Objective: The purpose of this study is to demonstrate that for the first time, new advanced GI cements can meet the physical property requirements of both the GI normative standard (ISO 9917;1991) and the amalgam normative standard (ISO 1559;2001).
Methods: ISO standards. Materials used;
A-GI = Amalgomer™ GI (lot 090213-1, expiry 9/2004)
A-CR = Amalgomer™-CR ceramic reinforced GI (lot 100223-4, expiry 10/2004)
[both from Advanced Healthcare Ltd].
Results:
| ISO property | ISO limit | A-GI | A-CR |
| ISO 9917 Compressive strength – 24 hours Acid jet erosion |
>130 MPa <0.05 mm/hr |
330 MPa 0.002 mm/hr |
346 MPa 0.0009 mm/hr |
| ISO 1559 Compressive strength - 1 hour - 24 hours Creep Dimensional stability |
>50 MPa >300 MPa <3% -0.15% to +0.20% |
164 MPa 330 MPa 0.05% +0.10% |
215 MPa 346 MPa 0.02% +0.03% |
Conclusions: The new Amalgomer glass ionomer cements offer dental professionals the established benefits of glass ionomers (fluoride release, biocompatibility, natural adhesion to tooth structure, excellent aesthetics) combined with the strength of amalgam.