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A foreign body reaction (FBR) is a typical tissue response to a foreign body within biological tissue. [1] It usually includes the formation of a foreign body granuloma . [ 2 ] Tissue encapsulation of an implant is an example, as is inflammation around a splinter . [ 3 ]
Bone grafting is a surgical procedure that replaces missing bone in order to repair bone fractures that are extremely complex, pose a significant health risk to the patient, or fail to heal properly. Some small or acute fractures can be cured without bone grafting, but the risk is greater for large fractures like compound fractures.
Foreign body giant cells are involved in the foreign body reaction, phagocytosis, and subsequent degradation of biomaterials which may lead to failure of the implanted material. [4] When produced, the FBGC's place themselves along the surface of the implantation, and will remain there for as long as the foreign material remains in the body. [1]
Autografts and isografts are usually not considered as foreign and, therefore, do not elicit rejection. Allografts and xenografts may be recognized as foreign by the recipient and rejected. [1] Autograft: graft taken from one part of the body of an individual and transplanted onto another site in the same individual, e.g., skin graft.
In orthopaedic medicine, a bone graft can be sourced from a patient's own bone in order to fill space and produce an osteogenic response in a bone defect. However, due to the donor-site morbidity associated with autograft, other methods such as bone allograft and bone morphogenetic proteins and synthetic graft materials are often used as alternatives.
Implantation of a porcine valve is a type of Xenotransplantation, or Xenograft, which means a transplant from one species (in this case a pig) to another. There are some risks associated with a Xenograft such as the human body's tendency to reject foreign material. Medication can be used to delay this effect, but is not always successful.
Hence, similar tissue from another part of the body that is in excess is sourced as the autograft. [10] [11] This can be seen in procedures like autologous orthopedic transplant, which remains the "gold standard" of bone grafting methods through extracting grafts from places like the iliac crest and transplanting them to the targeted fracture ...
Two major types of reaction occur in response to retained surgical foreign bodies. In the first type, an abscess may form with or without a secondary bacterial infection . The second reaction is an aseptic fibrinous response, resulting in tissue adhesions and encapsulation and eventually foreign body granuloma . [ 2 ]