1,720,970 research outputs found
Gridplan midfacial analysis for alloplastic implants at the time of jaw surgery
No full textBackground: Middle-thirdfacialimplantsareprimarilyindicatedforfacialplas- tic surgery and orthognathic surgery as well as the secondary treatment of facial trauma and congenital malformations. Several methods of clinical anal- ysis have been described both for defect classification and for surgical technique and implant materials. These prove very difficult to apply so as to establish a precise standard.
Methods: A new frontal-view facial analysis was developed on the basis of a grid of three vertical and five horizontal lines, divided in turn into six high and four lower middle-third areas with three vertical lines on side view. These vertical lines (LC and P) prove useful for the purposes of quantifying degree of defect. The lines can be marked on the patient’s face during the intraoperative phase so as to ensure correct implant placement. Medpor implants were applied and se- cured by means of circumvestibular incision during Le Fort I osteotomy with titanium miniscrews.
Results: One hundred fifty-one patients with zygomatic defects were treated by means of this method during the correction of facial malocclusion. The results were achieved as planned during the preoperative phase in all cases. Postop- erative complications were of minor severity, and only one implant was removed. Conclusions: This method of facial analysis is simple, and the drawing of lines proves useful to ensure correct implant positioning and symmetry during the surgical phase. In addition to being very easy to apply, position, and shape, Medpor implants also offer long-term stability and involve no any major complications. (Plast. Reconstr. Surg. 123: 670, 2009.
Nasal Tip Rotation by Exclusive Superficial Musculoaponeurotic System Deep Medial Ligament Management: An Objective Evaluation
No full textThe nasal tip constitutes the mobile portion of the nose, in direct contraposition to the pyramid that is a fixed structure. Its configuration, position, and shape are derived mainly from the outline and from the thickness of the wing cartilages, important elements of the nasal tip, that together with skin and subcutaneous tissue can deeply influence the configuration and dynamics of this section of the nose as well. In reshaping the nasal tip, 2 fundamental concepts must be considered: projection and rotation; these may be modified, acting on the nasal cartilaginous framework and/or on the superficial nasal fibromuscular structure (SMAS). The aims of this study are to evaluate the nasal tip changes in terms of rotation and projection obtained just acting on superficial muscle aponeurotic deep medial layer without performing any dissection or modification of the nasal tip framework, and to try to explain these possible changes according to the SMAS structure rearrangements only. Twenty-one patients (18 female and 3 male) were subjected to closed rhinoplasty, without tip cartilage dissection/modification. Preoperative and postoperative tip rotation angle, nasolabial angle, and tip projection were measured. The only tip procedure performed was the resection of the SMAS deep medial layer. Our results show significant rotation of the nasal tip and no statistically significant tip deprojection
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
Lateral osteotomy plus hump resection vs hump re-modeling without lateral osteotomy: impact on frontal nasal view
No full textThis article reviews the personal experience and evolution of osteotomy approach in the last years of practice to obtain a natural appearance
of the nasal pyramid in the frontal view. The aim is to analyse the long-term results after rhinoplasty on nasal width in two different cohorts
of patients subjected to lateral osteotomy plus hump resection vs. hump re-modeling without lateral osteotomy considering the impact on
frontal nasal view and how this relates to changes observed over time in the nasal width and contour. The study was carried out between
January 2010 and December 2013, considering 42 patients undergoing primary rhinoplasty. Comparisons were made between the change in
the dorsal width of the nasal pyramid at the level of the medial canthi, at the level of the inferior margin of the orbital rim, of ventral width
of the nasal pyramid at the level of the medial canthi and at the level of the inferior margin of the orbital rim. In the first group, we found
significant postoperative mean widening of the intercanthal dorsal width and narrowing of the ventral, while in the second group there was
significant postoperative mean narrowing of the dorsal width both at level of the medial canthi and the anterior junction of the nasal bones.
Our analysis seems to point out that dorsal grafting is useful for re-shaping the nasal profile with a persistent and harmonious correction
of the dorsal frontal dimension of the nose. Simple hump removal/repositioning may be considered in selected instances to avoid lateral
osteotomies. It also seems of paramount importance to tailor osteotomies according to nasal bone anatomy: large, strong and curved bones
deserve aggressive narrowing by lateral and medial continuous osteotomies without periosteal elevation, although this approach may be
insufficient to narrow the upper dorsal aspect of the nose
Impiego di un nuovo farmaco (cisapride)nella terapia della malattia da reflusso gastroesofageo
No full text
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
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