1,721,080 research outputs found
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
La stabilità a lungo termine nelle mal occlusioni di II classe scheletrica dopo intervento combinato di chirurgia orto gnatica: valutazione dei mezzi di fissazione rigida interna rispetto all’osteosintesi a filo
No full text
Unlocking the Potential of Dental-Derived Mesenchymal Stem Cells in Regenerative Medicine
Full text link: Over the past few decades, life expectancy has been increasing in several countries [...]
4 mm short implants in the treatment of reconstructive surgery failures of the atrophic posterior mandible: a retrospective study.
No full textBACKGROUND: Bone augmentation procedures can be associated with significant patient morbidity, can be more expensive and may requires longer times (up to 1 year) before patients are rehabilitated with implant-supported prostheses. Moreover complications, especially for vertical augmentation techniques, are common.
AIM/HYPOTHESIS: The aim of this retrospective study was to evaluate whether short (4 mm) dental implants could be a suitable alternative in the failure of reconstructive surgery in the atrophic posterior mandible.
MATERIAL AND METHODS: Patients experienced failure in the reconstructive surgery of the atrophic posterior mandible were enrolled. The type of reconstructive surgery, surgical complications, data related to the timing of failure and ways of resolution were collected. For their rehabilitation, super short (4 mm) implants (Twin-Kone"Universal System, Global D, France) with a mean diameter of 4.09 mm were placed. After 4 months, provisional reinforced acrylic prostheses were delivered. Provisional prostheses were replaced, after 4 months, by definitive screw-retained metal-resin restoration. Outcome measures were prostheses and implant failures, any complications, peri-implant marginal bone level changes and patient satisfaction. Patients were followed up to an average of 2.37 years after loading.
RESULTS: 24 patients (5 Males and 19 Females; mean age: 60.5 year old) were enrolled in this study. They were treated with inlay technique, onlay technique, alveolar distraction osteogenesis and Guided Bone Regeneration (GBR). Complications were dehiscence/graft exposition, necrosis, periimplantitis, paresthesia, non integrated graft and graft infection; they occurred on average 6.5 weeks after surgery. Significantly more complications occurred in the GBR group than the onlay and the distraction group (Kruskal Wallis test; P = 0.001). 58 super short (4 mm) implants were placed in the posterior mandible after the resolution of the complications. Up to a mean period of 2.37 years after loading, only two patients experienced short implant and/or prosthesis failures. The resolution way of reconstructive complications did not influence the number of short implant complications. There were no statistically significant differences between marginal bone level changes at implant placement and at 1, 2, 3 years follow-up. The marginal bone level at 3 years follow-up was 0.62 mm. All patients were fully satisfied with the implant treatment.
CONCLUSIONS AND CLINICAL IMPLICATIONS: This study suggests that super short (4 mm) dental implants could be a suitable, faster, cheaper and easier rehabilitation option in the failure of the reconstructive surgery of the atrophic posterior mandible. These results need to be confirmed by trials with follow-ups of at least 5 years
Influence of crestal and sub-crestal implant position on development of peri-implant diseases: a 5-year retrospective analysis
Full text linkObjectives: The aim of the present study was to evaluate the influence of crestal and subcrestal implant position on development of peri-implant diseases. Materials and methods: The study was designed as a retrospective clinical and radiographic analysis. Implant-supported fixed dental prostheses were allocated in two groups: with the shoulder (i) placed in sub-crestal level and (ii) placed at bone level. For each patient, the following clinical variables were assessed: FMPS, FMBS, PlI, BOP, and PD. After prothesis delivery, an intraoral radiograph was obtained; this exam was performed also at 5 years of observation period. Results: No statistically significant difference was found in terms of FMPS and FMBS at baseline and after 5 years follow-up (P < 0.05). A statistically significant difference was assessed between PD of control group and test group (P = 0.042). Patient-based analysis showed a 25.6% of peri-implant mucositis and 32.6% of peri-implantitis for implants placed with the shoulder in crestal position, while for implants inserted in sub-crestal position the percentage of peri-implant-mucositis and peri-implantitis were 19%; no statistically significant difference was found between groups after 5 years (P < 0.05). Conclusions: Within the limitation of the present study, the clinical and radiographic outcomes showed that the percentage of peri-implant mucositis and peri-implantitis was not statistically significant for both groups after 5 years follow-up. Clinical relevance: The outcomes of present study clinically demonstrated that a deep position of implant shoulder did not provide any benefits. On the contrary, it may be considered a possible risk indicator for implant diseases
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
La flora anaerobia dell'ascesso parodontale.Anaerobic flora of a periodontal abscess
No full textThis study was carried out to analyze the percentage composition of the anaerobic microflora associated with periodontal abscess. Bacterial samples have been collected from the apical part of five periodontal pockets of patients presenting clinical and radiographical signs of advanced adult perioodontitis complicated by purulent periodontal inflammation. Subgingival flora composition, detected by strict anaerobic microbiological procedure based on use of selective and non-selective media, showed that these are mixed infections in which predominates anaerobic species of cocci and bacilli representing 25% and 34% of the cultivable microflora. These data are useful not only for the comprehension of etiopathogenesis but also for the treatment of periodontal abscesses, mainly, in dental practice, regarding the choice of suitable antibiotic therapy when needed
- …
