Polymerization shrinkage of light-cured conventional and bulk-fill composites - the effect of cavity depth and post-curing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00064165%3A_____%2F23%3A10451544" target="_blank" >RIV/00064165:_____/23:10451544 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11110/23:10451544

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vjPhc5qvM_" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vjPhc5qvM_</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4012/dmj.2022-210" target="_blank" >10.4012/dmj.2022-210</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polymerization shrinkage of light-cured conventional and bulk-fill composites - the effect of cavity depth and post-curing

Popis výsledku v původním jazyce

Volumetric shrinkage (VS) of conventional, bulk-fill, and core build-up resin-based composites (RBCs) of various thickness (1-5mm) was measured using the modified bonded-disk method with confocal laser scanning microscopy. Additionally, the bottom-to-top ratio of Vickers hardness (%VH) was measured. Conventional RBCs exhibited significantly higher VS than bulk-fill and core build-up RBCs (p&lt;0.05). As specimen thickness increased, VS relative to volume (%VS) and difference in VS at each depth (VSdepth) decreased. For conventional RBCs, there was a significant drop in VSdepth between 1mm and 2mm (p&lt;0.05), and another drop was observed between 3mm and 4mm (p&lt;0.05) where %VH decreased below 90%. For bulk-fill and core build-up RBCs, VSdepth decreased significantly between 2mm and 3mm (p&lt;0.05), but %VH exceeded 90% even in 5mm deep cavities. These results indicated that post-curing contributed to lower shrinkage in deeper layers, and that conventional RBCs were not adequately polymerized at the depth of over 3mm.

Název v anglickém jazyce

Polymerization shrinkage of light-cured conventional and bulk-fill composites - the effect of cavity depth and post-curing

Popis výsledku anglicky

Volumetric shrinkage (VS) of conventional, bulk-fill, and core build-up resin-based composites (RBCs) of various thickness (1-5mm) was measured using the modified bonded-disk method with confocal laser scanning microscopy. Additionally, the bottom-to-top ratio of Vickers hardness (%VH) was measured. Conventional RBCs exhibited significantly higher VS than bulk-fill and core build-up RBCs (p&lt;0.05). As specimen thickness increased, VS relative to volume (%VS) and difference in VS at each depth (VSdepth) decreased. For conventional RBCs, there was a significant drop in VSdepth between 1mm and 2mm (p&lt;0.05), and another drop was observed between 3mm and 4mm (p&lt;0.05) where %VH decreased below 90%. For bulk-fill and core build-up RBCs, VSdepth decreased significantly between 2mm and 3mm (p&lt;0.05), but %VH exceeded 90% even in 5mm deep cavities. These results indicated that post-curing contributed to lower shrinkage in deeper layers, and that conventional RBCs were not adequately polymerized at the depth of over 3mm.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30208 - Dentistry, oral surgery and medicine

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Dental Materials Journal

ISSN

0287-4547

e-ISSN

1881-1361

Svazek periodika

42

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

7

Strana od-do

426-432

Kód UT WoS článku

001081896700016

EID výsledku v databázi Scopus

2-s2.0-85160966535