Listening Quiz: Tại Sao Phim X-quang Quanh Chóp Trước Điều Trị Lại Quan Trọng – Easy Level

1. What is the main purpose of taking a pre-operative periapical radiograph before treatment?
2. According to David, what kinds of problems may be hidden inside the bone?
3. How does the radiograph help during treatment?
4. What does David say about the radiation from the radiograph?
5. What can be inferred about why David values the radiograph before treatment?

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