1,721,012 research outputs found
Orizzonti epigrafici di età romana nelle Alpi centrali
No full textLe epigrafi sono fonti insostituibili per la storia antica ed erano un importante mezzo di comunicazione in età romana: l’analisi di questo fenomeno è decisiva per meglio comprendere molti aspetti della romanità e della romanizzazione. Il concetto di “cultura epigrafica” è essenziale per le ricerche che considerano le iscrizioni non soltanto come fonti storiche, ma anche come testimonianze di un fenomeno sociale di comunicazione che si materializza contemporaneamente nel testo scritto e nel suo supporto. La storia e l’archeologia delle Alpi sono al centro di un interesse costantemente rinnovato: le ricerche in queste due discipline si sono evolute e si sviluppano in un’ottica interdisciplinare perché il contesto alpino, strettamente legato al territorio, domanda una forte interazione fra di esse. In questo contesto l’epigrafia, punto di contatto fra la cultura materiale e quella scritta, ha un ruolo importante. Le informazioni ricavate dalle iscrizioni e dai loro supporti sono state gestite mediante la banca dati ALPINITAS, appositamente creata, a partire dalla quale si sono potute definire varie categorie tematiche e poi, con un procedimento di seriazione, vari gruppi tipologici nella comunicazione epigrafica centroalpina. Questo ha poi permesso di riconoscere e definire diversi “orizzonti epigrafici” locali e regionali; capirne le origini, le particolarità, gli sviluppi e le relazioni reciproche permette di affacciarsi su dinamiche socioculturali più ampie
Reliability of dental calcification compared to hand-wrist X-ray to evaluate skeletal maturation in growing subjects: a systematic review
No full text
Halitosis: Literature review. First part
No full textHalitosis is a problem that may affect the quality of life, social relations in particular. Through a careful literature review, aetiological hypotheses, both oral and extraoral, on halitosis are highlighted as well as the dianostic and therapeutic approach that should be adopted by the dentist and the dental hygienist
Effetto della nicotina sulla produzione di gelatinasi B(MMP-9) in cheratinociti della mucosa orale
No full textVALUTAZIONE DELL’APERTURA BUCCALE IN SEGUITO ALL’UTILIZZO DEL COLLARE CERVICALE
No full textMovimenti mandibolari, elettrognatografia, collare cervical
La halitosis: Revisión de la literatura. Segunda parte
No full textHalitosis is a problem that may affect the quality of life, social relations in particular. Through a careful literature review, aetiological hypotheses, both oral and extraoral, on halitosis are highlighted as well as the dianostic and therapeutic approach that should be adopted by the dentist and the dental hygienist
Effect of air polishing with glycine powder on titanium abutment surfaces.
Full text linkObjective: The aim of the present study was to evaluate morphological changes induced by
glycine powder air polishing on titanium surfaces and its effect on bacteria recolonization in
comparison with sodium bicarbonate powder.
Materials and methods: 5 mm wide and 1 mm thick titanium grade II disks were divided into
three groups of treatments: (i) no treatment; (ii) air polishing with glycine powder; (iii) air
polishing with sodium bicarbonate powder. Specimens were characterized by laser profilometry,
scanning electron microscopy (SEM) and then installed onto removable appliances worn for 24 h
by healthy volunteers. Surface contamination was evaluated using SEM and counting the number
of colony forming units (CFU).
Results: SEM observation revealed an increased roughness with the formation of craters on
samples treated with sodium bicarbonate powder, while not in glycine ones. Statistical analysis
failed to show significant differences of both Ra and Rmax parameters in treated groups. SEM
observation of specimens surfaces, after 24 h of permanence in the oral cavity, showed a higher
contamination of the disks treated with sodium bicarbonate compared with those not treated
(P < 0.05). Conversely, the group treated with glycine showed the lower contamination if
compared with bicarbonate-treated group (P < 0.05).
Conclusions: Air polishing with glycine powder may be considered as a better method to remove
plaque from dental implant because glycine is less aggressive than sodium bicarbonate powder.
Moreover, the use of glycine powder seems to have an active role on the inhibition of bacterial
recolonization of implants in a short test period (24 h). Further studies are needed to demonstrate
the bacteriostatic properties of glycine, envisaged on the basis of reduced contamination of the
disks polished with glycine compared with those not treated
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
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