1,721,077 research outputs found
Autogenous onlay bone grafts vs. alveolar distraction osteogenesis for the correction of vertically deficient edentulous ridges: a 2-4-year prospective study on humans
No full textObjectives: The purposes of this study were to compare: (a) autogenous bone grafts (ABG)
and distraction osteogenesis (DO) for their ability in correcting vertically deficient
mandibular ridges and their capability in maintaining over time the vertical bone gain
obtained before and after implant placement; and (b) the survival and success rates of
implants placed in the reconstructed or distracted areas.
Material and methods: In a 2-year period (2001–2002), 17 patients presenting with
vertically atrophied partially edentulous mandibles requiring implant-supported prosthetic
rehabilitation, were included in this study. Patients were randomly assigned to two groups.
Eight patients (group 1) were treated with ABG harvested from the mandibular ramus,
while nine patients (group 2) were treated by means of DO. In group 1, patients received
implants 4–5 months after the reconstructive procedure, while in group 2 implants were
placed at the time of distraction device removal (approximately 3 months after the
completion of distraction). A total of 19 endosseous implants were placed in group 1, and
21 implants were placed in group 2 patients. For both groups, after an additional 3–5-
month period, prosthetic rehabilitation was started.
Results: Bone resorption before implant placement was significantly higher in group 1
(P1⁄40.01), while no statistically significant differences were found between the two groups
as far as survival and success rates of implants and peri-implant bone resorption after the
start of prosthetic loading were concerned.
Conclusion: The results suggested that: (a) both techniques may effectively improve the
deficit of vertically resorbed edentulous ridges; (b) survival and success rates of implants
placed in the reconstructed/distracted areas are consistent with those of implants placed in
native bone
Dental implants placed in grafted maxillary sinuses: a retrospective analysis of clinical outcome according to the initial clinical situation and a proposal of defect classification
No full textOBJECTIVE OF THE STUDY:
To present a classification of maxillary defects necessitating sinus floor elevation procedures (SFEPs) with two objectives: (a) to propose a standardization of surgical procedures according to initial type of atrophy and (b) to allow the evaluation of the success/survival rates of implants placed in the grafted areas according to the initial situation.
MATERIALS AND METHODS:
Nine-hundred and fifty-two consecutive SFEP were performed on 692 patients. Initial defects were classified according to a new classification, which considered not only residual bone height below the sinus but also the width of the alveolar crest and horizontal/vertical intermaxillary relationship. Results were evaluated according to the different classes. The sinuses were grafted with autogenous bone taken from intra-oral or extra-oral sites: 579 SFEP were associated with vertical and/or horizontal onlay grafts to correct concomitant alveolar ridge deficits. A total of 2037 implants were inserted into the grafted sinuses either immediately or 4-6 months later. Three to 6 months afterwards, implants were loaded. The mean follow-up was 59 months (range: 12-144 months).
RESULTS:
The success rate of the reconstructive procedures varied between 93.2% and 100%, according to class of atrophy; the overall survival and success rates of implants were 95.8% and 92.5%, respectively, whereas the survival and success rates according to class of atrophy varied between 90% and 97.6%, and between 85.4% and 95.5%, respectively. Lower success rates were found in classes presenting with more severe atrophy.
CONCLUSION:
The results obtained demonstrated that sinus floor elevation, alone or in association with reconstructive procedures with autogenous bone grafts, is a reliable procedure to allow implant placement in atrophic edentulous maxillae, irrespective of the initial clinical situation. However, it must be underlined that the success rates of reconstructive procedures and implants differ according to class of atrophy, showing lower success rates in classes presenting with more severe atroph
RPD ad ancoraggio implantare: una nuova proposta in tema di protesi sociale. Parte I: presentazione di una opzione riabilitativa originale: la protesi parziale rimovibile ancorata ad impianti.
No full text-L’edentulismo parziale nel paziente in età pensionistica costituirà, in un prossimo futuro, la mutilazione delle arcate dentarie più frequente con la
quale ci si dovrà confrontare. Un trattamento orientato secondo problemi può avere anche obiettivi minimi, basarsi su una tecnologia semplice e,
ciononostante, essere in grado di soddisfare le aspettative del paziente.
Lo scopo di questo lavoro è di illustrare un’opzione riabilitativa originale, semplice ed efficace, alla portata di tutti i professionisti, e nel contempo
economica e facile da utilizzare per il paziente. Questa opzione riabilitativa si basa sulla progettazione di una corretta protesi parziale rimovibile
(RPD) che può beneficiare nell’inserzione di un numero limitato di impianti con funzione di ancoraggio. Il dispositivo così costituito prende
il nome di protesi parziale rimovibile ancorata a impianti (RPDI), e ha come caratteristica la possibilità di distribuire le forze masticatorie secondo
il modello dento-mucoso tipico delle RPD a estensione distale, a differenza delle protesi rimovibili supportate da impianti, nelle quali tutto il
carico funzionale è trasmesso agli elementi pilastr
RPD ad ancoraggio implantare: una nuova proposta in tema di protesi sociale. Parte II: studio retrospettivo a 5 anni.
No full text-L’approccio razionale all’edentulismo parziale abbraccia un ampio spettro di soluzioni, dall’astensione alla riabilitazione protesica con diversi gradi
di sofisticazione. La scelta dipende da svariati fattori, fra cui l’interazione tra ciò che il paziente desidera, ciò che egli può permettersi da un punto
di vista fisico ed economico e dalla capacità tecnica dell’odontoiatra.
La RPDI si configura come un trattamento che da un lato prevede la semplicità e l’efficacia riabilitativa (sia dentale sia ortopedica), senza presentare
gli svantaggi delle demolitive preparazioni per protesi combinata o degli inestetici e psicologicamente negativi ganci.
La sperimentazione clinica della RPDI presso il nostro istituto consta di 145 casi clinici eseguiti dal 1998 al 2005, per un totale di 221 protesi mascellari
o mandibolari ancorate ad impianti osteointegrati. I risultati preliminari in termini di funzione, estetica e durata sono certamente favorevoli.
Tuttavia lo scopo di questo lavoro è esporre i risultati ottenuti a 5 anni con riabilitazioni con RPDI su 32 casi clinici trattati dal 1998 al 2000
presso l’Unità Operativa di Odontoiatria dell’Università di Modena e Reggio Emilia
RPD ad ancoraggio implantare: una nuova proposta in tema di protesi sociale – Parte 2: Studio retrospettivo a 5 anni
No full textL’approccio razionale all’edentulismo parziale abbraccia un ampio spettro di soluzioni, dall’astensione alla riabilitazione protesica con diversi gradi di sofisticazione. La scelta dipende da svariati fattori, fra cui l’interazione tra ciò che il paziente desidera, ciò che egli può permettersi da un punto di vista fisico ed economico e dalla capacità tecnica dell’odontoiatra. La RPDI si configura come un trattamento che da un lato prevede la semplicità e l’efficacia riabilitativa (sia dentale sia ortopedica), senza presentare gli svantaggi delle demolitive preparazioni per protesi combinata o degli inestetici e psicologicamente negativi ganci. La sperimentazione clinica della RPDI presso il nostro istituto consta di 145 casi clinici eseguiti dal 1998 al 2005, per un totale di 221 protesi mascellari o mandibolari ancorate ad impianti osteointegrati. I risultati preliminari in termini di funzione, estetica e durata sono certamente favorevoli. Tuttavia lo scopo di questo lavoro è esporre i risultati ottenuti a 5 anni con riabilitazioni con RPDI su 32 casi clinici trattati dal 1998 al 2000 presso l’Unità Operativa di Odontoiatria dell’Università di Modena e Reggio Emilia
Distrazione alveolare osteogenetica per la correzione dei difetti verticali nelle creste edentule: Studio prospettico multicentrico sull’uomo
No full textVedasi l'allegat
Metodica protesica di fissazione trasversale nella sistematica ITI. Presentazione di un caso clinico.
No full textOsteomas of the paranasal sinuses: review of the literature and personal cases[Gli osteomi dei seni paranasali: revisione della letteratura e casistica personale.]
No full textThe sinusal osteomas: a review of literature and personal cases. The osteoma is a osteogenetic benign tumour formed by a fully developed bone, characterized by a slow growth, which, as far as the maxillo-facial region is concerned, shows to be frequently located in the paranasal sinuses. The osteoma originates from one of the sinus walls and spreads into the sinus cavity itself producing symptoms related to a lesion space occupying. In the present report, taking into consideration 4 personal cases, some literature datas are examined concerning the epidemiology, clinical behaviour and especially the therapeutic implications to be adopted by the surgeon in the presence of sinusal osteoma
Long-term results of mandibular reconstruction with autogenous bone grafts and oral implants after tumor resection
No full textObjectives: (a) To evaluate retrospectively the clinical outcome of non-vascularized bone grafts used for the reconstruction of mandibular defects following tumor resection; (b) to evaluate the clinical outcome of implants and implant-supported prostheses placed in the reconstructed areas; and (c) to evaluate patients' satisfaction regarding function and esthetics after oral rehabilitation. Material and methods: In a 9-year period (1995-2003), 29 patients affected by mandibular tumors involving to tooth bearing areas were treated by means of tumor resection and immediate or delayed reconstruction with autogenous non-revascularized calvarial or iliac bone grafts. Among these patients, 16 patients were selected for dental rehabilitation of the lost dentition with implant-supported 3fixed prosthese333s. For to 7 months later, the patients received 60 oral implants for the prosthetic rehabilitation of the reconstructed edentulous areas. Results: No total failure of the graft was observed, while partial loss of the graft was observed in one patient. The mean follow-up of patients after the start of prosthetic loading of implants treated was 94 months (range: 36-132 months). Two patients dropped out of the follow-up after 3 and 4 years of observation, respectively. Two implants were removed due to loss of osseointegration, while two implants, although still integrated, presented peri-implant bone resorption values higher than those proposed by Albrektsson et al. for successful implants. Cumulative survival and success rates of implants were 96.7% and 93.3%, respectively. Conclusion: Results from this study demonstrated that bone defects following resection of mandibular tumors can be predictably reconstructed with autogenous bone grafts taken from the calvarium or the anterior iliac crest. It has also been shown that the long-term survival and success rates of implants placed in the reconstructed areas (96.7% and 93.3%, respectively) may guarantee an excellent prognosis of implant-supported prostheses
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