1. Oligodontia is a rare condition where a person is born with only a few teeth or no teeth at all.
少齿症是一种罕见的病症，患者出生时只有几颗牙齿或者没有牙齿。
2. People with oligodontia often require dental prosthetics or implants to replace the missing teeth.
患有少齿症的人通常需要使用牙科义齿或种植物来替代缺失的牙齿。