[Amalgam. X. Glass-ionomer cement: a biocompatible substitute for amalgam?]

The biocompatibility of glass-ionomer depends upon the components released. The consequences of this releasing for the health of the pulp seem to be moderate, provided that there is a rather thick layer of dentin (> 1 mm) to protect the pulp. Glass-ionomer shrinks upon setting, but it adheres to the dental hard tissues. Yet, bacteria are found along and underneath the material. Systemic effects due to toxicity and allergy are largely unknown, possibly because glass-ionomer is a recent, as yet insufficiently investigated material.