1,720,963 research outputs found
Augmentation procedures for the rehabilitation of deficient edentulous ridges with oral implants
No full textObjectives: To analyze publications related to augmentation procedures and to evaluate
the success of different surgical techniques for ridge reconstruction and the survival/success
rates of implants placed in the augmented areas.
Material and methods: Clinical investigations published in English involving at least 5
patients and with a minimum follow-up of 6 months were included. The following
procedures were considered: a) Guided bone regeneration (GBR); 2) Onlay bone grafts; 3)
Inlay grafts; 4) Bone splitting for ridge expansion (RE); 5) Distraction osteogenesis (DO);
and 6) Revascularized flaps. Success rates of augmentation procedures and related
morbidity, as well as survival and success rates of implants placed in the augmented sites
were analyzed.
Results: Success rates of surgical procedures ranged from 60% to 100% for GBR, from 92%
to 100% for onlay bone grafts, from 98% to 100% for ridge expansion techniques, from
96,7% to 100% for DO, and was 87.5% for revascularized flaps, whereas survival rates of
implants ranged from 92% to 100% for GBR, from 60% to 100% for onlay bone grafts, from
91% to 97.3% for RE, from 90.4% to 100% for DO, and, finally, was 88.2% for
revascularized flaps.
Conclusion: On the basis of available data it was shown that it was difficult to demonstrate
that a particular surgical procedure offered better outcome as compared to another. The
main limit encountered in this review has been the overall poor methodological quality of
the published articles. Therefore larger well-designed long term trials are needed
Rialzo del seno mascellare e impianti endossei : risultati clinici a distanza di tempo e proposta di classificazione dei difetti iniziali del mascellare superiore atrofico
No full textScopo di questo studio è presentare una classificazione dei difetti ossei mascellari che necessitano di procedure di elevazione del seno mascellare con due obiettivi: proporre
una standardizzazione delle procedure chirurgiche in base al tipo iniziale di atrofia e permettere una valutazione del tasso di successo/sopravvivenza degli impianti inseriti
nelle aree ricostruite in relazione alla situazione iniziale. Su un totale di 692 pazienti trattati consecutivamente dal 1992 al 2004 sono stati effettuati 952 rialzi del seno mascellare. I difetti iniziali sono stati catalogati secondo una nuova classificazione che considera non solo l’altezza ossea residua al di sotto del seno, ma anche lo spessore della cresta alveolare e il rapporto intermascellare orizzontale e verticale. I risultati sono stati differenziati in
base alle differenti classi di appartenenza. L’elevazione del seno è stata effettuata con osso autologo prelevato da siti intraorali o extraorali. Per correggere concomitanti difetti alveolari, 579 rialzi sono stati associati a innesti onlay orizzontali e/o verticali. Un totale di
2037 impianti è stato inserito nei seni rialzati, immediatamente o a distanza di 4-6 mesi
dalla ricostruzione. Gli impianti sono stati caricati dopo 3-6 mesi. Il follow-up medio è stato di 59 mesi (12-144 mesi). Il tasso di successo delle procedure ricostruttive varia tra il 93,2% e il 100%, in base alla classe di atrofia; i tassi di sopravvivenza e di successo complessivi
degli impianti corrispondono rispettivamente al 95,8% e al 92,5%, mentre il tasso di sopravvivenza e di successo a seconda della classe di atrofia varia tra il 90% e il 97,6%, e
tra l’85,4% e il 95,5% rispettivamente. I tassi di successo più bassi sono associati alle classi caratterizzate da un’atrofia più grave. I risultati ottenuti hanno dimostrato che l’elevazione del seno mascellare, associata o meno a procedure ricostruttive con innesti ossei autologhi,
è una procedura affidabile che consente l’inserimento di impianti in mascelle edentule atrofiche, indipendentemente dalla situazione clinica iniziale. Tuttavia, deve essere sottolineato che la percentuale di successo delle procedure ricostruttive e degli impianti
differisce a seconda delle classi di atrofia, mostrando tassi di successo più bassi nei casi di atrofia più grave
Riabilitazione implanto-protesica in pazienti con esiti di labiopalatoschisi
No full textObjectives. This study evaluated long-term survival and success rates of implants inserted in cleft lip and palate patients previously treated with autogenous bone grafts for the correction of residual alveolar cleft. Materials and methods. Between 1993 and 2004 115 patients affected by sequelae of cleft lip and palate (previously treated with labioplasty and palatoplasty) and a residual alveolar cleft in association with a partially edentulous anterior maxilla were treated by autogenous bone grafts harvested from intraoral or extraoral sites. Among these, 30 patients (15 females and 15 males) were selected for rehabilitation with implant-supported prostheses and received a total of 51 endosseous implants in the grafted areas. Four to six months after implant placement, the prosthetic rehabilitation was started. Patients were followed from 24 to 156 months (mean: 70.4 months). The following parameters were evaluated: 1) survival and success rates according to the criteria of Albrektsson et al.; 2) clinical peri-implant parameters (plaque index, bleeding index, probing depth). Results. Two out of 51 implants were removed (survival rate 94.7%), due to loss of osseointegration. Six implants did not satisfy success criteria because of excessive peri-implant bone resorption: implant success rate was therefore 84.2%. Clinical parameters demonstrated healthy peri-implant soft tissues in all survived implants. Conclusions. Dental rehabilitation of patients affected by sequelae of cleft lip and palate treated by grafting autogenous bone in the residual cleft and inserting implants in the grafted clefts demonstrated to be a reliable procedure with implant survival rates which are consistent with those observed for implants placed in native bone. On the contrary, the success rate of implants reported in this study was lower than that reported for implants placed in native bone, because of higher peri-implant resorption, in particular within two years after the start of prosthetic loading
Impiego Clinico in Chirurgia Orale del Plasma Ricco di Piastrine (PRP): Revisione Critica della Letteratura
No full textIl rialzo del seno mascellare a scopo implantologico : analisi retrospettiva di 464 casi
No full text
Complicanze dei siti donatori di prelievo osseo intraorali ed extraorali
No full textINTRODUCTION: Dental rehabilitation of partially or totally edentulous patients with oral implants has become a common practice in the last decades with reliable long-term results. However, unfavourable conditions of the alveolar ridge, due to atrophy, periodontal disease and previous trauma, may lead to an insufficient bone volume or unfavorable vertical, transverse, and sagittal interarch relationship, which may render implant placement impossible or unacceptable from a functional and esthetic viewpoint. The use of intraoral or extraoral bone grafts seems to be a predictable technique for the correction of facial jaws atrophy. RETROSPECTIVE STUDY. After reviewing the most recent literature, the Authors present a review of morbidity associated with bone harvesting in more than 1000 patients. RESULTS AND CONCLUSIONS. Data reported seem to show that bone augmentation of atrophic edentulous ridges with bone grafts is an acceptable procedure that may allow to maintain the initial bone gain without important complications linked to the donor site
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
- …
