1,721,103 research outputs found
SCLERODERMA-ASSOCIATED SYNDROME: ORAL MANIFESTATIONS
No full textIntroduction: The authors propose to evaluate the existence of a correlation between Sjogren’s syndrome and progressive systemic sclerosis, and to describe oral manifest- ations of scleroderma- associated syndrome.
Material and methods: 24 patients with progressive systemic sclerosis were examined: 22 women and 2 men. All the patients examined met the diagnostic criteria for progressive systemic sclerosis. A diagnosis of Sjogren’s syndrome was made based on a positive histological examination of biopsy specimens of the accessory salivary glands of the lower lip, associated with dry keratoconjunctivitis and/or xerostomia, and the detection of serum autoantibody. Each patient underwent a careful clinical testing based on: observation of oral soft tissue alteration; evaluation of possible xerostomia and correlation with Sjogren’s syndrome; evaluation of possible microstomia; evaluation of possible Candida infections; evaluation of possible oral mucous sores in patients wearing prostheses; DMFS evaluation; evaluation of periodontal health by means of uletic bleeding index; evaluation of bone absorption state; laboratory tests.
Results: The research showed that Sjogren’s syndrome was present in 20.8% of patients afflicted by progressive systemic sclerosis (SSc). The patients who suffered from SSc-associated Sjogren Syndrome had a higher rate of oral manifestations. In particular, there was a higher rate of caries and paradental disease in patients who suffered from associated syndromes compared to patients who suffered exclusively from progressive systemic sclerosis.
Conclusion: The observed results confirm the existence of a correlation between the two pathologies and that scleroderma-associated syndrome is a peculiar disease that can afflict oral health. Our findings underline that oral manifestations are significantly manifest in SSc-associated Sjogren Syndrome
Color and photography in the restorative dentistry. A brief communication about color temperature, dental color and the use of light and photography in dental practice
No full textRelevance. Optical properties of dental tissues can be captured by photography, considering the characteristics of the light sources. Therefore photography might become a way to communicate the color and the characterizing aspects of the teeth, reducing the misunderstandings between the dental practice and the laboratory in the project of dental restoration. Purpose. To illustrate some ways of using the current photographic technology to document teeth color correctly, and to be able to communicate it without misunderstandings and to replicate it in a simple way. Materials and methods. The photographs were taken using Nikon D500 digital camera, Nikkor 60 mm 2.8 macro lens, Nikon SB-700 Speedlight flash, natural light diffuser and a reflector panel. Results. Correct precautions in execution of the photographs make it possible to obtain more realistic images and to limit defects in the perception of color, due to the incorrect use of the light sources. Conclusions. Well executed photograph makes it possible to obtain high quality images that can be evaluated in the project of a restoration and in the communication of teeth color and shade, and repeatable color evaluations, although the exact rendering of the color in digital images still has a slight discrepancy between images and natural objects. The visual method is more subject to variables instead. Keywords: Tooth color, tooth shade, photography, photographs, spectrophotometer
Diabetic Microagiopathy of Oral Mucosa Depends on Disease Duration and Therapy
Full text linkBackground: Diabetes mellitus is a chronic degenerative systemic disease whose prevalence is increasing. This paper aims
to evaluate the effects of diabetic microangiopathy, depending on its duration and the type of treatment administered,
by using polarized light videocapillaroscopy of the oral mucosa.
Material/Methods: We enrolled 120 subjects: 60 healthy subjects and 60 patients with diabetes mellitus. In turn, patients were
divided into 3 subgroups according to the type of diabetes, the duration of the disease, and the type of treatment
administered. A videocapillaroscopic examination of the oral mucosa was carried out on the diabetic and
healthy subjects.
Results: Changes in microcirculation were detected in diabetic patients: at the level of the labial, buccal, and lingual
mucosa, the density of the loops is on average reduced; there is an increase in the length and the total diameter
of the loops, while the average density of the periodontal capillaries is much higher. The most significant
changes were noted in patients who had had type 1 diabetes for more than 10 years and had received insulin
therapy.
Conclusions: This study, performed using polarized light videocapillaroscopy, which for the first time was used to analyze
the capillaries of the oral mucosa in patients with diabetes, confirms the presence of changes that are instrumentally
“objectifiable” and “quantifiable” through the videocapillaroscopic technique. Videocapillaroscopy
can be a reliable method in the study and monitoring of complications in patients with type 1 and 2 diabetes
mellitus
A simple method to identify implant sites in totally edentulous arches: a pilot study with thermo-printed templates used with cone beam computed tomography
No full textBackground: All dental implants must be placed following radiological, clinical and aesthetic indications in compliance with prosthetic principles avoiding iatrogenic damage to patients. In implantology, among the key choices, to obtain predictable results, it is essential to establish (by cone beam computed tomography [CBCT]) the sites where to insert the implants; these sites must be identified, during the surgical phase, in the oral cavity. Surgical guides represent a valid aid especially in complex cases that require multiple implants. For some clinical conditions, expert operators choose the free hand technique during which identifying the chosen implant sites on CBCT in the oral cavity is more difficult. Methods: This experimental study is based on the use of thermo-molded mask as an alternative to surgical guides when the freehand technique is adopted in totally edentulous patients. These innovative masks, containing radiopaque references, are initially worn by patients during the execution of the CBCT, and later during surgery to identify the implant sites in the oral cavity. Results: The procedure described proved to be very useful and able to increase the precision of the freehand technique even if it does not provide information on the inclination of the implants. The metal references help clinical identification of the implant site. Conclusions: Our thermo-molded masks, in particular clinical conditions, could represent a valid and economical alternative to the classic surgical guide. The described procedure does not increase costs for the patient and significantly increases the precision in inserting the implants during free-hand techniques
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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