1,720,962 research outputs found
Chirurgia flapless guidata per la riabilitazione immediata di edentulie totali : descrizione di un caso clinico
No full textLa gestione di un caso complesso implantare : dall’analisi preoperatoria alla realizzazione della protesi definitiva
No full textUna programmazione pre-chirurgica scorretta e una gestione del sito implantare altrettanto
poco curata possono portare a inconvenienti quali risultati finali poco predicibili dal punto
di vista funzionale e anche estetico. In questi casi sempre più frequentemente ci si trova
di fronte alla gestione di casi complessi in cui ci si deve confrontare con impianti di diverse
tipologie posizionati in tempi diversi. Nell’ambito del trattamento implanto-protesico, queste
situazioni, ancor più di altre, richiedono la corretta gestione dell’intero piano di trattamento,
cercando di ovviare agli inconvenienti affinché si ottenga un risultato estetico e funzionale
ottimale, soprattutto nelle zone ad alta esigenza estetica. La presenza di problemi a livello
dei tessuti peri-implantari spesso provocano una serie di deficit dei tessuti duri e molli, che
devono essere risolti attraverso delle manovre di rigenerativa tissutale e aumento dei tessuti
molli. Diverse sono le metodiche descritte in letteratura inerenti le procedure di incremento
dei tessuti duri pre-implantari in caso di atrofie alveolo mascellari1,2. In alcuni casi tali procedure
prevedono l’utilizzo di membrane non-riassorbibili rinforzate in titanio per l’aumento verticale
della cresta edentula. Anche la gestione dei tessuti molli è ben documentata in letteratura;
infatti, mediante l’utilizzo di tecniche di chirurgia muco-gengivale è possibile incrementare lo
spessore di gengiva cheratinizzata peri-implantare migliorando l’estetica e la salute dei tessuti
molli. Tali metodiche comprendono anche l’utilizzo di innesti epitelio-connettivali prelevati dal
palato3,4. Il caso clinico preso in esame descrive l’analisi, la programmazione e l’esecuzione
di un piano di trattamento complesso. Dall’iniziale situazione implanto-protesica presente
sono stati eseguiti sia interventi di rigenerativa ossea tramite GBR in zona retro-mascellare e
l’inserimento dilazionato di 3 impianti, che interventi con tecniche di chirurgia plastica periimplantare
per l’aumento della quantità di mucosa cheratinizzata durante la seconda fase
chirurgica sia nei nuovi siti implantari che nei vecchi. L’unione delle due tecniche ha permesso
l’ottenimento di un’architettura tissutale armonica e di un’adeguata presenza di gengiva
cheratinizzata e la risoluzione in modo soddisfacente della riabilitazione implanto-protesicaAn incorrect pre-surgery programmation and a wrong management of the implant
site could cause many disadvantages like unpredictable aesthetic and functional final
results. In this cases increasingly we have to manage complex situations in which
different kind of implant are inserted in different time. This situation, in an implantprosthetic
treatment, need the right management of the whole treatment plane,
trying to avoid drawbacks, with the aim to obtain the best functional and aesthetic
result, overall in the aesthetic area. Presence of peri-implant tissue problems, often
could cause some deficit of hard and soft tissues that need regenerative techniques to
eliminate these defect. There are some different kind of techniques described in literature to
improve hard tissues1,2. Some of these provide the use of non-resorbable reinforced titanium
membranes to facilitate the vertical growing of the edentulous ridge.
The management of soft tissues is also well described in literature. With the use of mucous
gum surgery techniques, is possible to improve the thickness of the keratinized gingiva,
improving the health and the aesthetic of soft tissues. These techniques also include the use
of epithelial connective tissue graft taken from the palate3,4. This clinical case describes the
analysis, programming and execution of a complex treatment plan. From the initial
implant-prosthetic situation, both bone regenerative responses with GBR in the back
jaw area, insertion of 3 implants and peri-implant plastic surgery, to increase the quality
of the keratinized mucosa, were performed, both in the new and old implant site.
The union of the two techniques allowed us to obtain a tissue harmonic architecture
and an appropriate presence of keratinized gingiva with the good resolution of the implant-prosthetic rehabilitation
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
Alveolar antral artery isolation during sinus lift procedure with the double window technique
Full text linkThe sinus lift technique, introduced in 1976 by Tatum and subsequently described by Boyne in 1980, is nowadays considered a safe and reliable procedure for the rehabilitation of the atrophic upper posterior maxilla. The alveolar antral artery (AAA) is anastomoses between the posterior superior alveolar artery (PSAA) and the infraorbital artery (IOA) and may be present in the sinusal antrostomy. The haemorrhage of this vascular bundle represents the second intra-operatory complication in term of frequency during sinus lift procedure. Purpose of this study was to illustrate and describe a new technique allowing the AAA isolation during sinus lift procedure in cases in which the artery is clearly present inside the surgical area, detectable through CT scan exam. Presence, course and possible identification of the alveolar antral artery are also discussed, according to the studies present in the literature
J shaped hip onlay graft as alternative to Le Fort I osteotomy for the treatment of sagittal discrepancies in the maxillary atrophies
No full textBackground The treatment of the severely resorbed maxilla is very challenging with regards to an implant supported rehabilitation. Very often, an intermaxillary sagittal discrepancy occurs, coupled to an increased vertical ridge resorption, and a class III-like situation can be appreciated. In such cases, the surgical treatment to restore the correct intermaxillary relationship is represented by a Le Fort I osteotomy with interpositional autogenous blocks. Thanks to this procedure, both the sagittal and the vertical intermaxillary relationships can be restored. Nevertheless, Le Fort I appoach is quite aggressive if we consider that most of the patients suitable for such a treatment are senior ones. For this reason, an alternative procedure can be chosen in order to reduce postoperative morbidity. Conclusion The described technique, the J-shaped onlay graft, can lead to a satisfactory restoration of the intermaxillary relationship in sight of a rehabilitation with implants and fixed or swivel lock prostheses
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
Sinus lift procedure in presence of mucosal cyst : a clinical prospective study
No full textBackground:
Sinus lift procedures are considered safe and predictable procedures for
the rehabilitation of the athrophic upper posterior maxilla. The presence of sinusal neoformation, highly reported in the literature, could represent a problem for sinus lifts. The removal of these lesions is recommended in order to limit intra- and post-operative complications. The aim of this prospective study is to describe the surgical removal of sinusal cyst concurrently with sinus lift procedures.
Methods:
10 patients, 7 male and 3 female, presenting edentulism of the posterior maxilla associated with severe pneumatization of the maxillary sinus and presence of an antral cyst, were enrolled in the study. 14 sinus lift procedures were performed following aspiration of the liquid contained within the cyst. Radiographic exams were performed before, immediately after, and six months after the surgery.
Results:
All patients showed successful integration of the implants and the survival rate was 100% at the most recent recall. Intraoperative complications were rare and included minor membrane perforations in 3 cases. In 11 cases the CT scan examination revealed no sign of presence of the lesion after 6 months. In 3 cases the total volume of the
lesion was significantly reduced. 4 patients presented thickening of the Scheiderian membrane up to 2 mm with no sign of inflammation.
Conclusions:
This study proposes a modified surgical approach to drain the endoluminal liquid during the sinus lift procedure. The new proposed technique allows the reduction of the surgical morbidity thanks to the elimination of one surgical phase in case of staged approach. The Authors consider this technique safe and predictabl
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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