Not really. We don’t usually see rejection of a dental implant. A small percentage of them do fail (about 5%). Usually this is due to infection around the implant, but sometimes the implant just fails to integrate with no real reason seen. In addition about 0.6% of the population has an actual allergy to titanium (a VERY rare occurrence). So, for the vast majority of patients, implants are placed with complete success and remain in function for many, many years.