Abstract:
Objective
To study the corrosion behavior of three kinds of dental casting alloys and investigate the DNA damage of dog buccal mucosal cells caused by the released metal ions.
Methods
Three kinds of commonly-used dental casting alloys (pure Ti, Co-Cr-Mo and Ni-Cr) were used to make full crowns for dogs. The type and concentration of the released metal ions were measured by ICP-AES 2 weeks, 1 month, 2 months and 3 months after restoration. The DNA damage of buccal mucosal cells was studied by SCGE. Data were statistically analyzed by analysis of variance (ANOVA) and Spearman correlation.
Results
The metal ions released from Co-Cr-Mo and Ni-Cr were detected in buccal mucosal cells while the amount of the ions released from the pure Ti was too small to be detected. The DNA damage of mucosal cells increased with time after restoration of Ni-Cr crowns.
Conclusions
Pure Ti was the most corrosion-resistant among the three alloys. Pure Ti and Co-Cr-Mo showed no cytotoxicity.Ni-Cr alloy was prone to corrode and has cytotoxicity.
Key words:
Dental casting alloy,
Ion releasing,
Cells,
DNA
Jian-sheng SU, Zhi-juan TIAN, Shan GUO, Lei SHAO. Study of released metal ions of three kinds of dental casting alloy crowns and DNA damage of mucosal cells in vitro[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2008, 02(01): 36-40.