Effect of flowability on the flow rate, polymerization shrinkage, and mass change of flowable composites.
As a lining or restoration material, flowable composites are popular due to their ease in use and agreeable marginal adaptation of tooth cavity. The purpose of the present study was to evaluate various properties of flowable composites which were claimed to be of high or low flowability by the manufacturers. For the study, twelve flowable composites from six different manufacturers were used. Based on the manufacturers' claim, they were divided into two groups: high or low flowability. The products grouped in high flowability showed significantly higher (p<0.05) flow rate (flow distance), polymerization shrinkage, and microhardness (on the top surface), regardless of light-curing unit, than those grouped in low flowability. On the other hand, water sorption and solubility showed nonsignificantly different values regardless of flowability. Through the study, flow rate had low correlation with microhardness (R<0.23), polymerization shrinkage (R<0.60), and water sorption and solubility (R<0.36) regardless of light-curing unit.
Department of Dental Materials, School of Dentistry and Medical Research Institute, Pusan National University.
Ri-Mo
RM
Ku
Ching-Chang
CC
Ko
Chang-Mo
CM
Jeong
Mi-Gyoung
MG
Park
Hyung-Il
HI
Kim
Yong Hoon
YH
Kwon
D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials; D055115:Light-Curing of Dental Adhesives / Q000379:methods*; D008422:Materials Testing; D013499:Surface Properties
D003188:Composite Resins; D003764:Dental Materials; C111840:flowable hybrid composite