[Study on the mechanical properties of quartz fiber-reinforced composite for canal post].
OBJECTIVE
To study the mechanical properties of custom-made quartz fiber-reinforced epoxy resin composite for prefabricated post.


METHODS
Composite rods of 5 experiment groups with different fiber contents were made of quartz fiber and epoxy resin.Flexural strengths, shear strengths and fiber contents were measured, corresponding elastic modulus were calculated, cross-section surface and fracture surface was viewed under SEM. Statistical analysis was carried out with one way analysis of variance(ANOVA) and Student-Newman-Keuls for the experimental groups.


RESULTS
The flexural strength of composite rods increased with the increase of fiber content, within the limitations of this research, the flexural strengths ranged from 741 to 1165 MPa, corresponding fiber contents ranged from 53.3 to 78.6 Wt%, corresponding flexural strengths ranged from 36.7 to 50.4 MPa,corresponding elastic modulus ranged from 30.6 to 51.9 GPa, SEM showed that fiber distribution in resin was uniform, there was good adhesion between fiber and epoxy resin. ANOVA revealed significant differences of flexural strengths and shear strengths between the experimental groups and control group (P<0.01), Student-Newman-Keuls analysis showed significant differences of flexural strengths and shear strengths between the experimental groups(P<0.01).


CONCLUSIONS
The custom-made quartz fiber-reinforced epoxy resin composite can be used for prefabricated post with good mechanical properties.
Wu
Yue-mei
YM
Department of Prosthodontics, School of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
Zhang
Fu-qiang
FQ
Song
Ning
N
Ni
Li-zhong
LZ
D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials; D003799:Dental Stress Analysis; D004853:Epoxy Resins / Q000737:chemistry*; D008422:Materials Testing; D018583:Pliability; D011176:Post and Core Technique / Q000295:instrumentation*; D011791:Quartz / Q000737:chemistry*; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties
D003188:Composite Resins; D003764:Dental Materials; D004853:Epoxy Resins; D011791:Quartz