2017 年 15 巻 1 号 p. 35-40
Developmental toxicity of chemical substances seriously impairs normal birth of human newborns. Corrosion resistance of titanium used in implant fixtures extremely decreases in the presence of fluorine ion produced by acidification. To our knowledge, cytotoxicity and developmental toxicity of corrosion products formed by corrosion of the titanium surface by fluoride have not been reported. Thus, we investigated differentiation and proliferation of ES-D3 cells, which is a parameter employed in the EST method. When the surfaces of JIS Class 1 and 2 titanium plates were corroded with hydrofluoric acid solution, cell differentiation and proliferation were affected. It was clarified that although this finding does not directly lead to clinical developmental toxicity, it is also necessary to investigate corrosion of titanium alloys used in implant fixtures.