Reliable mechanical properties of dental cements are of significant importance to achieve durable crown cementation. This study investigated and compared several key properties of RelyX Luting Plus Automix (RLP-AMX, 3M ESPE), a new automix resin-modified glass-ionomer (RMGI) cement with other leading RMGI cements on market.
Methods:
Materials used were RelyX Luting Plus Automix (RLP-AMX, 3M ESPE), RelyX Luting Cement (RLC-HMX, 3M ESPE), RelyX Luting Plus Cement Clicker (RLP-HMX, 3M ESPE), and FujiCEM Automix (FC-AMX, GC). Diametral tensile strength (DTS), compressive strength (CS) and flexural strength (FS) samples were cured in glass tubes at 37oC and relative humidity of 95% for 1hr followed by storage in 37oC DI water for 23hrs before testing on an Instron.
Results:
The mean values of mechanical properties, including the standard deviations, are summarized in the following table:
Mechanical Properties Comparison for Different Products
Material |
Delivery Format |
DTS (MPa) |
CS (MPa) |
FS (MPa) |
RLP- AMX |
Automix paste-paste |
23+2.9 |
128+7 |
32+4.2 |
FC- AMX |
Automix paste-paste |
18+2.4 |
122+-3 |
34+1.9 |
RLC-HMX |
Handmix Powder/ Liquid |
24+2.6 |
110+13 |
36+2.2 |
RLP- HMX |
Handmix paste-paste |
23+1.2 |
142+8 |
31+0.7 |
Conclusions:
ANOVA analysis was performed at p <0.05. RLP-AMX, RLC-HMX and RLP-HMX had significantly higher diametral tensile strength compared with FC-AMX. There was no significant difference between RLP-AMX and FC-AMX for compressive strength and flexural strength. RLP-AMX had similar properties with other leading RMGI cements on the market.
Keywords: Cements, Dental materials and Glass ionomers
See more of: Dental Materials 7: Polymer-based Materials-Physical Properties and Performance