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Local anaesthesia & pregnancy

by Kim Loos

question
Last week I had my tooth prepared for a crown. This involved having quite a bit of anaesthetic on the gum surrounding my tooth. This morning I discovered I am about five weeks pregnant. Is it possible that the anaesthetic at this early stage will harm my baby?

answer
Receiving dental treatment during pregnancy is not considered to be taboo any more. However, surveys of obstetricians show that they prefer dental treatment to take place during the second trimester, if possible. During the first trimester, organ development of the foetus is taking place. During the third trimester, it can be uncomfortable for the mother to lie back in the dental chair, especially for an extended period of time. In addition, if it is a particularly stressful situation for the mother there is the slight possibility that premature labour may be induced.

The local anaesthetic should not worry you. In fact, only a very low percentage of the obstetricians surveyed wished to be consulted prior to the administration of a local anaesthetic. The main concerns are X-rays and certain types of medication that might be prescribed during the course of dental treatment. X-rays or radiographs during pregnancy, especially during the first trimester, should be kept to an absolute minimum. The antibiotics we generally use in dentistry — penicillin and derivatives thereof — are usually fine for the developing foetus. Special attention should be taken if analgesics are prescribed, however.

While receiving dental care during pregnancy usually isn’t a problem for the developing foetus, elective dentistry should be postponed until after the baby is born. The exception to this might be to have a clean and check-up during the second trimester. This will help the expectant mother and dentist to be aware of any problems that may need immediate treatment. Any infections should definitely be treated, as a dental infection can have a systemic effect, which, in turn, might affect the foetus.

I hope your pregnancy goes well. Take good care of those teeth and gums during your pregnancy.

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