Final answer:
Prior to head and neck radiation, preventive measures should include extracting teeth with questionable prognoses, correcting faulty restorations, and delaying correction of restorations until radiation therapy is completed.
Step-by-step explanation:
Prior to head and neck radiation, there are several preventive measures that should be taken for oral hygiene:
- Perform extraction of teeth with questionable prognoses
- Correct faulty restorations
- Defer correction of faulty restorations until after several months after head and neck radiation is completed
These measures are important to ensure optimal oral health and reduce the risk of complications during and after radiation therapy.