Microleakage of the Gluma system

The Gluma dentin-enamel bonding system consists of an enamel etchant, a dentin cleanser, a dentin primer and an unfilled hydrophobic resin adhesive. The primer contains HEMA and glutaraldehyde. This study examined the microleakage of the Gluma system itself and the effects of (1) substituting the primer for one not containing glutaraldehyde and (2) substituting a hydrophilic resin adhesive for the hydrophobic adhesive in the Gluma kit. Removal of the glutaraldehyde from the primer had no effect on the microleakage but substitution of a hydrophilic adhesive resulted in a significant reduction in microleakage.