1,720,960 research outputs found
CO2 laser for surgical treatment of impacted canines
No full textINTRODUCTION
Impaction is defined as the failure of tooth eruption at its correct site in the dental arch, in its normal period of growth. The permanent maxillary canine is the most commonly impacted tooth after third molars, it has a predilection for the oral side with a tendency to be unilateral. It is more common in females. The etiology is unclear: orally impacted canines can be associated with hypoplastic or missing lateral incisors or with aplasia of premolars, presence of supernumerary teeth and malpositioned third molars.
There are many possible surgical techniques to approach impacted canines: early interceptive intervention or late intervention, including extraction, autotransplantation, surgical exposure of the canine’s crown with open or closed technique and subsequent orthodontic alignment. The choice depends on canine position, associated malocclusion, skill and experience of orthodontist and surgeon, patient compliance.
Literature reports that High-Intensity Laser Therapies (HILT) with cutting action on the soft tissues, can also be used for opercolectomy of impacted tooth.
MATERIALS AND METHODS
A 13-years-old male referred to the Department of Oral and Maxillo-Facial Sciences, “Sapienza” University of Rome, for an orthodontic examination because of the maxillary primary canines persistence in dental arch. Orthopanoramic x-ray showed osteomucosal impaction of both permanent maxillary canines. The family history revealed that patient’s mother had the same orthodontic problem. Cone Beam CT was requested to plan the surgical-orthodontic treatment. Surgical exposure of the impacted canines was performed using a CO2 laser (Smart US20D®, DEKA-Florence, Italy) and subsequent periodontal wrap application. No orthodontic devices were applied for impacted teeth traction on dental arch. Canines movement towards the dental arch was monitored at 1, 8 and 16 weeks post-surgery with intraoral scanner CS3500 (Carestream Dental). When canines crowns were completely erupted on palatal side, the alignment in the arch with direct/indirect bonding technique was performed.
RESULTS
Complete disimpaction of canines crown was obtained in only four months.
CONCLUSIONS
As mentioned in Literature, this case confirms that impacted canines exposure with CO2 laser has advantages if compared with traditional surgery: no bleeding during and after procedure, no need to use sutures and laser biostimulating effect allow spontaneous eruption faster than with conventional treatments
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Photobiomodulation therapy on orthodontic movement: analysis of preliminary studies with a new protocol
Get PDFThis study aimed to investigate the effectiveness of photobiomodulation therapy (PBMT) on the acceleration of orthodontic movements, deriving from its biostimulating and regenerative capacity on soft tissues, consequent to the increase in differentiation, proliferation, and activity of cells that are involved with alveolar bone remodeling. The present randomized controlled trial was conducted on six patients who required extractive orthodontic therapy because their ectopic canines had erupted. A total of eight canines were analyzed, four of which received laser irradiation (i.e., experimental group). Two weeks after the extractions, all canines of the experimental and placebo groups were distalized simultaneously and symmetrically with the laceback retraction technique. The PBMT protocol consisted of four cycles of laser applications, one each on days 0, 3, 7, and 14 of the study, with session treatment durations of 2-4 min. The results of the descriptive analysis on the distal displacement speed of the canines after 1 month of follow-up indicate an average displacement of 1.35 mm for the non-irradiated group and 1.98 mm for the irradiated group. Through inferential analysis, a statistically significant difference (p < 0.05) was found between the average speed of the irradiated canines and the control canines. The low energy density laser used in this study, with the parameters set, was found to be a tool capable of statistically significantly accelerating the distal displacement of canines
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
- …
