Dental bonding/white filling faded on front tooth, is it possible to rebond or replace?

As a child, I chipped the corner of my front tooth. Skip forward a few years and I got braces. During this time my dentist filled the chip in with white material and it looked great. However, after I had my braces taken off (maybe due to the scraping procedure) I had a very noticeable line between my real tooth and the fake. Now, 2 years later, the difference is very obvious. Is it possible to have the tooth "re filled" or removing the older faded material and replacing it with a new one?