In vitro Comparison of Zinc Phosphate and Glass Ionomers Ability to Inhibit Decalcification under and Adjacent to Orthodontic Bands

摘要

Forty sets of impacted third molar teeth were banded with custom fitted bands and cycled in a latic acid solution for four weeks. This solution simulates an environment that would be found only in patients with the worst oral hygiene. Each set was from the same patient. Visual, spectrophotometric and pH testing were done on the sample sets. All area not banded showed significant decalcification after four weeks in the 0.10M latic acid solution. The teeth banded with glass ionomer cement showed significantly more calcium was present in solution in the zinc phosphate cemented sample solutions also confirmed more Ca(++) ions in solution. The evidence suggest that glass ionomer cement protects the tooth surfaces from decalcification under and adjacent to orthodontic bands significantly better than zinc phosphate cements. Further study on solubility and setting time of this new glass ionomer cement is necessary before routine clinical use can be considered. (Author)