Maxillary Canine Implant

To replace a maxillary canine, I create a progressive anterior disclussion involving the maxillary lateral incisor and first premolar prior to the fabrication of the crown for the canine.

This enables the technician to build the maxillary canine crown into a pre-determined progressive anterior disclussion. If I cannot use the lateral incisor, I create a group function using the first and second premolars before the technician fabricates the maxillary canine crown.

Recently several colleagues have told me that they are having maxillary canine crowns made for dental implants that reproduce canine guidance without a progressive anterior disclussion or group function. I wonder if in the long run this will work because of all the lateral forces applied to the crowns in right and left lateral excursions. I a wondering what the rest of you doing for cases like this? I would appreciate any comments. Thanks.