Implant Osseointegration Adjacent to a Retained Root Fragment: A Case With 11-Year Follow-up.

There is a growing demand for implant dentistry as the first choice of rehabilitation for treating patients with missing teeth. Clinicians can encounter asymptomatic retained root fragments in edentulous spaces. This case report presents the long-term prognosis of an implant resulting in late failure, with an attached root remnant to the fixture 11 years after implant placement. A 68-year-old female patient presented to the clinic with complaints of function related to a maxillary right four-unit implant-supported bridge 11 years after the first insertion of the implants. After the removal of the restoration, a root remnant was found as adhered to the fixture of the middle supporting implant. The implant was placed encroaching upon the mesial part of the residual root fragment left unintentionally, which was discovered accidentally during the bridge removal. Clinicians should show ultimate attention when utilizing the retained root remnants in implant sites, considering the potential risk of hindering osseointegration. However, osseointegration of the encroached implant and root fragment is plausible, with no detrimental short-term impacts observed. A risk-benefit evaluation should be assessed individually, as late failures can still occur. ClinicalTrials.gov identifier: NCT06671678.