periodontal principle fibers

例句：

1. 1.Periodontal disease is a common problem among adults.
   牙周病是成年人中常见的问题。
2. 2. The dentist recommended that she undergo periodontal treatment.
   牙医建议她接受牙周治疗。
3. 3. Regular dental check-ups are essential for preventing periodontal problems.
   定期的牙科检查对于预防牙周病至关重要。