Is it safe to fill a dental cavity during pregnancy?

Dental filling refers to the treatment of filling carious cavities. Generally, whether dental fillings can be performed during pregnancy mainly depends on the stage of pregnancy and the severity of the cavity. If it is the first or last trimester of pregnancy, or if the cavity is large, filling is usually not recommended. However, if it is the 4th to 6th month of pregnancy and the cavity is small, dental filling can be performed under a doctor's guidance.

During the first trimester, the embryo's implantation is not yet stable. Dental treatment during this period, including the pain and stress involved, may cause hormonal fluctuations in the pregnant woman and increase the risk of miscarriage. In the last trimester, the physical burden on the pregnant woman increases, and her abdomen enlarges significantly. Lying in the dental chair for an extended period during treatment may cause discomfort and improper positioning might stimulate uterine contractions, increasing the risk of premature labor.

Moreover, large cavities usually indicate deep decay, possibly approaching or already affecting the dental pulp. In such cases, the filling procedure is more complex and may involve complicated treatments like root canal therapy. The prolonged treatment time and significant pain or discomfort can easily trigger physiological and psychological stress responses in the pregnant woman, which may be harmful to the fetus.

However, during months 4 to 6 of pregnancy, which is a relatively stable period, fetal development is more stable, and the risks of miscarriage and preterm labor are significantly reduced. Small cavities require relatively simple procedures, shorter treatment times, and cause minimal discomfort, which pregnant women can generally tolerate well. Furthermore, under strict evaluation and procedures by a qualified dentist, using safe filling materials and avoiding harmful medications can effectively repair the cavity, prevent further progression of dental decay, and ensure the safety of both mother and fetus.

If a pregnant woman experiences oral health issues during pregnancy, she should not delay treatment but instead promptly consult a dental professional to develop an individualized treatment plan to maintain good oral health.