I have two porcelain implants (the teeth on either side of my two front teeth...I was born missing the adult teeth in those two spots...they're basically porcelian teeth that screw into titanium screws implanted in my jaw...that was a fun few surgeries) and I've used Crest White Strips to whiten the rest of my teeth without any problems. My dentist who did the implants told me it was ok to do.