Effect of Light-Curing Unit Type and Bulk-Fill Composite Resins with Different Photoinitiators on Marginal Gaps of Class II Restorations
Pesqui. bras. odontopediatria clín. integr
; 22: e210110, 2022. tab, graf
Article
in English
| LILACS, BBO - Dentistry
| ID: biblio-1422262
Responsible library:
BR1264.1
ABSTRACT
Abstract Objective:
To evaluate the effect of two types of light-curing units (second and third generations) and two types of bulk-fill composite resins with different photoinitiators - Tetric N-Ceram Bulk Fill (TNCB) and Xtra Fil (XTF) on gap formation at the gingival margins of Cl II restorations. Material andMethods:
Fifty-six standard Cl II cavities were prepared on the mesial and distal surfaces of premolar teeth, with the gingival margin of the cavities 1 mm apical to the CEJ. The samples were randomly assigned to two groups based on the composite resin type and two subgroups based on the light-curing unit type and restored. After 5000 rounds of thermocycling, gingival margin gap in each sample was measured in µm under an electron microscope at ×2000 magnification. Data were analyzed by two-way ANOVA and Tukey tests (α=0.05).Results:
Marginal gaps of TNCB composite resin were significantly smaller than those of XTF composite resin (p<0.001). There were no significant differences between the two light-curing units in each group (p=0.887 with XTF and p=0.999 with TNCB).Conclusion:
The gaps at gingival margins of Cl II cavities with TNCB bulk-fill composite were smaller than XTF composite resin. Both composite resins can be cured with both the second- and third-generation LEDs (AU).
Full text:
Available
Collection:
International databases
Database:
BBO - Dentistry
/
LILACS
Main subject:
Bicuspid
/
Dental Marginal Adaptation
/
Composite Resins
/
Light-Curing of Dental Adhesives
/
Photoinitiators, Dental
Type of study:
Evaluation study
Limits:
Humans
Language:
English
Journal:
Pesqui. bras. odontopediatria clín. integr
Journal subject:
Dentistry
Year:
2022
Document type:
Article
Affiliation country:
Iran
Institution/Affiliation country:
Guilan University of Medical Sciences/IR
/
International branch of Guilan University of Medical Sciences/IR