website: AADR 37th Annual Meeting

ABSTRACT: 0846  

Strength of a New Protective Coating

K.M. CUMMINGS, and R.P. RUSIN, 3M ESPE Dental Products, Saint Paul, MN, USA

Objective:  Compare the compressive strength (CS) and diametral tensile strength (DTS) of different glass ionomer materials used to seal dentin.  The materials used were one experimental material (EXP), and commercial materials:  3M™ ESPE™ Vitrebond™ Plus Liner/Base (VBP), and  GC Fuji™ Triage (FT).  EXP is a resin-modified glass ionomer coating material in a paste/paste delivery.

Methods:   Samples were cured in 4mm diameter glass tubes with the paste held under axial compression, then cut to 8mm (CS) and 2mm (DTS) in length.   Specimens were conditioned in de-ionized water at 37 °C for 24 hours prior to testing on an Instron machine.  Data were analyzed via one-way ANOVA and compared with Tukey's T-test (p<0.05).

Results:  CS and DTS in MPa  are shown below.

 

CS(stdev)

DTS(stdev)

EXP

119.6(8.4)

26.8(3.1)

FT

108.3(46.6)

15.8(2.3)

VBP

106.1(8.5)

21.5(3.2)

Conclusions:  CS was not statistically different for all materials;  DTS was not statistically different for all materials.  EXP has physical properties suitable for providing a coating to seal dentin

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