title: Long-term monitoring of microleakage of dental cements by radiochemical diffusion.
abstract: Radioactive 14C sucrose was found to be an ideal marker for microleakage because it did not penetrate tooth tissue, dental cement, or mounting resin. The main finding is that the adhesive cements--the glass-ionomer and polycarboxylate--are significantly more effective at preventing microleakage than are the traditional phosphate cements--silicate and zinc phosphate. The differences can be as high as two orders of magnitude. The adhesive cements provide almost perfect and reliable seals. By contrast, the nonadhesive cements are erratic sealants with most of the restorations leaking.
mesh_terms: D002250:Carbon Radioisotopes; D001840:Dental Bonding; D003738:Dental Cements; D003743:Dental Enamel; D003763:Dental Leakage / Q000175:diagnosis*; D003793:Dental Restoration, Permanent; D004058:Diffusion; D005899:Glass Ionomer Cements; D006801:Humans; D011076:Polycarboxylate Cement; D012823:Silicate Cement; D013395:Sucrose; D013997:Time Factors; D015036:Zinc Phosphate Cement
chemical_list: D002250:Carbon Radioisotopes; D003738:Dental Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; D012823:Silicate Cement; D013395:Sucrose; D015036:Zinc Phosphate Cement