Fusobacterium sp. are found in small percentages, while BPB are infrequently found. Implants placed in partially edentulous mouths are influenced by the presence of teeth. Teeth may serve as a reservoir for bacterial colonization. It has been hypothesized that there is a difference in the microflora between implant failure caused by trauma and failure due to infection. If the etiologic factor is infection, the microflora is represented by spirochetes and motile rods.
Implants failing due to trauma demonstrate a microbial profile consistent with periodontal health.
Microbial tests should be used in implant patients when pathology caused by infection is suspected. If trauma is the primary cause of pathology, antimicrobials could be used only as an adjunct to therapy.