Polymerization shrinkage, flexural and compression properties of low-shrinkage dental resin composites.
This study evaluated the polymerization shrinkage, flexural and compressive properties of low-shrinkage resin composites. For the study, four methacrylate-based and one silorane-based resin composites were light cured using three different light-curing units (LCUs) and their polymerization shrinkage, flexural (strength (FS) and modulus (FM)) and compressive (strength (CS) and modulus (CM)) properties were evaluated. Data were statistically analyzed using ANOVA and a post-hoc Tukey test. The polymerization shrinkage ranged approximately 7.6-14.2 μm for 2-mm thick specimens depending on the resin product and LCU. Filtek LS showed the least shrinkage while the rest shrank approximately 13.2-14.2 μm. However, Filtek LS showed the greatest shrinkage difference for the used LCUs. FS and CS of the tested specimens ranged 96.2-152.1 MPa and 239.2-288.4 MPa, respectively, depending on the resin product and LCU. The highest and lowest FS and FM were recorded for the methacrylate-based resin composites. Among the specimens, Filtek LS showed the lowest CS and CM.
Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute.
Jeong-Kil
JK
Park
Geun-Ho
GH
Lee
Jong-Hwa
JH
Kim
Mi-Gyoung
MG
Park
Ching-Chang
CC
Ko
Hyung-Il
HI
Kim
Yong Hoon
YH
Kwon
D003188:Composite Resins / Q000737:chemistry*; D055119:Elastic Modulus; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D058105:Polymerization; D013499:Surface Properties
C485363:Aelite LS; D003188:Composite Resins; C507124:Estelite sigma; C543062:Filtek LS Low Shrink resin; C509998:Grandio; C542517:Venus flow composite resin; C507210:premise composite resin