Tom F T Ho, Roger J Smales.
Radiopacity of viscous Glass Ionomer Cement and Resin-Ionomer Restorative materials.
J Pak Dent Assoc Jan ;11(4):187-90.

OBJECTIVE: To investigate the radiopacities of newer viscous aesthetic glass ionomer cements (GICs) that may be used with the atraumatic restorative treatment (ART) approach, as compared with other conventional GICs, resin-modified GICs, compomers, and a resin composite. MATERIALS AND METHODS: Radiographs were taken of specimens placed in Teflon moulds, together with an attached aluminium stepwedge. Assessments were made by comparison of the radiopacities of the specimens with those of the stepwedge, and then the radiographs were sorted by rank into groups with approximately the same radiopacities. RESULTS: The newer viscous GICs should provide satisfactory clinical radiopacities when placed in different cavity locations and sizes in posterior teeth. The radiopacities of two other GICs were unsatisfactory. CONCLUSION: Posterior restorative materials should have radiopacities equal to or slightly greater than similar thicknesses of enamel, and the material samples tested should approximate the size of smaller carious lesions that need to be restored. The ISO 4049 standard for the radiopacity of resin-based restorative materials should be reviewed.

PakMediNet -Pakistan's largest Database of Pakistani Medical Journals - http://www.pakmedinet.com