Implant in a day is when a temporary crown is placed directly over an implant the same day it has been placed. Implant in a day is an option for some patients, and depends on what tooth the implant is replacing, and a variety of other factors considered during an implant consultation. Implant in a day is a good option for patients having implants placed where the tooth is visible, so there is no temporary change in their smile while the implant heals.