A radiograph 2 years after implant placement, then 7 years later in a heavy smoker, demonstrating progression of bone loss due to peri-implantitis.
Peri-implantitis is the destructive inflammatory process affecting the soft and hard tissues surrounding dental implants. The array of periodontal pathogens found around failing implants (those affected by peri-implantitis) are very similar to those found in association with various forms of periodontal disease. In compound implants (two stage implants), between the actual implant and the superstructure (abutment) are gaps and cavities into which bacteria can penetrate from the oral cavity. Later these bacteria can return into the adjacent tissue and can cause peri-implantitis.
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^Listgarten and Lai (2000), AAP In-Service Exam, 2008-B12
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