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Is there correlation between polymerization shrinkage, gap formation, and void in bulk fill composites? A μCT study

Overview of attention for article published in Brazilian Oral Research, December 2017
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Title
Is there correlation between polymerization shrinkage, gap formation, and void in bulk fill composites? A μCT study
Published in
Brazilian Oral Research, December 2017
DOI 10.1590/1807-3107bor-2017.vol31.0100
Pubmed ID
Authors

Lauber José dos Santos Almeida, Karla Janilee de Souza Penha, Ana Ferreira Souza, Estevam Carlos Oliveira Lula, Fernando Cintra Magalhães, Darlon Martins Lima, Leily Macedo Firoozmand

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.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 77 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 77 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 15 19%
Student > Bachelor 6 8%
Student > Ph. D. Student 6 8%
Student > Doctoral Student 5 6%
Student > Postgraduate 5 6%
Other 14 18%
Unknown 26 34%
Readers by discipline Count As %
Medicine and Dentistry 39 51%
Materials Science 4 5%
Psychology 2 3%
Earth and Planetary Sciences 1 1%
Biochemistry, Genetics and Molecular Biology 1 1%
Other 2 3%
Unknown 28 36%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 22 December 2017.
All research outputs
#18,579,736
of 23,012,811 outputs
Outputs from Brazilian Oral Research
#254
of 451 outputs
Outputs of similar age
#328,261
of 439,953 outputs
Outputs of similar age from Brazilian Oral Research
#5
of 9 outputs
Altmetric has tracked 23,012,811 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 451 research outputs from this source. They receive a mean Attention Score of 1.9. This one is in the 26th percentile – i.e., 26% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 439,953 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 14th percentile – i.e., 14% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 9 others from the same source and published within six weeks on either side of this one. This one has scored higher than 4 of them.