Is there correlation between polymerization shrinkage, gap formation, and void in bulk fill composites? A µCT study
Braz. oral res. (Online)
;
31: e100, 2017. tab, graf
Article
in English
| LILACS
| ID: biblio-952116
ABSTRACT
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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Composite Resins
/
Dental Restoration, Permanent
/
Polymerization
Type of study:
Evaluation studies
Limits:
Humans
Language:
English
Journal:
Braz. oral res. (Online)
Journal subject:
Dentistry
Year:
2017
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Government Dental Practice/BR
/
Universidade Estadual Paulista "Júlio de Mesquita Filho" - Unesp/BR
/
Universidade Federal do Maranhão - UFMA/BR
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