[The influence of nanometer inorganic filling carrying silver on the properties of composite resin].
OBJECTIVE
To observe the mechanical performance's effects of nanometer inorganic filling carrying silver on the properties of composite resin and find the perfect dose of the mixture.


METHODS
The resin was mixed with inorganic filling whose doses were 0.5%, 1.0%, 1.5% and 2.0%, and then the compressive strength, flexure strength and wear-resistance were measured in the five groups. One-way ANOVA and Student's t test were used for statistical analysis in SPSS 10.0.


RESULTS
The results showed that in the compressive strength tests, the 1.5% dose was perfect which was (264.93+/-12.48) MPa (P>0.05) and the 2.0% dose was bad which was (94.54+/-17.42) MPa (P<0.01); in the flexure strength tests, 0.5%, 1.0% and 1.5% dose didn't change significantly which were (86.25+/-12.76) MPa, (99.49+/-16.47) MPa and (108.69+/-10.35) MPa (P>0.05) respectively, and 2.0% dose went down significantly which was (79.79+/-8.10) MPa (P<0.01); in the wear-resistance tests, 1.5% and 2.0% worked very well which were (2.73+/-0.53) MPa (P<0.05), (2.70+/-1.25) MPa (P<0.01) respectively.


CONCLUSIONS
Nanometer inorganic filling had no significant influence on the composite resin, and 1.5% dose of nanometer inorganic filling is perfect for the resin's mechanical properties.
Zhang
Lin-qi
LQ
Department of Prosthodontics, Stomatological Hospital, Fourth Military Medical University, Xi'an 710032, Shanxi Province, China.
Gao
Bo
B
Tang
Li-hui
LH
Chen
Gang
G
D003188:Composite Resins; D019245:Compressive Strength; D003799:Dental Stress Analysis; D006801:Humans; D008422:Materials Testing; D012834:Silver
D003188:Composite Resins; D012834:Silver