Which of the following precautions should be taken to reduce the risk of chromosome mutations?
a: have routine x-rays taken every week to make sure that your body is healthy
b: refuse any x-ray procedures, regardless of the reason for needing the x-ray
c: wear a lead protective shield when having teeth x-rays
d: no precautions can reduce the risk of chromosome mutations

The correct answer is (c) Wear a lead protective shield when having teeth X-rays.

Earlier it was important to wear lead protective shields when having an dental X-ray to reduce the risk of chromosome mutation. Lead aprons can absorb upto 95 per cent of scattered X-rays. It was used because the X-ray equipment were less sophisticated than today's equipment. The most sensitive organ to tumor is thyroid gland and that's why it is necessary to wear lead protective shield when having a dental X-ray.

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