1,720,971 research outputs found
Preoperative simulation accuracy evaluation in orthognatic surgery
No full textThe aim of this study was to assess Dolphin software precision in combined surgical-orthodontic treatment simulation using teleradiographs, considering both hard and soft tissues. Twenty patients (9 males and 11 females, average surgical age 24,8y) who underwent orthodontic-surgical treatment within the past 3 years were selected, with pre- and post-operative teleradiographs and accurate surgical reports. Dolphin software simulated surgical movements for splint creation on preoperative teleradiographs, while the postoperative ones were taken at the debonding. Cephalometric analysis compared treatment simulation and final teleradiographs, calculating mean, standard deviation, skewness, median, and kurtosis for 14 measurements. Wilcoxon signed-rank test was employed to assess differences, with a significance level of p≤0.05. In hard tissues, the upper incisor showed significant proclination (+2.4°), while sagittal measurements showed minor non-significant deviations. Verticality assessments indicated a slight reduction (SN/Md -1.3°) and less than expected Mx/Md angle (-0.6°). Soft tissues generally exhibited non-significant variations, with notable changes in lower lip length (-1.9mm) and nasolabial angle (+6.9). Dolphin software simulations are accurate overall but can be influenced by various factors. Notable changes include upper incisor proclination and alterations in the chin, lower lip dimension, and nasolabial angle. Standard deviations emphasize critical evaluation due to interindividual variability.The aim of this study was to assess Dolphin software precision in combined surgical-orthodontic treatment simulation using teleradiographs, considering both hard and soft tissues. Twenty patients (9 males and 11 females, average surgical age 24,8y) who underwent orthodontic-surgical treatment within the past 3 years were selected, with pre-and post-operative teleradiographs and accurate surgical reports. Dolphin software simulated surgical movements for splint creation on preoperative teleradiographs, while the postoperative ones were taken at the debonding. Cephalometric analysis compared treatment simulation and final teleradiographs, calculating mean, standard deviation, skewness, median, and kurtosis for 14 measurements. Wilcoxon signed-rank test was employed to assess differences, with a significance level of p≤0.05. In hard tissues, the upper incisor showed significant proclination (+2.4°), while sagittal measurements showed minor non-significant deviations. Verticality assessmen..
The value and present indications of staging laparotomy in Hodgkin's disease.
No full textI.F. 0.453
Abstract: From December 1971 to December 1976 224 patients with Hodgkin's disease underwent diagnostic laparotomy and splenectomy under a multidisciplinary protocol of treatment. In 149/224 (66.5%) the clinical stage of the disease was confirmed, whereas in 75/224 (33.5%) it was modified after surgery. In 7.6% of the patients (17/224) there were postoperative complications. One patient died of myocardial infarction. The rate of complications in the last 100 cases was 5%. Preoperative patient selection, excluding those definitely in stage IV, is of relevance, and it can be done by iliac crest biopsy and laparoscopy. Although a better exploitation of some diagnostic procedures (lymphangiography, laparoscopy) and the expanding use of chemotherapy may reduce in the future the need for staging laparotomy and splenectomy, diagnostic laparotomy is still indicated for the selection and preparation of patients for radiation therapy in stages I, II and III
Temporary occlusion of the hepatic artery plus infusion and systemic chemotherapy for inoperable cancer of the liver.
No full textI.F. 0.169
Abstract: Fourteen patients with diffuse tumors of the liver were treated with temporary occlusion of the hepatic artery (HA) by an external tourniquet followed by infusion and systemic chemotherapy. Three patients had primary neoplasms (one hepatocarcinoma and two cholangiocarcinomas) and eleven had metastatic disease (nine from carcinoma of the colon and rectum, one from retroperitoneal liposarcoma, and one from pulmonary small cell cancer). Infusion chemotherapy in all patients was based on 5-FU, Mitomycin and Vincristine. Systemic chemotherapy was FIVB in metastatic carcinoma and Adriamycin in primary liver tumors. All patients showed improvement of the performance status according to the Karnofsky Index. Objective response (OR) was present in 54% of cases. At present, median survival time in 12.5 months. Aggressive treatment combining hepatic ischemia with infusion and systemic polychemotherapy seems to provide an effective method of palliation in diffuse tumors of the liver. Delayed occlusion by an external tourniquet appears safer than intraoperative ligation of the HA
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
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