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Incorporation of amorphous calcium phosphate (ACP) into glass ionomer cement: influence on microleakage of cemented orthodontic bands

Aim: With regard to the anticariogenic and remineralizing properties of ACP, the aim of this study was to compare the microleakage of conventional glass ionomer and ACP containing glass ionomer cements under orthodontic bands.

Materials and Methods: Sixty extracted first maxillary premolars were randomly divided into 2 groups. In the group A, the teeth were cemented by conventional glass ionomer cement and in the group B they were cemented by ACP containing glass ionomer cement. Then samples subjected to thermocycling. A dye penetration method was used for microleakage evaluation. Microleakage was determined with a stereomicroscope for the cement-band and cement-enamel interfaces from the buccal and lingual sides at the occlusal and gingival margins.

Results: Post hoc comparisons showed amount of microleakage in the control group was significantly higher than experimental group in cement-enamel interface at bucco-gingival level (p-value=0.01). No significant difference between control and experimental groups was observed in other areas.

Conclusion: ACP containing glass ionomer causes less microleakage than conventional glass ionomer in enamel-cement interface. However there was no significant difference in microleakage between ACP containing GI and conventional GI in most of area. Therefore ACP-containing GI can be used in orthodontic banding.

Author(s): Maryam Omidkhoda, Farzin Heravi, Shideh Gharaei, Abdolrasoul Rangrazi, Tabassom Hooshmand