Hello! I had a composite filling done almost 4 weeks ago and my tooth is still sensitive to cold. The dentist said the cavity was a bit deep. So i'm wondering if this is normal, or whether it will gradually go away ? I don't have any pain in the tooth, for example, when I bite on it. I only have sensitivity to cold. I've heard it could take a while for sensation to go away if, for example, the cavity is deep. So i'm just wondering if anyone has any idea about this ? Thanks!