1,721,006 research outputs found
La preparazione del margine cavitario in restauri diretti di denti anteriori: aspetti teorici.
No full text“La protezione pulpodentinale in Conservativa per mezzo di materiali intermedi”.
No full textLa polpa dentale risulta esposta a sollecitazioni di vario tipo e di vario grado sia nel corso della vita di relazione, sia soprattutto durante varie attività specialistiche odontoiatriche. Nel presente contributo viene presentata una ampia rivista della letteratura su: fisiologia, fisiopatologia e patologia del tessuto pulpare a seguito di stimolo; natura e forza degli stimoli che possono pervenire alla polpa (termici, elettrici, chimici, iatrogeni); materiali intermedi che interposti tra ricostruzione e tessuto dentinale possono annullare o diminuire l'intensità degli stimoli (lacche, vernici, liners, sottofondi a base di ossido di zinco eugenolo, ZOE rinforzati, ossifosfati di zinco, policarbossilati, cementi vetroionomeri). Vengono inoltre presentate tutte quelle attività preventive del danno che può svilupparsi a seguito della preparazione cavitaria o delle manovre di rifinitura e lucidatura degli amalgami. Una sezione del lavoro è particolarmente dedicata alle caratteristiche termiche dei tessuti duri dentali al fine di comprendere quanto questi possano fungere da isolanti o dissipatori del calore proveniente dall'esterno. Particolare enfasi è infine attuata nei confronti dell'efficacia del raffreddamento spray aria-acqua dipunte e frese montate su turbine e micromotori, maggiore causa di danno iatrogenico
Propedeutica Clinica Odontostomatologica
No full textLa figura dell’Odontoiatra: aspetti storici, legislativi, di insegnamento e professionali. L’organizzazione e gli strumenti di lavoro.
Introduzione alla prima visita odontostomatologica
Johann Baptist Spix and the “Lingula Mandibularis"
No full textJ.B. Ritter von Spix (1781-1826), a German zoologist, was famous in his time and highly honoured after making one of the first exploration voyages in the wildest part of Brazil.
But he was almost forgotten until, nearly two centuries after his birth, some illuminated biographers brought him to a new life in the biological and zoological field.
However he has never been forgotten in the odontostomatologic field thanks to his discovery of the “Lingula Mandibularis” also known as “Spine of Spix”.
The purposes of this work are to present some biographical notes on J.B. Ritter von Spix, to explain why the “ Lingula Mandibularis” has been called by the name of Spix and why this eponym has spread so much
Appendectomy during the COVID-19 pandemic in Italy: a multicenter ambispective cohort study by the Italian Society of Endoscopic Surgery and new technologies (the CRAC study)
No full textMajor surgical societies advised using non-operative management of appendicitis and suggested against laparoscopy during the COVID-19 pandemic. The hypothesis is that a signifcant reduction in the number of emergent appendectomies was
observed during the pandemic, restricted to complex cases. The study aimed to analyse emergent surgical appendectomies
during pandemic on a national basis and compare it to the same period of the previous year. This is a multicentre, retrospective, observational study investigating the outcomes of patients undergoing emergent appendectomy in March–April
2019 vs March–April 2020. The primary outcome was the number of appendectomies performed, classifed according to
the American Association for the Surgery of Trauma (AAST) score. Secondary outcomes were the type of surgical technique employed (laparoscopic vs open) and the complication rates. One thousand fve hundred forty one patients with acute
appendicitis underwent surgery during the two study periods. 1337 (86.8%) patients met the inclusion criteria: 546 (40.8%)
patients underwent surgery for acute appendicitis in 2020 and 791 (59.2%) in 2019. According to AAST, patients with complicated appendicitis operated in 2019 were 30.3% vs 39.9% in 2020 (p=0.001). We observed an increase in the number of
post-operative complications in 2020 (15.9%) compared to 2019 (9.6%) (p<0.001). The following determinants increased
the likelihood of complication occurrence: undergoing surgery during 2020 (+67%), the increase of a unit in the AAST
score (+26%), surgery performed>24 h after admission (+58%), open surgery (+112%) and conversion to open surgery
(+166%). In Italian hospitals, in March and April 2020, the number of appendectomies has drastically dropped. During
the frst pandemic wave, patients undergoing surgery were more frequently afected by more severe appendicitis than the
previous year’s timeframe and experienced a higher number of complications. Trial registration number and date: Research
Registry ID 5789, May 7th, 202
Rilascio di bisfenolo A dai sigillanti
No full textI materiali a base resinosa sono la scelta predominante tra i sigillanti dentali. Attraverso un’analisi della letteratura recente e un contributo sperimentale è stato valutato il loro potenziale rilascio di BPA nella saliva, molecola dalle note proprietà estrogenich
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