Objectives. Dental materials that can form apatite offer the potential to not only preventdemineralisation but enhance remineralisation of the enamel. The objective of this studywas to investigate the ability of a novel BAG-resin adhesive to form apatite in 3 immersionmedia.Methods. A novel fluoride containing BAG-resin adhesive described previously, with 80% byweight filler load, was used to fabricate 90 disks. Each disk was immersed in 10 ml of eithertris buffer (TB), or artificial saliva at pH = 7 (AS7) or pH = 4 (AS4). At ten time points (from 6 h to6 months), three disks were taken from each of the solutions and investigated by ATR-FTIR,XRD and SEM.Results. The BAG-resin formed apatite on the disk surface, which increased with time, espe-cially in AS4 and AS7. The apatite crystals formed in AS7 were highly oreintated and theoreintation increased with time.Significance. This novel BAG-resin adhesive differs from the currently used adhesives bypromting apatite formation, particularly under acidic conditions. Thus, applied in the clin-ical situation to bond orthodontic brackets, it may discourage the frequent occurrence ofwhite spot lesion formation around the brackets.