Pregnancy can theoretically repair teeth, clinically for dental fillings mainly for relatively early caries, this kind of caries does not need root canal treatment, at the same time there is no obvious pain symptoms, but only clinically found that the color and texture of the teeth change. At this time, the application of high-speed turbine drill to remove the carious part of the caries, the application of dental special filling materials, a process of filling it. The operation itself is not obviously painful, and there is no systemic application of drugs for pregnant women, so there is no direct impact on pregnant women. Clinical dental treatment for pregnant women, as far as possible, mainly conservative, to reduce invasive bleeding operation, while trying to avoid systemic application of drugs.