[Rheological properties of photo-polymerized composite resin reinforced with retentive filler].
OBJECTIVE
To determine the rheological properties of the photo-polymerized composite resin reinforced with retentive filler (RF) and its rheological difference with normal filler (NF) composite resin.


METHODS
Rheological properties of the composite resins, such as viscosity, shear stress and creep compliance, were measured with dynamic stress rheometer at room temperature (25 degrees C).


RESULTS
The viscosity of the composite resin reinforced with RF is higher than that of NF composite resin (P < 0.01); at the beginning, the viscosity of the former has little change with the rising of shear stress and the latter decreases, then the viscosities of the two composite resins increase with the rising of shear stress as soon as over 203.18 Pa of shear stress; the creep compliance of the composite resin reinforced with RF is significant smaller than that of NF composite resin (P < 0.01).


CONCLUSIONS
The rheological properties of the two composite resins have significant difference, so they have different clinical using properties.
Xu
Pu
P
Department of Stomatology, Haikou People's Hospital, Haikou 570208, China.
Xu
Heng-chang
HC
Wang
Tong
T
D003188:Composite Resins / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D014783:Viscosity
D003188:Composite Resins