Unusual Implant Failure and Concurrent Lung Infection

A patient with a history of treated periodontal disease with multiple tooth loss was seeking dental implant treatment. Case Presentation: After aggressive sanative therapy and a single pocket‐reduction surgery, treatment proceeded with one mandibular implant, one immediate maxillary implant, and minor sinus grafting using the crestal approach. Both implants failed to integrate due to infections that appeared unrelated to known periodontal pathogens. Patient referral for additional medical investigation led to diagnosis of serious lung infections. Once the lung conditions were managed with antibiotics, implant retreatment was successful. Conclusion: When dental implants fail, every attempt should be made to understand why and include further medical investigation where indicated.