1,721,119 research outputs found
Utilizzo di Mineral Trioxide Aggregate nella riparazione di perforazioni della forcazione: due casi clinici
No full textAims: Mineral Trioxide Aggregate (MTA), a Portland Cement-like materi- al, developed in 1993 by M. Torabine- jad, has been suggested in the treat- ment of furcal perforation. The aim of this study is to describe two case reports of teeth with furcal perforation treated with mineral trioxide aggre- gate.
Clinical cases: two molars with a furcal perforation, due to decay and iatro- genic mistake, respectively, were treated with Mineral Trioxide Aggregate during the conventional retreatment. Clinical and radiological controls show the healing of periodontal tissues.
Conclusions: the MTA seems to be the best material in the treatment of furcal perforation. Its excellent action may be connected with highly reduced quantity of liquid and bacterial leak- age, and this clinical condition seems to allow the healing of periodontal tissues
Isolation through rubber dam to prevent COVID-19 exposure during flapless trans-crestal sinus lift procedures
No full textIn 2020, a highly infective new pathogen (Sars-CoV-2) spread from China to the whole globe, and became responsible of an acute respiratory syndrome, often asymptomatic but potentially lethal, named COVID-19. Airborne and direct contact contamination are the major infection pathways of Sars-CoV-2 and it has been shown that virus spread can also happen in absence of clinical symptoms. SARS-CoV-2 transmission during dental procedures can happen through inhalation of droplets from infected patients or direct contact with mucous membranes, oral fluids, and contaminated instruments. Both sinus lift and implant surgeries often involve bleeding and exposure to oral fluids, and a rubber dam could be used to reduce direct contact and the amount of potentially infected aerosol. The aim of this short case presentation is to illustrate how the use of a rubber dam could be extremely useful in preventing COVID-19 exposure during flapless trans-crestal sinus lift procedures
Oral pemphigus
No full textThe involvement of the oral mucosa in patients affected by pemphigus vulgaris (PV), paraneoplastic, IgA pemphigus, and in some cases iatrogenic pemphigus is common and often a prelude to skin lesions. Intraepidermal bullae are caused by acantholysis, induced by IgG autoantibodies directed against the desmosomes and the domain of numerous keratinocytes self-antigens desmogleins (namely cadherins), thus supporting the autoimmune nature of the disease. Apoptosis may contribute to the acantholysis. Oral mucosal lesions are more commonly refractory to treatment compared to skin lesions and have been associated with disease duration, disease location and possibly the presence of HSV DNA in the oral cavity. Recent publications have stressed the positive role of Rituximab in early disease treatment
Endodonzia chirurgica
No full textDopo una breve introduzione e definizione di endodonzia chirurgica, il capitolo di questo libro espone le indicazioni e le controindicazioni a questo intervento secondo i dati più aggiornati della letteratura scientifica del settore. La tecnica endodontico-chirurgica è descritta dettagliatamente step by step
Chirurgia piezoelettrica
No full textIl capitolo si apre con alcuni cenni storici inerenti l'utilizzo degli ultrasuoni in odontoiatria fino ad arrivare alla definizione della moderna chirurgia ossea piezoelettrica. I vantaggi e le caratteristiche cliniche peculiari della chirurgia piezoelettrica sono descritte nella prima parte del testo che prosegue con la dissertazione dei protocolli operativi in chirurgia orale. Diverse figure e disegni corredate di didascalie permettono al lettore di comprendere i passaggi per ogni tipologia di intervento eseguito con tecnica piezoelettrica
Avulsione dentale e rivascolarizzazione pulpare in seguito a reimpianto: caso clinico.
No full textLo scopo di questo studio è quello di presentare un caso clinico di rivascolarizzazione pulpare in seguito a reimpianto dentale.Il paziente, di 9 anni, presenta entrambi gli incisivi centrali superiori avulsi in seguito ad un incidente sportivo.Giunge all’osservazione 30 minuti dopo il trauma, con gli elementi dentari conservati in soluzione fisiologica sin dai primi istanti. Entrambi gli elementi presentano apice beante e non completa formazione della radice.Seguendo le linee guida della IADT si decide di reimpiantare gli elementi e di eseguire uno splintaggio semi-flessibile.Si eseguono successivi controlli clinici e radiografici a 1-3-6-12 e 24 mesi.Nei denti con incompleta formazione radicolare è possibile andare incontro a rivascolarizzazione; tuttavia i test elettrici e termici non sono affidabili in seguito a traumi dentali, in quanto possono dare falsi negativi. La valutazione clinica di un dente traumatizzato però richiede uno studio sintomatico, visivo e radiografico. Se il dente diviene necrotico o infetto si può andare incontro ad un processo di riassorbimento radicolare che può condurre alla perdita del dente in breve tempo.Una diminuzione della dimensione della camera pulpare o del canale radicolare sull’immagine radiografica è un segno affidabile della vitalità pulpare.Il caso discusso rappresenta la possibilità di rivascolarizzazione in seguito a reimpianto a breve termine
Riabilitazione funzionale del settore posteriore tramite ricostruzione indiretta: case reprt
No full textVedasi l'allegat
Canal shaping with WaveOne reciprocating files: influence of operator experience on instrument breakage and canal preparation time
No full textThe aim of this study was to determine the fracture incidence of WaveOne Primary reciprocating files and the time required for shaping of curved canals based on the experience of the operator. A total of 109 mesiobuccal canals of permanent molars extracted with an angle of curvature of[25°–45° according to Schneider were ran- domly assigned to four groups. An experienced operator (endodontist) and an inexperienced operator (student) each shaped one of two groups: one with the instrument WaveOne Primary to WL and the other after creation of a glide path with PathFile 1, 2 and 3 at the WL. Any frac- tures or visible deformations of the instruments during the shaping phase and the effective time required to prepare the canals for each instrument were recorded. No visible deformation or fracture was observed. The experienced operator tended to finish their shape faster than the inex- perienced operator regardless of the technique applied. For the inexperienced operator, the usage time with only WaveOne Primary was significantly lower when the canals were preliminarily instrumented with the PathFile than when these instruments were not used (average time, 22.03 vs. 36.22 s, respectively; p \ 0.001). The experience of the operator did not influence fracture of the WaveOne Pri- mary instruments. The time required to prepare the canals was instead inversely proportional to the experience of the operator. However, the creation of a glide path with PathFile instruments reduced the time required by the inexperienced operator to prepare the canal
Effectivness of cleaning procedures on rotary nickel-titanium files: a SEM analysis.
No full textAIM:The purpose of the present study was to quantify the surface debris on endodontic nickel-titanium rotary files after cleaning procedures.MATERIALS AND METHODS:Rotary nickel-titanium files (ProFiles and MTwo) were examined after removal from the packaging, after instrumentation in human teeth, and after various cleaning procedures. The cleaning procedures consisted of either ultrasonication with the files placed in a perforated container or ultrasonication with the files loosely placed in a beaker, with various cleaning agents. The presence of debris was evaluated using scanning electron microscopy. Specimens were scored accordingly to a 0-4 scale by two independent observers, whose agreement was previously evaluated using Cohen-K test. Data were analyzed with Kruskal Wallis and Mann-Whitney test for significativity. RESULTS:Some files were delivered from the factory with machining debris. The effectiveness of cleaning procedures with or without enzymatic products was different with p<0,001. Cleaning the files by ultrasonication within a container did not consistently achieve complete removal of debris. Placing the files loosely in the ultrasonic bath achieved the most effective cleaning.CONCLUSIONS:A conventional cleaning method is capable of effectively removing debris from endodontic files
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