1205 Mechanical Properties of a Novel Automix Resin-Modified Glass-Ionomer Luting Cement

Saturday, March 24, 2012: 8 a.m. - 9:30 a.m.
Presentation Type: Oral Session
Y. WANG1, T. TON1, A. FALSAFI1, T. TRAN1, and J. OXMAN2, 13M ESPE Dental Products, Saint Paul, MN, 23M ESPE, St. Paul, MN
Objectives:

 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
Presenting author's disclosure statement: employment 3M ESPE
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