1,720,956 research outputs found
Impact of adhesive layer addition on the optical properties of remineralized white spot lesions
Full text linkBackground. The present in vitro study evaluated the camouflage effect of two treatments
for white spot lesions (WSLs): remineralization with Mi Paste Plus© (GC Europe N.V.) and
remineralization combined with a Scotchbond Multi-Purpose© (3M ESPE 2015) adhesive layer.
Additionally, the study assessed the color stability of the treatments when exposed to a staining
agent, such as coffee.
Methods. Sixty extracted anterior and posterior teeth were preserved in saline solution and
divided into two groups. Artificial WSLs were created using 37% orthophosphoric acid for 1
minute. Both groups underwent daily 6-hour remineralization treatments with Mi Paste Plus©
for 14 days. In the second group, a thin adhesive layer was applied after remineralization. Color
analysis was performed using an MHT SpectroShade Micro spectrophotometer at baseline (T1),
after remineralization (T2), after adhesive application for group 2 (TR), and after immersion in
coffee for 24 hours (T3). Color differences (ΔE) between healthy tissue and WSLs were assessed,
with ΔE ≤ 3.3 considered clinically acceptable. Data were analyzed using STATA 17 (P ≤ 0.05).
Results. ΔE analysis showed a statistically significant improvement in the camouflage effect in the
adhesive-treated group (TR) compared to remineralization alone (T2). After coffee exposure (T3),
ΔE values increased significantly in both groups, with higher values observed in the adhesive-
treated group. Intragroup analyses indicated significant differences between T2 and T3, as well
as TR and T3.
Conclusion. The application of an adhesive system can be considered a valid option to improve
the aesthetic outcome of a remineralization treatment; however, this approach carries the risk of
resin staining over time
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
Clinical performance of the pseudo-non diffracting beam Toric EDOF intraocular lens: visual function, rotational stability, and quality of life
No full textPurpose: To evaluate visual acuity, refractive outcomes, rotational stability, and patient-reported satisfaction 3 months after bilateral implantation of the Lucidis Toric extended-depth-of-focus (EDOF) intraocular lens in cataract patients with 1.00-3.00 D of regular corneal astigmatism. Methods: Prospective, single-arm study of 25 patients (50 eyes) undergoing phacoemulsification with bilateral Lucidis Toric IOL implantation. The primary endpoint was binocular uncorrected distance visual acuity (UDVA) at 3 months. Secondary endpoints included monocular/binocular UDVA, distance-corrected VA (DCVA) at 4 m; intermediate (80 cm, 66 cm) and near (40 cm) uncorrected and distance-corrected acuities; defocus curve; residual spherical equivalent (SE) and cylinder; IOL rotation; optical quality (MTF cutoff, Strehl ratio, HOA RMS); contrast sensitivity; halometry; and NEI-RQL-42. Paired t-tests or Mann-Whitney tests compared pre-/postoperative values. Results: At 3 months, the mean postoperative spherical equivalent was 0.17 ± 0.52 D (median 0.00 D; range -0.75 to +0.75 D) and the mean refractive cylinder was 0.04 ± 0.32 D (median 0.00 D; range -0.50 to +0.50 D). Median IOL rotation was 2.1 ± 2.3 degrees, with no eyes requiring repositioning. Mean binocular UDVA, UI80VA, UI66VA and UNVA were -0.01 ± 0.1, 0.08 ± 0.24, 0.04 ± 0.1, and 0.01 ± 0.14 logMAR, respectively. There were no statistically significant differences between uncorrected and distance-corrected visual acuities at any distance. The binocular defocus curve showed visual acuity better than 0.1 logMAR from +0.50 D to -3.00 D. NEI-RQL-42 scores indicated high patient satisfaction, particularly in clarity of vision, far, near vision, activity limitations, and glare domains. Conclusion: Bilateral Lucidis Toric EDOF IOL implantation delivers stable rotational performance, broad-range uncorrected vision, and high spectacle independence in astigmatic cataract patients. Future randomised, head-to-head trials with longer follow-up are warranted
Esthetic smile rehabilitation with direct composite veneers: a narrative review with a practical explanation of the technique
No full text: Social relationships, self-esteem, and one's own view are all greatly impacted by smile aesthetics. Smile harmony can be upset by abnormalities like peg-shaped lateral incisors, which leads patients to look for the least invasive yet effective cosmetic procedures. Direct composite veneers are a conservative way to improve your appearance without requiring a lot of dental preparation. This research investigates clinical application, material improvements, and overall patient satisfaction of direct composite veneers in the context of esthetic smile rehabilitation. The outcomes of recent research on direct composite veneers, with an emphasis on minimally invasive cosmetic rehabilitation methods, are summarized in this narrative overview of the literature. Through extensive searches in PubMed, Scopus, and ScienceDirect, studies were chosen using keywords like "direct composite veneers," "esthetic restoration," and "minimally invasive dentistry." The inclusion of articles was determined by their applicability to patient satisfaction, clinical results, and composite material improvements. According to the review, direct composite veneers are a practical, affordable, and reversible substitute for porcelain veneers. Benefits include instant results, little tooth preparation, and the use of multilayer composite procedures to provide natural-looking results. Nevertheless, drawbacks like staining vulnerability, decreased durability, and upkeep needs highlight the necessity of cautious patient selection. Direct composite veneers are becoming more and more feasible for long-term aesthetic solutions because to recent developments in composite resins, such as nanohybrid and nanofilled technologies, which have improved their polishability, durability, and color stability. Direct composite veneers are a good choice for those looking for a customizable, minimally intrusive method of improving the appearance of their smiles. Composite veneers are a useful and versatile option for improving appearance, even though they could need upkeep over time. To increase their lifetime and expand their use in cosmetic dentistry, more study on material advancements is necessary
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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