Maxillary upper canines (eye teeth) are commonly impacted requiring surgical uncovering so that your orthodontist can use braces to help them erupt. Canines not erupting naturally can be caused by a delay in baby teeth falling out, crowding of teeth, or the presence of extra teeth. Since canines play a major role in facial support and proper smile alignment, exposing and bracketing them will allow those teeth to erupt over time into their normal positions.