivered by dental units during routine dental practice is highly contaminated by numerous species of pathogen and non-pathogen microorganisms which enter dental units retracted up from the oral cavity of patients undergoing dental treatment or delivered by incoming municipal water, the so called heterotrophic bacteria [1-3]. Inside dental units, heterotrophic bacteria persist in DUWLs growing as a multispecie biofilm on the inner surface and continuously supplying dental unit water system. In 1996 American Dental
Laugier-Hunziker Syndrome: An Uncommon Cause of Oral Pigmentation and a Review of the Literature
Lucio Montebugnoli,Ivana Grelli,Fabio Cervellati,Cosimo Misciali,Beatrice Raone
International Journal of Dentistry , 2010, DOI: 10.1155/2010/525404
Abstract: Laugier-Hunziker syndrome is a rare benign condition characterized by diffuse oral hyperpigmentation associated with pigmentation of the nails. The syndrome must be included in the differential diagnosis of diffuse oral pigmentation to exclude other conditions with systemic implications. We describe a 43-year-old white woman with the clinical and histological features of Laugier-Hunziker syndrome associated with toenail pigmentation. The correct clinical identification avoids the need for detailed investigations and treatment. We also review the potential causes of oral pigmentation. 1. Introduction Pigmentation is frequently encountered in the oral mucosa. Focal lesions usually need an in-depth examination to exclude a melanoma, while diffuse lesions often have no specific histological features and do not generate prognostic perplexity. However, diagnosis of these lesions is important because they could be a sign of diseases with systemic implications such as Peutz-Jeghers syndrome or adrenal insufficiency [1]. Laugier-Hunziker syndrome is a rare acquired macular hyperpigmentation of oral mucosa and lips frequently associated with longitudinal pigmentation of the nails [2]. The pathogenesis is unknown, but no systemic involvement or malignant predisposition has been described, so the correct clinical identification avoids the need for detailed and potentially hazardous investigations and treatment [3]. Few cases have been reported, and almost all have been published in the dermatological literature [4, 5]. Here we describe a patient with diffuse oral pigmentation associated with a toenail longitudinal pigmented band in which the diagnosis of Laugier-Hunziker pigmentation (Laugier-Hunziker syndrome) was made on the basis of clinical and histological findings. 2. Case Report A 43-year-old white woman was referred to the Department of Oral Sciences of University of Bologna for the evaluation of pigmented oral and labial lesions. The patient had noted such pigmentation but was unable to pinpoint the period of onset. Oral mucosa was completely symptom free and the patient was in a good health; she did not use drugs regularly and did not smoke. There was no family history of abnormal pigmentations of the skin or oral mucosa. Clinical examination disclosed diffuse macular brown pigmentation on the vermilion of the lower lip and oral mucosa on both cheeks (Figures 1 and 2). There was no pigmentation on the gingiva or tongue. The patient referred to longitudinal pigmentation on the fingernails, but it was not visible at clinical examination because of nail
Clinical use of parnaparin in major and minor orthopedic sugery: a review
Stefano Bugamelli,Elena Zangheri,Milena Montebugnoli,Lucia Guerra
Vascular Health and Risk Management , 2008,
Abstract: Stefano Bugamelli1, Elena Zangheri2, Milena Montebugnoli1, Lucia Guerra31Servizio di Anestesia e Rianimazione, IRCCS Istituti Ortopedici Rizzoli, Bologna, Italy; 2Unità Operativa di Anestesia e Terapia Intensiva Postoperatoria Prof. G. Di Nino, Policlinico Sant’Orsola Malpighi, Bologna, Italy; 3Medical Department Alfa Wassermann, Bologna, ItalyAbstract: Patients undergoing arthroplasty or other orthopedic surgery show a high risk of venous thromboembolism (VTE), involving mortality, morbidity, and social costs; however, the risk for VTE in minor orthopedic surgery should not be underestimated and antithrombotic prophylaxis may be required. According to the literature, low-molecular-weight heparins (LMWHs) are more effective in preventing VTE than unfractionated heparins (UFHs) or vitamin K antagonists, and have a lower hemorrhagic risk. By comparing different prophylactic regimens, it has been shown that starting the prophylaxis near the time of the operation is the most critical point for efficacy, whether or not the first dose is administered pre- or post-operatively. Moreover, most thromboembolic complications are observed after discharge and, therefore, many clinicians advocate continuing prophylaxis for longer times (6–8 weeks) in order to further reduce the rate for VTE. The literature on parnaparin, a new LMWH, in VTE prophylaxis was reviewed. Parnaparin is equally effective as UFH, but it offers the advantages of a once-daily administration and improved tolerability, thus allowing the home management of patients with no need for laboratory coagulation tests.Keywords: orthopedic surgery, low molecular weight heparins, antithromboembolic prophylaxis, parnaparin
A Characterization of the Members of a Subfamily of Power Series Distributions  [PDF]
G. Nanjundan
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.26099
Abstract: This paper discusses a characterization of the members of a subfamily of power series distributions when their probability generating functions satisfy the functional equation where a, b and c are constants and is the derivative of f.
Double Negative Left-Handed Metamaterials for Miniaturization of Rectangular Microstrip Antenna  [PDF]
G. Singh
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.26044
Abstract: In this paper, I have explored a significant concept for the miniaturization of microstrip patch antenna configuration by using the double negative (DNG) left-handed Metamaterials, which have dielectric permittivity and magnetic permeability both negative, simultaneously. It is achieved through the concept of phase-compensation by thin slab consist of the double positive (DPS) material, which have dielectric permittivity and magnetic permeability both positive, simultaneously and DNG metamaterials as a substrate of the microstrip patch antenna. By combining the DNG metamaterial slab with the slab made of DPS materials form a cavity resonator whose dispersion relation is independent of the sum of thickness of the slabs filling this cavity but it depends on the ratio of their thicknesses. This cavity constitutes by DPS and DNG material is used as substrate of the microstrip antennas and the DNG material slab is behave as phase compensator.
Dynamic and Configurational Approach to the Glass Transition by Nanoscale Cooperativity  [PDF]
G. Romeo
Open Journal of Biophysics (OJBIPHY) , 2012, DOI: 10.4236/ojbiphy.2012.23012
Abstract: Here we examine the findings obtained for disaccharide/water mixtures near glass transition that involves cooperative relaxation features on kinetic by viscosity and on thermodynamic behaviour by neutron scattering. Then to address cooperative phenomena that mitigate the Debye-Waller behaviour we invoke Adam-Gibbs’ idea of a cooperative rearranging region. Neutron results suggest that the excess mean square displacement behaves as free volume and is closely connected to an elementary step of the structural relaxation. Then viscosity data evidence a breakdown of the Einstein-Debye relation, decoupling attributed to the intermolecular cooperativity.
Confidence Level Estimator of Cosmological Parameters  [PDF]
G. Sironi
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.329157
Abstract: Cosmological Models frequently suggest the existence of physical, quantities, e.g. dark energy, we cannot yet observe and measure directly. Their values are obtained indirectly setting them equal to values and accuracy of the associated model parameters which best fit model and observation. Apparently results are so accurate that some researchers speak of precision cosmology. The accuracy attributed to these indirect values of the physical quantities however does not include the uncertainty of the model used to get them. We suggest a Confidence Level Estimator to be attached to these indirect measurements and apply it to current cosmological models.
Mitochondrial DNA sequence analysis in Anabantoidei fish  [PDF]
G. Degani
Advances in Biological Chemistry (ABC) , 2013, DOI: 10.4236/abc.2013.33039

The decline of ornamental fish populations in their native habitats due to over-fishing has brought about the development of ornamental fish aquaculture, to which fish of the Anabantoidei suborder are important contributors. The genetic variations among species of this suborder were examined by mitochondrial gene sequencing analysis using the cytochrome b and 12S genes. According to the cytochrome b gene, the most similar strains were Trichogaster trichopterus (gold) and Trichogaster trichopterus (blue) (100%). Trichogaster leerii was less similar to them (86.0%), and an even lower similarity was found between the species T. trichopterus and Trichogaster labiosus (85.6%). The least similarity was observed between Betta betta and the genera Colisa (50.2%) and Trichogaster (60.1%). The phylogenetic trees of 12S and cytochrome b were very similar. According to 12S, the similarity between Trichogaster species was high (91.4% - 100%), and between species of this genus and Colisa lalia, it was lower (88.4%). In conclusion, sequence analyses, based on cytochrome

Estimation of Parameter in a New Truncated Distribution  [PDF]
G. Nanjundan
Open Journal of Statistics (OJS) , 2013, DOI: 10.4236/ojs.2013.34025
Abstract: This paper discusses the estimation of the parameter in a truncated form of a discrete distribution which is analogous to Burr distribution. The maximum likelihood and the moment estimators of the parameter are obtained. Their asymptotic properties are also established.
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