1,720,988 research outputs found
Impact of prosthetic material on mid- and long-term outcome of dental implants supporting single crowns and fixed partial dentures: A systematic review and meta-analysis.
No full textAIM
The impact of prosthetic material selection on implant survival is not clear. The current criteria for choosing a prosthetic material seem to be based on clinician preferences. This systematic review aims to evaluate the impact of restorative materials on the mid- and long-term survival of implants supporting single crowns and fixed partial dentures.
MATERIALS AND METHODS
Hand and MEDLINE searches were performed to identify relevant literature for single crowns (SC) and fixed partial dentures (FPD). Further inclusion criteria were a mean follow-up period of at least 3 years, the inclusion of at least 10 patients in a relevant study cohort, and a clear description of prosthesis type and prosthetic material.
RESULTS
A total of 63 studies for the SC group and 11 studies for the FPD group were included. Full arch restorations were not included. The materials utilised in the SC group were metal-ceramic (precious and non-precious), lithium-disilicate, veneered zirconia, veneered alumina, and nanoceramics. The materials used in the FPD group were metal-ceramic (precious), veneered titanium, metal-resin (precious), and veneered zirconia. No significant impact on the prosthetic material relating to mid- or long-term implant survival was identified. Furthermore, there were no statistically significant differences between the survival rates of the dental prostheses made from different materials (SC and FPD group). Single crowns made of nanoceramics showed a higher risk for decementation relative to other materials (0.80, 95% CI [0.67; 0.89]; P < 0.0001), whereas metal-resin FPDs showed a higher risk for chipping (0.36, 95% CI [0.23; 0.52]; P = 0.0072).
CONCLUSION
The current evidence suggests that prosthetic material selection has no influence on mid- and long-term survival of implants restored with single crowns and fixed partial dentures. Similarly, the prosthetic material seems to have no significant impact on prosthetic survival rates. Further research is required to provide more evidence regarding the impact of the prosthetic material on long-term outcome. Conflict-of-interest statement: The authors declare that they have no conflict of interest
Modern prosthetic concepts for fixed restorations on teeth andimplants with the aid of digital technologies and workflows
No full textAdvancements in digital technologies and workflows have led to a paradigm shift in dental medicine in the last decades. In the field of prosthodontics, a vast choice of digital tools influences diagnostics, treatment planning and the fabrication method of dental restorations and has an impact on their clinical long-term outcomes. Dental materials used for tooth- and implant-supported restorations shifted from the long-time gold standard of metal-ceramics to novel, all-ceramic materials with enhanced esthetics and material properties. For routine clinical application scientific evidence on the performance of these more recent options is needed.
The research presented in this thesis focused on two research lines. The first line of research aimed at investigating clinical long-term outcomes of all-ceramic tooth- and implantborne restorations fabricated with the aid of digital technologies and applying novel digital workflows. The clinical performance of all-ceramic materials was analyzed in one retrospective 11-year follow-up study and in one multicenter randomized controlled clinical trial. Ceramic fractures and chipping of the veneering ceramic turned out to be the most frequent complication in all-ceramic restorations. Furthermore, the conventional early implant placement protocol was compared to the more patient-oriented, time-efficient immediate implant placement protocol and the clinical outcomes of the inserted bone-level-tapered implants were analyzed. To further reduce technical complications as chipping and ceramic fractures, a novel veneering method is presented, and a clinical study was developed and is ongoing.
Dental materials have improved thanks to the development of digital technologies, and at the same time, the importance of personalized medicine is growing at a fast pace. The second research line focused on customizing soft tissue substitutes for volume augmentation after tooth loss. Research line two is closely linked to research line one by the introduced randomized controlled trial, in which the peri-implant volume was analyzed after immediate and early implant placement. The knowledge from this clinical study was transferred to design and fabricate a semi-customized graft, ideally adapted to the typical volume defect shape after a single tooth extraction. This is one further step in the direction of personalized oral medicine, where treatments will in the future be individually adapted to the patient’s needs by using the significant number of possibilities that the newest digital technologies can offer.
Finally, a future outlook is given, summarizing the latest advancements in digital technologies for prosthodontics and the areas of future research. The increasing importance of patient-centered medicine is particularly emphasized, laying one focus on patient-reported outcome measures (PROMs) for future research.</p
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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