jiǎo zhèng / wán / yá chǐ / hòu / xū yào / pèi dài / bǎo chí qì / yǐ / fáng zhǐ / fù fā

矫正完牙齿后，需要佩戴保持器以防止复发。

After orthodontic treatment, it is necessary to wear a retainer to prevent relapse.