Retrograde peri-implantitis associated with residual cysts: 3 Case reports.

BACKGROUND AND OVERVIEW: The authors describe 3 cases of retrograde peri-implantitis associated with residual cysts and their successful surgical and regenerative management. Implants were originally placed with both immediate and delayed protocols.

CASE DESCRIPTION: Three patients sought treatment at the authors' specialist private practices with the chief symptoms of pain and swelling in association with implant-retained restorations. Clinical, radiographic, and histopathologic findings supported the diagnoses of infected residual cysts. The lesions were enucleated in toto, the implant surfaces were decontaminated, and bone regeneration procedures were carried out. Long-term recall visits, ranging from 3 through 10 years, confirmed successful retention of all implants treated accordingly.

CONCLUSIONS AND PRACTICAL IMPLICATIONS: The authors describe an unusual clinical manifestation and emphasize the role of local procedures during implant placement in areas compromised with infection, cysts, or both and the importance of long-term recall visits.