A new self-curing resin-modified glass-ionomer cement for the direct bonding of orthodontic brackets in vivo.

A new self-curing (chemically cured) resin-modified glass-ionomer cement, Fuji Ortho (GC International), is based on the technology of hybrid glass-ionomer restorative materials and features chemical adhesion to tooth structure and long-term fluoride release. This article describes a 12-month clinical evaluation of Fuji Ortho for the direct bonding of orthodontic (metal) brackets with System 1+ (Ormco Corp.) as a control. Three failures of Fuji Ortho occurred from a sample of 60 (5%), with five failures of the composite resin from a sample of 60 (8.3%). No statistical significance was seen between these results. Fuji Ortho is a satisfactory adhesive for the direct bonding of orthodontic brackets where there are no occlusal interferences.