1,721,047 research outputs found
Considerations on the timing of orthodontic-surgical procedures in the correction of Class III skeletal malocclusions.
No full textClass III malocclusions are characterized by a mesialized position of the mandibular component, a condition present in 1-5% of the Caucasian population. In more severe cases, the only solution is surgical treatment, preceded by an orthodontic phase to prepare for the intervention and concluded with a phase to finalize the occlusion. The method proposed in this study aims to reduce the duration of pre-surgical orthodontics to achieve a faster improvement in the patient's aesthetics, with significant psychological implications. Taking a sample of 15 patients previously subjected to orthodontic-surgical treatment to resolve Class III malocclusion, the surgical treatment performed in vivo was replicated on the initial models. After identifying dental precontact, the time required to resolve them during the pre-surgical phase was calculated. Based on the number, type, and extent of movements, a duration of approximately 5 months for the orthodontic preparation phase was predicted, with a reduction of about 9.4 months compared to the average time required for actual pre-surgical treatment. It is believed that the proposed method may represent a particularly advantageous therapeutic approach for patients with skeletal Class III proposed for surgical correction
"Orthodontic extraction" for the treatment of dentigerous cysts
No full textOBJECTIVES. Dentigerous cysts are a frequent finding in both jaws. They are usually treated by complete surgical enucleation with high risk of post-surgical complications, especially in case of large lesions. An innovative, more conservative and less traumatic approach is proposed in this paper. MATERIALS AND METHODS. 7 patients with mandibular cysts larger than 3 cm associated with impacted third molars were treated by a combined orthodontic-surgical approach. During cyst marsupialization under local anesthesia, tooth crown was exposed and an orthodontic bracket was bonded. RESULTS. The teeth were extruded and extracted with no post-surgical complications after that they were moved away from mandibular canal and new bone developed distally to second molar. A significant reduction of cystic cavity and improvement of periodontal health of adjacent second molars were obtained. CONCLUSIONS. This combined approach makes surgery easier and greatly reduces the risk of post-surgical complications. The procedure proved to be effective in treating large mandibular cysts associated with impacted third molars
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
Orthodontic extraction: the extraction of the third molars in close proximity to the mandibular canal by an orthodontic surgical approach
No full text“Very late” relapses in Hodgkin’s disease patients: a rare but real phenomenon
No full textIn the past several decades, scientific and therapeutic advances have transformed Hodgkin's disease from a uniformly fatal illness to one that can be treated with the expectation of long-term remission or cure in the majority of cases. Because patients now survive for long periods after treatment, various late complications are being identified. Among patients with such late complications, some have been reported to experience "very late" relapses (> 10 years). Here we document recurrences in three patients with Hodgkin's disease more than 10 years after remission
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