A resin-modified glass ionomer restorative: three-year clinical results

Resin modified glass ionomer (RMGI) restorative materials have gained popularity in recent years. Their use is most often indicated in Class III and Class V cavities in adults and in numerous applications in children. This popularity in use has taken place in the absence of scientific knowledge of the RMGI materials. Lacking are adequate clinical trials to validate the proposed indications. The purpose of this study was to examine a representative RMGI in cervical abrasions and root caries in adults. Patients were recalled up to three years to evaluate standard clinical criteria. Results found the RMGI to be inferior to conventional composite resin in similar applications. The most noted deficiencies were in color stability and anatomic form, or wear of the RMGI. The results of this prospective clinical trial would suggest a limited longevity for RMGI compared to traditional restorative materials. This study also reinforces the need for evidence of clinical performance prior to making decisions regarding material selections.