10.6084/m9.figshare.5718556.v1
Lauber José dos Santos Almeida Junior
Lauber José dos Santos
Almeida Junior
Karla Janilee de Souza Penha
Karla Janilee de Souza
Penha
Ana Ferreira Souza
Ana Ferreira
Souza
Estevam Carlos Oliveira Lula
Estevam Carlos Oliveira
Lula
Fernando Cintra Magalhães
Fernando Cintra
Magalhães
Darlon Martins Lima
Darlon Martins
Lima
Leily Macedo Firoozmand
Leily Macedo
Firoozmand
Is there correlation between polymerization shrinkage, gap formation, and void in bulk fill composites? A μCT study
SciELO journals
2017
Polymerization
X-ray Microtomography
Composite Resins
Imaging
Three-Dimensional
2017-12-20 02:42:06
Dataset
https://scielo.figshare.com/articles/dataset/Is_there_correlation_between_polymerization_shrinkage_gap_formation_and_void_in_bulk_fill_composites_A_CT_study/5718556
<div><p>Abstract: This in vitro study aimed to evaluate the volume of polymerization shrinkage (VS), gap (VG), and void (VV) using computerized microtomography (μCT) in bulk fill resin composites and conventional class I restorations, and to establish a correlation between these factors. Class I cavities (4 x 5 x 4 mm), C-factor = 4.2, were performed on caries-free human third molars and randomly divided into five groups (n = 6): FSI (Filtek Supreme XTE incremental insertion); FSS [(Filtek Supreme XTE single insertion(SI)]; TBF [(Tetric Bulk Fill: SI and manual filling (MF)]; SFM (Sonic Fill: SI/MF); and SFS (SonicFill: SI and sonic filling). The teeth were scanned and analyzed by μCT at T0, after filling the cavity with resin, and at T1, after polymerization for VG and VV, and for VS (T1-T0). There was statistically significant difference in VS in μCT for the FSI and FSS groups and between SFS and FSS as well as some difference in VV for FSI and bulk fill resin composites and no difference in VG between the conventional technique and bulk fill composites. Bulk fill resin composites presented similar VS and gap formation to those of incrementally inserted conventional resin composites. There is a moderate and weak positive correlation between polymerization shrinkage and gap formation and void, respectively. The final gap formation was more dependent on the initial gap than on polymerization shrinkage or void volume.</p></div>