補牙常用於修補蛀牙或修復牙齒外觀。
Filling is commonly performed to restore decayed tooth or restore the esthetics of teeth.
修補蛀牙﹕補牙可以止痛、恢復牙齒的形狀和功能，也可以防止牙齒組織繼續受破壞。
Restoring decayed tooth: Filling can relieve pain, restore the anatomy and function of tooth, and prevent worsening of tooth decay.
修復牙齒外觀﹕補牙可以把崩缺的牙齒回復原貌，也可以縮小牙縫或增大牙齒。
Restoring the esthetics of teeth: Filling can restore fractured teeth, close interdental space, and enlarge teeth to improve appearance.
