Final answer:
The lead apron used during dental X-ray procedures is primarily intended to protect gonadal tissues, which are sensitive to radiation.
Step-by-step explanation:
Prior to exposing a dental radiograph, placement of the lead apron over the client protects gonadal tissues. Gonadal tissues are reproductive tissues that are particularly sensitive to radiation. Dental X-rays, while useful for diagnosing and treating oral health issues, emit radiation that can be harmful to reproductive organs if not properly shielded. The lead apron acts as a protective barrier to minimize radiation exposure to these and other vital organs not being imaged. While skeletal, neural, and cardiac tissues may receive some incidental protection from the lead apron, the primary intention is to protect the gonads from unnecessary radiation exposure.