Aim: To compare depth depth of cure, hardness, roughness and surface characteristics between 4 restorative paediatric materials: FUJI IX GP FAST, RivaSilver, SDR flow+,Vertise Flow. Methods: Depth of cure was calculated using the ISO 4049 standard. An acid attack simulation was made by immersing 6 samples of each material in an acid solution, then a toothpaste was applied, after that a second acidification cycle was provided. Samples of SDR and Vertise were brushed for 20 and 60 minutes. After each cycle, SEM images were collected, hardness was calculated through a Vickers indenter under 10N load and a 30s dwell time; surface roughness according to ISO 4288 and statistical differences were investigated. Results: Depth of cure of Vertise is statistically inferior to SDR. Hardness of brushed samples showed differences between Fuji, SDR and Vertise. Hardness of samples without treatment and with 60' of brushing was different for each material. Regarding roughness of samples subjected to acid treatments, RivaSilver and Vertise show a difference between untreated samples subjected to one and two acid cycles and for Vertise also between samples treated with acid and toothpaste. In all cases Rivasilver presented higher roughness values. SDR and Vertise showed roughness differences between samples brushed for 20' and 60'. Regarding samples brushed 20', Fuji shows the higher value, for those brushed 60' all materials showed significant difference, except for SDR and Vertise. Conclusions: Multiple acid attacks and prolonged brushing modifies surface characteristics of the investigated material.
Obiettivo: confrontare la profondità di polimerizzazione, la durezza, la rugosità e le caratteristiche di superficie tra 4 materiali pediatrici da restauro diretto: FUJI IX GP FAST, RivaSilver, SDR flow+, Vertise Flow. Metodi: La profondità di polimerizzazione è stata calcolata utilizzando lo standard ISO 4049. È stata effettuata una simulazione di attacco acido immergendo 6 campioni di ciascun materiale in una soluzione acida, quindi è stato applicato un dentifricio, dopodiché è stato previsto un secondo ciclo di acidificazione. I campioni di SDR e Vertise sono stati spazzolati per 20 e 60 minuti. Dopo ogni ciclo, sono state raccolte immagini SEM, la durezza è stata calcolata tramite un penetratore Vickers sotto un carico di 10 N e un tempo di permanenza di 30 secondi; sono state studiate la rugosità superficiale secondo la norma ISO 4288 e le differenze statistiche. Risultati: La profondità di polimerizzazione di Vertise è statisticamente inferiore a SDR. La durezza dei campioni spazzolati ha mostrato differenze tra Fuji, SDR e Vertise. La durezza dei campioni senza trattamento e con 60' di spazzolatura era diversa per ciascun materiale. Per quanto riguarda la rugosità dei campioni sottoposti a trattamenti acidi, RivaSilver e Vertise mostrano una differenza tra campioni non trattati sottoposti a uno e due cicli di acido e per Vertise anche tra campioni trattati con acido e dentifricio. In tutti i casi Rivasilver ha presentato valori di rugosità più elevati. SDR e Vertise hanno mostrato differenze di rugosità tra i campioni spazzolati per 20' e 60'. Per quanto riguarda i campioni da 20' spazzolati, Fuji mostra il valore più alto, per quelli da 60' spazzolati tutti i materiali hanno mostrato differenze significative, ad eccezione di SDR e Vertise. Conclusioni: Attacchi multipli di acidi e spazzolatura prolungata modificano le caratteristiche superficiali del materiale indagato.
Profondità di polimerizzazione, rugosità, durezza e caratteristiche di superficie di quattro materiali da restauro diretto in odontoiatria pediatrica
GUARISO, ANGELA
2023/2024
Abstract
Aim: To compare depth depth of cure, hardness, roughness and surface characteristics between 4 restorative paediatric materials: FUJI IX GP FAST, RivaSilver, SDR flow+,Vertise Flow. Methods: Depth of cure was calculated using the ISO 4049 standard. An acid attack simulation was made by immersing 6 samples of each material in an acid solution, then a toothpaste was applied, after that a second acidification cycle was provided. Samples of SDR and Vertise were brushed for 20 and 60 minutes. After each cycle, SEM images were collected, hardness was calculated through a Vickers indenter under 10N load and a 30s dwell time; surface roughness according to ISO 4288 and statistical differences were investigated. Results: Depth of cure of Vertise is statistically inferior to SDR. Hardness of brushed samples showed differences between Fuji, SDR and Vertise. Hardness of samples without treatment and with 60' of brushing was different for each material. Regarding roughness of samples subjected to acid treatments, RivaSilver and Vertise show a difference between untreated samples subjected to one and two acid cycles and for Vertise also between samples treated with acid and toothpaste. In all cases Rivasilver presented higher roughness values. SDR and Vertise showed roughness differences between samples brushed for 20' and 60'. Regarding samples brushed 20', Fuji shows the higher value, for those brushed 60' all materials showed significant difference, except for SDR and Vertise. Conclusions: Multiple acid attacks and prolonged brushing modifies surface characteristics of the investigated material.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/69145