1,721,042 research outputs found
Increasing occlusal vertical dimension: decisional algorithm of the prosthetic treatment phases|Rialzo della dimensione verticale d’occlusione: algoritmo decisionale delle fasi del trattamento protesico
No full textOBIETTIVI: Lo scopo di questo studio è analizzare la letteratura scientifica inerente al tema del rialzo della dimensione verticale d’occlusione (OVD) nelle riabilitazioni protesiche con l’intento di delineare un corretto percorso decisionale delle fasi del trattamento protesico e implanto- protesico sulla base dei dati attualmente disponibili sul tema.
MATERIALI E METODI: La ricerca è stata condotta utilizzando i database PubMed e Scopus. I criteri di inclusione hanno portato ad analizzare tutto il materiale selezionato tramite i seguenti termini chiave: “occlusal vertical dimension”; “increasing occlusal vertical dimension”. I criteri di esclusione non consentono di prendere in esame studi case report, revisioni e lavori che non vertano sul tema dell’aumento della dimensione verticale d’occlusione in campo protesico- riabilitativo e che non trattino le tematiche relative a criteri e modalità di determinazione della dimensione verticale d’occlusione, entità del rialzo della dimensione verticale, risposta adattativa al rialzo della dimensione verticale.
RISULTATI: I risultati della ricerca relativi alla determinazione della dimensione verticale d’occlusione mostrano che il trattamento protesico che prevede un incremento della OVD si basa sull’applicazione clinica delle evidenze disponibili sulla IOD, sull’identificazione di una RVD corretta e sulla risposta alla modifica della OVD unitamente a valutazioni estetiche, fonetiche, funzionali.
L’entità del rialzo della dimensione verticale, secondo i dati attualmente disponibili, può spingersi indicativamente fino a 5 mm. Il sistema stomatognatico in salute è in grado di fornire un’adeguata risposta adattativa alla riabilitazione
CONCLUSIONI: La OVD va considerata una dimensione dinamica che può essere modificata in modo sicuro purché venga rispettata la funzione. Il rialzo della dimensione verticale d’occlusione nelle riabilitazioni protesiche e implanto-protesiche deve essere considerato un trattamento sicuro quando fondato su corrette valutazioni diagnostiche e condotto nei limiti dettati dagli attuali dati della letteratura. Segni e i sintomi associati al rialzo della OVD si risolvono tendenzialmente entro 2 settimane.
Il percorso terapeutico deve essere finalizzato alla risposta adattativa all’incremento della OVD e il periodo di adattamento clinico può variare a seconda della complessità e della tipologia della riabilitazione protesica.
SIGNIFICATO CLINICO: In assenza di linee guida rigorose dal punto di vista scientifico sul tema, il successo della riabilitazione risulta legato ad attente diagnosi e pianificazione del caso, alla conoscenza dei materiali protesici e a una condotta terapeutica che a seconda
dei casi può richiedere una certa flessibilità nelle fasi del trattamento e che deve essere finalizzata all’accettazione della funzione masticatoria, fonetica e al comfort
Sinus floor augmentation with hydropneumatic technique: a retrospective study in 40 patients
No full textThe use of a hydropneumatic balloon for the elevation of the sinus membrane is a new technique for sinus floor augmentation procedures. Few cases using such a technique are reported in the English medical literature. This report describes 40 patients who were treated with this technique and studied retrospectively. Forty consecutive patients with an alveolar crest-sinus floor distance (bone height) ≤ 12 mm were enrolled. Under microscopy (40x) and using piezosurgical instruments, hydropneumatic sinus membrane elevation was performed, and a calcium sulphate solution was injected under the elevated antral membrane using a syringe. In the same surgical session, 4.00- to 6.50-mm-diameter implants were placed. Bone height at 12 months, complications related to the surgical technique, and implant failure were all recorded. Bone height at 12 months was 14.66 ± 1.48 mm, with a sinus membrane elevation of 9.01 ± 3.01 mm. Fifty-six implants were placed, and no failures were observed after 1 year. One macrolaceration and two microlacerations were the only complications related to the technique. Minimal invasiveness and reduced trauma characterize this new approach. In fact, gradual balloon inflation provides a controlled and atraumatic preparation of the sinus floor membrane. Piezoelectric instruments and microscopy make this technique predictable and safe. The relatively short learning curve of this approach for sinus floor elevation allows for its use in private practic
Disamina critica sui nuovi materiali per riabilitazioni su impianti e denti naturali: zirconia vs PMMA.
Full text linkHistologic and histomorphometric findings from retrieved, immediately occlusally loaded implants in humans
No full textComparative results of single implants with and without laser-microgrooved collar placed and loaded with different protocols: a long-term (7 to 10 years) retrospective multicenter study
No full textPURPOSE: This nonrandomized, retrospective multicenter study aimed to evaluate success rates, peri-implant marginal bone loss, and clinical parameters around single implants with and without laser-microgrooved collars placed and loaded using different protocols after 7 to 10 years of function. MATERIALS AND METHODS: A chart review was used to select patients treated at five private dental clinics with single dental implants with and without laser-microgrooved collars. Cumulative success rates, peri-implant marginal bone loss, probing depth, Plaque Index, bleeding on probing, and gingival recession were recorded at baseline examinations (ie, definitive restoration delivery) and at each year during the follow-up period. RESULTS: Three hundred single implants (140 without laser-microgrooved collars and 160 with 1.7-mm laser-microgrooved collars) in 300 patients were selected. At the completion of the study period, 26 patients and 26 implants (17 with and 9 without a laser-microgrooved collar) were classified as "dropouts." Implants and restorations were categorized into two subgroups each for a total of four study groups: group 1, immediate implant placement; group 2, delayed implant placement; group 3, immediate nonocclusal loading of prostheses; and group 4, delayed loading of prostheses. Nineteen implants (6.9%) failed clinically (4 [2.7%] with and 15 [11.4%] without a laser-microgrooved collar). The difference in cumulative success rates was statistically significant (P < .05). Radiographically, at the end of the follow-up period, the laser-microgrooved group showed a mean peri-implant marginal bone loss of 0.64 mm compared with 1.82 mm for the non-laser-microgrooved group. At the same time point, a mean probing depth of 0.76 mm was observed for the laser-microgrooved group compared with 2.75 mm for the non-laser-microgrooved group. A statistically significant difference in peri-implant marginal bone loss and probing depth between the two types of implant collars was evident (P < .05). No statistically significant correlation was noted between the types of implant placement/prosthetic restoration and clinical parameters. CONCLUSION: Implants with a laser-microgrooved collar appear to influence the peri-implant soft and hard tissue stability, reducing the probing depth levels and the peri-implant marginal bone loss by more than 50% after 10 years of function, regardless of the type of implant placement and loading protocol
Implantoprotesi in PMMA o composito su barra: considerazioni preliminari per un razionale approccio clinico sulla base dei dati finora a disposizione.
No full textProtesi implantari full-arch. Algoritmo decisionale per una scelta razionale del framework metallico e dei materiali di rivestimento estetico.
No full text
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
- …
